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

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package swarm
import (
"context"
"fmt"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/stack/loader"
"github.com/docker/cli/cli/command/stack/options"
"github.com/docker/cli/cli/compose/convert"
composetypes "github.com/docker/cli/cli/compose/types"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
apiclient "github.com/docker/docker/client"
dockerclient "github.com/docker/docker/client"
"github.com/pkg/errors"
)
func deployCompose(ctx context.Context, dockerCli command.Cli, opts options.Deploy) error {
if err := validateStackName(opts.Namespace); err != nil {
return err
}
config, err := loader.LoadComposefile(dockerCli, opts)
if err != nil {
return err
}
if err := checkDaemonIsSwarmManager(ctx, dockerCli); err != nil {
return err
}
namespace := convert.NewNamespace(opts.Namespace)
if opts.Prune {
services := map[string]struct{}{}
for _, service := range config.Services {
services[service.Name] = struct{}{}
}
pruneServices(ctx, dockerCli, namespace, services)
}
serviceNetworks := getServicesDeclaredNetworks(config.Services)
networks, externalNetworks := convert.Networks(namespace, config.Networks, serviceNetworks)
if err := validateExternalNetworks(ctx, dockerCli.Client(), externalNetworks); err != nil {
return err
}
if err := createNetworks(ctx, dockerCli, namespace, networks); err != nil {
return err
}
secrets, err := convert.Secrets(namespace, config.Secrets)
if err != nil {
return err
}
if err := createSecrets(ctx, dockerCli, secrets); err != nil {
return err
}
configs, err := convert.Configs(namespace, config.Configs)
if err != nil {
return err
}
if err := createConfigs(ctx, dockerCli, configs); err != nil {
return err
}
services, err := convert.Services(namespace, config, dockerCli.Client())
if err != nil {
return err
}
return deployServices(ctx, dockerCli, services, namespace, opts.SendRegistryAuth, opts.ResolveImage)
}
func getServicesDeclaredNetworks(serviceConfigs []composetypes.ServiceConfig) map[string]struct{} {
serviceNetworks := map[string]struct{}{}
for _, serviceConfig := range serviceConfigs {
if len(serviceConfig.Networks) == 0 {
serviceNetworks["default"] = struct{}{}
continue
}
for network := range serviceConfig.Networks {
serviceNetworks[network] = struct{}{}
}
}
return serviceNetworks
}
func validateExternalNetworks(
ctx context.Context,
client dockerclient.NetworkAPIClient,
externalNetworks []string,
) error {
for _, networkName := range externalNetworks {
if !container.NetworkMode(networkName).IsUserDefined() {
// Networks that are not user defined always exist on all nodes as
// local-scoped networks, so there's no need to inspect them.
continue
}
network, err := client.NetworkInspect(ctx, networkName, types.NetworkInspectOptions{})
switch {
case dockerclient.IsErrNotFound(err):
return errors.Errorf("network %q is declared as external, but could not be found. You need to create a swarm-scoped network before the stack is deployed", networkName)
case err != nil:
return err
case network.Scope != "swarm":
return errors.Errorf("network %q is declared as external, but it is not in the right scope: %q instead of \"swarm\"", networkName, network.Scope)
}
}
return nil
}
func createSecrets(
ctx context.Context,
dockerCli command.Cli,
secrets []swarm.SecretSpec,
) error {
client := dockerCli.Client()
for _, secretSpec := range secrets {
secret, _, err := client.SecretInspectWithRaw(ctx, secretSpec.Name)
switch {
case err == nil:
// secret already exists, then we update that
if err := client.SecretUpdate(ctx, secret.ID, secret.Meta.Version, secretSpec); err != nil {
return errors.Wrapf(err, "failed to update secret %s", secretSpec.Name)
}
case apiclient.IsErrNotFound(err):
// secret does not exist, then we create a new one.
fmt.Fprintf(dockerCli.Out(), "Creating secret %s\n", secretSpec.Name)
if _, err := client.SecretCreate(ctx, secretSpec); err != nil {
return errors.Wrapf(err, "failed to create secret %s", secretSpec.Name)
}
default:
return err
}
}
return nil
}
func createConfigs(
ctx context.Context,
dockerCli command.Cli,
configs []swarm.ConfigSpec,
) error {
client := dockerCli.Client()
for _, configSpec := range configs {
config, _, err := client.ConfigInspectWithRaw(ctx, configSpec.Name)
switch {
case err == nil:
// config already exists, then we update that
if err := client.ConfigUpdate(ctx, config.ID, config.Meta.Version, configSpec); err != nil {
return errors.Wrapf(err, "failed to update config %s", configSpec.Name)
}
case apiclient.IsErrNotFound(err):
// config does not exist, then we create a new one.
