Much more of the Worker life cycle implemented

cmd/flamenco-manager-poc/main.go

@@ -89,6 +89,7 @@ func buildWebService(flamenco api.ServerInterface) *echo.Echo {
 
 	// Ensure panics when serving a web request won't bring down the server.
 	e.Use(middleware.Recover())
+	e.Use(api_impl.MiddleWareRequestLogger)
 
 	// Load the API definition and enable validation & authentication checks.
 	swagger, err := api.GetSwagger()

cmd/flamenco-worker-poc/config.go

@@ -0,0 +1,81 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/rs/zerolog/log"
+	"gitlab.com/blender/flamenco-ng-poc/internal/worker"
+)
+
+/* ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * Original Code Copyright (C) 2022 Blender Foundation.
+ *
+ * This file is part of Flamenco.
+ *
+ * Flamenco is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * Flamenco is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * Flamenco.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * ***** END GPL LICENSE BLOCK ***** */
+
+const (
+	credentialsFilename = "flamenco-worker-credentials.yaml"
+	configFilename      = "flamenco-worker.yaml"
+)
+
+func loadConfig(configWrangler worker.FileConfigWrangler) (worker.WorkerConfig, error) {
+	logger := log.With().Str("filename", configFilename).Logger()
+
+	var cfg worker.WorkerConfig
+
+	err := configWrangler.LoadConfig(configFilename, &cfg)
+
+	// If the configuration file doesn't exist, write the defaults & retry loading them.
+	if os.IsNotExist(err) {
+		logger.Info().Msg("writing default configuration file")
+		cfg = configWrangler.DefaultConfig()
+		err = configWrangler.WriteConfig(configFilename, "Configuration", cfg)
+		if err != nil {
+			return cfg, fmt.Errorf("error writing default config: %w", err)
+		}
+		err = configWrangler.LoadConfig(configFilename, &cfg)
+	}
+	if err != nil {
+		return cfg, fmt.Errorf("error loading config from %s: %w", configFilename, err)
+	}
+
+	// Validate the manager URL.
+	if cfg.Manager != "" {
+		_, err := worker.ParseURL(cfg.Manager)
+		if err != nil {
+			return cfg, fmt.Errorf("error parsing manager URL %s: %w", cfg.Manager, err)
+		}
+		logger.Debug().Str("url", cfg.Manager).Msg("parsed manager URL")
+	}
+
+	return cfg, nil
+}
+
+func loadCredentials(configWrangler worker.FileConfigWrangler) (worker.WorkerCredentials, error) {
+	logger := log.With().Str("filename", configFilename).Logger()
+	logger.Info().Msg("loading credentials")
+
+	var creds worker.WorkerCredentials
+
+	err := configWrangler.LoadConfig(credentialsFilename, &creds)
+	if err != nil {
+		return worker.WorkerCredentials{}, err
+	}
+
+	return creds, nil
+}

cmd/flamenco-worker-poc/main.go

@@ -23,8 +23,10 @@ package main
 import (
 	"context"
 	"fmt"
-	"net/http"
+	"os"
-	"net/url"
+	"os/signal"
+	"runtime"
+	"syscall"
 	"time"
 
 	"github.com/mattn/go-colorable"
@@ -33,8 +35,11 @@ import (
 
 	"gitlab.com/blender/flamenco-ng-poc/internal/appinfo"
 	"gitlab.com/blender/flamenco-ng-poc/internal/worker"
-	"gitlab.com/blender/flamenco-ng-poc/internal/worker/ssdp"
+)
-	"gitlab.com/blender/flamenco-ng-poc/pkg/api"
+
+var (
+	w                *worker.Worker
+	shutdownComplete chan struct{}
 )
 
 func main() {
@@ -47,70 +52,65 @@ func main() {
 	output := zerolog.ConsoleWriter{Out: colorable.NewColorableStdout(), TimeFormat: time.RFC3339}
 	log.Logger = log.Output(output)
 
-	log.Info().Str("version", appinfo.ApplicationVersion).Msgf("starting %v Worker", appinfo.ApplicationName)
-
-	// configWrangler := worker.NewConfigWrangler()
-	managerFinder := ssdp.NewManagerFinder(cliArgs.managerURL)
-	// taskRunner := struct{}{}
-	findManager(managerFinder)
-
-	// basicAuthProvider, err := securityprovider.NewSecurityProviderBasicAuth("MY_USER", "MY_PASS")
-	// if err != nil {
-	// 	log.Panic().Err(err).Msg("unable to create basic authr")
-	// }
-
-	// flamenco, err := api.NewClientWithResponses(
-	// 	"http://localhost:8080/",
-	// 	api.WithRequestEditorFn(basicAuthProvider.Intercept),
-	// 	api.WithRequestEditorFn(func(ctx context.Context, req *http.Request) error {
-	// 		req.Header.Set("User-Agent", appinfo.UserAgent())
-	// 		return nil
-	// 	}),
-	// )
-	// if err != nil {
-	// 	log.Fatal().Err(err).Msg("error creating client")
-	// }
-
-	// w := worker.NewWorker(flamenco, configWrangler, managerFinder, taskRunner)
-	// ctx := context.Background()
-	// registerWorker(ctx, flamenco)
-	// obtainTask(ctx, flamenco)
-}
-
-func obtainTask(ctx context.Context, flamenco *api.ClientWithResponses) {
-	resp, err := flamenco.ScheduleTaskWithResponse(ctx)
-	if err != nil {
-		log.Fatal().Err(err).Msg("error obtaining task")
-	}
-	switch {
-	case resp.JSON200 != nil:
 	log.Info().
-			Interface("task", resp.JSON200).
+		Str("version", appinfo.ApplicationVersion).
-			Msg("obtained task")
+		Str("OS", runtime.GOOS).
-	case resp.JSON403 != nil:
+		Str("ARCH", runtime.GOARCH).
-		log.Fatal().
+		Int("pid", os.Getpid()).
-			Int("code", resp.StatusCode()).
+		Msgf("starting %v Worker", appinfo.ApplicationName)
-			Str("error", string(resp.JSON403.Message)).
+
-			Msg("access denied")
+	configWrangler := worker.NewConfigWrangler()
-	case resp.StatusCode() == http.StatusNoContent:
+
-		log.Info().Msg("no task available")
+	startupCtx, sctxCancelFunc := context.WithTimeout(context.Background(), 10*time.Second)
-	default:
+	client, startupState := registerOrSignOn(startupCtx, configWrangler)
-		log.Fatal().
+	sctxCancelFunc()
-			Int("code", resp.StatusCode()).
+
-			Str("error", string(resp.Body)).
+	shutdownComplete = make(chan struct{})
-			Msg("unable to obtain task")
+
+	taskRunner := struct{}{}
+	w = worker.NewWorker(client, taskRunner)
+
+	// Handle Ctrl+C
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt)
+	signal.Notify(c, syscall.SIGTERM)
+	go func() {
+		for signum := range c {
+			// Run the shutdown sequence in a goroutine, so that multiple Ctrl+C presses can be handled in parallel.
+			go shutdown(signum)
 		}
+	}()
+
+	workerCtx := context.Background()
+	w.Start(workerCtx, startupState)
+
+	<-shutdownComplete
+
+	log.Debug().Msg("process shutting down")
 }
 
