Make worker name configurable

Worker name can be set via the flamenco-worker.yaml file now.

CHANGELOG.md

@@ -13,6 +13,7 @@ bugs in actually-released versions.
 - Job settings: add a description for the `eval` field. This is shown in the tooltip of the 'set to automatic value' button, to make it clear what that button will do.
 - Database integrity tests. These are always run at startup of Flamenco Manager, and by default run periodically every hour. This can be configured by adding/changing the `database_check_period: 1h` setting in `flamenco-manager.yaml`. Setting it to `0` will disable the periodic check. When a database consistency error is found, Flamenco Manager will immediately shut down.
 - Workers can be marked as 'restartable' by using the `-restart-exit-code N` commandline option. More info in the [Worker Actions documentation](https://flamenco.blender.org/usage/worker-actions/).
+- Worker name can be configured via `flamenco_worker.yaml` via `worker_name = "somename"`.
 - Upgrade bundled FFmpeg from 5.0 to 5.1.
 - Rename the add-on download to `flamenco-addon.zip` (it used to be `flamenco3-addon.zip`). It still contains the same files as before, and in Blender the name of the add-on has not changed.
 - Improve speed of queueing up >100 simultaneous job deletions.

internal/worker/config.go

@@ -39,6 +39,8 @@ var defaultConfig = WorkerConfig{
 // WorkerConfig represents the configuration of a single worker.
 // It does not include authentication credentials.
 type WorkerConfig struct {
+	WorkerName string `yaml:"worker_name"`
+
 	// ConfiguredManager is the Manager URL that's in the configuration file.
 	ConfiguredManager string `yaml:"manager_url"`
 

internal/worker/registration.go

@@ -92,7 +92,7 @@ func register(ctx context.Context, cfg WorkerConfig, client FlamencoClient) Work
 	secretKey := hex.EncodeToString(secret)
 
 	req := api.RegisterWorkerJSONRequestBody{
-		Name:               workerName(),
+		Name:               workerName(cfg),
 		Platform:           runtime.GOOS,
 		Secret:             secretKey,
 		SupportedTaskTypes: cfg.TaskTypes,
@@ -152,7 +152,7 @@ func signOn(ctx context.Context, cfg WorkerConfig, client FlamencoClient) (api.W
 
 	canRestart := cfg.RestartExitCode != 0
 	req := api.SignOnJSONRequestBody{
-		Name:               workerName(),
+		Name:               workerName(cfg),
 		SupportedTaskTypes: cfg.TaskTypes,
 		SoftwareVersion:    appinfo.ExtendedVersion(),
 		CanRestart:         &canRestart,
@@ -189,7 +189,14 @@ func signOn(ctx context.Context, cfg WorkerConfig, client FlamencoClient) (api.W
 }
 
 // workerName returns a suitable name for  the worker. Errors are fatal.
-func workerName() string {
+func workerName(cfg WorkerConfig) string {
+	name := strings.TrimSpace(cfg.WorkerName)
+	if name != "" {
+		log.Info().
+			Str("name", name).
+			Msg("worker name obtained from worker configuration instead of using the hostname")
+		return name
+	}
 	name, ok := os.LookupEnv(workerNameEnvVariable)
 	if ok && name != "" {
 		name = strings.TrimSpace(name)