1107 lines
30 KiB
Go
1107 lines
30 KiB
Go
// Package generate implements functions generating container config files.
|
|
package generate
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"runtime"
|
|
"strings"
|
|
|
|
rspec "github.com/opencontainers/runtime-spec/specs-go"
|
|
"github.com/opencontainers/runtime-tools/generate/seccomp"
|
|
"github.com/opencontainers/runtime-tools/validate"
|
|
"github.com/syndtr/gocapability/capability"
|
|
)
|
|
|
|
var (
|
|
// Namespaces include the names of supported namespaces.
|
|
Namespaces = []string{"network", "pid", "mount", "ipc", "uts", "user", "cgroup"}
|
|
)
|
|
|
|
// Generator represents a generator for a container spec.
|
|
type Generator struct {
|
|
spec *rspec.Spec
|
|
HostSpecific bool
|
|
}
|
|
|
|
// ExportOptions have toggles for exporting only certain parts of the specification
|
|
type ExportOptions struct {
|
|
Seccomp bool // seccomp toggles if only seccomp should be exported
|
|
}
|
|
|
|
// New creates a spec Generator with the default spec.
|
|
func New() Generator {
|
|
spec := rspec.Spec{
|
|
Version: rspec.Version,
|
|
Platform: rspec.Platform{
|
|
OS: runtime.GOOS,
|
|
Arch: runtime.GOARCH,
|
|
},
|
|
Root: rspec.Root{
|
|
Path: "",
|
|
Readonly: false,
|
|
},
|
|
Process: rspec.Process{
|
|
Terminal: false,
|
|
User: rspec.User{},
|
|
Args: []string{
|
|
"sh",
|
|
},
|
|
Env: []string{
|
|
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
|
|
"TERM=xterm",
|
|
},
|
|
Cwd: "/",
|
|
Capabilities: &rspec.LinuxCapabilities{
|
|
Bounding: []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",
|
|
},
|
|
Permitted: []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",
|
|
},
|
|
Inheritable: []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",
|
|
},
|
|
Effective: []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",
|
|
},
|
|
Ambient: []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",
|
|
},
|
|
},
|
|
Rlimits: []rspec.LinuxRlimit{
|
|
{
|
|
Type: "RLIMIT_NOFILE",
|
|
Hard: uint64(1024),
|
|
Soft: uint64(1024),
|
|
},
|
|
},
|
|
},
|
|
Hostname: "mrsdalloway",
|
|
Mounts: []rspec.Mount{
|
|
{
|
|
Destination: "/proc",
|
|
Type: "proc",
|
|
Source: "proc",
|
|
Options: nil,
|
|
},
|
|
{
|
|
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: "/dev/shm",
|
|
Type: "tmpfs",
|
|
Source: "shm",
|
|
Options: []string{"nosuid", "noexec", "nodev", "mode=1777", "size=65536k"},
|
|
},
|
|
{
|
|
Destination: "/dev/mqueue",
|
|
Type: "mqueue",
|
|
Source: "mqueue",
|
|
Options: []string{"nosuid", "noexec", "nodev"},
|
|
},
|
|
{
|
|
Destination: "/sys",
|
|
Type: "sysfs",
|
|
Source: "sysfs",
|
|
Options: []string{"nosuid", "noexec", "nodev", "ro"},
|
|
},
|
|
},
|
|
Linux: &rspec.Linux{
|
|
Resources: &rspec.LinuxResources{
|
|
Devices: []rspec.LinuxDeviceCgroup{
|
|
{
|
|
Allow: false,
|
|
Access: "rwm",
|
|
},
|
|
},
|
|
},
|
|
Namespaces: []rspec.LinuxNamespace{
|
|
{
|
|
Type: "pid",
|
|
},
|
|
{
|
|
Type: "network",
|
|
},
|
|
{
|
|
Type: "ipc",
|
|
},
|
|
{
|
|
Type: "uts",
|
|
},
|
|
{
|
|
Type: "mount",
|
|
},
|
|
},
|
|
Devices: []rspec.LinuxDevice{},
|
|
},
|
|
}
|
|
spec.Linux.Seccomp = seccomp.DefaultProfile(&spec)
|
|
return Generator{
|
|
spec: &spec,
|
|
}
|
|
}
|
|
|
|
// NewFromSpec creates a spec Generator from a given spec.
|
|
func NewFromSpec(spec *rspec.Spec) Generator {
|
|
return Generator{
|
|
spec: spec,
|
|
}
|
|
}
|
|
|
|
// NewFromFile loads the template specified in a file into a spec Generator.
|
|
func NewFromFile(path string) (Generator, error) {
|
|
cf, err := os.Open(path)
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
return Generator{}, fmt.Errorf("template configuration at %s not found", path)
|
|
}
|
|
}
|
|
defer cf.Close()
|
|
|
|
return NewFromTemplate(cf)
|
|
}
|
|
|
|
// NewFromTemplate loads the template from io.Reader into a spec Generator.
|
|
func NewFromTemplate(r io.Reader) (Generator, error) {
|
|
var spec rspec.Spec
|
|
if err := json.NewDecoder(r).Decode(&spec); err != nil {
|
|
return Generator{}, err
|
|
}
|
|
return Generator{
|
|
spec: &spec,
|
|
}, nil
|
|
}
|
|
|
|
// SetSpec sets the spec in the Generator g.
|
|
func (g *Generator) SetSpec(spec *rspec.Spec) {
|
|
g.spec = spec
|
|
}
|
|
|
|
// Spec gets the spec in the Generator g.
