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Merge pull request #1080 from baude/kpod_create.pr 

Kpod create.pr
This commit is contained in:
Daniel J Walsh 2017-11-01 13:44:28 -04:00 committed by GitHub
parent 62b157c324 b85fe5ab90
commit fe69289566
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23 changed files with 5197 additions and 9 deletions
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4
README.md
View File

@ -43,7 +43,8 @@ It is currently in active development in the Kubernetes community through the [d
| [kpod(1)](/docs/kpod.1.md) | Simple management tool for pods and images ||
| [kpod-attach(1)](/docs/kpod-attach.1.md) | Instead of providing a `kpod attach` command, the man page `kpod-attach` describes how to use the `kpod logs` and `kpod exec` commands to achieve the same goals as `kpod attach`.||
| [kpod-cp(1)](/docs/kpod-cp.1.md) | Instead of providing a `kpod cp` command, the man page `kpod-cp` describes how to use the `kpod mount` command to have even more flexibility and functionality.||
| [kpod-diff(1)](/docs/kpod-diff.1.md) | Inspect changes on a container or image's filesystem |[![...](/docs/play.png)](https://asciinema.org/a/FXfWB9CKYFwYM4EfqW3NSZy1G)|
| [kpod-create(1)](/docs/kpod-create.1.md) | Create a new container ||
| [kpod-diff(1)](/docs/kpod-diff.1.md) | Inspect changes on a container or image's filesystem ||
| [kpod-export(1)](/docs/kpod-export.1.md) | Export container's filesystem contents as a tar archive |[![...](/docs/play.png)](https://asciinema.org/a/913lBIRAg5hK8asyIhhkQVLtV)|
| [kpod-history(1)](/docs/kpod-history.1.md) | Shows the history of an image |[![...](/docs/play.png)](https://asciinema.org/a/bCvUQJ6DkxInMELZdc5DinNSx)|
| [kpod-images(1)](/docs/kpod-images.1.md) | List images in local storage |[![...](/docs/play.png)](https://asciinema.org/a/133649)|
@ -62,6 +63,7 @@ It is currently in active development in the Kubernetes community through the [d
| [kpod-rename(1)](/docs/kpod-rename.1.md) | Rename a container ||
| [kpod-rm(1)](/docs/kpod-rm.1.md) | Removes one or more containers |[![...](/docs/play.png)](https://asciinema.org/a/7EMk22WrfGtKWmgHJX9Nze1Qp)|
| [kpod-rmi(1)](/docs/kpod-rmi.1.md) | Removes one or more images |[![...](/docs/play.png)](https://asciinema.org/a/133799)|
| [kpod-run(1)](/docs/kpod-run.1.md) | Run a command in a new container ||
| [kpod-save(1)](/docs/kpod-save.1.md) | Saves an image to an archive |[![...](/docs/play.png)](https://asciinema.org/a/kp8kOaexEhEa20P1KLZ3L5X4g)|
| [kpod-stats(1)](/docs/kpod-stats.1.md) | Display a live stream of one or more containers' resource usage statistics||
| [kpod-stop(1)](/docs/kpod-stop.1.md) | Stops one or more running containers ||

319
cmd/kpod/common.go
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@ -49,7 +49,7 @@ func getRuntime(c *cli.Context) (*libpod.Runtime, error) {
options.GraphDriverName = config.Storage
options.GraphDriverOptions = config.StorageOptions
return libpod.NewRuntime(libpod.WithStorageConfig(options))
return libpod.NewRuntime(libpod.WithStorageConfig(options), libpod.WithConmonPath(config.Conmon), libpod.WithOCIRuntime(config.Runtime))
}
func shutdownStores() {
@ -82,7 +82,9 @@ func getConfig(c *cli.Context) (*libkpod.Config, error) {
if c.GlobalIsSet("runroot") {
config.RunRoot = c.GlobalString("runroot")
}
if c.GlobalIsSet("conmon") {
config.Conmon = c.GlobalString("conmon")
}
if c.GlobalIsSet("storage-driver") {
config.Storage = c.GlobalString("storage-driver")
}
@ -133,3 +135,316 @@ func validateFlags(c *cli.Context, flags []cli.Flag) error {
}
return nil
}
// Common flags shared between commands
var createFlags = []cli.Flag{
cli.StringSliceFlag{
Name: "add-host",
Usage: "Add a custom host-to-IP mapping (host:ip) (default [])",
},
cli.StringSliceFlag{
Name: "attach, a",
Usage: "Attach to STDIN, STDOUT or STDERR (default [])",
},
cli.StringFlag{
Name: "blkio-weight",
Usage: "Block IO weight (relative weight) accepts a weight value between 10 and 1000.",
},
cli.StringSliceFlag{
Name: "blkio-weight-device",
Usage: "Block IO weight (relative device weight, format: `DEVICE_NAME:WEIGHT`)",
},
cli.StringSliceFlag{
Name: "cap-add",
Usage: "Add capabilities to the container",
},
cli.StringSliceFlag{
Name: "cap-drop",
Usage: "Drop capabilities from the container",
},
cli.StringFlag{
Name: "cgroup-parent",
Usage: "Optional parent cgroup for the container",
},
cli.StringFlag{
Name: "cidfile",
Usage: "Write the container ID to the file",
},
cli.Uint64Flag{
Name: "cpu-period",
Usage: "Limit the CPU CFS (Completely Fair Scheduler) period",
},
cli.Int64Flag{
Name: "cpu-quota",
Usage: "Limit the CPU CFS (Completely Fair Scheduler) quota",
},
cli.Uint64Flag{
Name: "cpu-rt-period",
Usage: "Limit the CPU real-time period in microseconds",
},
cli.Int64Flag{
Name: "cpu-rt-runtime",
Usage: "Limit the CPU real-time runtime in microseconds",
},
cli.Uint64Flag{
Name: "cpu-shares",
Usage: "CPU shares (relative weight)",
},
cli.StringFlag{
Name: "cpus",
Usage: "Number of CPUs. The default is 0.000 which means no limit",
},
cli.StringFlag{
Name: "cpuset-cpus",
Usage: "CPUs in which to allow execution (0-3, 0,1)",
},
cli.StringFlag{
Name: "cpuset-mems",
Usage: "Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only effective on NUMA systems.",
},
cli.BoolFlag{
Name: "detach, d",
Usage: "Run container in background and print container ID",
},
cli.StringFlag{
Name: "detach-keys",
Usage: "Override the key sequence for detaching a container. Format is a single character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`, `@`, `^`, `[`, `,` or `_`",
},
cli.StringSliceFlag{
Name: "device",
Usage: "Add a host device to the container (default [])",
},
cli.StringSliceFlag{
Name: "device-read-bps",
Usage: "Limit read rate (bytes per second) from a device (e.g. --device-read-bps=/dev/sda:1mb)",
},
cli.StringSliceFlag{
Name: "device-read-iops",
Usage: "Limit read rate (IO per second) from a device (e.g. --device-read-iops=/dev/sda:1000)",
},
cli.StringSliceFlag{
Name: "device-write-bps",
Usage: "Limit write rate (bytes per second) to a device (e.g. --device-write-bps=/dev/sda:1mb)",
},
cli.StringSliceFlag{
Name: "device-write-iops",
Usage: "Limit write rate (IO per second) to a device (e.g. --device-write-iops=/dev/sda:1000)",
},
cli.StringSliceFlag{
Name: "dns",
Usage: "Set custom DNS servers",
},
cli.StringSliceFlag{
Name: "dns-opt",
Usage: "Set custom DNS options",
},
cli.StringSliceFlag{
Name: "dns-search",
Usage: "Set custom DNS search domains",
},
cli.StringFlag{
Name: "entrypoint",
Usage: "Overwrite the default ENTRYPOINT of the image",
},
cli.StringSliceFlag{
Name: "env, e",
Usage: "Set environment variables in container",
},
cli.StringSliceFlag{
Name: "env-file",
Usage: "Read in a file of environment variables",
},
cli.StringSliceFlag{
Name: "expose",
Usage: "Expose a port or a range of ports (default [])",
},
cli.StringSliceFlag{
Name: "group-add",
Usage: "Add additional groups to join (default [])",
},
cli.StringFlag{
Name: "hostname",
Usage: "Set container hostname",
},
cli.BoolFlag{
Name: "interactive, i",
Usage: "Keep STDIN open even if not attached",
},
cli.StringFlag{
Name: "ip",
Usage: "Container IPv4 address (e.g. 172.23.0.9)",
},
cli.StringFlag{
Name: "ip6",
Usage: "Container IPv6 address (e.g. 2001:db8::1b99)",
},
cli.StringFlag{
Name: "ipc",
Usage: "IPC Namespace to use",
},
cli.StringFlag{
Name: "kernel-memory",
Usage: "Kernel memory limit (format: `<number>[<unit>]`, where unit = b, k, m or g)",
},
cli.StringSliceFlag{
Name: "label",
Usage: "Set metadata on container (default [])",
},
cli.StringSliceFlag{
Name: "label-file",
Usage: "Read in a line delimited file of labels (default [])",
},
cli.StringSliceFlag{
Name: "link-local-ip",
Usage: "Container IPv4/IPv6 link-local addresses (default [])",
},
cli.StringFlag{
Name: "log-driver",
Usage: "Logging driver for the container",
},
cli.StringSliceFlag{
Name: "log-opt",
Usage: "Logging driver options (default [])",
},
cli.StringFlag{
Name: "mac-address",
Usage: "Container MAC address (e.g. 92:d0:c6:0a:29:33)",
},
cli.StringFlag{
Name: "memory, m",
Usage: "Memory limit (format: <number>[<unit>], where unit = b, k, m or g)",
},
cli.StringFlag{
Name: "memory-reservation",
Usage: "Memory soft limit (format: <number>[<unit>], where unit = b, k, m or g)",
},
cli.StringFlag{
Name: "memory-swap",
Usage: "Swap limit equal to memory plus swap: '-1' to enable unlimited swap",
},
cli.Int64Flag{
Name: "memory-swappiness",
Usage: "Tune container memory swappiness (0 to 100) (default -1)",
},
cli.StringFlag{
Name: "name",
Usage: "Assign a name to the container",
},
cli.StringFlag{
Name: "net",
Usage: "Setup the network namespace",
},
cli.StringFlag{
Name: "network",
Usage: "Connect a container to a network (default 'default')",
},
cli.StringSliceFlag{
Name: "network-alias",
Usage: "Add network-scoped alias for the container (default [])",
},
cli.BoolFlag{
Name: "oom-kill-disable",
Usage: "Disable OOM Killer",
},
cli.StringFlag{
Name: "oom-score-adj",
Usage: "Tune the host's OOM preferences (-1000 to 1000)",
},
cli.StringFlag{
Name: "pid",
Usage: "PID Namespace to use",
},
cli.Int64Flag{
Name: "pids-limit",
Usage: "Tune container pids limit (set -1 for unlimited)",
},
cli.StringFlag{
Name: "pod",
Usage: "Run container in an existing pod",
},
cli.BoolFlag{
Name: "privileged",
Usage: "Give extended privileges to container",
},
cli.StringSliceFlag{
Name: "publish, p",
Usage: "Publish a container's port, or a range of ports, to the host (default [])",
},
cli.BoolFlag{
Name: "publish-all, P",
Usage: "Publish all exposed ports to random ports on the host interface",
},
cli.BoolFlag{
Name: "read-only",
Usage: "Make containers root filesystem read-only",
},
cli.BoolFlag{
Name: "rm",
Usage: "Remove container (and pod if created) after exit",
},
cli.StringSliceFlag{
Name: "security-opt",
Usage: "Security Options (default [])",
},
cli.StringFlag{
Name: "shm-size",
Usage: "Size of `/dev/shm`. The format is `<number><unit>`. default is 64 MB",
},
cli.BoolFlag{
Name: "sig-proxy",
Usage: "Proxy received signals to the process (default true)",
},
cli.StringFlag{
Name: "stop-signal",
Usage: "Signal to stop a container. Default is SIGTERM",
},
cli.IntFlag{
Name: "stop-timeout",
Usage: "Timeout (in seconds) to stop a container. Default is 10",
},
cli.StringSliceFlag{
Name: "storage-opt",
Usage: "Storage driver options per container (default [])",
},
cli.StringSliceFlag{
Name: "sysctl",
Usage: "Sysctl options (default [])",
},
cli.StringSliceFlag{
Name: "tmpfs",
Usage: "Mount a temporary filesystem (`tmpfs`) into a container (default [])",
},
cli.BoolFlag{
Name: "tty, t",
Usage: "Allocate a pseudo-TTY for container",
},
cli.StringSliceFlag{
Name: "ulimit",
Usage: "Ulimit options (default [])",
},
cli.StringFlag{
Name: "user, u",
Usage: "Username or UID (format: <name|uid>[:<group|gid>])",
},
cli.StringFlag{
Name: "userns",
Usage: "User namespace to use",
},
cli.StringFlag{
Name: "uts",
Usage: "UTS namespace to use",
},
cli.StringSliceFlag{
Name: "volume, v",
Usage: "Bind mount a volume into the container (default [])",
},
cli.StringSliceFlag{
Name: "volumes-from",
Usage: "Mount volumes from the specified container(s) (default [])",
},
cli.StringFlag{
Name: "workdir, w",
Usage: "Working `directory inside the container",
Value: "/",
},
}

343
cmd/kpod/create.go Normal file
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@ -0,0 +1,343 @@
package main
import (
"fmt"
"strconv"
"github.com/docker/go-units"
"github.com/kubernetes-incubator/cri-o/libpod"
"github.com/pkg/errors"
"github.com/urfave/cli"
pb "k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
)
type mountType string
// Type constants
const (
// TypeBind is the type for mounting host dir
TypeBind mountType = "bind"
// TypeVolume is the type for remote storage volumes
// TypeVolume mountType = "volume" // re-enable upon use
// TypeTmpfs is the type for mounting tmpfs
TypeTmpfs mountType = "tmpfs"
)
var (
defaultEnvVariables = []string{"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "TERM=xterm"}
)
type createResourceConfig struct {
blkioDevice []string // blkio-weight-device
blkioWeight uint16 // blkio-weight
cpuPeriod uint64 // cpu-period
cpuQuota int64 // cpu-quota
cpuRtPeriod uint64 // cpu-rt-period
cpuRtRuntime int64 // cpu-rt-runtime
cpuShares uint64 // cpu-shares
cpus string // cpus
cpusetCpus string
cpusetMems string // cpuset-mems
deviceReadBps []string // device-read-bps
deviceReadIops []string // device-read-iops
deviceWriteBps []string // device-write-bps
deviceWriteIops []string // device-write-iops
disableOomKiller bool // oom-kill-disable
kernelMemory int64 // kernel-memory
memory int64 //memory
memoryReservation int64 // memory-reservation
memorySwap int64 //memory-swap
memorySwapiness uint64 // memory-swappiness
oomScoreAdj int //oom-score-adj
pidsLimit int64 // pids-limit
shmSize string
ulimit []string //ulimit
}
type createConfig struct {
args []string
capAdd []string // cap-add
capDrop []string // cap-drop
cidFile string
cgroupParent string // cgroup-parent
command []string
detach bool // detach
devices []*pb.Device // device
dnsOpt []string //dns-opt
dnsSearch []string //dns-search
dnsServers []string //dns
entrypoint string //entrypoint
env []string //env
expose []string //expose
groupAdd []uint32 // group-add
hostname string //hostname
image string
interactive bool //interactive
ip6Address string //ipv6
ipAddress string //ip
labels map[string]string //label
linkLocalIP []string // link-local-ip
logDriver string // log-driver
logDriverOpt []string // log-opt
macAddress string //mac-address
name string //name
network string //network
networkAlias []string //network-alias
nsIPC string // ipc
nsNet string //net
nsPID string //pid
nsUser string
pod string //pod
privileged bool //privileged
publish []string //publish
publishAll bool //publish-all
readOnlyRootfs bool //read-only
resources createResourceConfig
rm bool //rm
securityOpts []string //security-opt
sigProxy bool //sig-proxy
stopSignal string // stop-signal
stopTimeout int64 // stop-timeout
storageOpts []string //storage-opt
sysctl map[string]string //sysctl
tmpfs []string // tmpfs
tty bool //tty
user uint32 //user
group uint32 // group
volumes []string //volume
volumesFrom []string //volumes-from
workDir string //workdir
}
var createDescription = "Creates a new container from the given image or" +
" storage and prepares it for running the specified command. The" +
" container ID is then printed to stdout. You can then start it at" +
" any time with the kpod start <container_id> command. The container" +
" will be created with the initial state 'created'."
var createCommand = cli.Command{
Name: "create",
Usage: "create but do not start a container",
Description: createDescription,
Flags: createFlags,
Action: createCmd,
ArgsUsage: "IMAGE [COMMAND [ARG...]]",
}
func createCmd(c *cli.Context) error {
// TODO should allow user to create based off a directory on the host not just image
// Need CLI support for this
if err := validateFlags(c, createFlags); err != nil {
return err
}
runtime, err := getRuntime(c)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
createConfig, err := parseCreateOpts(c, runtime)
if err != nil {
return err
}
// Deal with the image after all the args have been checked
createImage := runtime.NewImage(createConfig.image)
if !createImage.HasImageLocal() {
// The image wasnt found by the user input'd name or its fqname
// Pull the image
fmt.Printf("Trying to pull %s...", createImage.PullName)
createImage.Pull()
}
runtimeSpec, err := createConfigToOCISpec(createConfig)
if err != nil {
return err
}
defer runtime.Shutdown(false)
imageName, err := createImage.GetFQName()
if err != nil {
return err
}
imageID, err := createImage.GetImageID()
if err != nil {
return err
}
options, err := createConfig.GetContainerCreateOptions(c)
if err != nil {
return errors.Wrapf(err, "unable to parse new container options")
}
// Gather up the options for NewContainer which consist of With... funcs
options = append(options, libpod.WithRootFSFromImage(imageID, imageName, false))
ctr, err := runtime.NewContainer(runtimeSpec, options...)
if err != nil {
return err
}
if c.String("cidfile") != "" {
libpod.WriteFile(ctr.ID(), c.String("cidfile"))
} else {
fmt.Printf("%s\n", ctr.ID())
}
return nil
}
// Parses CLI options related to container creation into a config which can be
// parsed into an OCI runtime spec
func parseCreateOpts(c *cli.Context, runtime *libpod.Runtime) (*createConfig, error) {
var command []string
var memoryLimit, memoryReservation, memorySwap, memoryKernel int64
var blkioWeight uint16
var uid, gid uint32
image := c.Args()[0]
if len(c.Args()) < 1 {
return nil, errors.Errorf("image name or ID is required")
}
if len(c.Args()) > 1 {
command = c.Args()[1:]
}
// LABEL VARIABLES
labels, err := getAllLabels(c)
if err != nil {
return &createConfig{}, errors.Wrapf(err, "unable to process labels")
}
// ENVIRONMENT VARIABLES
// TODO where should env variables be verified to be x=y format
env, err := getAllEnvironmentVariables(c)
if err != nil {
return &createConfig{}, errors.Wrapf(err, "unable to process environment variables")
}
sysctl, err := convertStringSliceToMap(c.StringSlice("sysctl"), "=")
if err != nil {
return &createConfig{}, errors.Wrapf(err, "sysctl values must be in the form of KEY=VALUE")
}
groupAdd, err := stringSlicetoUint32Slice(c.StringSlice("group-add"))
if err != nil {
return &createConfig{}, errors.Wrapf(err, "invalid value for groups provided")
}
if c.String("user") != "" {
// TODO
// We need to mount the imagefs and get the uid/gid
// For now, user zeros
uid = 0
gid = 0
}
if c.String("memory") != "" {
memoryLimit, err = units.RAMInBytes(c.String("memory"))
if err != nil {
return nil, errors.Wrapf(err, "invalid value for memory")
}
}
if c.String("memory-reservation") != "" {
memoryReservation, err = units.RAMInBytes(c.String("memory-reservation"))
if err != nil {
return nil, errors.Wrapf(err, "invalid value for memory-reservation")
}
}
if c.String("memory-swap") != "" {
memorySwap, err = units.RAMInBytes(c.String("memory-swap"))
if err != nil {
return nil, errors.Wrapf(err, "invalid value for memory-swap")
}
}
if c.String("kernel-memory") != "" {
memoryKernel, err = units.RAMInBytes(c.String("kernel-memory"))
if err != nil {
return nil, errors.Wrapf(err, "invalid value for kernel-memory")
}
}
if c.String("blkio-weight") != "" {
u, err := strconv.ParseUint(c.String("blkio-weight"), 10, 16)
if err != nil {
return nil, errors.Wrapf(err, "invalid value for blkio-weight")
}
blkioWeight = uint16(u)
}
config := &createConfig{
capAdd: c.StringSlice("cap-add"),
capDrop: c.StringSlice("cap-drop"),
cgroupParent: c.String("cgroup-parent"),
command: command,
detach: c.Bool("detach"),
dnsOpt: c.StringSlice("dns-opt"),
dnsSearch: c.StringSlice("dns-search"),
dnsServers: c.StringSlice("dns"),
entrypoint: c.String("entrypoint"),
env: env,
expose: c.StringSlice("env"),
groupAdd: groupAdd,
hostname: c.String("hostname"),
image: image,
interactive: c.Bool("interactive"),
ip6Address: c.String("ipv6"),
ipAddress: c.String("ip"),
labels: labels,
linkLocalIP: c.StringSlice("link-local-ip"),
logDriver: c.String("log-driver"),
logDriverOpt: c.StringSlice("log-opt"),
macAddress: c.String("mac-address"),
name: c.String("name"),
network: c.String("network"),
networkAlias: c.StringSlice("network-alias"),
nsIPC: c.String("ipc"),
nsNet: c.String("net"),
nsPID: c.String("pid"),
pod: c.String("pod"),
privileged: c.Bool("privileged"),
publish: c.StringSlice("publish"),
publishAll: c.Bool("publish-all"),
readOnlyRootfs: c.Bool("read-only"),
resources: createResourceConfig{
blkioWeight: blkioWeight,
blkioDevice: c.StringSlice("blkio-weight-device"),
cpuShares: c.Uint64("cpu-shares"),
cpuPeriod: c.Uint64("cpu-period"),
cpusetCpus: c.String("cpu-period"),
cpusetMems: c.String("cpuset-mems"),
cpuQuota: c.Int64("cpu-quota"),
cpuRtPeriod: c.Uint64("cpu-rt-period"),
cpuRtRuntime: c.Int64("cpu-rt-runtime"),
cpus: c.String("cpus"),
deviceReadBps: c.StringSlice("device-read-bps"),
deviceReadIops: c.StringSlice("device-read-iops"),
deviceWriteBps: c.StringSlice("device-write-bps"),
deviceWriteIops: c.StringSlice("device-write-iops"),
disableOomKiller: c.Bool("oom-kill-disable"),
shmSize: c.String("shm-size"),
memory: memoryLimit,
memoryReservation: memoryReservation,
memorySwap: memorySwap,
memorySwapiness: c.Uint64("memory-swapiness"),
kernelMemory: memoryKernel,
oomScoreAdj: c.Int("oom-score-adj"),
pidsLimit: c.Int64("pids-limit"),
ulimit: c.StringSlice("ulimit"),
},
rm: c.Bool("rm"),
securityOpts: c.StringSlice("security-opt"),
sigProxy: c.Bool("sig-proxy"),
stopSignal: c.String("stop-signal"),
stopTimeout: c.Int64("stop-timeout"),
storageOpts: c.StringSlice("storage-opt"),
sysctl: sysctl,
tmpfs: c.StringSlice("tmpfs"),
tty: c.Bool("tty"),
user: uid,
group: gid,
volumes: c.StringSlice("volume"),
volumesFrom: c.StringSlice("volumes-from"),
workDir: c.String("workdir"),
}
return config, nil
}