-func findManager(managerFinder worker.ManagerFinder) *url.URL {
+func shutdown(signum os.Signal) {
-	finder := managerFinder.FindFlamencoManager()
+	done := make(chan struct{})
+	go func() {
+		log.Info().Str("signal", signum.String()).Msg("signal received, shutting down.")
+
+		if w != nil {
+			shutdownCtx, cancelFunc := context.WithTimeout(context.Background(), 3*time.Second)
+			defer cancelFunc()
+			w.SignOff(shutdownCtx)
+			w.Close()
+		}
+		close(done)
+	}()
+
 	select {
-	case manager := <-finder:
+	case <-done:
-		log.Info().Str("manager", manager.String()).Msg("found Manager")
+		log.Debug().Msg("shutdown OK")
-		return manager
+	case <-time.After(20 * time.Second):
-	case <-time.After(10 * time.Second):
+		log.Error().Msg("shutdown forced, stopping process.")
-		log.Fatal().Msg("unable to autodetect Flamenco Manager via UPnP/SSDP; configure the URL explicitly")
+		os.Exit(-2)
 	}
 
-	return nil
+	log.Warn().Msg("shutdown complete, stopping process.")
+	close(shutdownComplete)
 }

cmd/flamenco-worker-poc/registration.go

@@ -0,0 +1,188 @@
+package main
+
+/* ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * Original Code Copyright (C) 2022 Blender Foundation.
+ *
+ * This file is part of Flamenco.
+ *
+ * Flamenco is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * Flamenco is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * Flamenco.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * ***** END GPL LICENSE BLOCK ***** */
+
+import (
+	"context"
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+	"net/http"
+	"os"
+	"runtime"
+
+	"github.com/deepmap/oapi-codegen/pkg/securityprovider"
+	"github.com/rs/zerolog/log"
+	"gitlab.com/blender/flamenco-ng-poc/internal/appinfo"
+	"gitlab.com/blender/flamenco-ng-poc/internal/worker"
+	"gitlab.com/blender/flamenco-ng-poc/pkg/api"
+)
+
+var errSignOnFailure = errors.New("unable to sign on at Manager")
+
+func registerOrSignOn(ctx context.Context, configWrangler worker.FileConfigWrangler) (
+	client api.ClientWithResponsesInterface, startupState api.WorkerStatus,
+) {
+	// Load configuration
+	cfg, err := loadConfig(configWrangler)
+	if err != nil {
+		log.Fatal().Err(err).Msg("loading configuration")
+	}
+
+	if cfg.Manager == "" {
+		log.Fatal().Msg("no manager configured")
+	}
+
+	// Load credentials
+	creds, err := loadCredentials(configWrangler)
+	if err == nil {
+		// Credentials can be loaded just fine, try to sign on with them.
+		client = authenticatedClient(cfg, creds)
+		startupState, err = signOn(ctx, cfg, client)
+		if err == nil {
+			// Sign on is fine!
+			return
+		}
+	}
+
+	// Either there were no credentials, or existing ones weren't accepted, just register as new worker.
+	client = authenticatedClient(cfg, worker.WorkerCredentials{})
+	creds = register(ctx, cfg, client)
+
+	// store ID and secretKey in config file when registration is complete.
+	err = configWrangler.WriteConfig(credentialsFilename, "Credentials", creds)
+	if err != nil {
+		log.Fatal().Err(err).Str("file", credentialsFilename).
+			Msg("unable to write credentials configuration file")
+	}
+
+	// Sign-on should work now.
+	client = authenticatedClient(cfg, creds)
+	startupState, err = signOn(ctx, cfg, client)
+	if err != nil {
+		log.Fatal().Err(err).Str("manager", cfg.Manager).Msg("unable to sign on after registering")
+	}
+
+	return
+}
+
+// (Re-)register ourselves at the Manager.
+// Logs a fatal error if unsuccesful.
+func register(ctx context.Context, cfg worker.WorkerConfig, client api.ClientWithResponsesInterface) worker.WorkerCredentials {
+	// Construct our new password.
+	secret := make([]byte, 32)
+	if _, err := rand.Read(secret); err != nil {
+		log.Fatal().Err(err).Msg("unable to generate secret key")
+	}
+	secretKey := hex.EncodeToString(secret)
+
+	req := api.RegisterWorkerJSONRequestBody{
+		Nickname:           mustHostname(),
+		Platform:           runtime.GOOS,
+		Secret:             secretKey,
+		SupportedTaskTypes: cfg.TaskTypes,
+	}
+	resp, err := client.RegisterWorkerWithResponse(ctx, req)
+	if err != nil {
+		log.Fatal().Err(err).Msg("error registering at Manager")
+	}
+	switch {
+	case resp.JSON200 != nil:
+		log.Info().
+			Int("code", resp.StatusCode()).
+			Interface("resp", resp.JSON200).
+			Msg("registered at Manager")
+	default:
+		log.Fatal().
+			Int("code", resp.StatusCode()).
+			Interface("resp", resp.JSONDefault).
+			Msg("unable to register at Manager")
+	}
+
+	return worker.WorkerCredentials{
+		WorkerID: resp.JSON200.Uuid,
+		Secret:   secretKey,
+	}
+}
+
+// signOn tells the Manager we're alive and returns the status the Manager tells us to go to.
+func signOn(ctx context.Context, cfg worker.WorkerConfig, client api.ClientWithResponsesInterface) (api.WorkerStatus, error) {
+	logger := log.With().Str("manager", cfg.Manager).Logger()
+	logger.Info().Msg("signing on at Manager")
+
+	req := api.SignOnJSONRequestBody{
+		Nickname:           mustHostname(),
+		SupportedTaskTypes: cfg.TaskTypes,
+	}
+	resp, err := client.SignOnWithResponse(ctx, req)
+	if err != nil {
+		logger.Warn().Err(err).Msg("unable to send sign-on request")
+		return "", errSignOnFailure
+	}
+	switch {
+	case resp.JSON200 != nil:
+		log.Info().
+			Int("code", resp.StatusCode()).
+			Interface("resp", resp.JSON200).
+			Msg("signed on at Manager")
+	default:
+		log.Warn().
+			Int("code", resp.StatusCode()).
+			Interface("resp", resp.JSONDefault).
+			Msg("unable to sign on at Manager")
+		return "", errSignOnFailure
+	}
+
+	startupState := resp.JSON200.StatusRequested
+	log.Info().Str("startup_state", string(startupState)).Msg("manager accepted sign-on")
+	return startupState, nil
+}
+
+// mustHostname either the hostname or logs a fatal error.
+func mustHostname() string {
+	hostname, err := os.Hostname()
+	if err != nil {
+		log.Fatal().Err(err).Msg("error getting hostname")
+	}
+	return hostname
+}
+
+// authenticatedClient constructs a Flamenco client with the given credentials.
+func authenticatedClient(cfg worker.WorkerConfig, creds worker.WorkerCredentials) api.ClientWithResponsesInterface {
+	basicAuthProvider, err := securityprovider.NewSecurityProviderBasicAuth(creds.WorkerID, creds.Secret)
+	if err != nil {
+		log.Panic().Err(err).Msg("unable to create basic auth provider")
+	}
+
+	flamenco, err := api.NewClientWithResponses(
+		cfg.Manager,
+		api.WithRequestEditorFn(basicAuthProvider.Intercept),
+		api.WithRequestEditorFn(func(ctx context.Context, req *http.Request) error {
+			req.Header.Set("User-Agent", appinfo.UserAgent())
+			return nil
+		}),
+	)
+	if err != nil {
+		log.Fatal().Err(err).Msg("error creating client")
+	}
+
+	return flamenco
+}

