github.com/Heebron/moby@v0.0.0-20221111184709-6eab4f55faf7/cmd/dockerd/docker.go (about)

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