cri-o/cmd/ocid/main.go
Mrunal Patel 22babd5bcd Bump up to version 0.3
Signed-off-by: Mrunal Patel <mpatel@redhat.com>
2017-04-28 08:13:00 -07:00

331 lines
7.8 KiB
Go

package main
import (
"fmt"
"net"
"os"
"os/signal"
"sort"
"strings"
"syscall"
"runtime/pprof"
"github.com/Sirupsen/logrus"
"github.com/containers/storage/pkg/reexec"
"github.com/kubernetes-incubator/cri-o/server"
"github.com/opencontainers/selinux/go-selinux"
"github.com/urfave/cli"
"google.golang.org/grpc"
"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
)
const ociConfigPath = "/etc/ocid/ocid.conf"
func mergeConfig(config *server.Config, ctx *cli.Context) error {
// Don't parse the config if the user explicitly set it to "".
if path := ctx.GlobalString("config"); path != "" {
if err := config.FromFile(path); err != nil {
if ctx.GlobalIsSet("config") || !os.IsNotExist(err) {
return err
}
// We don't error out if --config wasn't explicitly set and the
// default doesn't exist. But we will log a warning about it, so
// the user doesn't miss it.
logrus.Warnf("default configuration file does not exist: %s", ociConfigPath)
}
}
// Override options set with the CLI.
if ctx.GlobalIsSet("conmon") {
config.Conmon = ctx.GlobalString("conmon")
}
if ctx.GlobalIsSet("pause-command") {
config.PauseCommand = ctx.GlobalString("pause-command")
}
if ctx.GlobalIsSet("pause-image") {
config.PauseImage = ctx.GlobalString("pause-image")
}
if ctx.GlobalIsSet("signature-policy") {
config.SignaturePolicyPath = ctx.GlobalString("signature-policy")
}
if ctx.GlobalIsSet("root") {
config.Root = ctx.GlobalString("root")
}
if ctx.GlobalIsSet("runroot") {
config.RunRoot = ctx.GlobalString("runroot")
}
if ctx.GlobalIsSet("storage-driver") {
config.Storage = ctx.GlobalString("storage-driver")
}
if ctx.GlobalIsSet("storage-opt") {
config.StorageOptions = ctx.GlobalStringSlice("storage-opt")
}
if ctx.GlobalIsSet("default-transport") {
config.DefaultTransport = ctx.GlobalString("default-transport")
}
if ctx.GlobalIsSet("listen") {
config.Listen = ctx.GlobalString("listen")
}
if ctx.GlobalIsSet("runtime") {
config.Runtime = ctx.GlobalString("runtime")
}
if ctx.GlobalIsSet("selinux") {
config.SELinux = ctx.GlobalBool("selinux")
}
if ctx.GlobalIsSet("seccomp-profile") {
config.SeccompProfile = ctx.GlobalString("seccomp-profile")
}
if ctx.GlobalIsSet("apparmor-profile") {
config.ApparmorProfile = ctx.GlobalString("apparmor-profile")
}
if ctx.GlobalIsSet("cgroup-manager") {
config.CgroupManager = ctx.GlobalString("cgroup-manager")
}
if ctx.GlobalIsSet("cni-config-dir") {
config.NetworkDir = ctx.GlobalString("cni-config-dir")
}
if ctx.GlobalIsSet("cni-plugin-dir") {
config.PluginDir = ctx.GlobalString("cni-plugin-dir")
}
return nil
}
func catchShutdown(gserver *grpc.Server, sserver *server.Server, signalled *bool) {
sig := make(chan os.Signal, 10)
signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
go func() {
for s := range sig {
switch s {
case syscall.SIGINT:
logrus.Debugf("Caught SIGINT")
case syscall.SIGTERM:
logrus.Debugf("Caught SIGTERM")
default:
continue
}
*signalled = true
gserver.GracefulStop()
return
}
}()
}
func main() {
if reexec.Init() {
return
}
app := cli.NewApp()
app.Name = "ocid"
app.Usage = "ocid server"
app.Version = "0.3"
app.Metadata = map[string]interface{}{
"config": server.DefaultConfig(),
}
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "config",
Value: ociConfigPath,
Usage: "path to configuration file",
},
cli.StringFlag{
Name: "conmon",
Usage: "path to the conmon executable",
},
cli.BoolFlag{
Name: "debug",
Usage: "enable debug output for logging",
},
cli.StringFlag{
Name: "listen",
Usage: "path to ocid socket",
},
cli.StringFlag{
Name: "log",
Value: "",
Usage: "set the log file path where internal debug information is written",