52
cmd/kpod/create_cli.go Normal file
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@ -0,0 +1,52 @@
package main
import (
"strings"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
func getAllLabels(cli *cli.Context) (map[string]string, error) {
var labelValues []string
labels := make(map[string]string)
labelValues, labelErr := readKVStrings(cli.StringSlice("label-file"), cli.StringSlice("label"))
if labelErr != nil {
return labels, errors.Wrapf(labelErr, "unable to process labels from --label and label-file")
}
// Process KEY=VALUE stringslice in string map for WithLabels func
if len(labelValues) > 0 {
for _, i := range labelValues {
spliti := strings.Split(i, "=")
if len(spliti) > 1 {
return labels, errors.Errorf("labels must be in KEY=VALUE format: %s is invalid", i)
}
labels[spliti[0]] = spliti[1]
}
}
return labels, nil
}
func getAllEnvironmentVariables(cli *cli.Context) ([]string, error) {
env, err := readKVStrings(cli.StringSlice("env-file"), cli.StringSlice("env"))
if err != nil {
return []string{}, errors.Wrapf(err, "unable to process variables from --env and --env-file")
}
// Add default environment variables if nothing defined
if len(env) == 0 {
env = append(env, defaultEnvVariables...)
}
return env, nil
}
func convertStringSliceToMap(strSlice []string, delimiter string) (map[string]string, error) {
sysctl := make(map[string]string)
for _, inputSysctl := range strSlice {
values := strings.Split(inputSysctl, delimiter)
if len(values) < 2 {
return sysctl, errors.Errorf("%s in an invalid sysctl value", inputSysctl)
}
sysctl[values[0]] = values[1]
}
return sysctl, nil
}

6
cmd/kpod/main.go
View File

@ -31,6 +31,7 @@ func main() {
app.Version = v
app.Commands = []cli.Command{
createCommand,
diffCommand,
exportCommand,
historyCommand,
@ -50,6 +51,7 @@ func main() {
renameCommand,
rmCommand,
rmiCommand,
runCommand,
saveCommand,
statsCommand,
stopCommand,
@ -92,6 +94,10 @@ func main() {
Name: "config, c",
Usage: "path of a config file detailing container server configuration options",
},
cli.StringFlag{
Name: "conmon",
Usage: "path of the conmon binary",
},
cli.StringFlag{
Name: "log-level",
Usage: "log messages above specified level: debug, info, warn, error (default), fatal or panic",

886
cmd/kpod/parse.go Normal file
View File

@ -0,0 +1,886 @@
//nolint
// most of these validate and parse functions have been taken from projectatomic/docker
// and modified for cri-o
package main
import (
"bufio"
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net"
"os"
"os/user"
"path"
"regexp"
"strconv"
"strings"
units "github.com/docker/go-units"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
pb "k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
)
// Note: for flags that are in the form <number><unit>, use the RAMInBytes function
// from the units package in docker/go-units/size.go
var (
whiteSpaces = " \t"
alphaRegexp = regexp.MustCompile(`[a-zA-Z]`)
domainRegexp = regexp.MustCompile(`^(:?(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]))(:?\.(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])))*)\.?\s*$`)
)
// validateExtraHost validates that the specified string is a valid extrahost and returns it.
// ExtraHost is in the form of name:ip where the ip has to be a valid ip (ipv4 or ipv6).
// for add-host flag
func validateExtraHost(val string) (string, error) { //nolint
// allow for IPv6 addresses in extra hosts by only splitting on first ":"
arr := strings.SplitN(val, ":", 2)
if len(arr) != 2 || len(arr[0]) == 0 {
return "", fmt.Errorf("bad format for add-host: %q", val)
}
if _, err := validateIPAddress(arr[1]); err != nil {
return "", fmt.Errorf("invalid IP address in add-host: %q", arr[1])
}
return val, nil
}
// validateIPAddress validates an Ip address.
// for dns, ip, and ip6 flags also
func validateIPAddress(val string) (string, error) {
var ip = net.ParseIP(strings.TrimSpace(val))
if ip != nil {
return ip.String(), nil
}
return "", fmt.Errorf("%s is not an ip address", val)
}
// validateAttach validates that the specified string is a valid attach option.
// for attach flag
func validateAttach(val string) (string, error) { //nolint
s := strings.ToLower(val)
for _, str := range []string{"stdin", "stdout", "stderr"} {
if s == str {
return s, nil
}
}
return val, fmt.Errorf("valid streams are STDIN, STDOUT and STDERR")
}
// validate the blkioWeight falls in the range of 10 to 1000
// for blkio-weight flag
func validateBlkioWeight(val int64) (int64, error) { //nolint
if val >= 10 && val <= 1000 {
return val, nil
}
return -1, errors.Errorf("invalid blkio weight %q, should be between 10 and 1000", val)
}
// weightDevice is a structure that holds device:weight pair
type weightDevice struct {
path string
weight uint16
}
func (w *weightDevice) String() string {
return fmt.Sprintf("%s:%d", w.path, w.weight)
}
// validateweightDevice validates that the specified string has a valid device-weight format
// for blkio-weight-device flag
func validateweightDevice(val string) (*weightDevice, error) {
split := strings.SplitN(val, ":", 2)
if len(split) != 2 {
return nil, fmt.Errorf("bad format: %s", val)
}
if !strings.HasPrefix(split[0], "/dev/") {
return nil, fmt.Errorf("bad format for device path: %s", val)
}
weight, err := strconv.ParseUint(split[1], 10, 0)
if err != nil {
return nil, fmt.Errorf("invalid weight for device: %s", val)
}
if weight > 0 && (weight < 10 || weight > 1000) {
return nil, fmt.Errorf("invalid weight for device: %s", val)
}
return &weightDevice{
path: split[0],
weight: uint16(weight),
}, nil
}
// parseDevice parses a device mapping string to a container.DeviceMapping struct
// for device flag
func parseDevice(device string) (*pb.Device, error) { //nolint
_, err := validateDevice(device)
if err != nil {
return nil, errors.Wrapf(err, "device string not valid %q", device)
}
src := ""
dst := ""
permissions := "rwm"
arr := strings.Split(device, ":")
switch len(arr) {
case 3:
permissions = arr[2]
fallthrough
case 2:
if validDeviceMode(arr[1]) {
permissions = arr[1]
} else {
dst = arr[1]
}
fallthrough
case 1:
src = arr[0]
default:
return nil, fmt.Errorf("invalid device specification: %s", device)
}
if dst == "" {
dst = src
}
deviceMapping := &pb.Device{
ContainerPath: dst,
HostPath: src,
Permissions: permissions,
}
return deviceMapping, nil
}
// validDeviceMode checks if the mode for device is valid or not.
// Valid mode is a composition of r (read), w (write), and m (mknod).
func validDeviceMode(mode string) bool {
var legalDeviceMode = map[rune]bool{
'r': true,
'w': true,
'm': true,
}
if mode == "" {
return false
}
for _, c := range mode {
if !legalDeviceMode[c] {
return false
}
legalDeviceMode[c] = false
}
return true
}
// validateDevice validates a path for devices
// It will make sure 'val' is in the form:
// [host-dir:]container-path[:mode]
// It also validates the device mode.
func validateDevice(val string) (string, error) {
return validatePath(val, validDeviceMode)
}
func validatePath(val string, validator func(string) bool) (string, error) {
var containerPath string
var mode string
if strings.Count(val, ":") > 2 {
return val, fmt.Errorf("bad format for path: %s", val)
}
split := strings.SplitN(val, ":", 3)
if split[0] == "" {
return val, fmt.Errorf("bad format for path: %s", val)
}
switch len(split) {
case 1:
containerPath = split[0]
val = path.Clean(containerPath)
case 2:
if isValid := validator(split[1]); isValid {
containerPath = split[0]
mode = split[1]
val = fmt.Sprintf("%s:%s", path.Clean(containerPath), mode)
} else {
containerPath = split[1]
val = fmt.Sprintf("%s:%s", split[0], path.Clean(containerPath))
}
case 3:
containerPath = split[1]
mode = split[2]
if isValid := validator(split[2]); !isValid {
return val, fmt.Errorf("bad mode specified: %s", mode)
}
val = fmt.Sprintf("%s:%s:%s", split[0], containerPath, mode)
}
if !path.IsAbs(containerPath) {
return val, fmt.Errorf("%s is not an absolute path", containerPath)
}
return val, nil
}
// throttleDevice is a structure that holds device:rate_per_second pair
type throttleDevice struct {
path string
rate uint64
}
func (t *throttleDevice) String() string {
return fmt.Sprintf("%s:%d", t.path, t.rate)
}
// validateBpsDevice validates that the specified string has a valid device-rate format
// for device-read-bps and device-write-bps flags
func validateBpsDevice(val string) (*throttleDevice, error) {
split := strings.SplitN(val, ":", 2)
if len(split) != 2 {
return nil, fmt.Errorf("bad format: %s", val)
}
if !strings.HasPrefix(split[0], "/dev/") {
return nil, fmt.Errorf("bad format for device path: %s", val)
}
rate, err := units.RAMInBytes(split[1])
if err != nil {
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>[<unit>]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val)
}
if rate < 0 {
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>[<unit>]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val)
}
return &throttleDevice{
path: split[0],
rate: uint64(rate),
}, nil
}
// validateIOpsDevice validates that the specified string has a valid device-rate format
// for device-write-iops and device-read-iops flags
func validateIOpsDevice(val string) (*throttleDevice, error) { //nolint
split := strings.SplitN(val, ":", 2)
if len(split) != 2 {
return nil, fmt.Errorf("bad format: %s", val)
}
if !strings.HasPrefix(split[0], "/dev/") {
return nil, fmt.Errorf("bad format for device path: %s", val)
}
rate, err := strconv.ParseUint(split[1], 10, 64)
if err != nil {
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
}
if rate < 0 {
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
}
return &throttleDevice{
path: split[0],
rate: uint64(rate),
}, nil
}
// validateDNSSearch validates domain for resolvconf search configuration.
// A zero length domain is represented by a dot (.).
// for dns-search flag
func validateDNSSearch(val string) (string, error) { //nolint
if val = strings.Trim(val, " "); val == "." {
return val, nil
}
return validateDomain(val)
}
func validateDomain(val string) (string, error) {
if alphaRegexp.FindString(val) == "" {
return "", fmt.Errorf("%s is not a valid domain", val)
}
ns := domainRegexp.FindSubmatch([]byte(val))
if len(ns) > 0 && len(ns[1]) < 255 {
return string(ns[1]), nil
}
return "", fmt.Errorf("%s is not a valid domain", val)
}
// validateEnv validates an environment variable and returns it.
// If no value is specified, it returns the current value using os.Getenv.
// for env flag
func validateEnv(val string) (string, error) { //nolint
arr := strings.Split(val, "=")
if len(arr) > 1 {
return val, nil
}
if !doesEnvExist(val) {
return val, nil
}
return fmt.Sprintf("%s=%s", val, os.Getenv(val)), nil
}
func doesEnvExist(name string) bool {
for _, entry := range os.Environ() {
parts := strings.SplitN(entry, "=", 2)
if parts[0] == name {
return true
}
}
return false
}
// reads a file of line terminated key=value pairs, and overrides any keys
// present in the file with additional pairs specified in the override parameter
// for env-file and labels-file flags
func readKVStrings(files []string, override []string) ([]string, error) {
envVariables := []string{}
for _, ef := range files {
parsedVars, err := parseEnvFile(ef)
if err != nil {
return nil, err
}
envVariables = append(envVariables, parsedVars...)
}
// parse the '-e' and '--env' after, to allow override
envVariables = append(envVariables, override...)
return envVariables, nil
}
// parseEnvFile reads a file with environment variables enumerated by lines
func parseEnvFile(filename string) ([]string, error) {
fh, err := os.Open(filename)
if err != nil {
return []string{}, err
}
defer fh.Close()
lines := []string{}
scanner := bufio.NewScanner(fh)
for scanner.Scan() {
// trim the line from all leading whitespace first
line := strings.TrimLeft(scanner.Text(), whiteSpaces)
// line is not empty, and not starting with '#'
if len(line) > 0 && !strings.HasPrefix(line, "#") {
data := strings.SplitN(line, "=", 2)
// trim the front of a variable, but nothing else
variable := strings.TrimLeft(data[0], whiteSpaces)
if strings.ContainsAny(variable, whiteSpaces) {
return []string{}, errors.Errorf("variable %q has white spaces, poorly formatted environment", variable)
}
if len(data) > 1 {
// pass the value through, no trimming
lines = append(lines, fmt.Sprintf("%s=%s", variable, data[1]))
} else {
// if only a pass-through variable is given, clean it up.
lines = append(lines, fmt.Sprintf("%s=%s", strings.TrimSpace(line), os.Getenv(line)))
}
}
}
return lines, scanner.Err()
}
// NsIpc represents the container ipc stack.
// for ipc flag
type NsIpc string
// IsPrivate indicates whether the container uses its private ipc stack.
func (n NsIpc) IsPrivate() bool {
return !(n.IsHost() || n.IsContainer())
}
// IsHost indicates whether the container uses the host's ipc stack.
func (n NsIpc) IsHost() bool {
return n == "host"
}
// IsContainer indicates whether the container uses a container's ipc stack.
func (n NsIpc) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// Valid indicates whether the ipc stack is valid.
func (n NsIpc) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host":
case "container":
if len(parts) != 2 || parts[1] == "" {
return false
}
default:
return false
}
return true
}
// Container returns the name of the container ipc stack is going to be used.
func (n NsIpc) Container() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// validateLabel validates that the specified string is a valid label, and returns it.
// Labels are in the form on key=value.
// for label flag
func validateLabel(val string) (string, error) { //nolint
if strings.Count(val, "=") < 1 {
return "", fmt.Errorf("bad attribute format: %s", val)
}
return val, nil
}
// validateMACAddress validates a MAC address.
// for mac-address flag
func validateMACAddress(val string) (string, error) { //nolint
_, err := net.ParseMAC(strings.TrimSpace(val))
if err != nil {
return "", err
}
return val, nil
}
// validateLink validates that the specified string has a valid link format (containerName:alias).
func validateLink(val string) (string, error) { //nolint
if _, _, err := parseLink(val); err != nil {
return val, err
}
return val, nil
}
// parseLink parses and validates the specified string as a link format (name:alias)
func parseLink(val string) (string, string, error) {
if val == "" {
return "", "", fmt.Errorf("empty string specified for links")
}
arr := strings.Split(val, ":")
if len(arr) > 2 {
return "", "", fmt.Errorf("bad format for links: %s", val)
}
if len(arr) == 1 {
return val, val, nil
}
// This is kept because we can actually get a HostConfig with links
// from an already created container and the format is not `foo:bar`
// but `/foo:/c1/bar`
if strings.HasPrefix(arr[0], "/") {
_, alias := path.Split(arr[1])
return arr[0][1:], alias, nil
}
return arr[0], arr[1], nil
}
// parseLoggingOpts validates the logDriver and logDriverOpts
// for log-opt and log-driver flags
func parseLoggingOpts(logDriver string, logDriverOpt []string) (map[string]string, error) { //nolint
logOptsMap := convertKVStringsToMap(logDriverOpt)
if logDriver == "none" && len(logDriverOpt) > 0 {
return map[string]string{}, errors.Errorf("invalid logging opts for driver %s", logDriver)
}
return logOptsMap, nil
}
// NsPid represents the pid namespace of the container.
//for pid flag
type NsPid string
// IsPrivate indicates whether the container uses its own new pid namespace.
func (n NsPid) IsPrivate() bool {
return !(n.IsHost() || n.IsContainer())
}
// IsHost indicates whether the container uses the host's pid namespace.
func (n NsPid) IsHost() bool {
return n == "host"
}
// IsContainer indicates whether the container uses a container's pid namespace.
func (n NsPid) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// Valid indicates whether the pid namespace is valid.
func (n NsPid) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host":
case "container":
if len(parts) != 2 || parts[1] == "" {
return false
}
default:
return false
}
return true
}
// Container returns the name of the container whose pid namespace is going to be used.
func (n NsPid) Container() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// parsePortSpecs receives port specs in the format of ip:public:private/proto and parses
// these in to the internal types
// for publish, publish-all, and expose flags
func parsePortSpecs(ports []string) ([]*pb.PortMapping, error) { //nolint
var portMappings []*pb.PortMapping
for _, rawPort := range ports {
portMapping, err := parsePortSpec(rawPort)
if err != nil {
return nil, err
}
portMappings = append(portMappings, portMapping...)
}
return portMappings, nil
}
func validateProto(proto string) bool {
for _, availableProto := range []string{"tcp", "udp"} {
if availableProto == proto {
return true
}
}
return false
}
// parsePortSpec parses a port specification string into a slice of PortMappings
func parsePortSpec(rawPort string) ([]*pb.PortMapping, error) {
var proto string
rawIP, hostPort, containerPort := splitParts(rawPort)
proto, containerPort = splitProtoPort(containerPort)
// Strip [] from IPV6 addresses
ip, _, err := net.SplitHostPort(rawIP + ":")
if err != nil {
return nil, fmt.Errorf("Invalid ip address %v: %s", rawIP, err)
}
if ip != "" && net.ParseIP(ip) == nil {
return nil, fmt.Errorf("Invalid ip address: %s", ip)
}
if containerPort == "" {
return nil, fmt.Errorf("No port specified: %s<empty>", rawPort)
}
startPort, endPort, err := parsePortRange(containerPort)
if err != nil {
return nil, fmt.Errorf("Invalid containerPort: %s", containerPort)
}
var startHostPort, endHostPort uint64 = 0, 0
if len(hostPort) > 0 {
startHostPort, endHostPort, err = parsePortRange(hostPort)
if err != nil {
return nil, fmt.Errorf("Invalid hostPort: %s", hostPort)
}
}
if hostPort != "" && (endPort-startPort) != (endHostPort-startHostPort) {
// Allow host port range iff containerPort is not a range.
// In this case, use the host port range as the dynamic
// host port range to allocate into.
if endPort != startPort {
return nil, fmt.Errorf("Invalid ranges specified for container and host Ports: %s and %s", containerPort, hostPort)
}
}
if !validateProto(strings.ToLower(proto)) {
return nil, fmt.Errorf("invalid proto: %s", proto)
}
protocol := pb.Protocol_TCP
if strings.ToLower(proto) == "udp" {
protocol = pb.Protocol_UDP
}
var ports []*pb.PortMapping
for i := uint64(0); i <= (endPort - startPort); i++ {
containerPort = strconv.FormatUint(startPort+i, 10)
if len(hostPort) > 0 {
hostPort = strconv.FormatUint(startHostPort+i, 10)
}
// Set hostPort to a range only if there is a single container port
// and a dynamic host port.
if startPort == endPort && startHostPort != endHostPort {
hostPort = fmt.Sprintf("%s-%s", hostPort, strconv.FormatUint(endHostPort, 10))
}
ctrPort, err := strconv.ParseInt(containerPort, 10, 32)
if err != nil {
return nil, err
}
hPort, err := strconv.ParseInt(hostPort, 10, 32)
if err != nil {
return nil, err
}
port := &pb.PortMapping{
Protocol: protocol,
ContainerPort: int32(ctrPort),
HostPort: int32(hPort),
HostIp: ip,
}
ports = append(ports, port)
}
return ports, nil
}
// parsePortRange parses and validates the specified string as a port-range (8000-9000)
func parsePortRange(ports string) (uint64, uint64, error) {
if ports == "" {
return 0, 0, fmt.Errorf("empty string specified for ports")
}
if !strings.Contains(ports, "-") {
start, err := strconv.ParseUint(ports, 10, 16)
end := start
return start, end, err
}
parts := strings.Split(ports, "-")
start, err := strconv.ParseUint(parts[0], 10, 16)
if err != nil {
return 0, 0, err
}
end, err := strconv.ParseUint(parts[1], 10, 16)
if err != nil {
return 0, 0, err
}
if end < start {
return 0, 0, fmt.Errorf("Invalid range specified for the Port: %s", ports)
}
return start, end, nil
}
// splitParts separates the different parts of rawPort
func splitParts(rawport string) (string, string, string) {
parts := strings.Split(rawport, ":")
n := len(parts)
containerport := parts[n-1]
switch n {
case 1:
return "", "", containerport
case 2:
return "", parts[0], containerport
case 3:
return parts[0], parts[1], containerport
default:
return strings.Join(parts[:n-2], ":"), parts[n-2], containerport
}
}
// splitProtoPort splits a port in the format of port/proto
func splitProtoPort(rawPort string) (string, string) {
parts := strings.Split(rawPort, "/")
l := len(parts)
if len(rawPort) == 0 || l == 0 || len(parts[0]) == 0 {
return "", ""
}
if l == 1 {
return "tcp", rawPort
}
if len(parts[1]) == 0 {
return "tcp", parts[0]
}
return parts[1], parts[0]
}
// takes a local seccomp file and reads its file contents
// for security-opt flag
func parseSecurityOpts(securityOpts []string) ([]string, error) { //nolint
for key, opt := range securityOpts {
con := strings.SplitN(opt, "=", 2)
if len(con) == 1 && con[0] != "no-new-privileges" {
if strings.Index(opt, ":") != -1 {
con = strings.SplitN(opt, ":", 2)
} else {
return securityOpts, fmt.Errorf("Invalid --security-opt: %q", opt)
}
}
if con[0] == "seccomp" && con[1] != "unconfined" {
f, err := ioutil.ReadFile(con[1])
if err != nil {
return securityOpts, fmt.Errorf("opening seccomp profile (%s) failed: %v", con[1], err)
}
b := bytes.NewBuffer(nil)
if err := json.Compact(b, f); err != nil {
return securityOpts, fmt.Errorf("compacting json for seccomp profile (%s) failed: %v", con[1], err)
}
securityOpts[key] = fmt.Sprintf("seccomp=%s", b.Bytes())
}
}
return securityOpts, nil
}
// parses storage options per container into a map
// for storage-opt flag
func parseStorageOpts(storageOpts []string) (map[string]string, error) { //nolint
m := make(map[string]string)
for _, option := range storageOpts {
if strings.Contains(option, "=") {
opt := strings.SplitN(option, "=", 2)
m[opt[0]] = opt[1]
} else {
return nil, errors.Errorf("invalid storage option %q", option)
}
}
return m, nil
}
// parseUser parses the the uid and gid in the format <name|uid>[:<group|gid>]
// for user flag
// FIXME: Issue from https://github.com/projectatomic/buildah/issues/66
func parseUser(rootdir, userspec string) (specs.User, error) { //nolint
var gid64 uint64
var gerr error = user.UnknownGroupError("error looking up group")
spec := strings.SplitN(userspec, ":", 2)
userspec = spec[0]
groupspec := ""
if userspec == "" {
return specs.User{}, nil
}
if len(spec) > 1 {
groupspec = spec[1]
}
uid64, uerr := strconv.ParseUint(userspec, 10, 32)
if uerr == nil && groupspec == "" {
// We parsed the user name as a number, and there's no group
// component, so we need to look up the user's primary GID.
var name string
name, gid64, gerr = lookupGroupForUIDInContainer(rootdir, uid64)
if gerr == nil {
userspec = name
} else {
if userrec, err := user.LookupId(userspec); err == nil {
gid64, gerr = strconv.ParseUint(userrec.Gid, 10, 32)
userspec = userrec.Name
}
}
}
if uerr != nil {
uid64, gid64, uerr = lookupUserInContainer(rootdir, userspec)
gerr = uerr
}
if uerr != nil {
if userrec, err := user.Lookup(userspec); err == nil {
uid64, uerr = strconv.ParseUint(userrec.Uid, 10, 32)
gid64, gerr = strconv.ParseUint(userrec.Gid, 10, 32)
}
}
if groupspec != "" {
gid64, gerr = strconv.ParseUint(groupspec, 10, 32)
if gerr != nil {
gid64, gerr = lookupGroupInContainer(rootdir, groupspec)
}
if gerr != nil {
if group, err := user.LookupGroup(groupspec); err == nil {
gid64, gerr = strconv.ParseUint(group.Gid, 10, 32)
}
}
}
if uerr == nil && gerr == nil {
u := specs.User{
UID: uint32(uid64),
GID: uint32(gid64),
Username: userspec,
}
return u, nil
}
err := errors.Wrapf(uerr, "error determining run uid")
if uerr == nil {
err = errors.Wrapf(gerr, "error determining run gid")
}
return specs.User{}, err
}
// convertKVStringsToMap converts ["key=value"] to {"key":"value"}
func convertKVStringsToMap(values []string) map[string]string {
result := make(map[string]string, len(values))
for _, value := range values {
kv := strings.SplitN(value, "=", 2)
if len(kv) == 1 {
result[kv[0]] = ""
} else {
result[kv[0]] = kv[1]
}
}
return result
}
// NsUser represents userns mode in the container.
// for userns flag
type NsUser string
// IsHost indicates whether the container uses the host's userns.
func (n NsUser) IsHost() bool {
return n == "host"
}
// IsPrivate indicates whether the container uses the a private userns.
func (n NsUser) IsPrivate() bool {
return !(n.IsHost())
}
// Valid indicates whether the userns is valid.
func (n NsUser) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host":
default:
return false
}
return true
}
// NsUts represents the UTS namespace of the container.
// for uts flag
type NsUts string
// IsPrivate indicates whether the container uses its private UTS namespace.
func (n NsUts) IsPrivate() bool {
return !(n.IsHost())
}
// IsHost indicates whether the container uses the host's UTS namespace.
func (n NsUts) IsHost() bool {
return n == "host"
}
// Valid indicates whether the UTS namespace is valid.
func (n NsUts) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host":
default:
return false
}
return true
}
// Takes a stringslice and converts to a uint32slice
func stringSlicetoUint32Slice(inputSlice []string) ([]uint32, error) {
var outputSlice []uint32
for _, v := range inputSlice {
u, err := strconv.ParseUint(v, 10, 32)
if err != nil {
return outputSlice, err
}
outputSlice = append(outputSlice, uint32(u))
}
return outputSlice, nil
}