fmt.Fprintf(dockerCli.Out(), "Creating config %s\n", configSpec.Name)
if _, err := client.ConfigCreate(ctx, configSpec); err != nil {
return errors.Wrapf(err, "failed to create config %s", configSpec.Name)
}
default:
return err
}
}
return nil
}
func createNetworks(
ctx context.Context,
dockerCli command.Cli,
namespace convert.Namespace,
networks map[string]types.NetworkCreate,
) error {
client := dockerCli.Client()
existingNetworks, err := getStackNetworks(ctx, client, namespace.Name())
if err != nil {
return err
}
existingNetworkMap := make(map[string]types.NetworkResource)
for _, network := range existingNetworks {
existingNetworkMap[network.Name] = network
}
for name, createOpts := range networks {
if _, exists := existingNetworkMap[name]; exists {
continue
}
if createOpts.Driver == "" {
createOpts.Driver = defaultNetworkDriver
}
fmt.Fprintf(dockerCli.Out(), "Creating network %s\n", name)
if _, err := client.NetworkCreate(ctx, name, createOpts); err != nil {
return errors.Wrapf(err, "failed to create network %s", name)
}
}
return nil
}
func deployServices(
ctx context.Context,
dockerCli command.Cli,
services map[string]swarm.ServiceSpec,
namespace convert.Namespace,
sendAuth bool,
resolveImage string,
) error {
apiClient := dockerCli.Client()
out := dockerCli.Out()
existingServices, err := getStackServices(ctx, apiClient, namespace.Name())
if err != nil {
return err
}
existingServiceMap := make(map[string]swarm.Service)
for _, service := range existingServices {
existingServiceMap[service.Spec.Name] = service
}
for internalName, serviceSpec := range services {
name := namespace.Scope(internalName)
encodedAuth := ""
image := serviceSpec.TaskTemplate.ContainerSpec.Image
if sendAuth {
// Retrieve encoded auth token from the image reference
encodedAuth, err = command.RetrieveAuthTokenFromImage(ctx, dockerCli, image)
if err != nil {
return err
}
}
if service, exists := existingServiceMap[name]; exists {
fmt.Fprintf(out, "Updating service %s (id: %s)\n", name, service.ID)
updateOpts := types.ServiceUpdateOptions{EncodedRegistryAuth: encodedAuth}
switch {
case resolveImage == ResolveImageAlways || (resolveImage == ResolveImageChanged && image != service.Spec.Labels[convert.LabelImage]):
// image should be updated by the server using QueryRegistry
updateOpts.QueryRegistry = true
case image == service.Spec.Labels[convert.LabelImage]:
// image has not changed; update the serviceSpec with the
// existing information that was set by QueryRegistry on the
// previous deploy. Otherwise this will trigger an incorrect
// service update.
serviceSpec.TaskTemplate.ContainerSpec.Image = service.Spec.TaskTemplate.ContainerSpec.Image
}
// Stack deploy does not have a `--force` option. Preserve existing ForceUpdate
// value so that tasks are not re-deployed if not updated.
// TODO move this to API client?
serviceSpec.TaskTemplate.ForceUpdate = service.Spec.TaskTemplate.ForceUpdate
response, err := apiClient.ServiceUpdate(
ctx,
service.ID,
service.Version,
serviceSpec,
updateOpts,
)
if err != nil {
return errors.Wrapf(err, "failed to update service %s", name)
}
for _, warning := range response.Warnings {
fmt.Fprintln(dockerCli.Err(), warning)
}
} else {
fmt.Fprintf(out, "Creating service %s\n", name)
createOpts := types.ServiceCreateOptions{EncodedRegistryAuth: encodedAuth}
// query registry if flag disabling it was not set
if resolveImage == ResolveImageAlways || resolveImage == ResolveImageChanged {
createOpts.QueryRegistry = true
}
if _, err := apiClient.ServiceCreate(ctx, serviceSpec, createOpts); err != nil {
return errors.Wrapf(err, "failed to create service %s", name)
}
}
}
return nil
}