127 lines
3.4 KiB
Go
127 lines
3.4 KiB
Go
package main
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import (
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"fmt"
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"os"
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"strings"
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"github.com/Sirupsen/logrus"
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"github.com/codegangsta/cli"
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"github.com/opencontainers/runtime-spec/specs-go"
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)
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// gitCommit will be the hash that the binary was built from
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// and will be populated by the Makefile
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var gitCommit = ""
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const (
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version = "0.1.0"
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specConfig = "config.json"
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usage = `Open Container Initiative runtime
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runc is a command line client for running applications packaged according to
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the Open Container Format (OCF) and is a compliant implementation of the
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Open Container Initiative specification.
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runc integrates well with existing process supervisors to provide a production
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container runtime environment for applications. It can be used with your
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existing process monitoring tools and the container will be spawned as a
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direct child of the process supervisor.
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Containers are configured using bundles. A bundle for a container is a directory
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that includes a specification file named "` + specConfig + `" and a root filesystem.
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The root filesystem contains the contents of the container.
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To start a new instance of a container:
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# runc start [ -b bundle ] <container-id>
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Where "<container-id>" is your name for the instance of the container that you
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are starting. The name you provide for the container instance must be unique on
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your host. Providing the bundle directory using "-b" is optional. The default
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value for "bundle" is the current directory.`
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)
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func main() {
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app := cli.NewApp()
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app.Name = "runc"
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app.Usage = usage
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v := []string{
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version,
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}
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if gitCommit != "" {
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v = append(v, fmt.Sprintf("commit: %s", gitCommit))
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}
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v = append(v, fmt.Sprintf("spec: %s", specs.Version))
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app.Version = strings.Join(v, "\n")
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app.Flags = []cli.Flag{
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cli.BoolFlag{
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Name: "debug",
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Usage: "enable debug output for logging",
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},
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cli.StringFlag{
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Name: "log",
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Value: "/dev/null",
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Usage: "set the log file path where internal debug information is written",
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},
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cli.StringFlag{
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Name: "log-format",
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Value: "text",
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Usage: "set the format used by logs ('text' (default), or 'json')",
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},
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cli.StringFlag{
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Name: "root",
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Value: "/run/runc",
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Usage: "root directory for storage of container state (this should be located in tmpfs)",
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},
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cli.StringFlag{
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Name: "criu",
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Value: "criu",
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Usage: "path to the criu binary used for checkpoint and restore",
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},
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cli.BoolFlag{
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Name: "systemd-cgroup",
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Usage: "enable systemd cgroup support, expects cgroupsPath to be of form \"slice:prefix:name\" for e.g. \"system.slice:runc:434234\"",
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},
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}
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app.Commands = []cli.Command{
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checkpointCommand,
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deleteCommand,
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eventsCommand,
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execCommand,
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initCommand,
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killCommand,
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listCommand,
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pauseCommand,
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restoreCommand,
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resumeCommand,
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specCommand,
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startCommand,
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stateCommand,
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}
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app.Before = func(context *cli.Context) error {
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if context.GlobalBool("debug") {
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logrus.SetLevel(logrus.DebugLevel)
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}
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if path := context.GlobalString("log"); path != "" {
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f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY|os.O_APPEND|os.O_SYNC, 0666)
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if err != nil {
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return err
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}
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logrus.SetOutput(f)
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}
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switch context.GlobalString("log-format") {
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case "text":
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// retain logrus's default.
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case "json":
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logrus.SetFormatter(new(logrus.JSONFormatter))
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default:
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logrus.Fatalf("unknown log-format %q", context.GlobalString("log-format"))
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}
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return nil
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}
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if err := app.Run(os.Args); err != nil {
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fatal(err)
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}
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}
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