flamenco-worker-credentials.yaml

@@ -0,0 +1,9 @@
+# Credentials file for Flamenco Worker.
+# For an explanation of the fields, refer to flamenco-worker-example.yaml
+#
+# NOTE: this file can be overwritten by Flamenco Worker.
+#
+# This file was written on 2022-01-31 14:49:14 +01:00
+
+worker_id: 9b41b767-74de-4cac-9604-f3521821d68d
+worker_secret: 9b4d6b672181d29dfc65ceb59ff7aba3aab3e5bd9cac5d50342eb3a7217b0085

flamenco-worker.yaml

@@ -0,0 +1,14 @@
+# Configuration file for Flamenco Worker.
+# For an explanation of the fields, refer to flamenco-worker-example.yaml
+#
+# NOTE: this file can be overwritten by Flamenco Worker.
+#
+# This file was written on 2022-01-31 14:45:36 +01:00
+
+manager_url: "http://localhost:8080/"
+task_types:
+- sleep
+- blender-render
+- file-management
+- exr-merge
+- debug

go.mod

@@ -19,7 +19,6 @@ require (
 	github.com/shopspring/decimal v1.2.0 // indirect
 	github.com/stretchr/testify v1.7.0
 	github.com/ziflex/lecho/v3 v3.1.0
-	gitlab.com/blender-institute/gossdp v0.0.0-20181214124559-074ccf115d76
 	golang.org/x/net v0.0.0-20211013171255-e13a2654a71e
 	gopkg.in/yaml.v2 v2.4.0
 	gorm.io/driver/postgres v1.0.8

go.sum

@@ -227,8 +227,6 @@ github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1
 github.com/zenazn/goji v0.9.0/go.mod h1:7S9M489iMyHBNxwZnk9/EHS098H4/F6TATF2mIxtB1Q=
 github.com/ziflex/lecho/v3 v3.1.0 h1:65bSzSc0yw7EEhi44lMnkOI877ZzbE7tGDWfYCQXZwI=
 github.com/ziflex/lecho/v3 v3.1.0/go.mod h1:dwQ6xCAKmSBHhwZ6XmiAiDptD7iklVkW7xQYGUncX0Q=
-gitlab.com/blender-institute/gossdp v0.0.0-20181214124559-074ccf115d76 h1:ASbeHgntCaY+Q/qRUX1y6T12WncACelKVRUFGjyIOVM=
-gitlab.com/blender-institute/gossdp v0.0.0-20181214124559-074ccf115d76/go.mod h1:+j3oHEe07Rw8lFbVhESVy83XVW51AndFrjbUMb2JI4k=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=

internal/manager/api_impl/logging.go

@@ -0,0 +1,41 @@
+package api_impl
+
+import (
+	"context"
+
+	"github.com/labstack/echo/v4"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+type loggerContextKey string
+
+const (
+	loggerKey = loggerContextKey("logger")
+)
+
+// MiddleWareRequestLogger is Echo middleware that puts a Zerolog logger in the request context, for endpoints to use.
+func MiddleWareRequestLogger(next echo.HandlerFunc) echo.HandlerFunc {
+	return func(c echo.Context) error {
+		remoteIP := c.RealIP()
+		logger := log.With().Str("remoteAddr", remoteIP).Logger()
+		ctx := context.WithValue(c.Request().Context(), loggerKey, logger)
+		c.SetRequest(c.Request().WithContext(ctx))
+
+		if err := next(c); err != nil {
+			c.Error(err)
+		}
+		return nil
+	}
+}
+
+func requestLogger(e echo.Context) zerolog.Logger {
+	ctx := e.Request().Context()
+	logger, ok := ctx.Value(loggerKey).(zerolog.Logger)
+	if ok {
+		return logger
+	}
+
+	log.Error().Msg("no logger found in request context, returning default logger")
+	return log.With().Logger()
+}

internal/manager/api_impl/workers.go

@@ -26,7 +26,6 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/labstack/echo/v4"
-	"github.com/rs/zerolog/log"
 
 	"gitlab.com/blender/flamenco-ng-poc/internal/manager/persistence"
 	"gitlab.com/blender/flamenco-ng-poc/pkg/api"
@@ -34,8 +33,7 @@ import (
 
 // RegisterWorker registers a new worker and stores it in the database.
 func (f *Flamenco) RegisterWorker(e echo.Context) error {
-	remoteIP := e.RealIP()
+	logger := requestLogger(e)
-	logger := log.With().Str("ip", remoteIP).Logger()
 
 	var req api.RegisterWorkerJSONBody
 	err := e.Bind(&req)
@@ -53,7 +51,7 @@ func (f *Flamenco) RegisterWorker(e echo.Context) error {
 		Name:               req.Nickname,
 		Secret:             req.Secret,
 		Platform:           req.Platform,
-		Address:            remoteIP,
+		Address:            e.RealIP(),
 		SupportedTaskTypes: strings.Join(req.SupportedTaskTypes, ","),
 	}
 	if err := f.persist.CreateWorker(e.Request().Context(), &dbWorker); err != nil {
@@ -74,8 +72,7 @@ func (f *Flamenco) RegisterWorker(e echo.Context) error {
 }
 
 func (f *Flamenco) SignOn(e echo.Context) error {
-	remoteIP := e.RealIP()
+	logger := requestLogger(e)
-	logger := log.With().Str("ip", remoteIP).Logger()
 
 	var req api.SignOnJSONBody
 	err := e.Bind(&req)
@@ -92,6 +89,44 @@ func (f *Flamenco) SignOn(e echo.Context) error {
 	})
 }
 