104
cmd/kpod/run.go Normal file
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package main
import (
"fmt"
"github.com/kubernetes-incubator/cri-o/libpod"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var runDescription = "Runs a command in a new container from the given image"
var runCommand = cli.Command{
Name: "run",
Usage: "run a command in a new container",
Description: runDescription,
Flags: createFlags,
Action: runCmd,
ArgsUsage: "IMAGE [COMMAND [ARG...]]",
}
func runCmd(c *cli.Context) error {
if err := validateFlags(c, createFlags); err != nil {
return err
}
runtime, err := getRuntime(c)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
createConfig, err := parseCreateOpts(c, runtime)
if err != nil {
return err
}
createImage := runtime.NewImage(createConfig.image)
if !createImage.HasImageLocal() {
// The image wasnt found by the user input'd name or its fqname
// Pull the image
fmt.Printf("Trying to pull %s...", createImage.PullName)
createImage.Pull()
}
runtimeSpec, err := createConfigToOCISpec(createConfig)
if err != nil {
return err
}
defer runtime.Shutdown(false)
logrus.Debug("spec is ", runtimeSpec)
imageName, err := createImage.GetFQName()
if err != nil {
return err
}
logrus.Debug("imageName is ", imageName)
imageID, err := createImage.GetImageID()
if err != nil {
return err
}
logrus.Debug("imageID is ", imageID)
options, err := createConfig.GetContainerCreateOptions(c)
if err != nil {
return errors.Wrapf(err, "unable to parse new container options")
}
// Gather up the options for NewContainer which consist of With... funcs
options = append(options, libpod.WithRootFSFromImage(imageID, imageName, false))
ctr, err := runtime.NewContainer(runtimeSpec, options...)
if err != nil {
return err
}
logrus.Debug("new container created ", ctr.ID())
if err := ctr.Create(); err != nil {
return err
}
logrus.Debug("container storage created for %q", ctr.ID())
if c.String("cidfile") != "" {
libpod.WriteFile(ctr.ID(), c.String("cidfile"))
return nil
}
// Start the container
if err := ctr.Start(); err != nil {
return errors.Wrapf(err, "unable to start container %q", ctr.ID())
}
logrus.Debug("started container ", ctr.ID())
if createConfig.tty {
// Attach to the running container
logrus.Debug("trying to attach to the container %s", ctr.ID())
if err := ctr.Attach(false, c.String("detach-keys")); err != nil {
return errors.Wrapf(err, "unable to attach to container %s", ctr.ID())
}
} else {
fmt.Printf("%s\n", ctr.ID())
}
return nil
}

490
cmd/kpod/spec.go Normal file
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@ -0,0 +1,490 @@
package main
import (
"fmt"
"strings"
"github.com/kubernetes-incubator/cri-o/libpod"
ann "github.com/kubernetes-incubator/cri-o/pkg/annotations"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
"golang.org/x/sys/unix"
)
// Parses information needed to create a container into an OCI runtime spec
func createConfigToOCISpec(config *createConfig) (*spec.Spec, error) {
spec := config.GetDefaultLinuxSpec()
spec.Process.Cwd = config.workDir
spec.Process.Args = config.command
spec.Process.Terminal = config.tty
// User and Group must go together
spec.Process.User.UID = config.user
spec.Process.User.GID = config.group
spec.Process.User.AdditionalGids = config.groupAdd
spec.Process.Env = config.env
//TODO
// Need examples of capacity additions so I can load that properly
spec.Root.Readonly = config.readOnlyRootfs
spec.Hostname = config.hostname
// BIND MOUNTS
spec.Mounts = append(spec.Mounts, config.GetVolumeMounts()...)
// TMPFS MOUNTS
spec.Mounts = append(spec.Mounts, config.GetTmpfsMounts()...)
// RESOURCES - MEMORY
spec.Linux.Sysctl = config.sysctl
if config.resources.memory != 0 {
spec.Linux.Resources.Memory.Limit = &config.resources.memory
}
if config.resources.memoryReservation != 0 {
spec.Linux.Resources.Memory.Reservation = &config.resources.memoryReservation
}
if config.resources.memorySwap != 0 {
spec.Linux.Resources.Memory.Swap = &config.resources.memorySwap
}
if config.resources.kernelMemory != 0 {
spec.Linux.Resources.Memory.Kernel = &config.resources.kernelMemory
}
if config.resources.memorySwapiness != 0 {
spec.Linux.Resources.Memory.Swappiness = &config.resources.memorySwapiness
}
if config.resources.disableOomKiller {
spec.Linux.Resources.Memory.DisableOOMKiller = &config.resources.disableOomKiller
}
// RESOURCES - CPU
if config.resources.cpuShares != 0 {
spec.Linux.Resources.CPU.Shares = &config.resources.cpuShares
}
if config.resources.cpuQuota != 0 {
spec.Linux.Resources.CPU.Quota = &config.resources.cpuQuota
}
if config.resources.cpuPeriod != 0 {
spec.Linux.Resources.CPU.Period = &config.resources.cpuPeriod
}
if config.resources.cpuRtRuntime != 0 {
spec.Linux.Resources.CPU.RealtimeRuntime = &config.resources.cpuRtRuntime
}
if config.resources.cpuRtPeriod != 0 {
spec.Linux.Resources.CPU.RealtimePeriod = &config.resources.cpuRtPeriod
}
if config.resources.cpus != "" {
spec.Linux.Resources.CPU.Cpus = config.resources.cpus
}
if config.resources.cpusetMems != "" {
spec.Linux.Resources.CPU.Mems = config.resources.cpusetMems
}
// RESOURCES - PIDS
if config.resources.pidsLimit != 0 {
spec.Linux.Resources.Pids.Limit = config.resources.pidsLimit
}
/*
Capabilities: &spec.LinuxCapabilities{
// Rlimits []PosixRlimit // Where does this come from
// Type string
// Hard uint64
// Limit uint64
// NoNewPrivileges bool // No user input for this
// ApparmorProfile string // No user input for this
OOMScoreAdj: &config.resources.oomScoreAdj,
// Selinuxlabel
},
Hooks: &spec.Hooks{},
//Annotations
Resources: &spec.LinuxResources{
Devices: config.GetDefaultDevices(),
BlockIO: &blkio,
//HugepageLimits:
Network: &spec.LinuxNetwork{
// ClassID *uint32
// Priorites []LinuxInterfacePriority
},
},
//CgroupsPath:
//Namespaces: []LinuxNamespace
//Devices
Seccomp: &spec.LinuxSeccomp{
// DefaultAction:
// Architectures
// Syscalls:
},
// RootfsPropagation
// MaskedPaths
// ReadonlyPaths:
// MountLabel
// IntelRdt
},
}
*/
return &spec, nil
}
func (c *createConfig) CreateBlockIO() (spec.LinuxBlockIO, error) {
bio := spec.LinuxBlockIO{}
bio.Weight = &c.resources.blkioWeight
if len(c.resources.blkioDevice) > 0 {
var lwds []spec.LinuxWeightDevice
for _, i := range c.resources.blkioDevice {
wd, err := validateweightDevice(i)
if err != nil {
return bio, errors.Wrapf(err, "invalid values for blkio-weight-device")
}
wdStat := getStatFromPath(wd.path)
lwd := spec.LinuxWeightDevice{
Weight: &wd.weight,
}
lwd.Major = int64(unix.Major(wdStat.Rdev))
lwd.Minor = int64(unix.Minor(wdStat.Rdev))
lwds = append(lwds, lwd)
}
}
if len(c.resources.deviceReadBps) > 0 {
readBps, err := makeThrottleArray(c.resources.deviceReadBps)
if err != nil {
return bio, err
}
bio.ThrottleReadBpsDevice = readBps
}
if len(c.resources.deviceWriteBps) > 0 {
writeBpds, err := makeThrottleArray(c.resources.deviceWriteBps)
if err != nil {
return bio, err
}
bio.ThrottleWriteBpsDevice = writeBpds
}
if len(c.resources.deviceReadIops) > 0 {
readIops, err := makeThrottleArray(c.resources.deviceReadIops)
if err != nil {
return bio, err
}
bio.ThrottleReadIOPSDevice = readIops
}
if len(c.resources.deviceWriteIops) > 0 {
writeIops, err := makeThrottleArray(c.resources.deviceWriteIops)
if err != nil {
return bio, err
}
bio.ThrottleWriteIOPSDevice = writeIops
}
return bio, nil
}
func (c *createConfig) GetDefaultMounts() []spec.Mount {
// Default to 64K default per man page
shmSize := "65536k"
if c.resources.shmSize != "" {
shmSize = c.resources.shmSize
}
return []spec.Mount{
{
Destination: "/proc",
Type: "proc",
Source: "proc",
Options: []string{"nosuid", "noexec", "nodev"},
},
{
Destination: "/dev",
Type: "tmpfs",
Source: "tmpfs",
Options: []string{"nosuid", "strictatime", "mode=755", "size=65536k"},
},
{
Destination: "/dev/pts",
Type: "devpts",
Source: "devpts",
Options: []string{"nosuid", "noexec", "newinstance", "ptmxmode=0666", "mode=0620", "gid=5"},
},
{
Destination: "/sys",
Type: "sysfs",
Source: "sysfs",
Options: []string{"nosuid", "noexec", "nodev", "ro"},
},
{
Destination: "/sys/fs/cgroup",
Type: "cgroup",
Source: "cgroup",
Options: []string{"ro", "nosuid", "noexec", "nodev"},
},
{
Destination: "/dev/mqueue",
Type: "mqueue",
Source: "mqueue",
Options: []string{"nosuid", "noexec", "nodev"},
},
{
Destination: "/dev/shm",
Type: "tmpfs",
Source: "shm",
Options: []string{"nosuid", "noexec", "nodev", "mode=1777", fmt.Sprintf("size=%s", shmSize)},
},
}
}
func iPtr(i int64) *int64 { return &i }
func (c *createConfig) GetDefaultDevices() []spec.LinuxDeviceCgroup {
return []spec.LinuxDeviceCgroup{
{
Allow: false,
Access: "rwm",
},
{
Allow: true,
Type: "c",
Major: iPtr(1),
Minor: iPtr(5),
Access: "rwm",
},
{
Allow: true,
Type: "c",
Major: iPtr(1),
Minor: iPtr(3),
Access: "rwm",
},
{
Allow: true,
Type: "c",
Major: iPtr(1),
Minor: iPtr(9),
Access: "rwm",
},
{
Allow: true,
Type: "c",
Major: iPtr(1),
Minor: iPtr(8),
Access: "rwm",
},
{
Allow: true,
Type: "c",
Major: iPtr(5),
Minor: iPtr(0),
Access: "rwm",
},
{
Allow: true,
Type: "c",
Major: iPtr(5),
Minor: iPtr(1),
Access: "rwm",
},
{
Allow: false,
Type: "c",
Major: iPtr(10),
Minor: iPtr(229),
Access: "rwm",
},
}
}
func defaultCapabilities() []string {
return []string{
"CAP_CHOWN",
"CAP_DAC_OVERRIDE",
"CAP_FSETID",
"CAP_FOWNER",
"CAP_MKNOD",
"CAP_NET_RAW",
"CAP_SETGID",
"CAP_SETUID",
"CAP_SETFCAP",
"CAP_SETPCAP",
"CAP_NET_BIND_SERVICE",
"CAP_SYS_CHROOT",
"CAP_KILL",
"CAP_AUDIT_WRITE",
}
}
func (c *createConfig) GetDefaultLinuxSpec() spec.Spec {
s := spec.Spec{
Version: spec.Version,
Root: &spec.Root{},
}
s.Annotations = c.GetAnnotations()
s.Mounts = c.GetDefaultMounts()
s.Process = &spec.Process{
Capabilities: &spec.LinuxCapabilities{
Bounding: defaultCapabilities(),
Permitted: defaultCapabilities(),
Inheritable: defaultCapabilities(),
Effective: defaultCapabilities(),
},
}
s.Linux = &spec.Linux{
MaskedPaths: []string{
"/proc/kcore",
"/proc/latency_stats",
"/proc/timer_list",
"/proc/timer_stats",
"/proc/sched_debug",
},
ReadonlyPaths: []string{
"/proc/asound",
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/sys",
"/proc/sysrq-trigger",
},
Namespaces: []spec.LinuxNamespace{
{Type: "mount"},
{Type: "network"},
{Type: "uts"},
{Type: "pid"},
{Type: "ipc"},
},
Devices: []spec.LinuxDevice{},
Resources: &spec.LinuxResources{
Devices: c.GetDefaultDevices(),
},
}
return s
}
// GetAnnotations returns the all the annotations for the container
func (c *createConfig) GetAnnotations() map[string]string {
a := getDefaultAnnotations()
// TODO
// Which annotations do we want added by default
if c.tty {
a["io.kubernetes.cri-o.TTY"] = "true"
}
return a
}
func getDefaultAnnotations() map[string]string {
var annotations map[string]string
annotations = make(map[string]string)
annotations[ann.Annotations] = ""
annotations[ann.ContainerID] = ""
annotations[ann.ContainerName] = ""
annotations[ann.ContainerType] = ""
annotations[ann.Created] = ""
annotations[ann.HostName] = ""
annotations[ann.IP] = ""
annotations[ann.Image] = ""
annotations[ann.ImageName] = ""
annotations[ann.ImageRef] = ""
annotations[ann.KubeName] = ""
annotations[ann.Labels] = ""
annotations[ann.LogPath] = ""
annotations[ann.Metadata] = ""
annotations[ann.Name] = ""
annotations[ann.PrivilegedRuntime] = ""
annotations[ann.ResolvPath] = ""
annotations[ann.HostnamePath] = ""
annotations[ann.SandboxID] = ""
annotations[ann.SandboxName] = ""
annotations[ann.ShmPath] = ""
annotations[ann.MountPoint] = ""
annotations[ann.TrustedSandbox] = ""
annotations[ann.TTY] = "false"
annotations[ann.Stdin] = ""
annotations[ann.StdinOnce] = ""
annotations[ann.Volumes] = ""
return annotations
}
//GetVolumeMounts takes user provided input for bind mounts and creates Mount structs
func (c *createConfig) GetVolumeMounts() []spec.Mount {
var m []spec.Mount
var options []string
for _, i := range c.volumes {
// We need to handle SELinux options better here, specifically :Z
spliti := strings.Split(i, ":")
if len(spliti) > 2 {
options = strings.Split(spliti[2], ",")
}
// always add rbind bc mount ignores the bind filesystem when mounting
options = append(options, "rbind")
m = append(m, spec.Mount{
Destination: spliti[1],
Type: string(TypeBind),
Source: spliti[0],
Options: options,
})
}
return m
}
//GetTmpfsMounts takes user provided input for tmpfs mounts and creates Mount structs
func (c *createConfig) GetTmpfsMounts() []spec.Mount {
var m []spec.Mount
for _, i := range c.tmpfs {
// Default options if nothing passed
options := []string{"rw", "noexec", "nosuid", "nodev", "size=65536k"}
spliti := strings.Split(i, ":")
destPath := spliti[0]
if len(spliti) > 1 {
options = strings.Split(spliti[1], ",")
}
m = append(m, spec.Mount{
Destination: destPath,
Type: string(TypeTmpfs),
Options: options,
Source: string(TypeTmpfs),
})
}
return m
}
func (c *createConfig) GetContainerCreateOptions(cli *cli.Context) ([]libpod.CtrCreateOption, error) {
var options []libpod.CtrCreateOption
// Uncomment after talking to mheon about unimplemented funcs
// options = append(options, libpod.WithLabels(c.labels))
if c.interactive {
options = append(options, libpod.WithStdin())
}
if c.name != "" {
logrus.Debug("appending name %s", c.name)
options = append(options, libpod.WithName(c.name))
}
return options, nil
}
func getStatFromPath(path string) unix.Stat_t {
s := unix.Stat_t{}
_ = unix.Stat(path, &s)
return s
}
func makeThrottleArray(throttleInput []string) ([]spec.LinuxThrottleDevice, error) {
var ltds []spec.LinuxThrottleDevice
for _, i := range throttleInput {
t, err := validateBpsDevice(i)
if err != nil {
return []spec.LinuxThrottleDevice{}, err
}
ltd := spec.LinuxThrottleDevice{}
ltd.Rate = t.rate
ltdStat := getStatFromPath(t.path)
ltd.Major = int64(unix.Major(ltdStat.Rdev))
ltd.Minor = int64(unix.Major(ltdStat.Rdev))
ltds = append(ltds, ltd)
}
return ltds, nil
}