|
|
func (g *Generator) Spec() *rspec.Spec {
|
|
return g.spec
|
|
}
|
|
|
|
// Save writes the spec into w.
|
|
func (g *Generator) Save(w io.Writer, exportOpts ExportOptions) (err error) {
|
|
var data []byte
|
|
|
|
if g.spec.Linux != nil {
|
|
buf, err := json.Marshal(g.spec.Linux)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if string(buf) == "{}" {
|
|
g.spec.Linux = nil
|
|
}
|
|
}
|
|
|
|
if exportOpts.Seccomp {
|
|
data, err = json.MarshalIndent(g.spec.Linux.Seccomp, "", "\t")
|
|
} else {
|
|
data, err = json.MarshalIndent(g.spec, "", "\t")
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = w.Write(data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// SaveToFile writes the spec into a file.
|
|
func (g *Generator) SaveToFile(path string, exportOpts ExportOptions) error {
|
|
f, err := os.Create(path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close()
|
|
return g.Save(f, exportOpts)
|
|
}
|
|
|
|
// SetVersion sets g.spec.Version.
|
|
func (g *Generator) SetVersion(version string) {
|
|
g.initSpec()
|
|
g.spec.Version = version
|
|
}
|
|
|
|
// SetRootPath sets g.spec.Root.Path.
|
|
func (g *Generator) SetRootPath(path string) {
|
|
g.initSpec()
|
|
g.spec.Root.Path = path
|
|
}
|
|
|
|
// SetRootReadonly sets g.spec.Root.Readonly.
|
|
func (g *Generator) SetRootReadonly(b bool) {
|
|
g.initSpec()
|
|
g.spec.Root.Readonly = b
|
|
}
|
|
|
|
// SetHostname sets g.spec.Hostname.
|
|
func (g *Generator) SetHostname(s string) {
|
|
g.initSpec()
|
|
g.spec.Hostname = s
|
|
}
|
|
|
|
// ClearAnnotations clears g.spec.Annotations.
|
|
func (g *Generator) ClearAnnotations() {
|
|
if g.spec == nil {
|
|
return
|
|
}
|
|
g.spec.Annotations = make(map[string]string)
|
|
}
|
|
|
|
// AddAnnotation adds an annotation into g.spec.Annotations.
|
|
func (g *Generator) AddAnnotation(key, value string) {
|
|
g.initSpecAnnotations()
|
|
g.spec.Annotations[key] = value
|
|
}
|
|
|
|
// RemoveAnnotation remove an annotation from g.spec.Annotations.
|
|
func (g *Generator) RemoveAnnotation(key string) {
|
|
if g.spec == nil || g.spec.Annotations == nil {
|
|
return
|
|
}
|
|
delete(g.spec.Annotations, key)
|
|
}
|
|
|
|
// SetPlatformOS sets g.spec.Process.OS.
|
|
func (g *Generator) SetPlatformOS(os string) {
|
|
g.initSpec()
|
|
g.spec.Platform.OS = os
|
|
}
|
|
|
|
// SetPlatformArch sets g.spec.Platform.Arch.
|
|
func (g *Generator) SetPlatformArch(arch string) {
|
|
g.initSpec()
|
|
g.spec.Platform.Arch = arch
|
|
}
|
|
|
|
// SetProcessUID sets g.spec.Process.User.UID.
|
|
func (g *Generator) SetProcessUID(uid uint32) {
|
|
g.initSpec()
|
|
g.spec.Process.User.UID = uid
|
|
}
|
|
|
|
// SetProcessGID sets g.spec.Process.User.GID.
|
|
func (g *Generator) SetProcessGID(gid uint32) {
|
|
g.initSpec()
|
|
g.spec.Process.User.GID = gid
|
|
}
|
|
|
|
// SetProcessCwd sets g.spec.Process.Cwd.
|
|
func (g *Generator) SetProcessCwd(cwd string) {
|
|
g.initSpec()
|
|
g.spec.Process.Cwd = cwd
|
|
}
|
|
|
|
// SetProcessNoNewPrivileges sets g.spec.Process.NoNewPrivileges.
|
|
func (g *Generator) SetProcessNoNewPrivileges(b bool) {
|
|
g.initSpec()
|
|
g.spec.Process.NoNewPrivileges = b
|
|
}
|
|
|
|
// SetProcessTerminal sets g.spec.Process.Terminal.
|
|
func (g *Generator) SetProcessTerminal(b bool) {
|
|
g.initSpec()
|
|
g.spec.Process.Terminal = b
|
|
}
|
|
|
|
// SetProcessApparmorProfile sets g.spec.Process.ApparmorProfile.
|
|
func (g *Generator) SetProcessApparmorProfile(prof string) {
|
|
g.initSpec()
|
|
g.spec.Process.ApparmorProfile = prof
|
|
}
|
|
|
|
// SetProcessArgs sets g.spec.Process.Args.
|
|
func (g *Generator) SetProcessArgs(args []string) {
|
|
g.initSpec()
|
|
g.spec.Process.Args = args
|
|
}
|
|
|
|
// ClearProcessEnv clears g.spec.Process.Env.
|
|
func (g *Generator) ClearProcessEnv() {
|
|
if g.spec == nil {
|
|
return
|
|
}
|
|
g.spec.Process.Env = []string{}
|
|
}
|
|
|
|
// AddProcessEnv adds name=value into g.spec.Process.Env, or replaces an
|
|
// existing entry with the given name.