+func (f *Flamenco) SignOff(e echo.Context) error {
+	logger := requestLogger(e)
+
+	var req api.SignOnJSONBody
+	err := e.Bind(&req)
+	if err != nil {
+		logger.Warn().Err(err).Msg("bad request received")
+		return sendAPIError(e, http.StatusBadRequest, "invalid format")
+	}
+
+	logger.Info().Str("nickname", req.Nickname).Msg("worker signing off")
+
+	// TODO: store status in DB.
+	return e.String(http.StatusNoContent, "")
+}
+
+// (GET /api/worker/state)
+func (f *Flamenco) WorkerState(e echo.Context) error {
+	// TODO: look up proper status in DB.
+	return e.String(http.StatusNoContent, "")
+}
+
+// Worker changed state. This could be as acknowledgement of a Manager-requested state change, or in response to worker-local signals.
+// (POST /api/worker/state-changed)
+func (f *Flamenco) WorkerStateChanged(e echo.Context) error {
+	logger := requestLogger(e)
+
+	var req api.WorkerStateChangedJSONRequestBody
+	err := e.Bind(&req)
+	if err != nil {
+		logger.Warn().Err(err).Msg("bad request received")
+		return sendAPIError(e, http.StatusBadRequest, "invalid format")
+	}
+
+	logger.Info().Str("newStatus", string(req.Status)).Msg("worker changed status")
+	return e.String(http.StatusNoContent, "")
+}
+
 func (f *Flamenco) ScheduleTask(e echo.Context) error {
 	return e.JSON(http.StatusOK, &api.AssignedTask{
 		Uuid: uuid.New().String(),

internal/worker/config.go

@@ -43,23 +43,16 @@ type WorkerConfig struct {
 	TaskTypes []string `yaml:"task_types"`
 }
 
-type workerCredentials struct {
+type WorkerCredentials struct {
 	WorkerID string `yaml:"worker_id"`
 	Secret   string `yaml:"worker_secret"`
 }
 
-// ConfigWrangler makes it simple to load and write configuration files.
-type ConfigWrangler interface {
-	DefaultConfig() WorkerConfig
-	WriteConfig(filename string, filetype string, config interface{}) error
-	LoadConfig(filename string, config interface{}) error
-}
-
 // FileConfigWrangler is the default config wrangler that actually reads & writes files.
 type FileConfigWrangler struct{}
 
-// NewConfigWrangler returns a new ConfigWrangler instance of the default type FileConfigWrangler.
+// NewConfigWrangler returns ConfigWrangler that reads files.
-func NewConfigWrangler() ConfigWrangler {
+func NewConfigWrangler() FileConfigWrangler {
 	return FileConfigWrangler{}
 }
 

internal/worker/registration.go

@@ -1,131 +0,0 @@
-package worker
-
-/* ***** BEGIN GPL LICENSE BLOCK *****
- *
- * Original Code Copyright (C) 2022 Blender Foundation.
- *
- * This file is part of Flamenco.
- *
- * Flamenco is free software: you can redistribute it and/or modify it under
- * the terms of the GNU General Public License as published by the Free Software
- * Foundation, either version 3 of the License, or (at your option) any later
- * version.
- *
- * Flamenco is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * Flamenco.  If not, see <https://www.gnu.org/licenses/>.
- *
- * ***** END GPL LICENSE BLOCK ***** */
-
-import (
-	"context"
-	"crypto/rand"
-	"encoding/hex"
-	"os"
-	"runtime"
-
-	"github.com/rs/zerolog/log"
-	"gitlab.com/blender/flamenco-ng-poc/pkg/api"
-)
-
-// (Re-)register ourselves at the Manager.
-func (w *Worker) register(ctx context.Context) {
-	// Construct our new password.
-	secret := make([]byte, 32)
-	if _, err := rand.Read(secret); err != nil {
-		log.Fatal().Err(err).Msg("unable to generate secret key")
-	}
-	secretKey := hex.EncodeToString(secret)
-
-	// TODO: load taskTypes from config file.
-	taskTypes := []string{"unknown", "sleep", "blender-render", "debug", "ffmpeg"}
-
-	req := api.RegisterWorkerJSONRequestBody{
-		Nickname:           mustHostname(),
-		Platform:           runtime.GOOS,
-		Secret:             secretKey,
-		SupportedTaskTypes: taskTypes,
-	}
-	resp, err := w.client.RegisterWorkerWithResponse(ctx, req)
-	if err != nil {
-		log.Fatal().Err(err).Msg("error registering at Manager")
-	}
-	switch {
-	case resp.JSON200 != nil:
-		log.Info().
-			Int("code", resp.StatusCode()).
-			Interface("resp", resp.JSON200).
-			Msg("registered at Manager")
-	default:
-		log.Fatal().
-			Int("code", resp.StatusCode()).
-			Interface("resp", resp.JSONDefault).
-			Msg("unable to register at Manager")
-	}
-
-	// store ID and secretKey in config file when registration is complete.
-	err = w.configWrangler.WriteConfig(credentialsFilename, "Credentials", workerCredentials{
-		WorkerID: resp.JSON200.Uuid,
-		Secret:   secretKey,
-	})
-	if err != nil {
-		log.Fatal().Err(err).Str("file", credentialsFilename).
-			Msg("unable to write credentials configuration file")
-	}
-}
-
-func (w *Worker) reregister(ctx context.Context) {
-	w.register(ctx)
-	w.loadConfig()
-}
-
-// signOn tells the Manager we're alive and returns the status the Manager tells us to go to.
-// Failure to sign on is fatal.
-func (w *Worker) signOn(ctx context.Context) api.WorkerStatus {
-	logger := log.With().Str("manager", w.manager.String()).Logger()
-	logger.Info().Msg("signing on at Manager")
-
-	if w.creds == nil {
-		logger.Fatal().Msg("no credentials, unable to sign on")
-	}
-
-	// TODO: load taskTypes from config file.
-	taskTypes := []string{"unknown", "sleep", "blender-render", "debug", "ffmpeg"}
-
-	req := api.SignOnJSONRequestBody{
-		Nickname:           mustHostname(),
-		SupportedTaskTypes: taskTypes,
-	}
-	resp, err := w.client.SignOnWithResponse(ctx, req)
-	if err != nil {
-		log.Fatal().Err(err).Msg("error registering at Manager")
-	}
-	switch {
-	case resp.JSON200 != nil:
-		log.Info().
-			Int("code", resp.StatusCode()).
-			Interface("resp", resp.JSON200).
-			Msg("signed on at Manager")
-	default:
-		log.Fatal().
-			Int("code", resp.StatusCode()).
-			Interface("resp", resp.JSONDefault).
-			Msg("unable to sign on at Manager")
-	}
-
-	startupState := resp.JSON200.StatusRequested
-	log.Info().Str("startup_state", string(startupState)).Msg("manager accepted sign-on")
-	return startupState
-}
-
-// mustHostname either the hostname or logs a fatal error.
-func mustHostname() string {
-	hostname, err := os.Hostname()
-	if err != nil {
-		log.Fatal().Err(err).Msg("error getting hostname")
-	}
-	return hostname
-}

