DockerCLI/command/swarm/update.go

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package swarm
import (
"fmt"
"golang.org/x/net/context"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
func newUpdateCommand(dockerCli *command.DockerCli) *cobra.Command {
opts := swarmOptions{}
cmd := &cobra.Command{
Use: "update [OPTIONS]",
Short: "Update the swarm",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return runUpdate(dockerCli, cmd.Flags(), opts)
},
PreRunE: func(cmd *cobra.Command, args []string) error {
if cmd.Flags().NFlag() == 0 {
return pflag.ErrHelp
}
return nil
},
}
cmd.Flags().BoolVar(&opts.autolock, flagAutolock, false, "Change manager autolocking setting (true|false)")
addSwarmFlags(cmd.Flags(), &opts)
return cmd
}
func runUpdate(dockerCli *command.DockerCli, flags *pflag.FlagSet, opts swarmOptions) error {
client := dockerCli.Client()
ctx := context.Background()
var updateFlags swarm.UpdateFlags
swarm, err := client.SwarmInspect(ctx)
if err != nil {
return err
}
prevAutoLock := swarm.Spec.EncryptionConfig.AutoLockManagers
opts.mergeSwarmSpec(&swarm.Spec, flags)
curAutoLock := swarm.Spec.EncryptionConfig.AutoLockManagers
err = client.SwarmUpdate(ctx, swarm.Version, swarm.Spec, updateFlags)
if err != nil {
return err
}
fmt.Fprintln(dockerCli.Out(), "Swarm updated.")
if curAutoLock && !prevAutoLock {
unlockKeyResp, err := client.SwarmGetUnlockKey(ctx)
if err != nil {
return errors.Wrap(err, "could not fetch unlock key")
}
printUnlockCommand(ctx, dockerCli, unlockKeyResp.UnlockKey)
}
return nil
}