121
cmd/kpod/user.go Normal file
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@ -0,0 +1,121 @@
package main
// #include <sys/types.h>
// #include <grp.h>
// #include <pwd.h>
// #include <stdlib.h>
// #include <stdio.h>
// #include <string.h>
// typedef FILE * pFILE;
import "C"
import (
"fmt"
"os/user"
"path/filepath"
"sync"
"syscall"
"unsafe"
"github.com/pkg/errors"
)
func fopenContainerFile(rootdir, filename string) (C.pFILE, error) {
var st, lst syscall.Stat_t
ctrfile := filepath.Join(rootdir, filename)
cctrfile := C.CString(ctrfile)
defer C.free(unsafe.Pointer(cctrfile))
mode := C.CString("r")
defer C.free(unsafe.Pointer(mode))
f, err := C.fopen(cctrfile, mode)
if f == nil || err != nil {
return nil, errors.Wrapf(err, "error opening %q", ctrfile)
}
if err = syscall.Fstat(int(C.fileno(f)), &st); err != nil {
return nil, errors.Wrapf(err, "fstat(%q)", ctrfile)
}
if err = syscall.Lstat(ctrfile, &lst); err != nil {
return nil, errors.Wrapf(err, "lstat(%q)", ctrfile)
}
if st.Dev != lst.Dev || st.Ino != lst.Ino {
return nil, errors.Errorf("%q is not a regular file", ctrfile)
}
return f, nil
}
var (
lookupUser, lookupGroup sync.Mutex
)
func lookupUserInContainer(rootdir, username string) (uint64, uint64, error) {
name := C.CString(username)
defer C.free(unsafe.Pointer(name))
f, err := fopenContainerFile(rootdir, "/etc/passwd")
if err != nil {
return 0, 0, err
}
defer C.fclose(f)
lookupUser.Lock()
defer lookupUser.Unlock()
pwd := C.fgetpwent(f)
for pwd != nil {
if C.strcmp(pwd.pw_name, name) != 0 {
pwd = C.fgetpwent(f)
continue
}
return uint64(pwd.pw_uid), uint64(pwd.pw_gid), nil
}
return 0, 0, user.UnknownUserError(fmt.Sprintf("error looking up user %q", username))
}
func lookupGroupForUIDInContainer(rootdir string, userid uint64) (string, uint64, error) {
f, err := fopenContainerFile(rootdir, "/etc/passwd")
if err != nil {
return "", 0, err
}
defer C.fclose(f)
lookupUser.Lock()
defer lookupUser.Unlock()
pwd := C.fgetpwent(f)
for pwd != nil {
if uint64(pwd.pw_uid) != userid {
pwd = C.fgetpwent(f)
continue
}
return C.GoString(pwd.pw_name), uint64(pwd.pw_gid), nil
}
return "", 0, user.UnknownUserError(fmt.Sprintf("error looking up user with UID %d", userid))
}
func lookupGroupInContainer(rootdir, groupname string) (uint64, error) {
name := C.CString(groupname)
defer C.free(unsafe.Pointer(name))
f, err := fopenContainerFile(rootdir, "/etc/group")
if err != nil {
return 0, err
}
defer C.fclose(f)
lookupGroup.Lock()
defer lookupGroup.Unlock()
grp := C.fgetgrent(f)
for grp != nil {
if C.strcmp(grp.gr_name, name) != 0 {
grp = C.fgetgrent(f)
continue
}
return uint64(grp.gr_gid), nil
}
return 0, user.UnknownGroupError(fmt.Sprintf("error looking up group %q", groupname))
}