internal/worker/ssdp/client.go

@@ -1,104 +0,0 @@
-package ssdp
-
-/* ***** BEGIN GPL LICENSE BLOCK *****
- *
- * Original Code Copyright (C) 2022 Blender Foundation.
- *
- * This file is part of Flamenco.
- *
- * Flamenco is free software: you can redistribute it and/or modify it under
- * the terms of the GNU General Public License as published by the Free Software
- * Foundation, either version 3 of the License, or (at your option) any later
- * version.
- *
- * Flamenco is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * Flamenco.  If not, see <https://www.gnu.org/licenses/>.
- *
- * ***** END GPL LICENSE BLOCK ***** */
-
-import (
-	"net/url"
-
-	"github.com/rs/zerolog/log"
-	"gitlab.com/blender-institute/gossdp"
-)
-
-// Finder is a uses UPnP/SSDP to find a Flamenco Manager on the local network.
-type Finder struct {
-	overrideURL *url.URL
-}
-
-type ssdpClient struct {
-	response chan interface{}
-}
-
-// NewManagerFinder returns a default SSDP/UPnP based finder.
-func NewManagerFinder(managerURL *url.URL) Finder {
-	return Finder{
-		overrideURL: managerURL,
-	}
-}
-
-func (b *ssdpClient) NotifyAlive(message gossdp.AliveMessage) {
-	log.Info().Interface("message", message).Msg("UPnP/SSDP NotifyAlive")
-}
-func (b *ssdpClient) NotifyBye(message gossdp.ByeMessage) {
-	log.Info().Interface("message", message).Msg("UPnP/SSDP NotifyBye")
-}
-func (b *ssdpClient) Response(message gossdp.ResponseMessage) {
-	log.Debug().Interface("message", message).Msg("UPnP/SSDP response")
-	url, err := url.Parse(message.Location)
-	if err != nil {
-		b.response <- err
-		return
-	}
-	b.response <- url
-}
-
-// FindFlamencoManager tries to find a Manager, sending its URL to the returned channel.
-func (f Finder) FindFlamencoManager() <-chan *url.URL {
-	reporter := make(chan *url.URL)
-
-	go func() {
-		defer close(reporter)
-
-		if f.overrideURL != nil {
-			log.Debug().Str("url", f.overrideURL.String()).Msg("Using configured Flamenco Manager URL")
-			reporter <- f.overrideURL
-			return
-		}
-
-		log.Info().Msg("finding Flamenco Manager via UPnP/SSDP")
-		b := ssdpClient{make(chan interface{})}
-
-		client, err := gossdp.NewSsdpClientWithLogger(&b, ZeroLogWrapper{})
-		if err != nil {
-			log.Fatal().Err(err).Msg("Unable to create UPnP/SSDP client")
-			return
-		}
-
-		log.Debug().Msg("Starting UPnP/SSDP client")
-		go client.Start()
-		defer client.Stop()
-
-		if err := client.ListenFor("urn:flamenco:manager:0"); err != nil {
-			log.Error().Err(err).Msg("unable to find Manager")
-			return
-		}
-
-		log.Debug().Msg("Waiting for UPnP/SSDP answer")
-		urlOrErr := <-b.response
-		switch v := urlOrErr.(type) {
-		case *url.URL:
-			reporter <- v
-		case error:
-			log.Fatal().Err(v).Msg("Error waiting for UPnP/SSDP response from Manager")
-		}
-	}()
-
-	return reporter
-}

internal/worker/ssdp/zerolog.go

@@ -1,44 +0,0 @@
-package ssdp
-
-/* ***** BEGIN GPL LICENSE BLOCK *****
- *
- * Original Code Copyright (C) 2022 Blender Foundation.
- *
- * This file is part of Flamenco.
- *
- * Flamenco is free software: you can redistribute it and/or modify it under
- * the terms of the GNU General Public License as published by the Free Software
- * Foundation, either version 3 of the License, or (at your option) any later
- * version.
- *
- * Flamenco is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * Flamenco.  If not, see <https://www.gnu.org/licenses/>.
- *
- * ***** END GPL LICENSE BLOCK ***** */
-import (
-	"fmt"
-
-	"github.com/rs/zerolog/log"
-	"gitlab.com/blender-institute/gossdp"
-)
-
-var _ gossdp.LoggerInterface = ZeroLogWrapper{}
-
-type ZeroLogWrapper struct{}
-
-func (l ZeroLogWrapper) Debugf(msg string, args ...interface{}) {
-	log.Debug().Msg(fmt.Sprintf(msg, args...))
-}
-func (l ZeroLogWrapper) Infof(msg string, args ...interface{}) {
-	log.Info().Msg(fmt.Sprintf(msg, args...))
-}
-func (l ZeroLogWrapper) Warnf(msg string, args ...interface{}) {
-	log.Warn().Msg(fmt.Sprintf(msg, args...))
-}
-func (l ZeroLogWrapper) Errorf(msg string, args ...interface{}) {
-	log.Error().Msg(fmt.Sprintf(msg, args...))
-}

