package main import ( "fmt" "os" "github.com/Sirupsen/logrus" "github.com/docker/docker/cli" cliflags "github.com/docker/docker/cli/flags" "github.com/docker/docker/daemon" "github.com/docker/docker/dockerversion" "github.com/docker/docker/pkg/reexec" "github.com/docker/docker/pkg/term" "github.com/docker/docker/utils" "github.com/spf13/cobra" "github.com/spf13/pflag" ) type daemonOptions struct { version bool configFile string daemonConfig *daemon.Config common *cliflags.CommonOptions flags *pflag.FlagSet } func newDaemonCommand() *cobra.Command { opts := daemonOptions{ daemonConfig: daemon.NewConfig(), common: cliflags.NewCommonOptions(), } cmd := &cobra.Command{ Use: "dockerd [OPTIONS]", Short: "A self-sufficient runtime for containers.", SilenceUsage: true, SilenceErrors: true, Args: cli.NoArgs, RunE: func(cmd *cobra.Command, args []string) error { opts.flags = cmd.Flags() return runDaemon(opts) }, } cli.SetupRootCommand(cmd) flags := cmd.Flags() flags.BoolVarP(&opts.version, "version", "v", false, "Print version information and quit") flags.StringVar(&opts.configFile, flagDaemonConfigFile, defaultDaemonConfigFile, "Daemon configuration file") opts.common.InstallFlags(flags) opts.daemonConfig.InstallFlags(flags) installServiceFlags(flags) return cmd } func runDaemon(opts daemonOptions) error { if opts.version { showVersion() return nil } daemonCli := NewDaemonCli() // On Windows, this may be launching as a service or with an option to // register the service. stop, err := initService(daemonCli) if err != nil { logrus.Fatal(err) } if stop { return nil } err = daemonCli.start(opts) notifyShutdown(err) return err } func showVersion() { if utils.ExperimentalBuild() { fmt.Printf("Docker version %s, build %s, experimental\n", dockerversion.Version, dockerversion.GitCommit) } else { fmt.Printf("Docker version %s, build %s\n", dockerversion.Version, dockerversion.GitCommit) } } func main() { if reexec.Init() { return } // Set terminal emulation based on platform as required. _, stdout, stderr := term.StdStreams() logrus.SetOutput(stderr) cmd := newDaemonCommand() cmd.SetOutput(stdout) if err := cmd.Execute(); err != nil { fmt.Fprintf(stderr, "%s\n", err) os.Exit(1) } }