|
|
func (g *Generator) AddProcessEnv(name, value string) {
|
|
g.initSpec()
|
|
|
|
env := fmt.Sprintf("%s=%s", name, value)
|
|
for idx := range g.spec.Process.Env {
|
|
if strings.HasPrefix(g.spec.Process.Env[idx], name+"=") {
|
|
g.spec.Process.Env[idx] = env
|
|
return
|
|
}
|
|
}
|
|
g.spec.Process.Env = append(g.spec.Process.Env, env)
|
|
}
|
|
|
|
// AddProcessRlimits adds rlimit into g.spec.Process.Rlimits.
|
|
func (g *Generator) AddProcessRlimits(rType string, rHard uint64, rSoft uint64) {
|
|
g.initSpec()
|
|
for i, rlimit := range g.spec.Process.Rlimits {
|
|
if rlimit.Type == rType {
|
|
g.spec.Process.Rlimits[i].Hard = rHard
|
|
g.spec.Process.Rlimits[i].Soft = rSoft
|
|
return
|
|
}
|
|
}
|
|
|
|
newRlimit := rspec.LinuxRlimit{
|
|
Type: rType,
|
|
Hard: rHard,
|
|
Soft: rSoft,
|
|
}
|
|
g.spec.Process.Rlimits = append(g.spec.Process.Rlimits, newRlimit)
|
|
}
|
|
|
|
// RemoveProcessRlimits removes a rlimit from g.spec.Process.Rlimits.
|
|
func (g *Generator) RemoveProcessRlimits(rType string) error {
|
|
if g.spec == nil {
|
|
return nil
|
|
}
|
|
for i, rlimit := range g.spec.Process.Rlimits {
|
|
if rlimit.Type == rType {
|
|
g.spec.Process.Rlimits = append(g.spec.Process.Rlimits[:i], g.spec.Process.Rlimits[i+1:]...)
|
|
return nil
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ClearProcessRlimits clear g.spec.Process.Rlimits.
|
|
func (g *Generator) ClearProcessRlimits() {
|
|
if g.spec == nil {
|
|
return
|
|
}
|
|
g.spec.Process.Rlimits = []rspec.LinuxRlimit{}
|
|
}
|
|
|
|
// ClearProcessAdditionalGids clear g.spec.Process.AdditionalGids.
|
|
func (g *Generator) ClearProcessAdditionalGids() {
|
|
if g.spec == nil {
|
|
return
|
|
}
|
|
g.spec.Process.User.AdditionalGids = []uint32{}
|
|
}
|
|
|
|
// AddProcessAdditionalGid adds an additional gid into g.spec.Process.AdditionalGids.
|
|
func (g *Generator) AddProcessAdditionalGid(gid uint32) {
|
|
g.initSpec()
|
|
for _, group := range g.spec.Process.User.AdditionalGids {
|
|
if group == gid {
|
|
return
|
|
}
|
|
}
|
|
g.spec.Process.User.AdditionalGids = append(g.spec.Process.User.AdditionalGids, gid)
|
|
}
|
|
|
|
// SetProcessSelinuxLabel sets g.spec.Process.SelinuxLabel.
|
|
func (g *Generator) SetProcessSelinuxLabel(label string) {
|
|
g.initSpec()
|
|
g.spec.Process.SelinuxLabel = label
|
|
}
|
|
|
|
// SetLinuxCgroupsPath sets g.spec.Linux.CgroupsPath.
|
|
func (g *Generator) SetLinuxCgroupsPath(path string) {
|
|
g.initSpecLinux()
|
|
g.spec.Linux.CgroupsPath = path
|
|
}
|
|
|
|
// SetLinuxMountLabel sets g.spec.Linux.MountLabel.
|
|
func (g *Generator) SetLinuxMountLabel(label string) {
|
|
g.initSpecLinux()
|
|
g.spec.Linux.MountLabel = label
|
|
}
|
|
|
|
// SetLinuxResourcesDisableOOMKiller sets g.spec.Linux.Resources.DisableOOMKiller.
|
|
func (g *Generator) SetLinuxResourcesDisableOOMKiller(disable bool) {
|
|
g.initSpecLinuxResources()
|
|
g.spec.Linux.Resources.DisableOOMKiller = &disable
|
|
}
|
|
|
|
// SetLinuxResourcesOOMScoreAdj sets g.spec.Linux.Resources.OOMScoreAdj.
|
|
func (g *Generator) SetLinuxResourcesOOMScoreAdj(adj int) {
|
|
g.initSpecLinuxResources()
|
|
g.spec.Linux.Resources.OOMScoreAdj = &adj
|
|
}
|
|
|
|
// SetLinuxResourcesCPUShares sets g.spec.Linux.Resources.CPU.Shares.
|
|
func (g *Generator) SetLinuxResourcesCPUShares(shares uint64) {
|
|
g.initSpecLinuxResourcesCPU()
|
|
g.spec.Linux.Resources.CPU.Shares = &shares
|
|
}
|
|
|
|
// SetLinuxResourcesCPUQuota sets g.spec.Linux.Resources.CPU.Quota.
|
|
func (g *Generator) SetLinuxResourcesCPUQuota(quota int64) {
|
|
g.initSpecLinuxResourcesCPU()
|
|
g.spec.Linux.Resources.CPU.Quota = "a
|
|
}
|
|
|
|
// SetLinuxResourcesCPUPeriod sets g.spec.Linux.Resources.CPU.Period.