internal/worker/state_asleep.go

@@ -0,0 +1,66 @@
+package worker
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/rs/zerolog/log"
+	"gitlab.com/blender/flamenco-ng-poc/pkg/api"
+)
+
+const durationSleepCheck = 3 * time.Second
+
+func (w *Worker) gotoStateAsleep(ctx context.Context) {
+	w.stateMutex.Lock()
+	defer w.stateMutex.Unlock()
+
+	w.state = api.WorkerStatusAsleep
+	w.doneWg.Add(2)
+	go w.ackStateChange(ctx, w.state)
+	go w.runStateAsleep(ctx)
+}
+
+func (w *Worker) runStateAsleep(ctx context.Context) {
+	defer w.doneWg.Done()
+	logger := log.With().Str("status", string(w.state)).Logger()
+	logger.Info().Msg("sleeping")
+
+	for {
+		select {
+		case <-ctx.Done():
+			logger.Debug().Msg("state fetching interrupted by context cancellation")
+			return
+		case <-w.doneChan:
+			logger.Debug().Msg("state fetching interrupted by shutdown")
+			return
+		case <-time.After(durationSleepCheck):
+		}
+		if !w.isState(api.WorkerStatusAwake) {
+			logger.Debug().Msg("state fetching interrupted by state change")
+			return
+		}
+
+		resp, err := w.client.WorkerStateWithResponse(ctx)
+		if err != nil {
+			log.Error().Err(err).Msg("error checking upstream state changes")
+		}
+		switch {
+		case resp.JSON200 != nil:
+			log.Info().
+				Str("requestedStatus", string(resp.JSON200.StatusRequested)).
+				Msg("Manager requests status change")
+			w.changeState(ctx, resp.JSON200.StatusRequested)
+			return
+		case resp.StatusCode() == http.StatusNoContent:
+			log.Debug().Msg("we can keep sleeping")
+			continue
+		default:
+			log.Warn().
+				Int("code", resp.StatusCode()).
+				Str("error", string(resp.Body)).
+				Msg("unable to obtain requested state for unknown reason")
+			continue
+		}
+	}
+}

internal/worker/state_awake.go

@@ -0,0 +1,106 @@
+package worker
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"time"
+
+	"github.com/rs/zerolog/log"
+	"gitlab.com/blender/flamenco-ng-poc/pkg/api"
+)
+
+const (
+	// How long to wait to fetch another task...
+	durationNoTask      = 5 * time.Second  // ... if there is no task now.
+	durationFetchFailed = 10 * time.Second // ... if fetching failed somehow.
+)
+
+var (
+	errUnknownTaskRequestStatus = errors.New("unknown task request status")
+	errReregistrationRequired   = errors.New("re-registration is required")
+)
+
+func (w *Worker) gotoStateAwake(ctx context.Context) {
+	w.stateMutex.Lock()
+	defer w.stateMutex.Unlock()
+
+	w.state = api.WorkerStatusAwake
+
+	w.doneWg.Add(2)
+	go w.ackStateChange(ctx, w.state)
+	go w.runStateAwake(ctx)
+}
+
+func (w *Worker) runStateAwake(ctx context.Context) {
+	defer w.doneWg.Done()
+	task := w.fetchTask(ctx)
+	if task == nil {
+		return
+	}
+
+	// TODO: actually execute the task
+	log.Error().Interface("task", *task).Msg("task execution not implemented yet")
+}
+
+// fetchTasks periodically tries to fetch a task from the Manager, returning it when obtained.
+// Returns nil when a task could not be obtained and the period loop was cancelled.
+func (w *Worker) fetchTask(ctx context.Context) *api.AssignedTask {
+	logger := log.With().Str("status", string(w.state)).Logger()
+	logger.Info().Msg("fetching tasks")
+
+	// Initially don't wait at all.
+	var wait time.Duration
+
+	for {
+		select {
+		case <-ctx.Done():
+			logger.Debug().Msg("task fetching interrupted by context cancellation")
+			return nil
+		case <-w.doneChan:
+			logger.Debug().Msg("task fetching interrupted by shutdown")
+			return nil
+		case <-time.After(wait):
+		}
+		if !w.isState(api.WorkerStatusAwake) {
+			logger.Debug().Msg("task fetching interrupted by state change")
+			return nil
+		}
+
+		resp, err := w.client.ScheduleTaskWithResponse(ctx)
+		if err != nil {
+			log.Error().Err(err).Msg("error obtaining task")
+		}
+		switch {
+		case resp.JSON200 != nil:
+			log.Info().
+				Interface("task", resp.JSON200).
+				Msg("obtained task")
+			return resp.JSON200
+		case resp.JSON423 != nil:
+			log.Info().
+				Str("requestedStatus", string(resp.JSON423.StatusRequested)).
+				Msg("Manager requests status change")
+			w.changeState(ctx, resp.JSON423.StatusRequested)
+			return nil
+		case resp.JSON403 != nil:
+			log.Error().
+				Int("code", resp.StatusCode()).
+				Str("error", string(resp.JSON403.Message)).
+				Msg("access denied")
+			wait = durationFetchFailed
+			continue
+		case resp.StatusCode() == http.StatusNoContent:
+			log.Info().Msg("no task available")
+			wait = durationNoTask
+			continue
+		default:
+			log.Warn().
+				Int("code", resp.StatusCode()).
+				Str("error", string(resp.Body)).
+				Msg("unable to obtain task for unknown reason")
+			wait = durationFetchFailed
+			continue
+		}
+	}
+}

internal/worker/state_shutdown.go

@@ -0,0 +1,49 @@
+package worker
+
+import (
+	"context"
+	"os"
+
+	"github.com/rs/zerolog/log"
+	"gitlab.com/blender/flamenco-ng-poc/pkg/api"
+)
+
+func (w *Worker) gotoStateShutdown(context.Context) {
+	w.stateMutex.Lock()
+	defer w.stateMutex.Unlock()
+
+	w.state = api.WorkerStatusShutdown
+
+	logger := log.With().Int("pid", os.Getpid()).Logger()
+	proc, err := os.FindProcess(os.Getpid())
+	if err != nil {
+		logger.Fatal().Err(err).Msg("unable to find our own process for clean shutdown")
+	}
+
+	logger.Warn().Msg("sending our own process an interrupt signal")
+	err = proc.Signal(os.Interrupt)
+	if err != nil {
+		logger.Fatal().Err(err).Msg("unable to find send interrupt signal to our own process")
+	}
+}
+
+// SignOff forces the worker in shutdown state and acknlowedges this to the Manager.
+// Does NOT actually peform a shutdown; is intended to be called while shutdown is in progress.
+func (w *Worker) SignOff(ctx context.Context) {
+	w.stateMutex.Lock()
+	w.state = api.WorkerStatusShutdown
+	logger := log.With().Str("state", string(w.state)).Logger()
+	w.stateMutex.Unlock()
+
+	logger.Info().Msg("signing off at Manager")
+
+	resp, err := w.client.SignOffWithResponse(ctx)
+	if err != nil {
+		logger.Error().Err(err).Msg("unable to sign off at Manager")
+		return
+	}
+	if resp.JSONDefault != nil {
+		logger.Error().Interface("error", resp.JSONDefault).Msg("error received when signing off at Manager")
+		return
+	}
+}