916
completions/bash/kpod
View File

@ -2,6 +2,617 @@
: ${PROG:=$(basename ${BASH_SOURCE})}
__kpod_previous_extglob_setting=$(shopt -p extglob)
shopt -s extglob
__kpod_q() {
kpod ${host:+-H "$host"} ${config:+--config "$config"} 2>/dev/null "$@"
}
# __kpod_containers returns a list of containers. Additional options to
# `kpod ps` may be specified in order to filter the list, e.g.
# `__kpod_containers --filter status=running`
# By default, only names are returned.
# Set KPOD_COMPLETION_SHOW_CONTAINER_IDS=yes to also complete IDs.
# An optional first option `--id|--name` may be used to limit the
# output to the IDs or names of matching items. This setting takes
# precedence over the environment setting.
__kpod_containers() {
local format
if [ "$1" = "--id" ] ; then
format='{{.ID}}'
shift
elif [ "$1" = "--name" ] ; then
format='{{.Names}}'
shift
elif [ "${KPOD_COMPLETION_SHOW_CONTAINER_IDS}" = yes ] ; then
format='{{.ID}} {{.Names}}'
else
format='{{.Names}}'
fi
__kpod_q ps --format "$format" "$@"
}
# __kpod_complete_containers applies completion of containers based on the current
# value of `$cur` or the value of the optional first option `--cur`, if given.
# Additional filters may be appended, see `__kpod_containers`.
__kpod_complete_containers() {
local current="$cur"
if [ "$1" = "--cur" ] ; then
current="$2"
shift 2
fi
COMPREPLY=( $(compgen -W "$(__kpod_containers "$@")" -- "$current") )
}
__kpod_complete_containers_all() {
__kpod_complete_containers "$@" --all
}
__kpod_complete_containers_running() {
__kpod_complete_containers "$@" --filter status=running
}
__kpod_complete_containers_stopped() {
__kpod_complete_containers "$@" --filter status=exited
}
__kpod_complete_containers_unpauseable() {
__kpod_complete_containers "$@" --filter status=paused
}
__kpod_complete_container_names() {
local containers=( $(__kpod_q ps -aq --no-trunc) )
local names=( $(__kpod_q inspect --format '{{.Name}}' "${containers[@]}") )
names=( "${names[@]#/}" ) # trim off the leading "/" from the container names
COMPREPLY=( $(compgen -W "${names[*]}" -- "$cur") )
}
__kpod_complete_container_ids() {
local containers=( $(__kpod_q ps -aq) )
COMPREPLY=( $(compgen -W "${containers[*]}" -- "$cur") )
}
__kpod_images() {
local images_args=""
case "$KPOD_COMPLETION_SHOW_IMAGE_IDS" in
all)
images_args="--no-trunc -a"
;;
non-intermediate)
images_args="--no-trunc"
;;
esac
local repo_print_command
if [ "${KPOD_COMPLETION_SHOW_TAGS:-yes}" = "yes" ]; then
repo_print_command='print $1; print $1":"$2'
else
repo_print_command='print $1'
fi
local awk_script
case "$KPOD_COMPLETION_SHOW_IMAGE_IDS" in
all|non-intermediate)
awk_script='NR>1 { print $3; if ($1 != "<none>") { '"$repo_print_command"' } }'
;;
none|*)
awk_script='NR>1 && $1 != "<none>" { '"$repo_print_command"' }'
;;
esac
__kpod_q images $images_args | awk "$awk_script" | grep -v '<none>$'
}
__kpod_complete_images() {
COMPREPLY=( $(compgen -W "$(__kpod_images)" -- "$cur") )
__ltrim_colon_completions "$cur"
}
__kpod_complete_image_repos() {
local repos="$(__kpod_q images | awk 'NR>1 && $1 != "<none>" { print $1 }')"
COMPREPLY=( $(compgen -W "$repos" -- "$cur") )
}
__kpod_complete_image_repos_and_tags() {
local reposAndTags="$(__kpod_q images | awk 'NR>1 && $1 != "<none>" { print $1; print $1":"$2 }')"
COMPREPLY=( $(compgen -W "$reposAndTags" -- "$cur") )
__ltrim_colon_completions "$cur"
}
# __kpod_networks returns a list of all networks. Additional options to
# `kpod network ls` may be specified in order to filter the list, e.g.
# `__kpod_networks --filter type=custom`
# By default, only names are returned.
# Set KPOD_COMPLETION_SHOW_NETWORK_IDS=yes to also complete IDs.
# An optional first option `--id|--name` may be used to limit the
# output to the IDs or names of matching items. This setting takes
# precedence over the environment setting.
__kpod_networks() {
local format
if [ "$1" = "--id" ] ; then
format='{{.ID}}'
shift
elif [ "$1" = "--name" ] ; then
format='{{.Name}}'
shift
elif [ "${KPOD_COMPLETION_SHOW_NETWORK_IDS}" = yes ] ; then
format='{{.ID}} {{.Name}}'
else
format='{{.Name}}'
fi
__kpod_q network ls --format "$format" "$@"
}
# __kpod_complete_networks applies completion of networks based on the current
# value of `$cur` or the value of the optional first option `--cur`, if given.
# Additional filters may be appended, see `__kpod_networks`.
__kpod_complete_networks() {
local current="$cur"
if [ "$1" = "--cur" ] ; then
current="$2"
shift 2
fi
COMPREPLY=( $(compgen -W "$(__kpod_networks "$@")" -- "$current") )
}
__kpod_complete_containers_in_network() {
local containers=$(__kpod_q network inspect -f '{{range $i, $c := .Containers}}{{$i}} {{$c.Name}} {{end}}' "$1")
COMPREPLY=( $(compgen -W "$containers" -- "$cur") )
}
__kpod_runtimes() {
__kpod_q info | sed -n 's/^Runtimes: \(.*\)/\1/p'
}
__kpod_complete_runtimes() {
COMPREPLY=( $(compgen -W "$(__kpod_runtimes)" -- "$cur") )
}
# __kpod_services returns a list of all services. Additional options to
# `kpod service ls` may be specified in order to filter the list, e.g.
# `__kpod_services --filter name=xxx`
# By default, only node names are returned.
# Set KPOD_COMPLETION_SHOW_SERVICE_IDS=yes to also complete IDs.
# An optional first option `--id|--name` may be used to limit the
# output to the IDs or names of matching items. This setting takes
# precedence over the environment setting.
__kpod_services() {
local fields='$2' # default: service name only
[ "${KPOD_COMPLETION_SHOW_SERVICE_IDS}" = yes ] && fields='$1,$2' # ID & name
if [ "$1" = "--id" ] ; then
fields='$1' # IDs only
shift
elif [ "$1" = "--name" ] ; then
fields='$2' # names only
shift
fi
__kpod_q service ls "$@" | awk "NR>1 {print $fields}"
}
# __kpod_complete_services applies completion of services based on the current
# value of `$cur` or the value of the optional first option `--cur`, if given.
# Additional filters may be appended, see `__kpod_services`.
__kpod_complete_services() {
local current="$cur"
if [ "$1" = "--cur" ] ; then
current="$2"
shift 2
fi
COMPREPLY=( $(compgen -W "$(__kpod_services "$@")" -- "$current") )
}
# __kpod_append_to_completions appends the word passed as an argument to every
# word in `$COMPREPLY`.
# Normally you do this with `compgen -S` while generating the completions.
# This function allows you to append a suffix later. It allows you to use
# the __kpod_complete_XXX functions in cases where you need a suffix.
__kpod_append_to_completions() {
COMPREPLY=( ${COMPREPLY[@]/%/"$1"} )
}
# __kpod_is_experimental tests whether the currently configured Kpod daemon
# runs in experimental mode. If so, the function exits with 0 (true).
# Otherwise, or if the result cannot be determined, the exit value is 1 (false).
__kpod_is_experimental() {
[ "$(__kpod_q version -f '{{.Server.Experimental}}')" = "true" ]
}
# __kpod_pos_first_nonflag finds the position of the first word that is neither
# option nor an option's argument. If there are options that require arguments,
# you should pass a glob describing those options, e.g. "--option1|-o|--option2"
# Use this function to restrict completions to exact positions after the argument list.
__kpod_pos_first_nonflag() {
local argument_flags=$1
local counter=$((${subcommand_pos:-${command_pos}} + 1))
while [ $counter -le $cword ]; do
if [ -n "$argument_flags" ] && eval "case '${words[$counter]}' in $argument_flags) true ;; *) false ;; esac"; then
(( counter++ ))
# eat "=" in case of --option=arg syntax
[ "${words[$counter]}" = "=" ] && (( counter++ ))
else
case "${words[$counter]}" in
-*)
;;
*)
break
;;
esac
fi
# Bash splits words at "=", retaining "=" as a word, examples:
# "--debug=false" => 3 words, "--log-opt syslog-facility=daemon" => 4 words
while [ "${words[$counter + 1]}" = "=" ] ; do
counter=$(( counter + 2))
done
(( counter++ ))
done
echo $counter
}
# __kpod_map_key_of_current_option returns `key` if we are currently completing the
# value of a map option (`key=value`) which matches the extglob given as an argument.
# This function is needed for key-specific completions.
__kpod_map_key_of_current_option() {
local glob="$1"
local key glob_pos
if [ "$cur" = "=" ] ; then # key= case
key="$prev"
glob_pos=$((cword - 2))
elif [[ $cur == *=* ]] ; then # key=value case (OSX)
key=${cur%=*}
glob_pos=$((cword - 1))
elif [ "$prev" = "=" ] ; then
key=${words[$cword - 2]} # key=value case
glob_pos=$((cword - 3))
else
return
fi
[ "${words[$glob_pos]}" = "=" ] && ((glob_pos--)) # --option=key=value syntax
[[ ${words[$glob_pos]} == @($glob) ]] && echo "$key"
}
# __kpod_value_of_option returns the value of the first option matching `option_glob`.
# Valid values for `option_glob` are option names like `--log-level` and globs like
# `--log-level|-l`
# Only positions between the command and the current word are considered.
__kpod_value_of_option() {
local option_extglob=$(__kpod_to_extglob "$1")
local counter=$((command_pos + 1))
while [ $counter -lt $cword ]; do
case ${words[$counter]} in
$option_extglob )
echo ${words[$counter + 1]}
break
;;
esac
(( counter++ ))
done
}
# __kpod_to_alternatives transforms a multiline list of strings into a single line
# string with the words separated by `|`.
# This is used to prepare arguments to __kpod_pos_first_nonflag().
__kpod_to_alternatives() {
local parts=( $1 )
local IFS='|'
echo "${parts[*]}"
}
# __kpod_to_extglob transforms a multiline list of options into an extglob pattern
# suitable for use in case statements.
__kpod_to_extglob() {
local extglob=$( __kpod_to_alternatives "$1" )
echo "@($extglob)"
}
# __kpod_subcommands processes subcommands
# Locates the first occurrence of any of the subcommands contained in the
# first argument. In case of a match, calls the corresponding completion
# function and returns 0.
# If no match is found, 1 is returned. The calling function can then
# continue processing its completion.
#
# TODO if the preceding command has options that accept arguments and an
# argument is equal ot one of the subcommands, this is falsely detected as
# a match.
__kpod_subcommands() {
local subcommands="$1"
local counter=$(($command_pos + 1))
while [ $counter -lt $cword ]; do
case "${words[$counter]}" in
$(__kpod_to_extglob "$subcommands") )
subcommand_pos=$counter
local subcommand=${words[$counter]}
local completions_func=_kpod_${command}_${subcommand}
declare -F $completions_func >/dev/null && $completions_func
return 0
;;
esac
(( counter++ ))
done
return 1
}
# __kpod_nospace suppresses trailing whitespace
__kpod_nospace() {
# compopt is not available in ancient bash versions
type compopt &>/dev/null && compopt -o nospace
}
__kpod_complete_resolved_hostname() {
command -v host >/dev/null 2>&1 || return
COMPREPLY=( $(host 2>/dev/null "${cur%:}" | awk '/has address/ {print $4}') )
}
__kpod_local_interfaces() {
command -v ip >/dev/null 2>&1 || return
ip addr show scope global 2>/dev/null | sed -n 's| \+inet \([0-9.]\+\).* \([^ ]\+\)|\1 \2|p'
}
__kpod_complete_local_interfaces() {
local additional_interface
if [ "$1" = "--add" ] ; then
additional_interface="$2"
fi
COMPREPLY=( $( compgen -W "$(__kpod_local_interfaces) $additional_interface" -- "$cur" ) )
}
__kpod_complete_capabilities() {
# The list of capabilities is defined in types.go, ALL was added manually.
COMPREPLY=( $( compgen -W "
ALL
AUDIT_CONTROL
AUDIT_WRITE
AUDIT_READ
BLOCK_SUSPEND
CHOWN
DAC_OVERRIDE
DAC_READ_SEARCH
FOWNER
FSETID
IPC_LOCK
IPC_OWNER
KILL
LEASE
LINUX_IMMUTABLE
MAC_ADMIN
MAC_OVERRIDE
MKNOD
NET_ADMIN
NET_BIND_SERVICE
NET_BROADCAST
NET_RAW
SETFCAP
SETGID
SETPCAP
SETUID
SYS_ADMIN
SYS_BOOT
SYS_CHROOT
SYSLOG
SYS_MODULE
SYS_NICE
SYS_PACCT
SYS_PTRACE
SYS_RAWIO
SYS_RESOURCE
SYS_TIME
SYS_TTY_CONFIG
WAKE_ALARM
" -- "$cur" ) )
}
__kpod_complete_detach-keys() {
case "$prev" in
--detach-keys)
case "$cur" in
*,)
COMPREPLY=( $( compgen -W "${cur}ctrl-" -- "$cur" ) )
;;
*)
COMPREPLY=( $( compgen -W "ctrl-" -- "$cur" ) )
;;
esac
__kpod_nospace
return
;;
esac
return 1
}
__kpod_complete_log_drivers() {
COMPREPLY=( $( compgen -W "
awslogs
etwlogs
fluentd
gcplogs
gelf
journald
json-file
logentries
none
splunk
syslog
" -- "$cur" ) )
}
__kpod_complete_log_options() {
# see docs/reference/logging/index.md
local awslogs_options="awslogs-region awslogs-group awslogs-stream"
local fluentd_options="env fluentd-address fluentd-async-connect fluentd-buffer-limit fluentd-retry-wait fluentd-max-retries labels tag"
local gcplogs_options="env gcp-log-cmd gcp-project labels"
local gelf_options="env gelf-address gelf-compression-level gelf-compression-type labels tag"
local journald_options="env labels tag"
local json_file_options="env labels max-file max-size"
local logentries_options="logentries-token"
local syslog_options="env labels syslog-address syslog-facility syslog-format syslog-tls-ca-cert syslog-tls-cert syslog-tls-key syslog-tls-skip-verify tag"
local splunk_options="env labels splunk-caname splunk-capath splunk-format splunk-gzip splunk-gzip-level splunk-index splunk-insecureskipverify splunk-source splunk-sourcetype splunk-token splunk-url splunk-verify-connection tag"
local all_options="$fluentd_options $gcplogs_options $gelf_options $journald_options $logentries_options $json_file_options $syslog_options $splunk_options"
case $(__kpod_value_of_option --log-driver) in
'')
COMPREPLY=( $( compgen -W "$all_options" -S = -- "$cur" ) )
;;
awslogs)
COMPREPLY=( $( compgen -W "$awslogs_options" -S = -- "$cur" ) )
;;
fluentd)
COMPREPLY=( $( compgen -W "$fluentd_options" -S = -- "$cur" ) )
;;
gcplogs)
COMPREPLY=( $( compgen -W "$gcplogs_options" -S = -- "$cur" ) )
;;
gelf)
COMPREPLY=( $( compgen -W "$gelf_options" -S = -- "$cur" ) )
;;
journald)
COMPREPLY=( $( compgen -W "$journald_options" -S = -- "$cur" ) )
;;
json-file)
COMPREPLY=( $( compgen -W "$json_file_options" -S = -- "$cur" ) )
;;
logentries)
COMPREPLY=( $( compgen -W "$logentries_options" -S = -- "$cur" ) )
;;
syslog)
COMPREPLY=( $( compgen -W "$syslog_options" -S = -- "$cur" ) )
;;
splunk)
COMPREPLY=( $( compgen -W "$splunk_options" -S = -- "$cur" ) )
;;
*)
return
;;
esac
__kpod_nospace
}
__kpod_complete_log_driver_options() {
local key=$(__kpod_map_key_of_current_option '--log-opt')
case "$key" in
fluentd-async-connect)
COMPREPLY=( $( compgen -W "false true" -- "${cur##*=}" ) )
return
;;
gelf-address)
COMPREPLY=( $( compgen -W "udp" -S "://" -- "${cur##*=}" ) )
__kpod_nospace
return
;;
gelf-compression-level)
COMPREPLY=( $( compgen -W "1 2 3 4 5 6 7 8 9" -- "${cur##*=}" ) )
return
;;
gelf-compression-type)
COMPREPLY=( $( compgen -W "gzip none zlib" -- "${cur##*=}" ) )
return
;;
syslog-address)
COMPREPLY=( $( compgen -W "tcp:// tcp+tls:// udp:// unix://" -- "${cur##*=}" ) )
__kpod_nospace
__ltrim_colon_completions "${cur}"
return
;;
syslog-facility)
COMPREPLY=( $( compgen -W "
auth
authpriv
cron
daemon
ftp
kern
local0
local1
local2
local3
local4
local5
local6
local7
lpr
mail
news
syslog
user
uucp
" -- "${cur##*=}" ) )
return
;;
syslog-format)
COMPREPLY=( $( compgen -W "rfc3164 rfc5424 rfc5424micro" -- "${cur##*=}" ) )
return
;;
syslog-tls-ca-cert|syslog-tls-cert|syslog-tls-key)
_filedir
return
;;
syslog-tls-skip-verify)
COMPREPLY=( $( compgen -W "true" -- "${cur##*=}" ) )
return
;;
splunk-url)
COMPREPLY=( $( compgen -W "http:// https://" -- "${cur##*=}" ) )
__kpod_nospace
__ltrim_colon_completions "${cur}"
return
;;
splunk-gzip|splunk-insecureskipverify|splunk-verify-connection)
COMPREPLY=( $( compgen -W "false true" -- "${cur##*=}" ) )
return
;;
splunk-format)
COMPREPLY=( $( compgen -W "inline json raw" -- "${cur##*=}" ) )
return
;;
esac
return 1
}
__kpod_complete_log_levels() {
COMPREPLY=( $( compgen -W "debug info warn error fatal" -- "$cur" ) )
}
# __kpod_complete_signals returns a subset of the available signals that is most likely
# relevant in the context of kpod containers
__kpod_complete_signals() {
local signals=(
SIGCONT
SIGHUP
SIGINT
SIGKILL
SIGQUIT
SIGSTOP
SIGTERM
SIGUSR1
SIGUSR2
)
COMPREPLY=( $( compgen -W "${signals[*]} ${signals[*]#SIG}" -- "$( echo $cur | tr '[:lower:]' '[:upper:]')" ) )
}
__kpod_complete_user_group() {
if [[ $cur == *:* ]] ; then
COMPREPLY=( $(compgen -g -- "${cur#*:}") )
else
COMPREPLY=( $(compgen -u -S : -- "$cur") )
__kpod_nospace
fi
}
__kpod_list_images() {
COMPREPLY=($(compgen -W "$(kpod images -q)" -- $cur))
}
@ -10,6 +621,38 @@ __kpod_list_containers() {
COMPREPLY=($(compgen -W "$(kpod ps -aq)" -- $cur))
}
__kpod_images() {
local images_args=""
case "$KPOD_COMPLETION_SHOW_IMAGE_IDS" in
all)
images_args="--no-trunc -a"
;;
non-intermediate)
images_args="--no-trunc"
;;
esac
local repo_print_command
if [ "${KPOD_COMPLETION_SHOW_TAGS:-yes}" = "yes" ]; then
repo_print_command='print $1; print $1":"$2'
else
repo_print_command='print $1'
fi
local awk_script
case "$KPOD_COMPLETION_SHOW_IMAGE_IDS" in
all|non-intermediate)
awk_script='NR>1 { print $3; if ($1 != "<none>") { '"$repo_print_command"' } }'
;;
none|*)
awk_script='NR>1 && $1 != "<none>" { '"$repo_print_command"' }'
;;
esac
__kpod_q images $images_args | awk "$awk_script" | grep -v '<none>$'
}
_kpod_diff() {
local options_with_args="
--format
@ -273,6 +916,277 @@ _kpod_rename() {
esac
}
_kpod_container_run() {
local options_with_args="
--add-host
--attach -a
--blkio-weight
--blkio-weight-device
--cap-add
--cap-drop
--cgroup-parent
--cidfile
--cpu-period
--cpu-quota
--cpu-rt-period
--cpu-rt-runtime
--cpuset-cpus
--cpus
--cpuset-mems
--cpu-shares -c
--device
--device-read-bps
--device-read-iops
--device-write-bps
--device-write-iops
--dns
--dns-option
--dns-search
--entrypoint
--env -e
--env-file
--expose
--group-add
--hostname -h
--init-path
--ip
--ip6
--ipc
--kernel-memory
--label-file
--label -l
--link-local-ip
--log-driver
--log-opt
--mac-address
--memory -m
--memory-swap
--memory-swappiness
--memory-reservation
--name
--network
--network-alias
--oom-score-adj
--pid
--pids-limit
--publish -p
--runtime
--security-opt
--shm-size
--stop-signal
--stop-timeout
--storage-opt
--tmpfs
--sysctl
--ulimit
--user -u
--userns
--uts
--volumes-from
--volume -v
--workdir -w
"
local boolean_options="
--disable-content-trust=false
--help
--init
--interactive -i
--oom-kill-disable
--privileged
--publish-all -P
--read-only
--tty -t
"
if [ "$command" = "run" -o "$subcommand" = "run" ] ; then
options_with_args="$options_with_args
--detach-keys
--health-cmd
--health-interval
--health-retries
--health-timeout
"
boolean_options="$boolean_options
--detach -d
--no-healthcheck
--rm
--sig-proxy=false
"
__kpod_complete_detach-keys && return
fi
local all_options="$options_with_args $boolean_options"
__kpod_complete_log_driver_options && return
local key=$(__kpod_map_key_of_current_option '--security-opt')
case "$key" in
label)
[[ $cur == *: ]] && return
COMPREPLY=( $( compgen -W "user: role: type: level: disable" -- "${cur##*=}") )
if [ "${COMPREPLY[*]}" != "disable" ] ; then
__kpod_nospace
fi
return
;;
seccomp)
local cur=${cur##*=}
_filedir
COMPREPLY+=( $( compgen -W "unconfined" -- "$cur" ) )
return
;;
esac
case "$prev" in
--add-host)
case "$cur" in
*:)
__kpod_complete_resolved_hostname
return
;;
esac
;;
--attach|-a)
COMPREPLY=( $( compgen -W 'stdin stdout stderr' -- "$cur" ) )
return
;;
--cap-add|--cap-drop)
__kpod_complete_capabilities
return
;;
--cidfile|--env-file|--init-path|--label-file)
_filedir
return
;;
--device|--tmpfs|--volume|-v)
case "$cur" in
*:*)
# TODO somehow do _filedir for stuff inside the image, if it's already specified (which is also somewhat difficult to determine)
;;
'')
COMPREPLY=( $( compgen -W '/' -- "$cur" ) )
__kpod_nospace
;;
/*)
_filedir
__kpod_nospace
;;
esac
return
;;
--env|-e)
# we do not append a "=" here because "-e VARNAME" is legal systax, too
COMPREPLY=( $( compgen -e -- "$cur" ) )
__kpod_nospace
return
;;
--ipc)
case "$cur" in
*:*)
cur="${cur#*:}"
__kpod_complete_containers_running
;;
*)
COMPREPLY=( $( compgen -W 'host container:' -- "$cur" ) )
if [ "$COMPREPLY" = "container:" ]; then
__kpod_nospace
fi
;;
esac
return
;;
--log-driver)
__kpod_complete_log_drivers
return
;;
--log-opt)
__kpod_complete_log_options
return
;;
--network)
case "$cur" in
container:*)
__kpod_complete_containers_all --cur "${cur#*:}"
;;
*)
COMPREPLY=( $( compgen -W "$(__kpod_plugins_bundled --type Network) $(__kpod_networks) container:" -- "$cur") )
if [ "${COMPREPLY[*]}" = "container:" ] ; then
__kpod_nospace
fi
;;
esac
return
;;
--pid)
case "$cur" in
*:*)
__kpod_complete_containers_running --cur "${cur#*:}"
;;
*)
COMPREPLY=( $( compgen -W 'host container:' -- "$cur" ) )
if [ "$COMPREPLY" = "container:" ]; then
__kpod_nospace
fi
;;
esac
return
;;
--runtime)
__kpod_complete_runtimes
return
;;
--security-opt)
COMPREPLY=( $( compgen -W "apparmor= label= no-new-privileges seccomp=" -- "$cur") )
if [ "${COMPREPLY[*]}" != "no-new-privileges" ] ; then
__kpod_nospace
fi
return
;;
--storage-opt)
COMPREPLY=( $( compgen -W "size" -S = -- "$cur") )
__kpod_nospace
return
;;
--user|-u)
__kpod_complete_user_group
return
;;
--userns)
COMPREPLY=( $( compgen -W "host" -- "$cur" ) )
return
;;
--volumes-from)
__kpod_complete_containers_all
return
;;
$(__kpod_to_extglob "$options_with_args") )
return
;;
esac
case "$cur" in
-*)
COMPREPLY=( $( compgen -W "$all_options" -- "$cur" ) )
;;
*)
local counter=$( __kpod_pos_first_nonflag $( __kpod_to_alternatives "$options_with_args" ) )
if [ $cword -eq $counter ]; then
__kpod_complete_images
fi
;;
esac
}
_kpod_create() {
_kpod_container_run
}
_kpod_run() {
_kpod_container_run
}
_kpod_rm() {
local boolean_options="
--force
@ -483,6 +1397,7 @@ _kpod_kpod() {
--version -v
"
commands="
create
diff
export
history
@ -502,6 +1417,7 @@ _kpod_kpod() {
rename
rm
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% kpod(1) kpod-create - Create a new container
% Dan Walsh
kpod-create - Create a new container
# SYNOPSIS
**kpod create** [*options* [...]] IMAGE [COMMAND] [ARG...]
# DESCRIPTION
Creates a writeable container layer over the specified image and prepares it for
running the specified command. The container ID is then printed to STDOUT. This
is similar to **kpod run -d** except the container is never started. You can
then use the **kpod start <container_id>** command to start the container at
any point.
The initial status of the container created with **kpod create** is 'created'.
# OPTIONS
**--add-host**=[]
Add a custom host-to-IP mapping (host:ip)
Add a line to /etc/hosts. The format is hostname:ip. The **--add-host**
option can be set multiple times.
**-a**, **--attach**=[]
Attach to STDIN, STDOUT or STDERR.
In foreground mode (the default when **-d**
is not specified), **kpod run** can start the process in the container
and attach the console to the process's standard input, output, and standard
error. It can even pretend to be a TTY (this is what most commandline
executables expect) and pass along signals. The **-a** option can be set for
each of stdin, stdout, and stderr.
**--blkio-weight**=*0*
Block IO weight (relative weight) accepts a weight value between 10 and 1000.
**--blkio-weight-device**=[]
Block IO weight (relative device weight, format: `DEVICE_NAME:WEIGHT`).
**--cap-add**=[]
Add Linux capabilities
**--cap-drop**=[]
Drop Linux capabilities
**--cgroup-parent**=""
Path to cgroups under which the cgroup for the container will be created. If the path is not absolute, the path is considered to be relative to the cgroups path of the init process. Cgroups will be created if they do not already exist.
**--cidfile**=""
Write the container ID to the file
**--cpu-count**=*0*
Limit the number of CPUs available for execution by the container.
On Windows Server containers, this is approximated as a percentage of total CPU usage.
On Windows Server containers, the processor resource controls are mutually exclusive, the order of precedence is CPUCount first, then CPUShares, and CPUPercent last.
**--cpu-period**=*0*
Limit the CPU CFS (Completely Fair Scheduler) period
