113 lines
2.4 KiB
Go
113 lines
2.4 KiB
Go
package main
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import (
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"net"
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"os"
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"sync"
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"time"
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"google.golang.org/grpc"
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"github.com/Sirupsen/logrus"
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"github.com/codegangsta/cli"
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"github.com/docker/containerd"
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"github.com/docker/containerd/api/grpc/server"
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"github.com/docker/containerd/api/grpc/types"
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"github.com/docker/containerd/supervisor"
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)
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const (
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usage = `High performance container daemon`
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minRlimit = 1024
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)
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var daemonFlags = []cli.Flag{
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cli.BoolFlag{
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Name: "debug",
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Usage: "enable debug output in the logs",
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},
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cli.StringFlag{
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Name: "state-dir",
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Value: defaultStateDir,
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Usage: "runtime state directory",
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},
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cli.DurationFlag{
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Name: "metrics-interval",
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Value: 120 * time.Second,
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Usage: "interval for flushing metrics to the store",
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},
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cli.StringFlag{
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Name: "listen,l",
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Value: defaultGRPCEndpoint,
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Usage: "Address on which GRPC API will listen",
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},
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cli.StringFlag{
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Name: "runtime,r",
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Value: "runc",
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Usage: "name of the OCI compliant runtime to use when executing containers",
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},
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}
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func main() {
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appendPlatformFlags()
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app := cli.NewApp()
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app.Name = "containerd"
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app.Version = containerd.Version
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app.Usage = usage
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app.Flags = daemonFlags
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setAppBefore(app)
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app.Action = func(context *cli.Context) {
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if err := daemon(
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context.String("listen"),
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context.String("state-dir"),
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10,
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context.String("runtime"),
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); err != nil {
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logrus.Fatal(err)
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}
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}
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if err := app.Run(os.Args); err != nil {
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logrus.Fatal(err)
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}
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}
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func daemon(address, stateDir string, concurrency int, runtimeName string) error {
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// setup a standard reaper so that we don't leave any zombies if we are still alive
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// this is just good practice because we are spawning new processes
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go reapProcesses()
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sv, err := supervisor.New(stateDir, runtimeName)
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if err != nil {
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return err
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}
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wg := &sync.WaitGroup{}
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for i := 0; i < concurrency; i++ {
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wg.Add(1)
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w := supervisor.NewWorker(sv, wg)
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go w.Start()
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}
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if err := sv.Start(); err != nil {
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return err
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}
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if err := os.RemoveAll(address); err != nil {
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return err
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}
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l, err := net.Listen(defaultListenType, address)
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if err != nil {
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return err
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}
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s := grpc.NewServer()
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types.RegisterAPIServer(s, server.NewServer(sv))
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logrus.Debugf("containerd: grpc api on %s", address)
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return s.Serve(l)
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}
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// getDefaultID returns the hostname for the instance host
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func getDefaultID() string {
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hostname, err := os.Hostname()
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if err != nil {
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panic(err)
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}
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return hostname
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}
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