|
|
func (g *Generator) SetLinuxResourcesCPUPeriod(period uint64) {
|
|
g.initSpecLinuxResourcesCPU()
|
|
g.spec.Linux.Resources.CPU.Period = &period
|
|
}
|
|
|
|
// SetLinuxResourcesCPURealtimeRuntime sets g.spec.Linux.Resources.CPU.RealtimeRuntime.
|
|
func (g *Generator) SetLinuxResourcesCPURealtimeRuntime(time int64) {
|
|
g.initSpecLinuxResourcesCPU()
|
|
g.spec.Linux.Resources.CPU.RealtimeRuntime = &time
|
|
}
|
|
|
|
// SetLinuxResourcesCPURealtimePeriod sets g.spec.Linux.Resources.CPU.RealtimePeriod.
|
|
func (g *Generator) SetLinuxResourcesCPURealtimePeriod(period uint64) {
|
|
g.initSpecLinuxResourcesCPU()
|
|
g.spec.Linux.Resources.CPU.RealtimePeriod = &period
|
|
}
|
|
|
|
// SetLinuxResourcesCPUCpus sets g.spec.Linux.Resources.CPU.Cpus.
|
|
func (g *Generator) SetLinuxResourcesCPUCpus(cpus string) {
|
|
g.initSpecLinuxResourcesCPU()
|
|
g.spec.Linux.Resources.CPU.Cpus = cpus
|
|
}
|
|
|
|
// SetLinuxResourcesCPUMems sets g.spec.Linux.Resources.CPU.Mems.
|
|
func (g *Generator) SetLinuxResourcesCPUMems(mems string) {
|
|
g.initSpecLinuxResourcesCPU()
|
|
g.spec.Linux.Resources.CPU.Mems = mems
|
|
}
|
|
|
|
// SetLinuxResourcesMemoryLimit sets g.spec.Linux.Resources.Memory.Limit.
|
|
func (g *Generator) SetLinuxResourcesMemoryLimit(limit uint64) {
|
|
g.initSpecLinuxResourcesMemory()
|
|
g.spec.Linux.Resources.Memory.Limit = &limit
|
|
}
|
|
|
|
// SetLinuxResourcesMemoryReservation sets g.spec.Linux.Resources.Memory.Reservation.
|
|
func (g *Generator) SetLinuxResourcesMemoryReservation(reservation uint64) {
|
|
g.initSpecLinuxResourcesMemory()
|
|
g.spec.Linux.Resources.Memory.Reservation = &reservation
|
|
}
|
|
|
|
// SetLinuxResourcesMemorySwap sets g.spec.Linux.Resources.Memory.Swap.
|
|
func (g *Generator) SetLinuxResourcesMemorySwap(swap uint64) {
|
|
g.initSpecLinuxResourcesMemory()
|
|
g.spec.Linux.Resources.Memory.Swap = &swap
|
|
}
|
|
|
|
// SetLinuxResourcesMemoryKernel sets g.spec.Linux.Resources.Memory.Kernel.
|
|
func (g *Generator) SetLinuxResourcesMemoryKernel(kernel uint64) {
|
|
g.initSpecLinuxResourcesMemory()
|
|
g.spec.Linux.Resources.Memory.Kernel = &kernel
|
|
}
|
|
|
|
// SetLinuxResourcesMemoryKernelTCP sets g.spec.Linux.Resources.Memory.KernelTCP.
|
|
func (g *Generator) SetLinuxResourcesMemoryKernelTCP(kernelTCP uint64) {
|
|
g.initSpecLinuxResourcesMemory()
|
|
g.spec.Linux.Resources.Memory.KernelTCP = &kernelTCP
|
|
}
|
|
|
|
// SetLinuxResourcesMemorySwappiness sets g.spec.Linux.Resources.Memory.Swappiness.
|
|
func (g *Generator) SetLinuxResourcesMemorySwappiness(swappiness uint64) {
|
|
g.initSpecLinuxResourcesMemory()
|
|
g.spec.Linux.Resources.Memory.Swappiness = &swappiness
|
|
}
|
|
|
|
// SetLinuxResourcesNetworkClassID sets g.spec.Linux.Resources.Network.ClassID.
|
|
func (g *Generator) SetLinuxResourcesNetworkClassID(classid uint32) {
|
|
g.initSpecLinuxResourcesNetwork()
|
|
g.spec.Linux.Resources.Network.ClassID = &classid
|
|
}
|
|
|
|
// AddLinuxResourcesNetworkPriorities adds or sets g.spec.Linux.Resources.Network.Priorities.
|
|
func (g *Generator) AddLinuxResourcesNetworkPriorities(name string, prio uint32) {
|
|
g.initSpecLinuxResourcesNetwork()
|
|
for i, netPriority := range g.spec.Linux.Resources.Network.Priorities {
|
|
if netPriority.Name == name {
|
|
g.spec.Linux.Resources.Network.Priorities[i].Priority = prio
|
|
return
|
|
}
|
|
}
|
|
interfacePrio := new(rspec.LinuxInterfacePriority)
|
|
interfacePrio.Name = name
|
|
interfacePrio.Priority = prio
|
|
g.spec.Linux.Resources.Network.Priorities = append(g.spec.Linux.Resources.Network.Priorities, *interfacePrio)
|
|
}
|
|
|
|
// DropLinuxResourcesNetworkPriorities drops one item from g.spec.Linux.Resources.Network.Priorities.