Limit the container's CPU usage. This flag tell the kernel to restrict the container's CPU usage to the period you specify.
**--cpu-quota**=*0*
Limit the CPU CFS (Completely Fair Scheduler) quota
Limit the container's CPU usage. By default, containers run with the full
CPU resource. This flag tell the kernel to restrict the container's CPU usage
to the quota you specify.
**--cpu-rt-period**=0
Limit the CPU real-time period in microseconds
Limit the container's Real Time CPU usage. This flag tell the kernel to restrict the container's Real Time CPU usage to the period you specify.
**--cpu-rt-runtime**=0
Limit the CPU real-time runtime in microseconds
Limit the containers Real Time CPU usage. This flag tells the kernel to limit the amount of time in a given CPU period Real Time tasks may consume. Ex:
Period of 1,000,000us and Runtime of 950,000us means that this container could consume 95% of available CPU and leave the remaining 5% to normal priority tasks.
The sum of all runtimes across containers cannot exceed the amount allotted to the parent cgroup.
**--cpu-shares**=*0*
CPU shares (relative weight)
By default, all containers get the same proportion of CPU cycles. This proportion
can be modified by changing the container's CPU share weighting relative
to the weighting of all other running containers.
To modify the proportion from the default of 1024, use the **--cpu-shares**
flag to set the weighting to 2 or higher.
The proportion will only apply when CPU-intensive processes are running.
When tasks in one container are idle, other containers can use the
left-over CPU time. The actual amount of CPU time will vary depending on
the number of containers running on the system.
For example, consider three containers, one has a cpu-share of 1024 and
two others have a cpu-share setting of 512. When processes in all three
containers attempt to use 100% of CPU, the first container would receive
50% of the total CPU time. If you add a fourth container with a cpu-share
of 1024, the first container only gets 33% of the CPU. The remaining containers
receive 16.5%, 16.5% and 33% of the CPU.
On a multi-core system, the shares of CPU time are distributed over all CPU
cores. Even if a container is limited to less than 100% of CPU time, it can
use 100% of each individual CPU core.
For example, consider a system with more than three cores. If you start one
container **{C0}** with **-c=512** running one process, and another container
**{C1}** with **-c=1024** running two processes, this can result in the following
division of CPU shares:
PID container CPU CPU share
100 {C0} 0 100% of CPU0
101 {C1} 1 100% of CPU1
102 {C1} 2 100% of CPU2
**--cpus**=0.0
Number of CPUs. The default is *0.0* which means no limit.
**--cpuset-cpus**=""
CPUs in which to allow execution (0-3, 0,1)
**--cpuset-mems**=""
Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only effective on NUMA systems.
If you have four memory nodes on your system (0-3), use `--cpuset-mems=0,1`
then processes in your container will only use memory from the first
two memory nodes.
**-d**, **--detach**=*true*|*false*
Detached mode: run the container in the background and print the new container ID. The default is *false*.
At any time you can run **kpod ps** in
the other shell to view a list of the running containers. You can reattach to a
detached container with **kpod attach**. If you choose to run a container in
the detached mode, then you cannot use the **-rm** option.
When attached in the tty mode, you can detach from the container (and leave it
running) using a configurable key sequence. The default sequence is `CTRL-p CTRL-q`.
You configure the key sequence using the **--detach-keys** option or a configuration file.
See **config-json(5)** for documentation on using a configuration file.
**--detach-keys**=""
Override the key sequence for detaching a container. Format is a single character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`, `@`, `^`, `[`, `,` or `_`.
**--device**=[]
Add a host device to the container (e.g. --device=/dev/sdc:/dev/xvdc:rwm)
**--device-read-bps**=[]
Limit read rate (bytes per second) from a device (e.g. --device-read-bps=/dev/sda:1mb)
**--device-read-iops**=[]
Limit read rate (IO per second) from a device (e.g. --device-read-iops=/dev/sda:1000)
**--device-write-bps**=[]
Limit write rate (bytes per second) to a device (e.g. --device-write-bps=/dev/sda:1mb)
**--device-write-iops**=[]
Limit write rate (IO per second) to a device (e.g. --device-write-iops=/dev/sda:1000)
**--dns**=[]
Set custom DNS servers
This option can be used to override the DNS
configuration passed to the container. Typically this is necessary when the
host DNS configuration is invalid for the container (e.g., 127.0.0.1). When this
is the case the **--dns** flags is necessary for every run.
**--dns-option**=[]
Set custom DNS options
**--dns-search**=[]
Set custom DNS search domains (Use --dns-search=. if you don't wish to set the search domain)
**--entrypoint**=""
Overwrite the default ENTRYPOINT of the image
This option allows you to overwrite the default entrypoint of the image.
The ENTRYPOINT of an image is similar to a COMMAND
because it specifies what executable to run when the container starts, but it is
(purposely) more difficult to override. The ENTRYPOINT gives a container its
default nature or behavior, so that when you set an ENTRYPOINT you can run the
container as if it were that binary, complete with default options, and you can
pass in more options via the COMMAND. But, sometimes an operator may want to run
something else inside the container, so you can override the default ENTRYPOINT
at runtime by using a **--entrypoint** and a string to specify the new
ENTRYPOINT.
**-e**, **--env**=[]
Set environment variables
This option allows you to specify arbitrary
environment variables that are available for the process that will be launched
inside of the container.
**--env-file**=[]
Read in a line delimited file of environment variables
**--expose**=[]
Expose a port, or a range of ports (e.g. --expose=3300-3310) to set up port redirection
on the host system.
**--group-add**=[]
Add additional groups to run as
**--hostname**=""
Container host name
Sets the container host name that is available inside the container.
**--help**
Print usage statement
**-i**, **--interactive**=*true*|*false*
Keep STDIN open even if not attached. The default is *false*.
**--ip**=""
Sets the container's interface IPv4 address (e.g. 172.23.0.9)
It can only be used in conjunction with **--network** for user-defined networks
**--ip6**=""
Sets the container's interface IPv6 address (e.g. 2001:db8::1b99)
It can only be used in conjunction with **--network** for user-defined networks
**--ipc**=""
Default is to create a private IPC namespace (POSIX SysV IPC) for the container
'container:<name|id>': reuses another container shared memory, semaphores and message queues
'host': use the host shared memory,semaphores and message queues inside the container. Note: the host mode gives the container full access to local shared memory and is therefore considered insecure.
**--kernel-memory**=""
Kernel memory limit (format: `<number>[<unit>]`, where unit = b, k, m or g)
Constrains the kernel memory available to a container. If a limit of 0
is specified (not using `--kernel-memory`), the container's kernel memory
is not limited. If you specify a limit, it may be rounded up to a multiple
of the operating system's page size and the value can be very large,
millions of trillions.
**-l**, **--label**=[]
Add metadata to a container (e.g., --label com.example.key=value)
**--label-file**=[]
Read in a line delimited file of labels
**--link-local-ip**=[]
Add one or more link-local IPv4/IPv6 addresses to the container's interface
**--log-driver**="*json-file*|*syslog*|*journald*|*gelf*|*fluentd*|*awslogs*|*splunk*|*etwlogs*|*gcplogs*|*none*"
Logging driver for the container. Default is defined by daemon `--log-driver` flag.
**Warning**: the `kpod logs` command works only for the `json-file` and
`journald` logging drivers.
**--log-opt**=[]
Logging driver specific options.
**--mac-address**=""
Container MAC address (e.g. 92:d0:c6:0a:29:33)
Remember that the MAC address in an Ethernet network must be unique.
The IPv6 link-local address will be based on the device's MAC address
according to RFC4862.
**-m**, **--memory**=""
Memory limit (format: <number>[<unit>], where unit = b, k, m or g)
Allows you to constrain the memory available to a container. If the host
supports swap memory, then the **-m** memory setting can be larger than physical
RAM. If a limit of 0 is specified (not using **-m**), the container's memory is
not limited. The actual limit may be rounded up to a multiple of the operating
system's page size (the value would be very large, that's millions of trillions).
**--memory-reservation**=""
Memory soft limit (format: <number>[<unit>], where unit = b, k, m or g)
After setting memory reservation, when the system detects memory contention
or low memory, containers are forced to restrict their consumption to their
reservation. So you should always set the value below **--memory**, otherwise the
hard limit will take precedence. By default, memory reservation will be the same
as memory limit.
**--memory-swap**="LIMIT"
A limit value equal to memory plus swap. Must be used with the **-m**
(**--memory**) flag. The swap `LIMIT` should always be larger than **-m**
(**--memory**) value. By default, the swap `LIMIT` will be set to double
the value of --memory.
The format of `LIMIT` is `<number>[<unit>]`. Unit can be `b` (bytes),
`k` (kilobytes), `m` (megabytes), or `g` (gigabytes). If you don't specify a
unit, `b` is used. Set LIMIT to `-1` to enable unlimited swap.
**--memory-swappiness**=""
Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
**--name**=""
Assign a name to the container
The operator can identify a container in three ways:
UUID long identifier (“f78375b1c487e03c9438c729345e54db9d20cfa2ac1fc3494b6eb60872e74778”)
UUID short identifier (“f78375b1c487”)
Name (“jonah”)
kpod generates a UUID for each container, and if a name is not assigned
to the container with **--name** then the daemon will also generate a random
string name. The name is useful when defining links (see **--link**) (or any
other place you need to identify a container). This works for both background
and foreground containers.
**--network**="*bridge*"
Set the Network mode for the container
'bridge': create a network stack on the default bridge
'none': no networking
'container:<name|id>': reuse another container's network stack
'host': use the kpod host network stack. Note: the host mode gives the container full access to local system services such as D-bus and is therefore considered insecure.
'<network-name>|<network-id>': connect to a user-defined network
**--network-alias**=[]
Add network-scoped alias for the container
**--oom-kill-disable**=*true*|*false*
Whether to disable OOM Killer for the container or not.
**--oom-score-adj**=""
Tune the host's OOM preferences for containers (accepts -1000 to 1000)
**--pid**=""
Set the PID mode for the container
Default is to create a private PID namespace for the container
'container:<name|id>': join another container's PID namespace
'host': use the host's PID namespace for the container. Note: the host mode gives the container full access to local PID and is therefore considered insecure.
**--pids-limit**=""
Tune the container's pids limit. Set `-1` to have unlimited pids for the container.
**--pod**=""
Run container in an existing pod
**--privileged**=*true*|*false*
Give extended privileges to this container. The default is *false*.
By default, kpod containers are
“unprivileged” (=false) and cannot, for example, modify parts of the kernel.
This is because by default a container is not allowed to access any devices.
A “privileged” container is given access to all devices.
When the operator executes **kpod run --privileged**, kpod enables access
to all devices on the host as well as set turn off most of the security messurs
protecting the host from the container.
**-p**, **--publish**=[]
Publish a container's port, or range of ports, to the host
Format: `ip:hostPort:containerPort | ip::containerPort | hostPort:containerPort | containerPort`
Both hostPort and containerPort can be specified as a range of ports.
When specifying ranges for both, the number of container ports in the range must match the number of host ports in the range.
(e.g., `kpod run -p 1234-1236:1222-1224 --name thisWorks -t busybox`
but not `kpod run -p 1230-1236:1230-1240 --name RangeContainerPortsBiggerThanRangeHostPorts -t busybox`)
With ip: `kpod run -p 127.0.0.1:$HOSTPORT:$CONTAINERPORT --name CONTAINER -t someimage`
Use `kpod port` to see the actual mapping: `kpod port CONTAINER $CONTAINERPORT`
**-P**, **--publish-all**=*true*|*false*
Publish all exposed ports to random ports on the host interfaces. The default is *false*.
When set to true publish all exposed ports to the host interfaces. The
default is false. If the operator uses -P (or -p) then kpod will make the
exposed port accessible on the host and the ports will be available to any
client that can reach the host. When using -P, kpod will bind any exposed
port to a random port on the host within an *ephemeral port range* defined by
`/proc/sys/net/ipv4/ip_local_port_range`. To find the mapping between the host
ports and the exposed ports, use `kpod port`.
**--read-only**=*true*|*false*
Mount the container's root filesystem as read only.
By default a container will have its root filesystem writable allowing processes
to write files anywhere. By specifying the `--read-only` flag the container will have
its root filesystem mounted as read only prohibiting any writes.
**--rm**=*true*|*false*
Automatically remove the container when it exits. The default is *false*.
`--rm` flag can work together with `-d`, and auto-removal will be done on daemon side. Note that it's
incompatible with any restart policy other than `none`.
**--security-opt**=[]
Security Options
"label=user:USER" : Set the label user for the container
"label=role:ROLE" : Set the label role for the container
"label=type:TYPE" : Set the label type for the container
"label=level:LEVEL" : Set the label level for the container
"label=disable" : Turn off label confinement for the container
"no-new-privileges" : Disable container processes from gaining additional privileges
"seccomp=unconfined" : Turn off seccomp confinement for the container
"seccomp=profile.json : White listed syscalls seccomp Json file to be used as a seccomp filter
"apparmor=unconfined" : Turn off apparmor confinement for the container
"apparmor=your-profile" : Set the apparmor confinement profile for the container
**--shm-size**=""
Size of `/dev/shm`. The format is `<number><unit>`. `number` must be greater than `0`.
Unit is optional and can be `b` (bytes), `k` (kilobytes), `m`(megabytes), or `g` (gigabytes).
If you omit the unit, the system uses bytes. If you omit the size entirely, the system uses `64m`.
**--sig-proxy**=*true*|*false*
Proxy received signals to the process (non-TTY mode only). SIGCHLD, SIGSTOP, and SIGKILL are not proxied. The default is *true*.
**--stop-signal**=*SIGTERM*
Signal to stop a container. Default is SIGTERM.
**--stop-timeout**=*10*
Timeout (in seconds) to stop a container. Default is 10.
**--storage-opt**=[]
Storage driver options per container
$ kpod create -it --storage-opt size=120G fedora /bin/bash
This (size) will allow to set the container rootfs size to 120G at creation time.
This option is only available for the `devicemapper`, `btrfs`, `overlay2` and `zfs` graph drivers.
For the `devicemapper`, `btrfs` and `zfs` storage drivers, user cannot pass a size less than the Default BaseFS Size.
For the `overlay2` storage driver, the size option is only available if the backing fs is `xfs` and mounted with the `pquota` mount option.
Under these conditions, user can pass any size less then the backing fs size.
**--sysctl**=SYSCTL
Configure namespaced kernel parameters at runtime
IPC Namespace - current sysctls allowed:
kernel.msgmax, kernel.msgmnb, kernel.msgmni, kernel.sem, kernel.shmall, kernel.shmmax, kernel.shmmni, kernel.shm_rmid_forced
Sysctls beginning with fs.mqueue.*
Note: if you use the --ipc=host option these sysctls will not be allowed.
Network Namespace - current sysctls allowed:
Sysctls beginning with net.*
Note: if you use the --network=host option these sysctls will not be allowed.
**--tmpfs**=[] Create a tmpfs mount
Mount a temporary filesystem (`tmpfs`) mount into a container, for example:
$ kpod run -d --tmpfs /tmp:rw,size=787448k,mode=1777 my_image
This command mounts a `tmpfs` at `/tmp` within the container. The supported mount
options are the same as the Linux default `mount` flags. If you do not specify
any options, the systems uses the following options:
`rw,noexec,nosuid,nodev,size=65536k`.
**-t**, **--tty**=*true*|*false*
Allocate a pseudo-TTY. The default is *false*.
When set to true kpod will allocate a pseudo-tty and attach to the standard
input of the container. This can be used, for example, to run a throwaway
interactive shell. The default is false.
Note: The **-t** option is incompatible with a redirection of the kpod client
standard input.
**--ulimit**=[]
Ulimit options
**-u**, **--user**=""
Sets the username or UID used and optionally the groupname or GID for the specified command.
The followings examples are all valid:
--user [user | user:group | uid | uid:gid | user:gid | uid:group ]
Without this argument the command will be run as root in the container.
**--userns**=""
Set the usernamespace mode for the container when `userns-remap` option is enabled.
**host**: use the host usernamespace and enable all privileged options (e.g., `pid=host` or `--privileged`).
**--uts**=*host*
Set the UTS mode for the container
**host**: use the host's UTS namespace inside the container.
Note: the host mode gives the container access to changing the host's hostname and is therefore considered insecure.
**-v**|**--volume**[=*[[HOST-DIR:]CONTAINER-DIR[:OPTIONS]]*]
Create a bind mount. If you specify, ` -v /HOST-DIR:/CONTAINER-DIR`, kpod
bind mounts `/HOST-DIR` in the host to `/CONTAINER-DIR` in the kpod
container. If 'HOST-DIR' is omitted, kpod automatically creates the new
volume on the host. The `OPTIONS` are a comma delimited list and can be:
* [rw|ro]
* [z|Z]
* [`[r]shared`|`[r]slave`|`[r]private`]
The `CONTAINER-DIR` must be an absolute path such as `/src/docs`. The `HOST-DIR`
can be an absolute path or a `name` value. A `name` value must start with an
alphanumeric character, followed by `a-z0-9`, `_` (underscore), `.` (period) or
`-` (hyphen). An absolute path starts with a `/` (forward slash).
If you supply a `HOST-DIR` that is an absolute path, kpod bind-mounts to the
path you specify. If you supply a `name`, kpod creates a named volume by that
`name`. For example, you can specify either `/foo` or `foo` for a `HOST-DIR`
value. If you supply the `/foo` value, kpod creates a bind-mount. If you
supply the `foo` specification, kpod creates a named volume.
You can specify multiple **-v** options to mount one or more mounts to a
container. To use these same mounts in other containers, specify the
**--volumes-from** option also.
You can add `:ro` or `:rw` suffix to a volume to mount it read-only or
read-write mode, respectively. By default, the volumes are mounted read-write.
See examples.
Labeling systems like SELinux require that proper labels are placed on volume
content mounted into a container. Without a label, the security system might
prevent the processes running inside the container from using the content. By
default, kpod does not change the labels set by the OS.
To change a label in the container context, you can add either of two suffixes
`:z` or `:Z` to the volume mount. These suffixes tell kpod to relabel file
objects on the shared volumes. The `z` option tells kpod that two containers
share the volume content. As a result, kpod labels the content with a shared
content label. Shared volume labels allow all containers to read/write content.
The `Z` option tells kpod to label the content with a private unshared label.
Only the current container can use a private volume.
By default bind mounted volumes are `private`. That means any mounts done
inside container will not be visible on host and vice-a-versa. One can change
this behavior by specifying a volume mount propagation property. Making a
volume `shared` mounts done under that volume inside container will be
visible on host and vice-a-versa. Making a volume `slave` enables only one
way mount propagation and that is mounts done on host under that volume
will be visible inside container but not the other way around.
To control mount propagation property of volume one can use `:[r]shared`,
`:[r]slave` or `:[r]private` propagation flag. Propagation property can
be specified only for bind mounted volumes and not for internal volumes or
named volumes. For mount propagation to work source mount point (mount point
where source dir is mounted on) has to have right propagation properties. For
shared volumes, source mount point has to be shared. And for slave volumes,
source mount has to be either shared or slave.
Use `df <source-dir>` to figure out the source mount and then use
`findmnt -o TARGET,PROPAGATION <source-mount-dir>` to figure out propagation
properties of source mount. If `findmnt` utility is not available, then one
can look at mount entry for source mount point in `/proc/self/mountinfo`. Look
at `optional fields` and see if any propagaion properties are specified.
`shared:X` means mount is `shared`, `master:X` means mount is `slave` and if
nothing is there that means mount is `private`.
To change propagation properties of a mount point use `mount` command. For
example, if one wants to bind mount source directory `/foo` one can do
`mount --bind /foo /foo` and `mount --make-private --make-shared /foo`. This
will convert /foo into a `shared` mount point. Alternatively one can directly
change propagation properties of source mount. Say `/` is source mount for
`/foo`, then use `mount --make-shared /` to convert `/` into a `shared` mount.
To disable automatic copying of data from the container path to the volume, use
the `nocopy` flag. The `nocopy` flag can be set on bind mounts and named volumes.
**--volumes-from**=[]
Mount volumes from the specified container(s)
Mounts already mounted volumes from a source container onto another
container. You must supply the source's container-id. To share
a volume, use the **--volumes-from** option when running
the target container. You can share volumes even if the source container
is not running.
By default, kpod mounts the volumes in the same mode (read-write or
read-only) as it is mounted in the source container. Optionally, you
can change this by suffixing the container-id with either the `:ro` or
`:rw ` keyword.
If the location of the volume from the source container overlaps with
data residing on a target container, then the volume hides
that data on the target.
**-w**, **--workdir**=""
Working directory inside the container
The default working directory for running binaries within a container is the root directory (/).
The image developer can set a different default with the WORKDIR instruction. The operator
can override the working directory by using the **-w** option.
# EXAMPLES
# HISTORY
August 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
September 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
November 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
October 2017, converted from Docker documentation to kpod by Dan Walsh for kpod <dwalsh@redhat.com>

