DockerCLI/cli/command/stack/deploy.go

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package stack
import (
"fmt"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"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"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
const (
defaultNetworkDriver = "overlay"
resolveImageAlways = "always"
resolveImageChanged = "changed"
resolveImageNever = "never"
)
type deployOptions struct {
bundlefile string
composefile string
namespace string
resolveImage string
sendRegistryAuth bool
prune bool
}
func newDeployCommand(dockerCli command.Cli) *cobra.Command {
var opts deployOptions
cmd := &cobra.Command{
Use: "deploy [OPTIONS] STACK",
Aliases: []string{"up"},
Short: "Deploy a new stack or update an existing stack",
Args: cli.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
opts.namespace = args[0]
return runDeploy(dockerCli, opts)
},
}
flags := cmd.Flags()
addBundlefileFlag(&opts.bundlefile, flags)
addComposefileFlag(&opts.composefile, flags)
addRegistryAuthFlag(&opts.sendRegistryAuth, flags)
flags.BoolVar(&opts.prune, "prune", false, "Prune services that are no longer referenced")
flags.SetAnnotation("prune", "version", []string{"1.27"})
flags.StringVar(&opts.resolveImage, "resolve-image", resolveImageAlways,
`Query the registry to resolve image digest and supported platforms ("`+resolveImageAlways+`"|"`+resolveImageChanged+`"|"`+resolveImageNever+`")`)
flags.SetAnnotation("resolve-image", "version", []string{"1.30"})
return cmd
}
func runDeploy(dockerCli command.Cli, opts deployOptions) error {
ctx := context.Background()
if err := validateResolveImageFlag(dockerCli, &opts); err != nil {
return err
}
switch {
case opts.bundlefile == "" && opts.composefile == "":
return errors.Errorf("Please specify either a bundle file (with --bundle-file) or a Compose file (with --compose-file).")
case opts.bundlefile != "" && opts.composefile != "":
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 *deployOptions) 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{}) bool {
client := dockerCli.Client()
oldServices, err := getServices(ctx, client, namespace.Name())
if err != nil {
fmt.Fprintf(dockerCli.Err(), "Failed to list services: %s", err)
return true
}
pruneServices := []swarm.Service{}
for _, service := range oldServices {
if _, exists := services[namespace.Descope(service.Spec.Name)]; !exists {
pruneServices = append(pruneServices, service)
}
}
return removeServices(ctx, dockerCli, pruneServices)
}