internal/worker/statemachine.go

@@ -0,0 +1,70 @@
+package worker
+
+import (
+	"context"
+
+	"github.com/rs/zerolog/log"
+	"gitlab.com/blender/flamenco-ng-poc/pkg/api"
+)
+
+func (w *Worker) setupStateMachine() {
+	w.stateStarters[api.WorkerStatusAsleep] = w.gotoStateAsleep
+	w.stateStarters[api.WorkerStatusAwake] = w.gotoStateAwake
+	w.stateStarters[api.WorkerStatusShutdown] = w.gotoStateShutdown
+}
+
+// Called whenever the Flamenco Manager has a change in current status for us.
+func (w *Worker) changeState(ctx context.Context, newState api.WorkerStatus) {
+	w.stateMutex.Lock()
+	logger := log.With().
+		Str("newState", string(newState)).
+		Str("curState", string(w.state)).
+		Logger()
+	w.stateMutex.Unlock()
+
+	logger.Info().Msg("state change")
+
+	starter, ok := w.stateStarters[newState]
+	if !ok {
+		logger.Warn().Interface("available", w.stateStarters).Msg("no state starter for this state, going to sleep instead")
+		starter = w.gotoStateAsleep
+	}
+	starter(ctx)
+}
+
+// Confirm that we're now in a certain state.
+//
+// This ACK can be given without a request from the server, for example to support
+// state changes originating from UNIX signals.
+//
+// The state is passed as string so that this function can run independently of
+// the current w.state (for thread-safety)
+func (w *Worker) ackStateChange(ctx context.Context, state api.WorkerStatus) {
+	defer w.doneWg.Done()
+
+	req := api.WorkerStateChangedJSONRequestBody{Status: state}
+
+	logger := log.With().Str("state", string(state)).Logger()
+	logger.Debug().Msg("notifying Manager of our state")
+
+	resp, err := w.client.WorkerStateChangedWithResponse(ctx, req)
+	if err != nil {
+		logger.Warn().Err(err).Msg("unable to notify Manager of status change")
+		return
+	}
+
+	// The 'default' response is for error cases.
+	if resp.JSONDefault != nil {
+		logger.Warn().
+			Str("httpCode", resp.HTTPResponse.Status).
+			Interface("error", resp.JSONDefault).
+			Msg("error sending status change to Manager")
+		return
+	}
+}
+
+func (w *Worker) isState(state api.WorkerStatus) bool {
+	w.stateMutex.Lock()
+	defer w.stateMutex.Unlock()
+	return w.state == state
+}

internal/worker/worker.go

@@ -3,21 +3,12 @@ package worker
 import (
 	"context"
 	"errors"
-	"net/url"
-	"os"
 	"sync"
-	"time"
 
 	"github.com/rs/zerolog/log"
 	"gitlab.com/blender/flamenco-ng-poc/pkg/api"
 )
 
-const (
-	requestRetry        = 5 * time.Second
-	credentialsFilename = "flamenco-worker-credentials.yaml"
-	configFilename      = "flamenco-worker.yaml"
-)
-
 var (
 	errRequestAborted = errors.New("request to Manager aborted")
 )
@@ -27,32 +18,22 @@ type Worker struct {
 	doneChan chan struct{}
 	doneWg   *sync.WaitGroup
 
-	manager *url.URL
 	client api.ClientWithResponsesInterface
-	creds   *workerCredentials
 
 	state         api.WorkerStatus
-	stateStarters map[string]func() // gotoStateXXX functions
+	stateStarters map[api.WorkerStatus]StateStarter // gotoStateXXX functions
 	stateMutex    *sync.Mutex
 
 	taskRunner TaskRunner
-
-	configWrangler ConfigWrangler
-	config         WorkerConfig
-	managerFinder  ManagerFinder
 }
 
-type ManagerFinder interface {
+type StateStarter func(context.Context)
-	FindFlamencoManager() <-chan *url.URL
-}
 
 type TaskRunner interface{}
 
 // NewWorker constructs and returns a new Worker.
 func NewWorker(
 	flamenco api.ClientWithResponsesInterface,
-	configWrangler ConfigWrangler,
-	managerFinder ManagerFinder,
 	taskRunner TaskRunner,
 ) *Worker {
 
@@ -63,77 +44,18 @@ func NewWorker(
 		client: flamenco,
 
 		state:         api.WorkerStatusStarting,
-		stateStarters: make(map[string]func()),
+		stateStarters: make(map[api.WorkerStatus]StateStarter),
 		stateMutex:    new(sync.Mutex),
 
-		// taskRunner: taskRunner,
+		taskRunner: taskRunner,
-
-		configWrangler: configWrangler,
-		managerFinder:  managerFinder,
 	}
-	// worker.setupStateMachine()
+	worker.setupStateMachine()
-	worker.loadConfig()
 	return worker
 }
 
-func (w *Worker) start(ctx context.Context, register bool) {
+// Start starts the worker by sending it to the given state.
-	w.doneWg.Add(1)
+func (w *Worker) Start(ctx context.Context, state api.WorkerStatus) {
-	defer w.doneWg.Done()
+	w.changeState(ctx, state)
-
-	w.loadCredentials()
-
-	if w.creds == nil || register {
-		w.register(ctx)
-	}
-
-	startState := w.signOn(ctx)
-	log.Error().Str("state", string(startState)).Msg("here the road ends, nothing else is implemented")
-	// w.changeState(startState)
-}
-
-func (w *Worker) loadCredentials() {
-	log.Debug().Msg("loading credentials")
-
-	w.creds = &workerCredentials{}
-	err := w.configWrangler.LoadConfig(credentialsFilename, w.creds)
-	if err != nil {
-		log.Warn().Err(err).Str("file", credentialsFilename).
-			Msg("unable to load credentials configuration file")
-		w.creds = nil
-		return
-	}
-}
-
-func (w *Worker) loadConfig() {
-	logger := log.With().Str("filename", configFilename).Logger()
-	err := w.configWrangler.LoadConfig(configFilename, &w.config)
-	if os.IsNotExist(err) {
-		logger.Info().Msg("writing default configuration file")
-		w.config = w.configWrangler.DefaultConfig()
-		w.saveConfig()
-		err = w.configWrangler.LoadConfig(configFilename, &w.config)
-	}
-	if err != nil {
-		logger.Fatal().Err(err).Msg("unable to load config file")
-	}
-
-	if w.config.Manager != "" {
-		w.manager, err = ParseURL(w.config.Manager)
-		if err != nil {
-			logger.Fatal().Err(err).Str("url", w.config.Manager).
-				Msg("unable to parse manager URL")
-		}
-		logger.Debug().Str("url", w.config.Manager).Msg("parsed manager URL")
-	}
-
-}
-
-func (w *Worker) saveConfig() {
-	err := w.configWrangler.WriteConfig(configFilename, "Configuration", w.config)
-	if err != nil {
-		log.Warn().Err(err).Str("filename", configFilename).
-			Msg("unable to write configuration file")
-	}
 }
 
 // Close gracefully shuts down the Worker.

pkg/api/flamenco-manager.yaml

@@ -67,6 +67,69 @@ paths:
               schema:
                 $ref: '#/components/schemas/Error'
 
