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package client // import "github.com/docker/docker/client"
import (
"context"
"encoding/json"
"net/http"
"net/url"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/registry"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/api/types/versions"
)
// ServiceUpdate updates a Service. The version number is required to avoid conflicting writes.
// It should be the value as set *before* the update. You can find this value in the Meta field
// of swarm.Service, which can be found using ServiceInspectWithRaw.
func (cli *Client) ServiceUpdate(ctx context.Context, serviceID string, version swarm.Version, service swarm.ServiceSpec, options types.ServiceUpdateOptions) (swarm.ServiceUpdateResponse, error) {
response := swarm.ServiceUpdateResponse{}
// Make sure we negotiated (if the client is configured to do so),
// as code below contains API-version specific handling of options.
//
// Normally, version-negotiation (if enabled) would not happen until
// the API request is made.
if err := cli.checkVersion(ctx); err != nil {
return response, err
}
query := url.Values{}
if options.RegistryAuthFrom != "" {
query.Set("registryAuthFrom", options.RegistryAuthFrom)
}
if options.Rollback != "" {
query.Set("rollback", options.Rollback)
}
query.Set("version", version.String())
if err := validateServiceSpec(service); err != nil {
return response, err
}
// ensure that the image is tagged
var resolveWarning string
switch {
case service.TaskTemplate.ContainerSpec != nil:
if taggedImg := imageWithTagString(service.TaskTemplate.ContainerSpec.Image); taggedImg != "" {
service.TaskTemplate.ContainerSpec.Image = taggedImg
}
if options.QueryRegistry {
resolveWarning = resolveContainerSpecImage(ctx, cli, &service.TaskTemplate, options.EncodedRegistryAuth)
}
case service.TaskTemplate.PluginSpec != nil:
if taggedImg := imageWithTagString(service.TaskTemplate.PluginSpec.Remote); taggedImg != "" {
service.TaskTemplate.PluginSpec.Remote = taggedImg
}
if options.QueryRegistry {
resolveWarning = resolvePluginSpecRemote(ctx, cli, &service.TaskTemplate, options.EncodedRegistryAuth)
}
}
headers := http.Header{}
if versions.LessThan(cli.version, "1.30") {
// the custom "version" header was used by engine API before 20.10
// (API 1.30) to switch between client- and server-side lookup of
// image digests.
headers["version"] = []string{cli.version}
}
if options.EncodedRegistryAuth != "" {
headers[registry.AuthHeader] = []string{options.EncodedRegistryAuth}
}
resp, err := cli.post(ctx, "/services/"+serviceID+"/update", query, service, headers)
defer ensureReaderClosed(resp)
if err != nil {
return response, err
}
err = json.NewDecoder(resp.body).Decode(&response)
if resolveWarning != "" {
response.Warnings = append(response.Warnings, resolveWarning)
}
return response, err
}
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