DockerCLI/cli/command/swarm/unlock_key.go

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package swarm
import (
"fmt"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/docker/api/types/swarm"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
type unlockKeyOptions struct {
rotate bool
quiet bool
}
func newUnlockKeyCommand(dockerCli command.Cli) *cobra.Command {
opts := unlockKeyOptions{}
cmd := &cobra.Command{
Use: "unlock-key [OPTIONS]",
Short: "Manage the unlock key",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return runUnlockKey(dockerCli, opts)
},
}
flags := cmd.Flags()
flags.BoolVar(&opts.rotate, flagRotate, false, "Rotate unlock key")
flags.BoolVarP(&opts.quiet, flagQuiet, "q", false, "Only display token")
return cmd
}
func runUnlockKey(dockerCli command.Cli, opts unlockKeyOptions) error {
client := dockerCli.Client()
ctx := context.Background()
if opts.rotate {
flags := swarm.UpdateFlags{RotateManagerUnlockKey: true}
sw, err := client.SwarmInspect(ctx)
if err != nil {
return err
}
if !sw.Spec.EncryptionConfig.AutoLockManagers {
return errors.New("cannot rotate because autolock is not turned on")
}
if err := client.SwarmUpdate(ctx, sw.Version, sw.Spec, flags); err != nil {
return err
}
if !opts.quiet {
fmt.Fprintf(dockerCli.Out(), "Successfully rotated manager unlock key.\n\n")
}
}
unlockKeyResp, err := client.SwarmGetUnlockKey(ctx)
if err != nil {
return errors.Wrap(err, "could not fetch unlock key")
}
if unlockKeyResp.UnlockKey == "" {
return errors.New("no unlock key is set")
}
if opts.quiet {
fmt.Fprintln(dockerCli.Out(), unlockKeyResp.UnlockKey)
return nil
}
printUnlockCommand(ctx, dockerCli, unlockKeyResp.UnlockKey)
return nil
}
func printUnlockCommand(ctx context.Context, dockerCli command.Cli, unlockKey string) {
if len(unlockKey) > 0 {
fmt.Fprintf(dockerCli.Out(), "To unlock a swarm manager after it restarts, "+
"run the `docker swarm unlock`\ncommand and provide the following key:\n\n %s\n\n"+
"Please remember to store this key in a password manager, since without it you\n"+
"will not be able to restart the manager.\n", unlockKey)
}
return
}