|
|
func (g *Generator) DropLinuxResourcesNetworkPriorities(name string) {
|
|
g.initSpecLinuxResourcesNetwork()
|
|
for i, netPriority := range g.spec.Linux.Resources.Network.Priorities {
|
|
if netPriority.Name == name {
|
|
g.spec.Linux.Resources.Network.Priorities = append(g.spec.Linux.Resources.Network.Priorities[:i], g.spec.Linux.Resources.Network.Priorities[i+1:]...)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// SetLinuxResourcesPidsLimit sets g.spec.Linux.Resources.Pids.Limit.
|
|
func (g *Generator) SetLinuxResourcesPidsLimit(limit int64) {
|
|
g.initSpecLinuxResourcesPids()
|
|
g.spec.Linux.Resources.Pids.Limit = limit
|
|
}
|
|
|
|
// ClearLinuxSysctl clears g.spec.Linux.Sysctl.
|
|
func (g *Generator) ClearLinuxSysctl() {
|
|
if g.spec == nil || g.spec.Linux == nil {
|
|
return
|
|
}
|
|
g.spec.Linux.Sysctl = make(map[string]string)
|
|
}
|
|
|
|
// AddLinuxSysctl adds a new sysctl config into g.spec.Linux.Sysctl.
|
|
func (g *Generator) AddLinuxSysctl(key, value string) {
|
|
g.initSpecLinuxSysctl()
|
|
g.spec.Linux.Sysctl[key] = value
|
|
}
|
|
|
|
// RemoveLinuxSysctl removes a sysctl config from g.spec.Linux.Sysctl.
|
|
func (g *Generator) RemoveLinuxSysctl(key string) {
|
|
if g.spec == nil || g.spec.Linux == nil || g.spec.Linux.Sysctl == nil {
|
|
return
|
|
}
|
|
delete(g.spec.Linux.Sysctl, key)
|
|
}
|
|
|
|
// ClearLinuxUIDMappings clear g.spec.Linux.UIDMappings.
|
|
func (g *Generator) ClearLinuxUIDMappings() {
|
|
if g.spec == nil || g.spec.Linux == nil {
|
|
return
|
|
}
|
|
g.spec.Linux.UIDMappings = []rspec.LinuxIDMapping{}
|
|
}
|
|
|
|
// AddLinuxUIDMapping adds uidMap into g.spec.Linux.UIDMappings.
|
|
func (g *Generator) AddLinuxUIDMapping(hid, cid, size uint32) {
|
|
idMapping := rspec.LinuxIDMapping{
|
|
HostID: hid,
|
|
ContainerID: cid,
|
|
Size: size,
|
|
}
|
|
|
|
g.initSpecLinux()
|
|
g.spec.Linux.UIDMappings = append(g.spec.Linux.UIDMappings, idMapping)
|
|
}
|
|
|
|
// ClearLinuxGIDMappings clear g.spec.Linux.GIDMappings.
|
|
func (g *Generator) ClearLinuxGIDMappings() {
|
|
if g.spec == nil || g.spec.Linux == nil {
|
|
return
|
|
}
|
|
g.spec.Linux.GIDMappings = []rspec.LinuxIDMapping{}
|
|
}
|
|
|
|
// AddLinuxGIDMapping adds gidMap into g.spec.Linux.GIDMappings.
|
|
func (g *Generator) AddLinuxGIDMapping(hid, cid, size uint32) {
|
|
idMapping := rspec.LinuxIDMapping{
|
|
HostID: hid,
|
|
ContainerID: cid,
|
|
Size: size,
|
|
}
|
|
|
|
g.initSpecLinux()
|
|
g.spec.Linux.GIDMappings = append(g.spec.Linux.GIDMappings, idMapping)
|
|
}
|
|
|
|
// SetLinuxRootPropagation sets g.spec.Linux.RootfsPropagation.
|
|
func (g *Generator) SetLinuxRootPropagation(rp string) error {
|
|
switch rp {
|
|
case "":
|
|
case "private":
|
|
case "rprivate":
|
|
case "slave":
|
|
case "rslave":
|
|
case "shared":
|
|
case "rshared":
|
|
default:
|
|
return fmt.Errorf("rootfs-propagation must be empty or one of private|rprivate|slave|rslave|shared|rshared")
|
|
}
|
|
g.initSpecLinux()
|
|
g.spec.Linux.RootfsPropagation = rp
|
|
return nil
|
|
}
|
|
|
|
// ClearPreStartHooks clear g.spec.Hooks.Prestart.
|
|
func (g *Generator) ClearPreStartHooks() {
|
|
if g.spec == nil {
|
|
return
|
|
}
|
|
g.spec.Hooks.Prestart = []rspec.Hook{}
|
|
}
|
|
|
|
// AddPreStartHook add a prestart hook into g.spec.Hooks.Prestart.
|
|
func (g *Generator) AddPreStartHook(path string, args []string) {
|
|
g.initSpec()
|
|
hook := rspec.Hook{Path: path, Args: args}
|
|
g.spec.Hooks.Prestart = append(g.spec.Hooks.Prestart, hook)
|
|
}
|
|
|
|
// ClearPostStopHooks clear g.spec.Hooks.Poststop.
|
|
func (g *Generator) ClearPostStopHooks() {
|
|
if g.spec == nil {
|
|
return
|
|
}
|
|
g.spec.Hooks.Poststop = []rspec.Hook{}
|
|
}
|
|
|
|
// AddPostStopHook adds a poststop hook into g.spec.Hooks.Poststop.
