DockerCLI/command/swarm/unlock_key.go

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package swarm
import (
"fmt"
"github.com/spf13/cobra"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"github.com/pkg/errors"
"golang.org/x/net/context"
)
func newUnlockKeyCommand(dockerCli *command.DockerCli) *cobra.Command {
var rotate, quiet bool
cmd := &cobra.Command{
Use: "unlock-key [OPTIONS]",
Short: "Manage the unlock key",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
client := dockerCli.Client()
ctx := context.Background()
if rotate {
flags := swarm.UpdateFlags{RotateManagerUnlockKey: true}
swarm, err := client.SwarmInspect(ctx)
if err != nil {
return err
}
if !swarm.Spec.EncryptionConfig.AutoLockManagers {
return errors.New("cannot rotate because autolock is not turned on")
}
err = client.SwarmUpdate(ctx, swarm.Version, swarm.Spec, flags)
if err != nil {
return err
}
if !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 quiet {
fmt.Fprintln(dockerCli.Out(), unlockKeyResp.UnlockKey)
} else {
printUnlockCommand(ctx, dockerCli, unlockKeyResp.UnlockKey)
}
return nil
},
}
flags := cmd.Flags()
flags.BoolVar(&rotate, flagRotate, false, "Rotate unlock key")
flags.BoolVarP(&quiet, flagQuiet, "q", false, "Only display token")
return cmd
}
func printUnlockCommand(ctx context.Context, dockerCli *command.DockerCli, unlockKey string) {
if len(unlockKey) == 0 {
return
}
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\nPlease remember to store this key in a password manager, since without it you\nwill not be able to restart the manager.\n", unlockKey)
return
}