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% kpod(1) kpod-run - Run a command in a container
% Dan Walsh
kpod-run - Run a command in a new container
# SYNOPSIS
**kpod run** [*options* [...]] IMAGE [COMMAND] [ARG...]
# DESCRIPTION
Run a process in a new container. **kpod run** starts a process with its own
file system, its own networking, and its own isolated process tree. The IMAGE
which starts the process may define defaults related to the process that will be
run in the container, the networking to expose, and more, but **kpod run**
gives final control to the operator or administrator who starts the container
from the image. For that reason **kpod run** has more options than any other
kpod command.
If the IMAGE is not already loaded then **kpod run** will pull the IMAGE, and
all image dependencies, from the repository in the same way running **kpod
pull** IMAGE, before it starts the container from that image.
# OPTIONS
**--add-host**=[]
Add a custom host-to-IP mapping (host:ip)
Add a line to /etc/hosts. The format is hostname:ip. The **--add-host**
option can be set multiple times.
**-a**, **--attach**=[]
Attach to STDIN, STDOUT or STDERR.
In foreground mode (the default when **-d**
is not specified), **kpod run** can start the process in the container
and attach the console to the process's standard input, output, and standard
error. It can even pretend to be a TTY (this is what most commandline
executables expect) and pass along signals. The **-a** option can be set for
each of stdin, stdout, and stderr.
**--blkio-weight**=*0*
Block IO weight (relative weight) accepts a weight value between 10 and 1000.
**--blkio-weight-device**=[]
Block IO weight (relative device weight, format: `DEVICE_NAME:WEIGHT`).
**--cap-add**=[]
Add Linux capabilities
**--cap-drop**=[]
Drop Linux capabilities
**--cgroup-parent**=""
Path to cgroups under which the cgroup for the container will be created. If the path is not absolute, the path is considered to be relative to the cgroups path of the init process. Cgroups will be created if they do not already exist.
**--cidfile**=""
Write the container ID to the file
**--cpu-count**=*0*
Limit the number of CPUs available for execution by the container.
On Windows Server containers, this is approximated as a percentage of total CPU usage.
On Windows Server containers, the processor resource controls are mutually exclusive, the order of precedence is CPUCount first, then CPUShares, and CPUPercent last.
**--cpu-period**=*0*
Limit the CPU CFS (Completely Fair Scheduler) period
Limit the container's CPU usage. This flag tell the kernel to restrict the container's CPU usage to the period you specify.
**--cpu-quota**=*0*
Limit the CPU CFS (Completely Fair Scheduler) quota
Limit the container's CPU usage. By default, containers run with the full
CPU resource. This flag tell the kernel to restrict the container's CPU usage
to the quota you specify.
**--cpu-rt-period**=0
Limit the CPU real-time period in microseconds
Limit the container's Real Time CPU usage. This flag tell the kernel to restrict the container's Real Time CPU usage to the period you specify.
**--cpu-rt-runtime**=0
Limit the CPU real-time runtime in microseconds
Limit the containers Real Time CPU usage. This flag tells the kernel to limit the amount of time in a given CPU period Real Time tasks may consume. Ex:
Period of 1,000,000us and Runtime of 950,000us means that this container could consume 95% of available CPU and leave the remaining 5% to normal priority tasks.
The sum of all runtimes across containers cannot exceed the amount allotted to the parent cgroup.
**--cpu-shares**=*0*
CPU shares (relative weight)
By default, all containers get the same proportion of CPU cycles. This proportion
can be modified by changing the container's CPU share weighting relative
to the weighting of all other running containers.
To modify the proportion from the default of 1024, use the **--cpu-shares**
flag to set the weighting to 2 or higher.
The proportion will only apply when CPU-intensive processes are running.
When tasks in one container are idle, other containers can use the
left-over CPU time. The actual amount of CPU time will vary depending on
the number of containers running on the system.
For example, consider three containers, one has a cpu-share of 1024 and
two others have a cpu-share setting of 512. When processes in all three
containers attempt to use 100% of CPU, the first container would receive
50% of the total CPU time. If you add a fourth container with a cpu-share
of 1024, the first container only gets 33% of the CPU. The remaining containers
receive 16.5%, 16.5% and 33% of the CPU.
On a multi-core system, the shares of CPU time are distributed over all CPU
cores. Even if a container is limited to less than 100% of CPU time, it can
use 100% of each individual CPU core.
For example, consider a system with more than three cores. If you start one
container **{C0}** with **-c=512** running one process, and another container
**{C1}** with **-c=1024** running two processes, this can result in the following
division of CPU shares:
PID container CPU CPU share
100 {C0} 0 100% of CPU0
101 {C1} 1 100% of CPU1
102 {C1} 2 100% of CPU2
**--cpus**=0.0
Number of CPUs. The default is *0.0* which means no limit.
**--cpuset-cpus**=""
CPUs in which to allow execution (0-3, 0,1)
**--cpuset-mems**=""
Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only effective on NUMA systems.
If you have four memory nodes on your system (0-3), use `--cpuset-mems=0,1`
then processes in your container will only use memory from the first
two memory nodes.
**-d**, **--detach**=*true*|*false*
Detached mode: run the container in the background and print the new container ID. The default is *false*.
At any time you can run **kpod ps** in
the other shell to view a list of the running containers. You can reattach to a
detached container with **kpod attach**. If you choose to run a container in
the detached mode, then you cannot use the **-rm** option.
When attached in the tty mode, you can detach from the container (and leave it
running) using a configurable key sequence. The default sequence is `CTRL-p CTRL-q`.
You configure the key sequence using the **--detach-keys** option or a configuration file.
See **config-json(5)** for documentation on using a configuration file.
**--detach-keys**=""
Override the key sequence for detaching a container. Format is a single character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`, `@`, `^`, `[`, `,` or `_`.
**--device**=[]
Add a host device to the container (e.g. --device=/dev/sdc:/dev/xvdc:rwm)
**--device-read-bps**=[]
Limit read rate (bytes per second) from a device (e.g. --device-read-bps=/dev/sda:1mb)
**--device-read-iops**=[]
Limit read rate (IO per second) from a device (e.g. --device-read-iops=/dev/sda:1000)
**--device-write-bps**=[]
Limit write rate (bytes per second) to a device (e.g. --device-write-bps=/dev/sda:1mb)
**--device-write-iops**=[]
Limit write rate (IO per second) to a device (e.g. --device-write-iops=/dev/sda:1000)
**--dns**=[]
Set custom DNS servers
This option can be used to override the DNS
configuration passed to the container. Typically this is necessary when the
host DNS configuration is invalid for the container (e.g., 127.0.0.1). When this
is the case the **--dns** flags is necessary for every run.
**--dns-option**=[]
Set custom DNS options
**--dns-search**=[]
Set custom DNS search domains (Use --dns-search=. if you don't wish to set the search domain)
**--entrypoint**=""
Overwrite the default ENTRYPOINT of the image
This option allows you to overwrite the default entrypoint of the image.
The ENTRYPOINT of an image is similar to a COMMAND
because it specifies what executable to run when the container starts, but it is
(purposely) more difficult to override. The ENTRYPOINT gives a container its
default nature or behavior, so that when you set an ENTRYPOINT you can run the
container as if it were that binary, complete with default options, and you can
pass in more options via the COMMAND. But, sometimes an operator may want to run
something else inside the container, so you can override the default ENTRYPOINT
at runtime by using a **--entrypoint** and a string to specify the new
ENTRYPOINT.
**-e**, **--env**=[]
Set environment variables
This option allows you to specify arbitrary
environment variables that are available for the process that will be launched
inside of the container.
**--env-file**=[]
Read in a line delimited file of environment variables
**--expose**=[]
Expose a port, or a range of ports (e.g. --expose=3300-3310) to set up port redirection
on the host system.
**--group-add**=[]
Add additional groups to run as
**--hostname**=""
Container host name
Sets the container host name that is available inside the container.
**--help**
Print usage statement
**-i**, **--interactive**=*true*|*false*
Keep STDIN open even if not attached. The default is *false*.
When set to true, keep stdin open even if not attached. The default is false.
**--ip**=""
Sets the container's interface IPv4 address (e.g. 172.23.0.9)
It can only be used in conjunction with **--network** for user-defined networks
**--ip6**=""
Sets the container's interface IPv6 address (e.g. 2001:db8::1b99)
It can only be used in conjunction with **--network** for user-defined networks
**--ipc**=""
Default is to create a private IPC namespace (POSIX SysV IPC) for the container
'container:<name|id>': reuses another container shared memory, semaphores and message queues
'host': use the host shared memory,semaphores and message queues inside the container. Note: the host mode gives the container full access to local shared memory and is therefore considered insecure.
**--kernel-memory**=""
Kernel memory limit (format: `<number>[<unit>]`, where unit = b, k, m or g)
Constrains the kernel memory available to a container. If a limit of 0
is specified (not using `--kernel-memory`), the container's kernel memory
is not limited. If you specify a limit, it may be rounded up to a multiple
of the operating system's page size and the value can be very large,
millions of trillions.
**-l**, **--label**=[]
Add metadata to a container (e.g., --label com.example.key=value)
**--label-file**=[]
Read in a line delimited file of labels
**--link-local-ip**=[]
Add one or more link-local IPv4/IPv6 addresses to the container's interface
**--log-driver**="*json-file*|*syslog*|*journald*|*gelf*|*fluentd*|*awslogs*|*splunk*|*etwlogs*|*gcplogs*|*none*"
Logging driver for the container. Default is defined by daemon `--log-driver` flag.
**Warning**: the `kpod logs` command works only for the `json-file` and
`journald` logging drivers.
**--log-opt**=[]
Logging driver specific options.
**--mac-address**=""
Container MAC address (e.g. 92:d0:c6:0a:29:33)
Remember that the MAC address in an Ethernet network must be unique.
The IPv6 link-local address will be based on the device's MAC address
according to RFC4862.
**-m**, **--memory**=""
Memory limit (format: <number>[<unit>], where unit = b, k, m or g)
Allows you to constrain the memory available to a container. If the host
supports swap memory, then the **-m** memory setting can be larger than physical
RAM. If a limit of 0 is specified (not using **-m**), the container's memory is
not limited. The actual limit may be rounded up to a multiple of the operating
system's page size (the value would be very large, that's millions of trillions).
**--memory-reservation**=""
Memory soft limit (format: <number>[<unit>], where unit = b, k, m or g)
After setting memory reservation, when the system detects memory contention
or low memory, containers are forced to restrict their consumption to their
reservation. So you should always set the value below **--memory**, otherwise the
hard limit will take precedence. By default, memory reservation will be the same
as memory limit.
**--memory-swap**="LIMIT"
A limit value equal to memory plus swap. Must be used with the **-m**
(**--memory**) flag. The swap `LIMIT` should always be larger than **-m**
(**--memory**) value. By default, the swap `LIMIT` will be set to double
the value of --memory.
The format of `LIMIT` is `<number>[<unit>]`. Unit can be `b` (bytes),
`k` (kilobytes), `m` (megabytes), or `g` (gigabytes). If you don't specify a
unit, `b` is used. Set LIMIT to `-1` to enable unlimited swap.
**--memory-swappiness**=""
Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
**--name**=""
Assign a name to the container
The operator can identify a container in three ways:
UUID long identifier (“f78375b1c487e03c9438c729345e54db9d20cfa2ac1fc3494b6eb60872e74778”)
UUID short identifier (“f78375b1c487”)
Name (“jonah”)
kpod generates a UUID for each container, and if a name is not assigned
to the container with **--name** then the daemon will also generate a random
string name. The name is useful when defining links (see **--link**) (or any
other place you need to identify a container). This works for both background
and foreground containers.
**--network**="*bridge*"
Set the Network mode for the container
'bridge': create a network stack on the default bridge
'none': no networking
'container:<name|id>': reuse another container's network stack
'host': use the kpod host network stack. Note: the host mode gives the container full access to local system services such as D-bus and is therefore considered insecure.
'<network-name>|<network-id>': connect to a user-defined network
**--network-alias**=[]
Add network-scoped alias for the container
**--oom-kill-disable**=*true*|*false*
Whether to disable OOM Killer for the container or not.
**--oom-score-adj**=""
Tune the host's OOM preferences for containers (accepts -1000 to 1000)
**--pid**=""
Set the PID mode for the container
Default is to create a private PID namespace for the container
'container:<name|id>': join another container's PID namespace
'host': use the host's PID namespace for the container. Note: the host mode gives the container full access to local PID and is therefore considered insecure.
**--pids-limit**=""
Tune the container's pids limit. Set `-1` to have unlimited pids for the container.
**--pod**=""
Run container in an existing pod
**--privileged**=*true*|*false*
Give extended privileges to this container. The default is *false*.
By default, kpod containers are
“unprivileged” (=false) and cannot, for example, modify parts of the kernel.
This is because by default a container is not allowed to access any devices.
A “privileged” container is given access to all devices.
When the operator executes **kpod run --privileged**, kpod enables access
to all devices on the host as well as set turn off most of the security messurs
protecting the host from the container.
**-p**, **--publish**=[]
Publish a container's port, or range of ports, to the host
Format: `ip:hostPort:containerPort | ip::containerPort | hostPort:containerPort | containerPort`
Both hostPort and containerPort can be specified as a range of ports.
When specifying ranges for both, the number of container ports in the range must match the number of host ports in the range.
(e.g., `kpod run -p 1234-1236:1222-1224 --name thisWorks -t busybox`
but not `kpod run -p 1230-1236:1230-1240 --name RangeContainerPortsBiggerThanRangeHostPorts -t busybox`)
With ip: `kpod run -p 127.0.0.1:$HOSTPORT:$CONTAINERPORT --name CONTAINER -t someimage`
Use `kpod port` to see the actual mapping: `kpod port CONTAINER $CONTAINERPORT`
**-P**, **--publish-all**=*true*|*false*
Publish all exposed ports to random ports on the host interfaces. The default is *false*.
When set to true publish all exposed ports to the host interfaces. The
default is false. If the operator uses -P (or -p) then kpod will make the
exposed port accessible on the host and the ports will be available to any
client that can reach the host. When using -P, kpod will bind any exposed
port to a random port on the host within an *ephemeral port range* defined by
`/proc/sys/net/ipv4/ip_local_port_range`. To find the mapping between the host
ports and the exposed ports, use `kpod port`.
**--read-only**=*true*|*false*
Mount the container's root filesystem as read only.
By default a container will have its root filesystem writable allowing processes
to write files anywhere. By specifying the `--read-only` flag the container will have
its root filesystem mounted as read only prohibiting any writes.
**--rm**=*true*|*false*
Automatically remove the container when it exits. The default is *false*.
`--rm` flag can work together with `-d`, and auto-removal will be done on daemon side. Note that it's
incompatible with any restart policy other than `none`.
**--security-opt**=[]
Security Options
"label=user:USER" : Set the label user for the container
"label=role:ROLE" : Set the label role for the container
"label=type:TYPE" : Set the label type for the container
"label=level:LEVEL" : Set the label level for the container
"label=disable" : Turn off label confinement for the container
"no-new-privileges" : Disable container processes from gaining additional privileges
"seccomp=unconfined" : Turn off seccomp confinement for the container
"seccomp=profile.json : White listed syscalls seccomp Json file to be used as a seccomp filter
"apparmor=unconfined" : Turn off apparmor confinement for the container
"apparmor=your-profile" : Set the apparmor confinement profile for the container
**--shm-size**=""
Size of `/dev/shm`. The format is `<number><unit>`. `number` must be greater than `0`.
Unit is optional and can be `b` (bytes), `k` (kilobytes), `m`(megabytes), or `g` (gigabytes).
If you omit the unit, the system uses bytes. If you omit the size entirely, the system uses `64m`.
**--sig-proxy**=*true*|*false*
Proxy received signals to the process (non-TTY mode only). SIGCHLD, SIGSTOP, and SIGKILL are not proxied. The default is *true*.
**--stop-signal**=*SIGTERM*
Signal to stop a container. Default is SIGTERM.
**--stop-timeout**=*10*
Timeout (in seconds) to stop a container. Default is 10.
**--storage-opt**=[]
Storage driver options per container
$ kpod run -it --storage-opt size=120G fedora /bin/bash
This (size) will allow to set the container rootfs size to 120G at creation time.
This option is only available for the `devicemapper`, `btrfs`, `overlay2` and `zfs` graph drivers.
For the `devicemapper`, `btrfs` and `zfs` storage drivers, user cannot pass a size less than the Default BaseFS Size.
For the `overlay2` storage driver, the size option is only available if the backing fs is `xfs` and mounted with the `pquota` mount option.
Under these conditions, user can pass any size less then the backing fs size.
**--sysctl**=SYSCTL
Configure namespaced kernel parameters at runtime
IPC Namespace - current sysctls allowed:
kernel.msgmax, kernel.msgmnb, kernel.msgmni, kernel.sem, kernel.shmall, kernel.shmmax, kernel.shmmni, kernel.shm_rmid_forced
Sysctls beginning with fs.mqueue.*
Note: if you use the `--ipc=host` option these sysctls will not be allowed.
Network Namespace - current sysctls allowed:
Sysctls beginning with net.*
Note: if you use the `--network=host` option these sysctls will not be allowed.
**--tmpfs**=[] Create a tmpfs mount
Mount a temporary filesystem (`tmpfs`) mount into a container, for example:
$ kpod run -d --tmpfs /tmp:rw,size=787448k,mode=1777 my_image
This command mounts a `tmpfs` at `/tmp` within the container. The supported mount
options are the same as the Linux default `mount` flags. If you do not specify
any options, the systems uses the following options:
`rw,noexec,nosuid,nodev,size=65536k`.
**-t**, **--tty**=*true*|*false*
Allocate a pseudo-TTY. The default is *false*.
When set to true kpod will allocate a pseudo-tty and attach to the standard
input of the container. This can be used, for example, to run a throwaway
interactive shell. The default is false.
Note: The **-t** option is incompatible with a redirection of the kpod client
standard input.
**--ulimit**=[]
Ulimit options
**-u**, **--user**=""
Sets the username or UID used and optionally the groupname or GID for the specified command.
The followings examples are all valid:
--user [user | user:group | uid | uid:gid | user:gid | uid:group ]
Without this argument the command will be run as root in the container.
**--userns**=""
Set the usernamespace mode for the container when `userns-remap` option is enabled.
**host**: use the host usernamespace and enable all privileged options (e.g., `pid=host` or `--privileged`).
**--uts**=*host*
Set the UTS mode for the container
**host**: use the host's UTS namespace inside the container.
Note: the host mode gives the container access to changing the host's hostname and is therefore considered insecure.
**-v**|**--volume**[=*[[HOST-DIR:]CONTAINER-DIR[:OPTIONS]]*]
Create a bind mount. If you specify, ` -v /HOST-DIR:/CONTAINER-DIR`, kpod
bind mounts `/HOST-DIR` in the host to `/CONTAINER-DIR` in the kpod
container. If 'HOST-DIR' is omitted, kpod automatically creates the new
volume on the host. The `OPTIONS` are a comma delimited list and can be:
* [rw|ro]
* [z|Z]
* [`[r]shared`|`[r]slave`|`[r]private`]
* [nocopy]
The `CONTAINER-DIR` must be an absolute path such as `/src/docs`. The `HOST-DIR`
can be an absolute path or a `name` value. A `name` value must start with an
alphanumeric character, followed by `a-z0-9`, `_` (underscore), `.` (period) or
`-` (hyphen). An absolute path starts with a `/` (forward slash).
If you supply a `HOST-DIR` that is an absolute path, kpod bind-mounts to the
path you specify. If you supply a `name`, kpod creates a named volume by that
`name`. For example, you can specify either `/foo` or `foo` for a `HOST-DIR`
value. If you supply the `/foo` value, kpod creates a bind-mount. If you
supply the `foo` specification, kpod creates a named volume.
You can specify multiple **-v** options to mount one or more mounts to a
container. To use these same mounts in other containers, specify the
**--volumes-from** option also.
You can add `:ro` or `:rw` suffix to a volume to mount it read-only or
read-write mode, respectively. By default, the volumes are mounted read-write.
See examples.
Labeling systems like SELinux require that proper labels are placed on volume
content mounted into a container. Without a label, the security system might
prevent the processes running inside the container from using the content. By
default, kpod does not change the labels set by the OS.
To change a label in the container context, you can add either of two suffixes
`:z` or `:Z` to the volume mount. These suffixes tell kpod to relabel file
objects on the shared volumes. The `z` option tells kpod that two containers
share the volume content. As a result, kpod labels the content with a shared
content label. Shared volume labels allow all containers to read/write content.
The `Z` option tells kpod to label the content with a private unshared label.
Only the current container can use a private volume.
By default bind mounted volumes are `private`. That means any mounts done
inside container will not be visible on host and vice-a-versa. One can change
this behavior by specifying a volume mount propagation property. Making a
volume `shared` mounts done under that volume inside container will be
visible on host and vice-a-versa. Making a volume `slave` enables only one
way mount propagation and that is mounts done on host under that volume
will be visible inside container but not the other way around.
To control mount propagation property of volume one can use `:[r]shared`,
`:[r]slave` or `:[r]private` propagation flag. Propagation property can
be specified only for bind mounted volumes and not for internal volumes or
named volumes. For mount propagation to work source mount point (mount point
where source dir is mounted on) has to have right propagation properties. For
shared volumes, source mount point has to be shared. And for slave volumes,
source mount has to be either shared or slave.
Use `df <source-dir>` to figure out the source mount and then use
`findmnt -o TARGET,PROPAGATION <source-mount-dir>` to figure out propagation
properties of source mount. If `findmnt` utility is not available, then one
can look at mount entry for source mount point in `/proc/self/mountinfo`. Look
at `optional fields` and see if any propagaion properties are specified.
`shared:X` means mount is `shared`, `master:X` means mount is `slave` and if
nothing is there that means mount is `private`.
To change propagation properties of a mount point use `mount` command. For
example, if one wants to bind mount source directory `/foo` one can do
`mount --bind /foo /foo` and `mount --make-private --make-shared /foo`. This
will convert /foo into a `shared` mount point. Alternatively one can directly
change propagation properties of source mount. Say `/` is source mount for
`/foo`, then use `mount --make-shared /` to convert `/` into a `shared` mount.
To disable automatic copying of data from the container path to the volume, use
the `nocopy` flag. The `nocopy` flag can be set on bind mounts and named volumes.
**--volumes-from**=[]
Mount volumes from the specified container(s)
Mounts already mounted volumes from a source container onto another
container. You must supply the source's container-id. To share
a volume, use the **--volumes-from** option when running
the target container. You can share volumes even if the source container
is not running.
By default, kpod mounts the volumes in the same mode (read-write or
read-only) as it is mounted in the source container. Optionally, you
can change this by suffixing the container-id with either the `:ro` or
`:rw ` keyword.
If the location of the volume from the source container overlaps with
data residing on a target container, then the volume hides
that data on the target.
**-w**, **--workdir**=""
Working directory inside the container
The default working directory for running binaries within a container is the root directory (/).
The image developer can set a different default with the WORKDIR instruction. The operator
can override the working directory by using the **-w** option.
# Exit Status
The exit code from `kpod run` gives information about why the container
failed to run or why it exited. When `kpod run` exits with a non-zero code,
the exit codes follow the `chroot` standard, see below:
**_125_** if the error is with kpod **_itself_**
$ kpod run --foo busybox; echo $?
# flag provided but not defined: --foo
See 'kpod run --help'.
125
**_126_** if the **_contained command_** cannot be invoked
$ kpod run busybox /etc; echo $?
# exec: "/etc": permission denied
kpod: Error response from daemon: Contained command could not be invoked
126
**_127_** if the **_contained command_** cannot be found
$ kpod run busybox foo; echo $?
# exec: "foo": executable file not found in $PATH
kpod: Error response from daemon: Contained command not found or does not exist
127
**_Exit code_** of **_contained command_** otherwise
$ kpod run busybox /bin/sh -c 'exit 3'
# 3
# EXAMPLES
## Running container in read-only mode
During container image development, containers often need to write to the image
content. Installing packages into /usr, for example. In production,
applications seldom need to write to the image. Container applications write
to volumes if they need to write to file systems at all. Applications can be
made more secure by running them in read-only mode using the - -read-only switch.
This protects the containers image from modification. Read only containers may
still need to write temporary data. The best way to handle this is to mount
tmpfs directories on /run and /tmp.
# kpod run --read-only --tmpfs /run --tmpfs /tmp -i -t fedora /bin/bash
## Exposing log messages from the container to the host's log
If you want messages that are logged in your container to show up in the host's
syslog/journal then you should bind mount the /dev/log directory as follows.
# kpod run -v /dev/log:/dev/log -i -t fedora /bin/bash
From inside the container you can test this by sending a message to the log.
(bash)# logger "Hello from my container"
Then exit and check the journal.
# exit
# journalctl -b | grep Hello
This should list the message sent to logger.
## Attaching to one or more from STDIN, STDOUT, STDERR
If you do not specify -a then kpod will attach everything (stdin,stdout,stderr)
. You can specify to which of the three standard streams (stdin, stdout, stderr)
you'd like to connect instead, as in:
# kpod run -a stdin -a stdout -i -t fedora /bin/bash
## Sharing IPC between containers
Using shm_server.c available here: https://www.cs.cf.ac.uk/Dave/C/node27.html
Testing `--ipc=host` mode:
Host shows a shared memory segment with 7 pids attached, happens to be from httpd:
```
$ sudo ipcs -m
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
0x01128e25 0 root 600 1000 7
```
Now run a regular container, and it correctly does NOT see the shared memory segment from the host:
```
$ kpod run -it shm ipcs -m
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
```
Run a container with the new `--ipc=host` option, and it now sees the shared memory segment from the host httpd:
```
$ kpod run -it --ipc=host shm ipcs -m
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
0x01128e25 0 root 600 1000 7
```
Testing `--ipc=container:CONTAINERID` mode:
Start a container with a program to create a shared memory segment:
```
$ kpod run -it shm bash
$ sudo shm/shm_server &
$ sudo ipcs -m
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
0x0000162e 0 root 666 27 1
```
Create a 2nd container correctly shows no shared memory segment from 1st container:
```
$ kpod run shm ipcs -m
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
```
Create a 3rd container using the new --ipc=container:CONTAINERID option, now it shows the shared memory segment from the first:
```
$ kpod run -it --ipc=container:ed735b2264ac shm ipcs -m
$ sudo ipcs -m
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
0x0000162e 0 root 666 27 1
```
## Mapping Ports for External Usage
The exposed port of an application can be mapped to a host port using the **-p**
flag. For example, an httpd port 80 can be mapped to the host port 8080 using the
following:
# kpod run -p 8080:80 -d -i -t fedora/httpd
## Creating and Mounting a Data Volume Container
Many applications require the sharing of persistent data across several
containers. kpod allows you to create a Data Volume Container that other
containers can mount from. For example, create a named container that contains
directories /var/volume1 and /tmp/volume2. The image will need to contain these
directories so a couple of RUN mkdir instructions might be required for you
fedora-data image:
# kpod run --name=data -v /var/volume1 -v /tmp/volume2 -i -t fedora-data true
# kpod run --volumes-from=data --name=fedora-container1 -i -t fedora bash
Multiple --volumes-from parameters will bring together multiple data volumes from
multiple containers. And it's possible to mount the volumes that came from the
DATA container in yet another container via the fedora-container1 intermediary
container, allowing to abstract the actual data source from users of that data:
# kpod run --volumes-from=fedora-container1 --name=fedora-container2 -i -t fedora bash
## Mounting External Volumes
To mount a host directory as a container volume, specify the absolute path to
the directory and the absolute path for the container directory separated by a
colon:
# kpod run -v /var/db:/data1 -i -t fedora bash
When using SELinux, be aware that the host has no knowledge of container SELinux
policy. Therefore, in the above example, if SELinux policy is enforced, the
`/var/db` directory is not writable to the container. A "Permission Denied"
message will occur and an avc: message in the host's syslog.
To work around this, at time of writing this man page, the following command
needs to be run in order for the proper SELinux policy type label to be attached
to the host directory:
# chcon -Rt svirt_sandbox_file_t /var/db
Now, writing to the /data1 volume in the container will be allowed and the
changes will also be reflected on the host in /var/db.
## Using alternative security labeling
You can override the default labeling scheme for each container by specifying
the `--security-opt` flag. For example, you can specify the MCS/MLS level, a
requirement for MLS systems. Specifying the level in the following command
allows you to share the same content between containers.
# kpod run --security-opt label=level:s0:c100,c200 -i -t fedora bash
An MLS example might be:
# kpod run --security-opt label=level:TopSecret -i -t rhel7 bash
To disable the security labeling for this container versus running with the
`--permissive` flag, use the following command:
# kpod run --security-opt label=disable -i -t fedora bash
If you want a tighter security policy on the processes within a container,
you can specify an alternate type for the container. You could run a container
that is only allowed to listen on Apache ports by executing the following
command:
# kpod run --security-opt label=type:svirt_apache_t -i -t centos bash
Note:
You would have to write policy defining a `svirt_apache_t` type.
## Setting device weight
If you want to set `/dev/sda` device weight to `200`, you can specify the device
weight by `--blkio-weight-device` flag. Use the following command:
# kpod run -it --blkio-weight-device "/dev/sda:200" ubuntu
```
$ kpod run -d busybox top
```
## Setting Namespaced Kernel Parameters (Sysctls)
The `--sysctl` sets namespaced kernel parameters (sysctls) in the
container. For example, to turn on IP forwarding in the containers
network namespace, run this command:
$ kpod run --sysctl net.ipv4.ip_forward=1 someimage
Note:
Not all sysctls are namespaced. kpod does not support changing sysctls
inside of a container that also modify the host system. As the kernel
evolves we expect to see more sysctls become namespaced.
See the definition of the `--sysctl` option above for the current list of
supported sysctls.
# HISTORY
April 2014, Originally compiled by William Henry (whenry at redhat dot com)
based on docker.com source material and internal work.
June 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
July 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
November 2015, updated by Sally O'Malley <somalley@redhat.com>
October 2017, converted from Docker documentation to kpod by Dan Walsh for kpod <dwalsh@redhat.com>