|
|
func (g *Generator) AddPostStopHook(path string, args []string) {
|
|
g.initSpec()
|
|
hook := rspec.Hook{Path: path, Args: args}
|
|
g.spec.Hooks.Poststop = append(g.spec.Hooks.Poststop, hook)
|
|
}
|
|
|
|
// ClearPostStartHooks clear g.spec.Hooks.Poststart.
|
|
func (g *Generator) ClearPostStartHooks() {
|
|
if g.spec == nil {
|
|
return
|
|
}
|
|
g.spec.Hooks.Poststart = []rspec.Hook{}
|
|
}
|
|
|
|
// AddPostStartHook adds a poststart hook into g.spec.Hooks.Poststart.
|
|
func (g *Generator) AddPostStartHook(path string, args []string) {
|
|
g.initSpec()
|
|
hook := rspec.Hook{Path: path, Args: args}
|
|
g.spec.Hooks.Poststart = append(g.spec.Hooks.Poststart, hook)
|
|
}
|
|
|
|
// AddTmpfsMount adds a tmpfs mount into g.spec.Mounts.
|
|
func (g *Generator) AddTmpfsMount(dest string, options []string) {
|
|
mnt := rspec.Mount{
|
|
Destination: dest,
|
|
Type: "tmpfs",
|
|
Source: "tmpfs",
|
|
Options: options,
|
|
}
|
|
|
|
g.initSpec()
|
|
g.spec.Mounts = append(g.spec.Mounts, mnt)
|
|
}
|
|
|
|
// AddCgroupsMount adds a cgroup mount into g.spec.Mounts.
|
|
func (g *Generator) AddCgroupsMount(mountCgroupOption string) error {
|
|
switch mountCgroupOption {
|
|
case "ro":
|
|
case "rw":
|
|
case "no":
|
|
return nil
|
|
default:
|
|
return fmt.Errorf("--mount-cgroups should be one of (ro,rw,no)")
|
|
}
|
|
|
|
mnt := rspec.Mount{
|
|
Destination: "/sys/fs/cgroup",
|
|
Type: "cgroup",
|
|
Source: "cgroup",
|
|
Options: []string{"nosuid", "noexec", "nodev", "relatime", mountCgroupOption},
|
|
}
|
|
g.initSpec()
|
|
g.spec.Mounts = append(g.spec.Mounts, mnt)
|
|
|
|
return nil
|
|
}
|
|
|
|
// AddBindMount adds a bind mount into g.spec.Mounts.
|
|
func (g *Generator) AddBindMount(source, dest string, options []string) {
|
|
if len(options) == 0 {
|
|
options = []string{"rw"}
|
|
}
|
|
|
|
// We have to make sure that there is a bind option set, otherwise it won't
|
|
// be an actual bindmount.
|
|
foundBindOption := false
|
|
for _, opt := range options {
|
|
if opt == "bind" || opt == "rbind" {
|
|
foundBindOption = true
|
|
break
|
|
}
|
|
}
|
|
if !foundBindOption {
|
|
options = append(options, "bind")
|
|
}
|
|
|
|
mnt := rspec.Mount{
|
|
Destination: dest,
|
|
Type: "bind",
|
|
Source: source,
|
|
Options: options,
|
|
}
|
|
g.initSpec()
|
|
g.spec.Mounts = append(g.spec.Mounts, mnt)
|
|
}
|
|
|
|
// SetupPrivileged sets up the privilege-related fields inside g.spec.
|
|
func (g *Generator) SetupPrivileged(privileged bool) {
|
|
if privileged { // Add all capabilities in privileged mode.
|
|
var finalCapList []string
|
|
for _, cap := range capability.List() {
|
|
if g.HostSpecific && cap > validate.LastCap() {
|
|
continue
|
|
}
|
|
finalCapList = append(finalCapList, fmt.Sprintf("CAP_%s", strings.ToUpper(cap.String())))
|
|
}
|
|
g.initSpecLinux()
|
|
g.spec.Process.Capabilities.Bounding = finalCapList
|
|
g.spec.Process.Capabilities.Effective = finalCapList
|
|
g.spec.Process.Capabilities.Inheritable = finalCapList
|
|
g.spec.Process.Capabilities.Permitted = finalCapList
|
|
g.spec.Process.Capabilities.Ambient = finalCapList
|
|
g.spec.Process.SelinuxLabel = ""
|
|
g.spec.Process.ApparmorProfile = ""
|
|
g.spec.Linux.Seccomp = nil
|
|
}
|
|
}
|
|
|
|
// ClearProcessCapabilities clear g.spec.Process.Capabilities.
|
|
func (g *Generator) ClearProcessCapabilities() {
|
|
if g.spec == nil {
|
|
return
|
|
}
|
|
g.spec.Process.Capabilities.Bounding = []string{}
|
|
g.spec.Process.Capabilities.Effective = []string{}
|
|
g.spec.Process.Capabilities.Inheritable = []string{}
|
|
g.spec.Process.Capabilities.Permitted = []string{}
|
|
g.spec.Process.Capabilities.Ambient = []string{}
|
|
}
|
|
|
|
// AddProcessCapability adds a process capability into g.spec.Process.Capabilities.
