DockerCLI/cli/command/engine/update.go

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package engine
import (
"context"
"fmt"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
clitypes "github.com/docker/cli/types"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
func newUpdateCommand(dockerCli command.Cli) *cobra.Command {
var options extendedEngineInitOptions
cmd := &cobra.Command{
Use: "update [OPTIONS]",
Short: "Update a local engine",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return runUpdate(dockerCli, options)
},
}
flags := cmd.Flags()
flags.StringVar(&options.EngineVersion, "version", "", "Specify engine version")
flags.StringVar(&options.EngineImage, "engine-image", "", "Specify engine image (default uses the same image as currently running)")
flags.StringVar(&options.RegistryPrefix, "registry-prefix", clitypes.RegistryPrefix, "Override the current location where engine images are pulled")
flags.StringVar(&options.sockPath, "containerd", "", "override default location of containerd endpoint")
return cmd
}
func runUpdate(dockerCli command.Cli, options extendedEngineInitOptions) error {
if !isRoot() {
return errors.New("this command must be run as a privileged user")
}
ctx := context.Background()
client, err := dockerCli.NewContainerizedEngineClient(options.sockPath)
if err != nil {
return errors.Wrap(err, "unable to access local containerd")
}
defer client.Close()
authConfig, err := getRegistryAuth(dockerCli, options.RegistryPrefix)
if err != nil {
return err
}
if err := client.DoUpdate(ctx, options.EngineInitOptions, dockerCli.Out(), authConfig); err != nil {
return err
}
fmt.Fprintln(dockerCli.Out(), `Successfully updated engine.
Restart docker with 'systemctl restart docker' to complete the update.`)
return nil
}