github.com/rawahars/moby@v24.0.4+incompatible/cmd/dockerd/docker.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"os/signal"
     7  	"syscall"
     8  
     9  	"github.com/docker/docker/daemon/config"
    10  	"github.com/docker/docker/dockerversion"
    11  	"github.com/docker/docker/pkg/jsonmessage"
    12  	"github.com/docker/docker/pkg/reexec"
    13  	"github.com/docker/docker/pkg/rootless"
    14  	"github.com/moby/buildkit/util/apicaps"
    15  	"github.com/moby/term"
    16  	"github.com/sirupsen/logrus"
    17  	"github.com/spf13/cobra"
    18  )
    19  
    20  var (
    21  	honorXDG bool
    22  )
    23  
    24  func newDaemonCommand() (*cobra.Command, error) {
    25  	cfg, err := config.New()
    26  	if err != nil {
    27  		return nil, err
    28  	}
    29  	opts := newDaemonOptions(cfg)
    30  
    31  	cmd := &cobra.Command{
    32  		Use:           "dockerd [OPTIONS]",
    33  		Short:         "A self-sufficient runtime for containers.",
    34  		SilenceUsage:  true,
    35  		SilenceErrors: true,
    36  		Args:          NoArgs,
    37  		RunE: func(cmd *cobra.Command, args []string) error {
    38  			opts.flags = cmd.Flags()
    39  			return runDaemon(opts)
    40  		},
    41  		DisableFlagsInUseLine: true,
    42  		Version:               fmt.Sprintf("%s, build %s", dockerversion.Version, dockerversion.GitCommit),
    43  	}
    44  	SetupRootCommand(cmd)
    45  
    46  	flags := cmd.Flags()
    47  	flags.BoolP("version", "v", false, "Print version information and quit")
    48  	defaultDaemonConfigFile, err := getDefaultDaemonConfigFile()
    49  	if err != nil {
    50  		return nil, err
    51  	}
    52  	flags.StringVar(&opts.configFile, "config-file", defaultDaemonConfigFile, "Daemon configuration file")
    53  	configureCertsDir()
    54  	opts.installFlags(flags)
    55  	if err := installConfigFlags(opts.daemonConfig, flags); err != nil {
    56  		return nil, err
    57  	}
    58  	installServiceFlags(flags)
    59  
    60  	return cmd, nil
    61  }
    62  
    63  func init() {
    64  	if dockerversion.ProductName != "" {
    65  		apicaps.ExportedProduct = dockerversion.ProductName
    66  	}
    67  	// When running with RootlessKit, $XDG_RUNTIME_DIR, $XDG_DATA_HOME, and $XDG_CONFIG_HOME needs to be
    68  	// honored as the default dirs, because we are unlikely to have permissions to access the system-wide
    69  	// directories.
    70  	//
    71  	// Note that even running with --rootless, when not running with RootlessKit, honorXDG needs to be kept false,
    72  	// because the system-wide directories in the current mount namespace are expected to be accessible.
    73  	// ("rootful" dockerd in rootless dockerd, #38702)
    74  	honorXDG = rootless.RunningWithRootlessKit()
    75  }
    76  
    77  func main() {
    78  	if reexec.Init() {
    79  		return
    80  	}
    81  
    82  	// Ignore SIGPIPE events. These are generated by systemd when journald is restarted while
    83  	// the docker daemon is not restarted and also running under systemd.
    84  	// Fixes https://github.com/docker/docker/issues/19728
    85  	signal.Ignore(syscall.SIGPIPE)
    86  
    87  	// initial log formatting; this setting is updated after the daemon configuration is loaded.
    88  	logrus.SetFormatter(&logrus.TextFormatter{
    89  		TimestampFormat: jsonmessage.RFC3339NanoFixed,
    90  		FullTimestamp:   true,
    91  	})
    92  
    93  	// Set terminal emulation based on platform as required.
    94  	_, stdout, stderr := term.StdStreams()
    95  
    96  	initLogging(stdout, stderr)
    97  	configureGRPCLog()
    98  
    99  	onError := func(err error) {
   100  		fmt.Fprintf(stderr, "%s\n", err)
   101  		os.Exit(1)
   102  	}
   103  
   104  	cmd, err := newDaemonCommand()
   105  	if err != nil {
   106  		onError(err)
   107  	}
   108  	cmd.SetOut(stdout)
   109  	if err := cmd.Execute(); err != nil {
   110  		onError(err)
   111  	}
   112  }