|
|
func (g *Generator) AddProcessCapability(c string) error {
|
|
cp := strings.ToUpper(c)
|
|
if err := validate.CapValid(cp, g.HostSpecific); err != nil {
|
|
return err
|
|
}
|
|
|
|
g.initSpec()
|
|
|
|
for _, cap := range g.spec.Process.Capabilities.Bounding {
|
|
if strings.ToUpper(cap) == cp {
|
|
return nil
|
|
}
|
|
}
|
|
g.spec.Process.Capabilities.Bounding = append(g.spec.Process.Capabilities.Bounding, cp)
|
|
|
|
for _, cap := range g.spec.Process.Capabilities.Effective {
|
|
if strings.ToUpper(cap) == cp {
|
|
return nil
|
|
}
|
|
}
|
|
g.spec.Process.Capabilities.Effective = append(g.spec.Process.Capabilities.Effective, cp)
|
|
|
|
for _, cap := range g.spec.Process.Capabilities.Inheritable {
|
|
if strings.ToUpper(cap) == cp {
|
|
return nil
|
|
}
|
|
}
|
|
g.spec.Process.Capabilities.Inheritable = append(g.spec.Process.Capabilities.Inheritable, cp)
|
|
|
|
for _, cap := range g.spec.Process.Capabilities.Permitted {
|
|
if strings.ToUpper(cap) == cp {
|
|
return nil
|
|
}
|
|
}
|
|
g.spec.Process.Capabilities.Permitted = append(g.spec.Process.Capabilities.Permitted, cp)
|
|
|
|
for _, cap := range g.spec.Process.Capabilities.Ambient {
|
|
if strings.ToUpper(cap) == cp {
|
|
return nil
|
|
}
|
|
}
|
|
g.spec.Process.Capabilities.Ambient = append(g.spec.Process.Capabilities.Ambient, cp)
|
|
|
|
return nil
|
|
}
|
|
|
|
// DropProcessCapability drops a process capability from g.spec.Process.Capabilities.
|
|
func (g *Generator) DropProcessCapability(c string) error {
|
|
cp := strings.ToUpper(c)
|
|
if err := validate.CapValid(cp, g.HostSpecific); err != nil {
|
|
return err
|
|
}
|
|
|
|
g.initSpec()
|
|
|
|
for i, cap := range g.spec.Process.Capabilities.Bounding {
|
|
if strings.ToUpper(cap) == cp {
|
|
g.spec.Process.Capabilities.Bounding = append(g.spec.Process.Capabilities.Bounding[:i], g.spec.Process.Capabilities.Bounding[i+1:]...)
|
|
return nil
|
|
}
|
|
}
|
|
|
|
for i, cap := range g.spec.Process.Capabilities.Effective {
|
|
if strings.ToUpper(cap) == cp {
|
|
g.spec.Process.Capabilities.Effective = append(g.spec.Process.Capabilities.Effective[:i], g.spec.Process.Capabilities.Effective[i+1:]...)
|
|
return nil
|
|
}
|
|
}
|
|
|
|
for i, cap := range g.spec.Process.Capabilities.Inheritable {
|
|
if strings.ToUpper(cap) == cp {
|
|
g.spec.Process.Capabilities.Inheritable = append(g.spec.Process.Capabilities.Inheritable[:i], g.spec.Process.Capabilities.Inheritable[i+1:]...)
|
|
return nil
|
|
}
|
|
}
|
|
|
|
for i, cap := range g.spec.Process.Capabilities.Permitted {
|
|
if strings.ToUpper(cap) == cp {
|
|
g.spec.Process.Capabilities.Permitted = append(g.spec.Process.Capabilities.Permitted[:i], g.spec.Process.Capabilities.Permitted[i+1:]...)
|
|
return nil
|
|
}
|
|
}
|
|
|
|
for i, cap := range g.spec.Process.Capabilities.Ambient {
|
|
if strings.ToUpper(cap) == cp {
|
|
g.spec.Process.Capabilities.Ambient = append(g.spec.Process.Capabilities.Ambient[:i], g.spec.Process.Capabilities.Ambient[i+1:]...)
|
|
return nil
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func mapStrToNamespace(ns string, path string) (rspec.LinuxNamespace, error) {
|
|
switch ns {
|
|
case "network":
|
|
return rspec.LinuxNamespace{Type: rspec.NetworkNamespace, Path: path}, nil
|
|
case "pid":
|
|
return rspec.LinuxNamespace{Type: rspec.PIDNamespace, Path: path}, nil
|
|
case "mount":
|
|
return rspec.LinuxNamespace{Type: rspec.MountNamespace, Path: path}, nil
|
|
case "ipc":
|
|
return rspec.LinuxNamespace{Type: rspec.IPCNamespace, Path: path}, nil
|
|
case "uts":
|
|
return rspec.LinuxNamespace{Type: rspec.UTSNamespace, Path: path}, nil
|
|
case "user":
|
|
return rspec.LinuxNamespace{Type: rspec.UserNamespace, Path: path}, nil
|
|
case "cgroup":
|
|
return rspec.LinuxNamespace{Type: rspec.CgroupNamespace, Path: path}, nil
|
|
default:
|
|
return rspec.LinuxNamespace{}, fmt.Errorf("Should not reach here!")
|
|
}
|
|
}
|
|
|
|
// ClearLinuxNamespaces clear g.spec.Linux.Namespaces.
|
|
func (g *Generator) ClearLinuxNamespaces() {
|
|
if g.spec == nil || g.spec.Linux == nil {
|
|
return
|
|
}
|
|
g.spec.Linux.Namespaces = []rspec.LinuxNamespace{}
|
|
}
|
|
|
|
// AddOrReplaceLinuxNamespace adds or replaces a namespace inside
|
|
// g.spec.Linux.Namespaces.
