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d761d9d358
This package is used internally by the daemon, and was only used out side of the daemon by pkg/plugins (for which we still need to look where it should be kept). Making it internal because it's trivial to implement if needed by anyone. The only reason it's a package is to keep it central, and to make it easier to discover where we have rootlesskit-specific codepaths in our codebase. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
132 lines
3.7 KiB
Go
132 lines
3.7 KiB
Go
package command
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import (
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"context"
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"fmt"
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"io"
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"github.com/containerd/log"
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"github.com/docker/docker/daemon/config"
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"github.com/docker/docker/daemon/internal/rootless"
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"github.com/docker/docker/dockerversion"
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"github.com/moby/buildkit/util/apicaps"
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"github.com/spf13/cobra"
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)
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var honorXDG bool
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func newDaemonCommand(stderr io.Writer) (*cobra.Command, error) {
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// FIXME(thaJeztah): config.New also looks up default binary-path, but this code is also executed when running "--version".
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cfg, err := config.New()
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if err != nil {
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return nil, err
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}
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opts := newDaemonOptions(cfg)
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cmd := &cobra.Command{
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Use: "dockerd [OPTIONS]",
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Short: "A self-sufficient runtime for containers.",
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SilenceUsage: true,
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SilenceErrors: true,
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Args: NoArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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opts.flags = cmd.Flags()
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cli, err := newDaemonCLI(opts)
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if err != nil {
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return err
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}
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if opts.Validate {
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// If config wasn't OK we wouldn't have made it this far.
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_, _ = fmt.Fprintln(stderr, "configuration OK")
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return nil
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}
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return runDaemon(cmd.Context(), cli)
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},
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DisableFlagsInUseLine: true,
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Version: fmt.Sprintf("%s, build %s", dockerversion.Version, dockerversion.GitCommit),
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CompletionOptions: cobra.CompletionOptions{
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DisableDefaultCmd: false,
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HiddenDefaultCmd: true,
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DisableDescriptions: false,
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},
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}
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// Cobra's [Command.InitDefaultCompletionCmd] has a special-case for
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// binaries/commands that don't have subcommands, and does not set up
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// the default completion command in that case.
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//
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// Unfortunately, the definition of the default completion commands
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// is not exported, and we don't want to replicate them. As a workaround,
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// we're adding a hidden dummy-command to trick Cobra into applying
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// the default.
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//
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// TODO(thaJeztah): consider contributing to Cobra to either allow explicitly enabling, or to export the default completion commands
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//
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// [Command.InitDefaultCompletionCmd]: https://github.com/spf13/cobra/blob/v1.8.1/completions.go#L685-L698
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cmd.AddCommand(&cobra.Command{
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Use: "__dummy_command",
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Hidden: true,
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})
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SetupRootCommand(cmd)
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flags := cmd.Flags()
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flags.BoolP("version", "v", false, "Print version information and quit")
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flags.StringVar(&opts.configFile, "config-file", opts.configFile, "Daemon configuration file")
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opts.installFlags(flags)
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installConfigFlags(opts.daemonConfig, flags)
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installServiceFlags(flags)
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return cmd, nil
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}
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func init() {
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if dockerversion.ProductName != "" {
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apicaps.ExportedProduct = dockerversion.ProductName
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}
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// When running with RootlessKit, $XDG_RUNTIME_DIR, $XDG_DATA_HOME, and $XDG_CONFIG_HOME needs to be
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// honored as the default dirs, because we are unlikely to have permissions to access the system-wide
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// directories.
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//
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// Note that even running with --rootless, when not running with RootlessKit, honorXDG needs to be kept false,
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// because the system-wide directories in the current mount namespace are expected to be accessible.
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// ("rootful" dockerd in rootless dockerd, #38702)
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honorXDG = rootless.RunningWithRootlessKit()
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}
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// Runner is used to run the daemon command
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type Runner interface {
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Run(context.Context) error
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}
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type daemonRunner struct {
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*cobra.Command
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}
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func (d daemonRunner) Run(ctx context.Context) error {
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configureGRPCLog(ctx)
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return d.ExecuteContext(ctx)
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}
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// NewDaemonRunner creates a new daemon runner with the given
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// stdout and stderr writers.
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func NewDaemonRunner(stdout, stderr io.Writer) (Runner, error) {
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err := log.SetFormat(log.TextFormat)
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if err != nil {
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return nil, err
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}
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initLogging(stdout, stderr)
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cmd, err := newDaemonCommand(stderr)
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if err != nil {
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return nil, err
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}
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cmd.SetOut(stdout)
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return daemonRunner{cmd}, nil
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}
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