},
cli.StringFlag{
Name: "log-format",
Value: "text",
Usage: "set the format used by logs ('text' (default), or 'json')",
},
cli.StringFlag{
Name: "pause-command",
Usage: "name of the pause command in the pause image",
},
cli.StringFlag{
Name: "pause-image",
Usage: "name of the pause image",
},
cli.StringFlag{
Name: "signature-policy",
Usage: "path to signature policy file",
},
cli.StringFlag{
Name: "root",
Usage: "ocid root dir",
},
cli.StringFlag{
Name: "runroot",
Usage: "ocid state dir",
},
cli.StringFlag{
Name: "storage-driver",
Usage: "storage driver",
},
cli.StringSliceFlag{
Name: "storage-opt",
Usage: "storage driver option",
},
cli.StringFlag{
Name: "default-transport",
Usage: "default transport",
},
cli.StringFlag{
Name: "runtime",
Usage: "OCI runtime path",
},
cli.StringFlag{
Name: "seccomp-profile",
Usage: "default seccomp profile path",
},
cli.StringFlag{
Name: "apparmor-profile",
Usage: "default apparmor profile name (default: \"ocid-default\")",
},
cli.BoolFlag{
Name: "selinux",
Usage: "enable selinux support",
},
cli.StringFlag{
Name: "cgroup-manager",
Usage: "cgroup manager (cgroupfs or systemd)",
},
cli.StringFlag{
Name: "cni-config-dir",
Usage: "CNI configuration files directory",
},
cli.StringFlag{
Name: "cni-plugin-dir",
Usage: "CNI plugin binaries directory",
},
cli.StringFlag{
Name: "cpu-profile",
Usage: "set the CPU profile file path",
},
}
sort.Sort(cli.FlagsByName(app.Flags))
sort.Sort(cli.FlagsByName(configCommand.Flags))
app.Commands = []cli.Command{
configCommand,
}
app.Before = func(c *cli.Context) error {
// Load the configuration file.
config := c.App.Metadata["config"].(*server.Config)
if err := mergeConfig(config, c); err != nil {
return err
}
cf := &logrus.TextFormatter{
TimestampFormat: "2006-01-02 15:04:05.000000000Z07:00",
FullTimestamp: true,
}
logrus.SetFormatter(cf)
if c.GlobalBool("debug") {
logrus.SetLevel(logrus.DebugLevel)
}
if path := c.GlobalString("log"); path != "" {
f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY|os.O_APPEND|os.O_SYNC, 0666)
if err != nil {
return err
}
logrus.SetOutput(f)
}
switch c.GlobalString("log-format") {
case "text":
// retain logrus's default.
case "json":
logrus.SetFormatter(new(logrus.JSONFormatter))
default:
return fmt.Errorf("unknown log-format %q", c.GlobalString("log-format"))
}
return nil
}
app.Action = func(c *cli.Context) error {
if cp := c.GlobalString("cpu-profile"); cp != "" {
f, err := os.Create(cp)
if err != nil {
return fmt.Errorf("invalid --cpu-profile value %q", err)
}
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
config := c.App.Metadata["config"].(*server.Config)
if !config.SELinux {
selinux.SetDisabled()
}
if _, err := os.Stat(config.Runtime); os.IsNotExist(err) {
// path to runtime does not exist
return fmt.Errorf("invalid --runtime value %q", err)
}
// Remove the socket if it already exists
if _, err := os.Stat(config.Listen); err == nil {
if err := os.Remove(config.Listen); err != nil {
logrus.Fatal(err)
}
}
lis, err := net.Listen("unix", config.Listen)
if err != nil {
logrus.Fatalf("failed to listen: %v", err)
}
s := grpc.NewServer()
service, err := server.New(config)
if err != nil {
logrus.Fatal(err)
}
graceful := false
catchShutdown(s, service, &graceful)
runtime.RegisterRuntimeServiceServer(s, service)
runtime.RegisterImageServiceServer(s, service)
// after the daemon is done setting up we can notify systemd api
notifySystem()
err = s.Serve(lis)
if graceful && strings.Contains(strings.ToLower(err.Error()), "use of closed network connection") {
err = nil
}
if err2 := service.Shutdown(); err2 != nil {
logrus.Infof("error shutting down layer storage: %v", err2)
}
if err != nil {
logrus.Fatal(err)
}
return nil
}
if err := app.Run(os.Args); err != nil {
logrus.Fatal(err)
}
}