6
docs/kpod.1.md
View File

@ -49,6 +49,9 @@ has the capability to debug pods/images created by crio.
## COMMANDS
### create
create a new container
### diff
Inspect changes on a container or image's filesystem
@ -106,6 +109,9 @@ Remove one or more containers
### rmi
Removes one or more locally stored images
### run
Run a command in a new container
### save
Save an image to docker-archive or oci

30
libpod/container.go
View File

@ -10,11 +10,13 @@ import (
"github.com/containers/storage"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/term"
crioAnnotations "github.com/kubernetes-incubator/cri-o/pkg/annotations"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/ulule/deepcopier"
"k8s.io/client-go/tools/remotecommand"
)
// ContainerState represents the current state of a container
@ -391,8 +393,32 @@ func (c *Container) Exec(cmd []string, tty bool, stdin bool) (string, error) {
// Attach attaches to a container
// Returns fully qualified URL of streaming server for the container
func (c *Container) Attach(stdin, tty bool) (string, error) {
return "", ErrNotImplemented
func (c *Container) Attach(noStdin bool, keys string) error {
// Check the validity of the provided keys first
var err error
detachKeys := []byte{}
if len(keys) > 0 {
detachKeys, err = term.ToBytes(keys)
if err != nil {
return errors.Wrapf(err, "invalid detach keys")
}
}
cStatus := c.state.State
if !(cStatus == ContainerStateRunning || cStatus == ContainerStateCreated) {
return errors.Errorf("%s is not created or running", c.Name())
}
resize := make(chan remotecommand.TerminalSize)
defer close(resize)
err = c.attachContainerSocket(resize, noStdin, detachKeys)
if err != nil {
return err
}
// TODO
// Re-enable this when mheon is done wth it
//c.ContainerStateToDisk(c)
return nil
}
// Mount mounts a container's filesystem on the host

142
libpod/container_attach.go Normal file
View File

@ -0,0 +1,142 @@
package libpod
import (
"fmt"
"io"
"net"
"os"
"path/filepath"
"strconv"
"github.com/docker/docker/pkg/term"
"github.com/kubernetes-incubator/cri-o/utils"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"golang.org/x/sys/unix"
"k8s.io/client-go/tools/remotecommand"
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
)
/* Sync with stdpipe_t in conmon.c */
const (
AttachPipeStdin = 1
AttachPipeStdout = 2
AttachPipeStderr = 3
)
// attachContainerSocket connects to the container's attach socket and deals with the IO
func (c *Container) attachContainerSocket(resize <-chan remotecommand.TerminalSize, noStdIn bool, detachKeys []byte) error {
inputStream := os.Stdin
outputStream := os.Stdout
errorStream := os.Stderr
defer inputStream.Close()
tty, err := strconv.ParseBool(c.runningSpec.Annotations["io.kubernetes.cri-o.TTY"])
if err != nil {
return errors.Wrapf(err, "unable to parse annotations in %s", c.ID)
}
if !tty {
return errors.Errorf("no tty available for %s", c.ID())
}
oldTermState, err := term.SaveState(inputStream.Fd())
if err != nil {
return errors.Wrapf(err, "unable to save terminal state")
}
defer term.RestoreTerminal(inputStream.Fd(), oldTermState)
// Put both input and output into raw
if !noStdIn {
term.SetRawTerminal(inputStream.Fd())
}
controlPath := filepath.Join(c.state.RunDir, "ctl")
controlFile, err := os.OpenFile(controlPath, unix.O_WRONLY, 0)
if err != nil {
return errors.Wrapf(err, "failed to open container ctl file: %v")
}
kubecontainer.HandleResizing(resize, func(size remotecommand.TerminalSize) {
logrus.Debugf("Received a resize event: %+v", size)
_, err := fmt.Fprintf(controlFile, "%d %d %d\n", 1, size.Height, size.Width)
if err != nil {
logrus.Warnf("Failed to write to control file to resize terminal: %v", err)
}
})
logrus.Debug("connecting to socket ", c.attachSocketPath())
conn, err := net.DialUnix("unixpacket", nil, &net.UnixAddr{Name: c.attachSocketPath(), Net: "unixpacket"})
if err != nil {
return errors.Wrapf(err, "failed to connect to container's attach socket: %v")
}
defer conn.Close()
receiveStdoutError := make(chan error)
if outputStream != nil || errorStream != nil {
go func() {
receiveStdoutError <- redirectResponseToOutputStreams(outputStream, errorStream, conn)
}()
}
stdinDone := make(chan error)
go func() {
var err error
if inputStream != nil && !noStdIn {
_, err = utils.CopyDetachable(conn, inputStream, detachKeys)
conn.CloseWrite()
}
stdinDone <- err
}()
select {
case err := <-receiveStdoutError:
return err
case err := <-stdinDone:
if _, ok := err.(utils.DetachError); ok {
return nil
}
if outputStream != nil || errorStream != nil {
return <-receiveStdoutError
}
}
return nil
}
func redirectResponseToOutputStreams(outputStream, errorStream io.Writer, conn io.Reader) error {
var err error
buf := make([]byte, 8192+1) /* Sync with conmon STDIO_BUF_SIZE */
for {
nr, er := conn.Read(buf)
if nr > 0 {
var dst io.Writer
switch buf[0] {
case AttachPipeStdout:
dst = outputStream
case AttachPipeStderr:
dst = errorStream
default:
logrus.Infof("Received unexpected attach type %+d", buf[0])
}
if dst != nil {
nw, ew := dst.Write(buf[1:nr])
if ew != nil {
err = ew
break
}
if nr != nw+1 {
err = io.ErrShortWrite
break
}
}
}
if er == io.EOF {
break
}
if er != nil {
err = er
break
}
}
return err
}

1
libpod/runtime_ctr.go
View File

@ -22,7 +22,6 @@ type ContainerFilter func(*Container) bool
func (r *Runtime) NewContainer(spec *spec.Spec, options ...CtrCreateOption) (ctr *Container, err error) {
r.lock.Lock()
defer r.lock.Unlock()
if !r.valid {
return nil, ErrRuntimeStopped
}

259
libpod/runtime_img.go
View File

@ -4,6 +4,7 @@ import (
"encoding/json"
"fmt"
"io"
"net"
"os"
"strings"
"syscall"
@ -46,6 +47,8 @@ var (
// DirTransport is the transport for pushing and pulling
// images to and from a directory
DirTransport = "dir"
// TransportNames are the supported transports in string form
TransportNames = [...]string{DefaultRegistry, DockerArchive, OCIArchive, "ostree:", "dir:"}
)
// CopyOptions contains the options given when pushing or pulling images
@ -94,6 +97,262 @@ type imageDecomposeStruct struct {
transport string
}
func (k *Image) assembleFqName() string {
return fmt.Sprintf("%s/%s:%s", k.Registry, k.ImageName, k.Tag)
}
func (k *Image) assembleFqNameTransport() string {
return fmt.Sprintf("%s%s/%s:%s", k.Transport, k.Registry, k.ImageName, k.Tag)
}
//Image describes basic attributes of an image
type Image struct {
Name string
ID string
fqname string
hasImageLocal bool
runtime *Runtime
Registry string
ImageName string
Tag string
HasRegistry bool
Transport string
beenDecomposed bool
PullName string
}
// NewImage creates a new image object based on its name
func (r *Runtime) NewImage(name string) Image {
return Image{
Name: name,
runtime: r,
}
}
// GetImageID returns the image ID of the image
func (k *Image) GetImageID() (string, error) {
if k.ID != "" {
return k.ID, nil
}
image, _ := k.GetFQName()
img, err := k.runtime.GetImage(image)
if err != nil {
return "", err
}
return img.ID, nil
}
// GetFQName returns the fully qualified image name if it can be determined
func (k *Image) GetFQName() (string, error) {
// Check if the fqname has already been found
if k.fqname != "" {
return k.fqname, nil
}
if err := k.Decompose(); err != nil {
return "", err
}
k.fqname = k.assembleFqName()
return k.fqname, nil
}
func (k *Image) findImageOnRegistry() error {
searchRegistries, err := GetRegistries()
if err != nil {
return errors.Wrapf(err, " the image name '%s' is incomplete.", k.Name)
}
for _, searchRegistry := range searchRegistries {
k.Registry = searchRegistry
err = k.GetManifest()
if err == nil {
k.fqname = k.assembleFqName()
return nil
}
}
return errors.Errorf("unable to find image on any configured registries")
}
// GetManifest tries to GET an images manifest, returns nil on success and err on failure
func (k *Image) GetManifest() error {
pullRef, err := alltransports.ParseImageName(k.assembleFqNameTransport())
if err != nil {
return errors.Errorf("unable to parse1 '%s'", k.assembleFqName())
}
imageSource, err := pullRef.NewImageSource(nil)
if err != nil {
return errors.Wrapf(err, "unable to create new image source")
}
_, _, err = imageSource.GetManifest()
if err == nil {
return nil
}
return err
}
//Decompose breaks up an image name into its parts
func (k *Image) Decompose() error {
if k.beenDecomposed {
return nil
}
k.beenDecomposed = true
k.Transport = "docker://"
decomposeName := k.Name
for _, transport := range TransportNames {
if strings.HasPrefix(k.Name, transport) {
k.Transport = transport
decomposeName = strings.Replace(k.Name, transport, "", -1)
break
}
}
if k.Transport == "dir:" {
return nil
}
var imageError = fmt.Sprintf("unable to parse '%s'\n", decomposeName)
imgRef, err := reference.Parse(decomposeName)
if err != nil {
return errors.Wrapf(err, imageError)
}
tagged, isTagged := imgRef.(reference.NamedTagged)
k.Tag = "latest"
if isTagged {
k.Tag = tagged.Tag()
}
k.HasRegistry = true
registry := reference.Domain(imgRef.(reference.Named))
if registry == "" {
k.HasRegistry = false
}
k.ImageName = reference.Path(imgRef.(reference.Named))
// account for image names with directories in them like
// umohnani/get-started:part1
if k.HasRegistry {
k.Registry = registry
k.fqname = k.assembleFqName()
k.PullName = k.assembleFqName()
registries, err := getRegistries()
if err != nil {
return nil
}
if StringInSlice(k.Registry, registries) {
return nil
}
// We need to check if the registry name is legit
_, err = net.LookupAddr(k.Registry)
if err == nil {
return nil
}
// Combine the Registry and Image Name together and blank out the Registry Name
k.ImageName = fmt.Sprintf("%s/%s", k.Registry, k.ImageName)
k.Registry = ""
}
// No Registry means we check the globals registries configuration file
// and assemble a list of candidate sources to try
//searchRegistries, err := GetRegistries()
err = k.findImageOnRegistry()
k.PullName = k.assembleFqName()
if err != nil {
return errors.Wrapf(err, " the image name '%s' is incomplete.", k.Name)
}
return nil
}
// HasImageLocal returns a bool true if the image is already pulled
func (k *Image) HasImageLocal() bool {
_, err := k.runtime.GetImage(k.Name)
if err == nil {
return true
}
fqname, _ := k.GetFQName()
_, err = k.runtime.GetImage(fqname)
if err == nil {
return true
}
return false
}
// HasLatest determines if we have the latest image local
func (k *Image) HasLatest() (bool, error) {
if !k.HasImageLocal() {
return false, nil
}
fqname, err := k.GetFQName()
if err != nil {
return false, err
}
pullRef, err := alltransports.ParseImageName(fqname)
if err != nil {
return false, err
}
_, _, err = pullRef.(types.ImageSource).GetManifest()
if err != nil {
return false, err
}
return false, nil
}
// Pull is a wrapper function to pull and image
func (k *Image) Pull() error {
// If the image hasn't been decomposed yet
if !k.beenDecomposed {
err := k.Decompose()
if err != nil {
return err
}
}
k.runtime.PullImage(k.PullName, CopyOptions{Writer: os.Stdout, SignaturePolicyPath: k.runtime.config.SignaturePolicyPath})
return nil
}
// GetRegistries gets the searchable registries from the global registration file.
func GetRegistries() ([]string, error) {
registryConfigPath := ""
envOverride := os.Getenv("REGISTRIES_CONFIG_PATH")
if len(envOverride) > 0 {
registryConfigPath = envOverride
}
searchRegistries, err := sysregistries.GetRegistries(&types.SystemContext{SystemRegistriesConfPath: registryConfigPath})
if err != nil {
return nil, errors.Errorf("unable to parse the registries.conf file")
}
return searchRegistries, nil
}
// GetInsecureRegistries obtains the list of inseure registries from the global registration file.
func GetInsecureRegistries() ([]string, error) {
registryConfigPath := ""
envOverride := os.Getenv("REGISTRIES_CONFIG_PATH")
if len(envOverride) > 0 {
registryConfigPath = envOverride
}
registries, err := sysregistries.GetInsecureRegistries(&types.SystemContext{SystemRegistriesConfPath: registryConfigPath})
if err != nil {
return nil, errors.Errorf("unable to parse the registries.conf file")
}
return registries, nil
}
// getRegistries returns both searchable and insecure registries from the global conf file.
func getRegistries() ([]string, error) {
var r []string
registries, err := GetRegistries()
if err != nil {
return r, err
}
insecureRegistries, err := GetInsecureRegistries()
if err != nil {
return r, err
}
r = append(registries, insecureRegistries...)
return r, nil
}
// ImageFilter is a function to determine whether an image is included in
// command output. Images to be outputted are tested using the function. A true
// return will include the image, a false return will exclude it.

2
libpod/storage.go
View File

@ -57,7 +57,7 @@ func (metadata *RuntimeContainerMetadata) SetMountLabel(mountLabel string) {
}
// CreateContainerStorage creates the storage end of things. We already have the container spec created
// TO-DO We should be passing in an KpodImage object in the future.
// TO-DO We should be passing in an Image object in the future.
func (r *storageService) CreateContainerStorage(systemContext *types.SystemContext, imageName, imageID, containerName, containerID, mountLabel string) (ContainerInfo, error) {
var ref types.ImageReference
if imageName == "" && imageID == "" {

34
libpod/util.go Normal file
View File

@ -0,0 +1,34 @@
package libpod
import (
"os"
"path/filepath"
)
// WriteFile writes a provided string to a provided path
func WriteFile(content string, path string) error {
baseDir := filepath.Dir(path)
if baseDir != "" {
if _, err := os.Stat(path); err != nil {
return err
}
}
f, err := os.Create(path)
if err != nil {
return err
}
defer f.Close()
f.WriteString(content)
f.Sync()
return nil
}
// StringInSlice determines if a string is in a string slice, returns bool
func StringInSlice(s string, sl []string) bool {
for _, i := range sl {
if i == s {
return true
}
}
return false
}

2
test/helpers.bash
View File

@ -99,7 +99,7 @@ CRIO_CNI_PLUGIN=${CRIO_CNI_PLUGIN:-/opt/cni/bin/}
POD_CIDR="10.88.0.0/16"
POD_CIDR_MASK="10.88.*.*"
KPOD_OPTIONS="--root $TESTDIR/crio $STORAGE_OPTIONS --runroot $TESTDIR/crio-run --runtime ${RUNTIME_BINARY}"
KPOD_OPTIONS="--root $TESTDIR/crio $STORAGE_OPTIONS --runroot $TESTDIR/crio-run --runtime ${RUNTIME_BINARY} --conmon ${CONMON_BINARY}"
cp "$CONMON_BINARY" "$TESTDIR/conmon"

24
test/kpod_create.bats Normal file
View File

@ -0,0 +1,24 @@
#!/usr/bin/env bats
load helpers
function teardown() {
cleanup_test
}
ALPINE="docker.io/library/alpine:latest"
@test "create a container based on local image" {
run ${KPOD_BINARY} ${KPOD_OPTIONS} pull docker.io/library/busybox:latest
echo "$output"
[ "$status" -eq 0 ]
run ${KPOD_BINARY} ${KPOD_OPTIONS} create docker.io/library/busybox:latest ls
echo "$output"
[ "$status" -eq 0 ]
}
@test "create a container based on a remote image" {
run ${KPOD_BINARY} ${KPOD_OPTIONS} create ${ALPINE} ls
echo "$output"
[ "$status" -eq 0 ]
}

20
test/kpod_run.bats Normal file
View File

@ -0,0 +1,20 @@
#!/usr/bin/env bats
load helpers
ALPINE="docker.io/library/alpine:latest"
@test "run a container based on local image" {
run ${KPOD_BINARY} ${KPOD_OPTIONS} pull docker.io/library/busybox:latest
echo "$output"
[ "$status" -eq 0 ]
run ${KPOD_BINARY} ${KPOD_OPTIONS} run docker.io/library/busybox:latest ls
echo "$output"
[ "$status" -eq 0 ]
}
@test "run a container based on a remote image" {
run ${KPOD_BINARY} ${KPOD_OPTIONS} run ${ALPINE} ls
echo "$output"
[ "$status" -eq 0 ]
}

4
transfer.md
View File

@ -42,6 +42,7 @@ There are other equivalents for these tools
| `docker attach` | [`kpod exec`](./docs/kpod-attach.1.md) ***|
| `docker build` | [`buildah bud`](https://github.com/projectatomic/buildah/blob/master/docs/buildah-bud.md) |
| `docker cp` | [`kpod mount`](./docs/kpod-cp.1.md) **** |
| `docker create` | [`kpod create`](./docs/kpod-create.1.md) |
| `docker diff` | [`kpod diff`](./docs/kpod-diff.1.md) |
| `docker export` | [`kpod export`](./docs/kpod-export.1.md) |
| `docker history`| [`kpod history`](./docs/kpod-history.1.md)|
@ -57,12 +58,13 @@ There are other equivalents for these tools
| `docker rename` | [`kpod rename`](./docs/kpod-rename.1.md) |
| `docker rm` | [`kpod rm`](./docs/kpod-rm.1.md) |
| `docker rmi` | [`kpod rmi`](./docs/kpod-rmi.1.md) |
| `docker run` | [`kpod run`](./docs/kpod-run.1.md) |
| `docker save` | [`kpod save`](./docs/kpod-save.1.md) |
| `docker stop` | [`kpod stop`](./docs/kpod-stop.1.md) |
| `docker tag` | [`kpod tag`](./docs/kpod-tag.1.md) |
| `docker unpause`| [`kpod unpause`](./docs/kpod-unpause.1.md)|
| `docker version`| [`kpod version`](./docs/kpod-version.1.md)|
| `docker wait` | [`kpod wait`](./docs/kpod-wait.1.md)|
| `docker wait` | [`kpod wait`](./docs/kpod-wait.1.md) |
*** Use `kpod exec` to enter a container and `kpod logs` to view the output of pid 1 of a container.
**** Use mount to take advantage of the entire linux tool chain rather then just cp. Read [`here`](./docs/kpod-cp.1.md) for more information.