DockerCLI/cli/command/stack/swarm/deploy.go

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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)
}