|
|
func (g *Generator) AddOrReplaceLinuxNamespace(ns string, path string) error {
|
|
namespace, err := mapStrToNamespace(ns, path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
g.initSpecLinux()
|
|
for i, ns := range g.spec.Linux.Namespaces {
|
|
if ns.Type == namespace.Type {
|
|
g.spec.Linux.Namespaces[i] = namespace
|
|
return nil
|
|
}
|
|
}
|
|
g.spec.Linux.Namespaces = append(g.spec.Linux.Namespaces, namespace)
|
|
return nil
|
|
}
|
|
|
|
// RemoveLinuxNamespace removes a namespace from g.spec.Linux.Namespaces.
|
|
func (g *Generator) RemoveLinuxNamespace(ns string) error {
|
|
namespace, err := mapStrToNamespace(ns, "")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if g.spec == nil || g.spec.Linux == nil {
|
|
return nil
|
|
}
|
|
for i, ns := range g.spec.Linux.Namespaces {
|
|
if ns.Type == namespace.Type {
|
|
g.spec.Linux.Namespaces = append(g.spec.Linux.Namespaces[:i], g.spec.Linux.Namespaces[i+1:]...)
|
|
return nil
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// AddDevice - add a device into g.spec.Linux.Devices
|
|
func (g *Generator) AddDevice(device rspec.LinuxDevice) {
|
|
g.initSpecLinux()
|
|
|
|
for i, dev := range g.spec.Linux.Devices {
|
|
if dev.Path == device.Path {
|
|
g.spec.Linux.Devices[i] = device
|
|
return
|
|
}
|
|
if dev.Type == device.Type && dev.Major == device.Major && dev.Minor == device.Minor {
|
|
fmt.Fprintln(os.Stderr, "WARNING: The same type, major and minor should not be used for multiple devices.")
|
|
}
|
|
}
|
|
|
|
g.spec.Linux.Devices = append(g.spec.Linux.Devices, device)
|
|
}
|
|
|
|
//RemoveDevice remove a device from g.spec.Linux.Devices
|
|
func (g *Generator) RemoveDevice(path string) error {
|
|
if g.spec == nil || g.spec.Linux == nil || g.spec.Linux.Devices == nil {
|
|
return nil
|
|
}
|
|
|
|
for i, device := range g.spec.Linux.Devices {
|
|
if device.Path == path {
|
|
g.spec.Linux.Devices = append(g.spec.Linux.Devices[:i], g.spec.Linux.Devices[i+1:]...)
|
|
return nil
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (g *Generator) ClearLinuxDevices() {
|
|
if g.spec == nil || g.spec.Linux == nil || g.spec.Linux.Devices == nil {
|
|
return
|
|
}
|
|
|
|
g.spec.Linux.Devices = []rspec.LinuxDevice{}
|
|
}
|
|
|
|
// strPtr returns the pointer pointing to the string s.
|
|
func strPtr(s string) *string { return &s }
|
|
|
|
// SetSyscallAction adds rules for syscalls with the specified action
|
|
func (g *Generator) SetSyscallAction(arguments seccomp.SyscallOpts) error {
|
|
g.initSpecLinuxSeccomp()
|
|
return seccomp.ParseSyscallFlag(arguments, g.spec.Linux.Seccomp)
|
|
}
|
|
|
|
// SetDefaultSeccompAction sets the default action for all syscalls not defined
|
|
// and then removes any syscall rules with this action already specified.
|
|
func (g *Generator) SetDefaultSeccompAction(action string) error {
|
|
g.initSpecLinuxSeccomp()
|
|
return seccomp.ParseDefaultAction(action, g.spec.Linux.Seccomp)
|
|
}
|
|
|
|
// SetDefaultSeccompActionForce only sets the default action for all syscalls not defined
|
|
func (g *Generator) SetDefaultSeccompActionForce(action string) error {
|
|
g.initSpecLinuxSeccomp()
|
|
return seccomp.ParseDefaultActionForce(action, g.spec.Linux.Seccomp)
|
|
}
|
|
|
|
// SetSeccompArchitecture sets the supported seccomp architectures
|
|
func (g *Generator) SetSeccompArchitecture(architecture string) error {
|
|
g.initSpecLinuxSeccomp()
|
|
return seccomp.ParseArchitectureFlag(architecture, g.spec.Linux.Seccomp)
|
|
}
|
|
|
|
// RemoveSeccompRule removes rules for any specified syscalls
|
|
func (g *Generator) RemoveSeccompRule(arguments string) error {
|
|
g.initSpecLinuxSeccomp()
|
|
return seccomp.RemoveAction(arguments, g.spec.Linux.Seccomp)
|
|
}
|
|
|
|
// RemoveAllSeccompRules removes all syscall rules
|
|
func (g *Generator) RemoveAllSeccompRules() error {
|
|
g.initSpecLinuxSeccomp()
|
|
return seccomp.RemoveAllSeccompRules(g.spec.Linux.Seccomp)
|
|
}
|
|
|
|
// AddLinuxMaskedPaths adds masked paths into g.spec.Linux.MaskedPaths.
|
|
func (g *Generator) AddLinuxMaskedPaths(path string) {
|
|
g.initSpecLinux()
|
|
g.spec.Linux.MaskedPaths = append(g.spec.Linux.MaskedPaths, path)
|
|
}
|
|
|
|
// AddLinuxReadonlyPaths adds readonly paths into g.spec.Linux.MaskedPaths.
|
|
func (g *Generator) AddLinuxReadonlyPaths(path string) {
|
|
g.initSpecLinux()
|
|
g.spec.Linux.ReadonlyPaths = append(g.spec.Linux.ReadonlyPaths, path)
|
|
}
|