package swarm import ( "context" "fmt" "github.com/docker/cli/cli/command" "github.com/docker/cli/cli/command/stack/options" "github.com/docker/cli/cli/compose/convert" "github.com/docker/docker/api/types/swarm" "github.com/docker/docker/api/types/versions" "github.com/pkg/errors" ) // Resolve image constants const ( defaultNetworkDriver = "overlay" ResolveImageAlways = "always" ResolveImageChanged = "changed" ResolveImageNever = "never" ) // RunDeploy is the swarm implementation of docker stack deploy func RunDeploy(dockerCli command.Cli, opts options.Deploy) error { ctx := context.Background() if err := validateStackName(opts.Namespace); err != nil { return err } if err := validateResolveImageFlag(dockerCli, &opts); err != nil { return err } switch { case opts.Bundlefile == "" && len(opts.Composefiles) == 0: return errors.Errorf("Please specify either a bundle file (with --bundle-file) or a Compose file (with --compose-file).") case opts.Bundlefile != "" && len(opts.Composefiles) != 0: return errors.Errorf("You cannot specify both a bundle file and a Compose file.") case opts.Bundlefile != "": return deployBundle(ctx, dockerCli, opts) default: return deployCompose(ctx, dockerCli, opts) } } // validateResolveImageFlag validates the opts.resolveImage command line option // and also turns image resolution off if the version is older than 1.30 func validateResolveImageFlag(dockerCli command.Cli, opts *options.Deploy) error { if opts.ResolveImage != ResolveImageAlways && opts.ResolveImage != ResolveImageChanged && opts.ResolveImage != ResolveImageNever { return errors.Errorf("Invalid option %s for flag --resolve-image", opts.ResolveImage) } // client side image resolution should not be done when the supported // server version is older than 1.30 if versions.LessThan(dockerCli.Client().ClientVersion(), "1.30") { opts.ResolveImage = ResolveImageNever } return nil } // checkDaemonIsSwarmManager does an Info API call to verify that the daemon is // a swarm manager. This is necessary because we must create networks before we // create services, but the API call for creating a network does not return a // proper status code when it can't create a network in the "global" scope. func checkDaemonIsSwarmManager(ctx context.Context, dockerCli command.Cli) error { info, err := dockerCli.Client().Info(ctx) if err != nil { return err } if !info.Swarm.ControlAvailable { return errors.New("this node is not a swarm manager. Use \"docker swarm init\" or \"docker swarm join\" to connect this node to swarm and try again") } return nil } // pruneServices removes services that are no longer referenced in the source func pruneServices(ctx context.Context, dockerCli command.Cli, namespace convert.Namespace, services map[string]struct{}) { client := dockerCli.Client() oldServices, err := getStackServices(ctx, client, namespace.Name()) if err != nil { fmt.Fprintf(dockerCli.Err(), "Failed to list services: %s\n", err) } pruneServices := []swarm.Service{} for _, service := range oldServices { if _, exists := services[namespace.Descope(service.Spec.Name)]; !exists { pruneServices = append(pruneServices, service) } } removeServices(ctx, dockerCli, pruneServices) }