+  /api/worker/sign-off:
+    summary: Called by Workers to let the Manager know they're going offline.
+    post:
+      summary: Mark the worker as offline
+      operationId: signOff
+      security: [{worker_auth: []}]
+      tags: [worker]
+      responses:
+        "204":
+          description: normal response
+        default:
+          description: unexpected error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+
+  /api/worker/state:
+    summary: Called by Workers to check whether there is any state change requested.
+    get:
+      operationId: workerState
+      security: [{worker_auth: []}]
+      tags: [worker]
+      responses:
+        "204":
+          description: no state change requested
+        "200":
+          description: state change requested
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/WorkerStateChange"
+        default:
+          description: unexpected error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+
+  /api/worker/state-changed:
+    summary: Called by Workers to let the Manager know they've changed status.
+    post:
+      summary: Worker changed state. This could be as acknowledgement of a Manager-requested state change, or in response to worker-local signals.
+      operationId: workerStateChanged
+      security: [{worker_auth: []}]
+      tags: [worker]
+      requestBody:
+        description: New worker state
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/WorkerStateChanged"
+      responses:
+        "204":
+          description: normal response
+        default:
+          description: unexpected error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+
   /api/worker/task:
     summary: Task scheduler endpoint.
     post:
@@ -87,6 +150,12 @@ paths:
           content:
             application/json:
               schema: {$ref: "#/components/schemas/SecurityError"}
+        "423":
+          description: Worker cannot obtain new tasks, but must go to another state.
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/WorkerStateChange"
 
   /api/jobs/types:
     summary: Available Flamenco job types.
@@ -180,7 +249,7 @@ components:
 
     WorkerStatus:
       type: string
-      enum: [starting, awake, asleep, error, shutting-down, testing]
+      enum: [starting, awake, asleep, error, shutdown, testing, offline]
 
     WorkerSignOn:
       type: object
@@ -197,6 +266,12 @@ components:
         status_requested: {$ref: "#/components/schemas/WorkerStatus"}
       required: [status_requested]
 
+    WorkerStateChanged:
+      type: object
+      properties:
+        status: {$ref: "#/components/schemas/WorkerStatus"}
+      required: [status]
+
     AssignedTask:
       type: object
       description: AssignedTask is a task as it is received by the Worker.

pkg/api/openapi_client.gen.go

@@ -106,11 +106,22 @@ type ClientInterface interface {
 
 	RegisterWorker(ctx context.Context, body RegisterWorkerJSONRequestBody, reqEditors ...RequestEditorFn) (*http.Response, error)
 
+	// SignOff request
+	SignOff(ctx context.Context, reqEditors ...RequestEditorFn) (*http.Response, error)
+
 	// SignOn request with any body
 	SignOnWithBody(ctx context.Context, contentType string, body io.Reader, reqEditors ...RequestEditorFn) (*http.Response, error)
 
 	SignOn(ctx context.Context, body SignOnJSONRequestBody, reqEditors ...RequestEditorFn) (*http.Response, error)
 
+	// WorkerState request
+	WorkerState(ctx context.Context, reqEditors ...RequestEditorFn) (*http.Response, error)
+
+	// WorkerStateChanged request with any body
+	WorkerStateChangedWithBody(ctx context.Context, contentType string, body io.Reader, reqEditors ...RequestEditorFn) (*http.Response, error)
+
+	WorkerStateChanged(ctx context.Context, body WorkerStateChangedJSONRequestBody, reqEditors ...RequestEditorFn) (*http.Response, error)
+
 	// ScheduleTask request
 	ScheduleTask(ctx context.Context, reqEditors ...RequestEditorFn) (*http.Response, error)
 }
@@ -187,6 +198,18 @@ func (c *Client) RegisterWorker(ctx context.Context, body RegisterWorkerJSONRequ
 	return c.Client.Do(req)
 }
 
+func (c *Client) SignOff(ctx context.Context, reqEditors ...RequestEditorFn) (*http.Response, error) {
+	req, err := NewSignOffRequest(c.Server)
+	if err != nil {
+		return nil, err
+	}
+	req = req.WithContext(ctx)
+	if err := c.applyEditors(ctx, req, reqEditors); err != nil {
+		return nil, err
+	}
+	return c.Client.Do(req)
+}
+
 func (c *Client) SignOnWithBody(ctx context.Context, contentType string, body io.Reader, reqEditors ...RequestEditorFn) (*http.Response, error) {
 	req, err := NewSignOnRequestWithBody(c.Server, contentType, body)
 	if err != nil {
@@ -211,6 +234,42 @@ func (c *Client) SignOn(ctx context.Context, body SignOnJSONRequestBody, reqEdit
 	return c.Client.Do(req)
 }
 
+func (c *Client) WorkerState(ctx context.Context, reqEditors ...RequestEditorFn) (*http.Response, error) {
+	req, err := NewWorkerStateRequest(c.Server)
+	if err != nil {
+		return nil, err
+	}
+	req = req.WithContext(ctx)
+	if err := c.applyEditors(ctx, req, reqEditors); err != nil {
+		return nil, err
+	}
+	return c.Client.Do(req)
+}
+
+func (c *Client) WorkerStateChangedWithBody(ctx context.Context, contentType string, body io.Reader, reqEditors ...RequestEditorFn) (*http.Response, error) {
+	req, err := NewWorkerStateChangedRequestWithBody(c.Server, contentType, body)
+	if err != nil {
+		return nil, err
+	}
+	req = req.WithContext(ctx)
+	if err := c.applyEditors(ctx, req, reqEditors); err != nil {
+		return nil, err
+	}
+	return c.Client.Do(req)
+}
+
+func (c *Client) WorkerStateChanged(ctx context.Context, body WorkerStateChangedJSONRequestBody, reqEditors ...RequestEditorFn) (*http.Response, error) {
+	req, err := NewWorkerStateChangedRequest(c.Server, body)
+	if err != nil {
+		return nil, err
+	}
+	req = req.WithContext(ctx)
+	if err := c.applyEditors(ctx, req, reqEditors); err != nil {
+		return nil, err
+	}
+	return c.Client.Do(req)
+}
+
 func (c *Client) ScheduleTask(ctx context.Context, reqEditors ...RequestEditorFn) (*http.Response, error) {
 	req, err := NewScheduleTaskRequest(c.Server)
 	if err != nil {
@@ -364,6 +423,33 @@ func NewRegisterWorkerRequestWithBody(server string, contentType string, body io
 	return req, nil
 }
 
+// NewSignOffRequest generates requests for SignOff
+func NewSignOffRequest(server string) (*http.Request, error) {
+	var err error
+
+	serverURL, err := url.Parse(server)
+	if err != nil {
+		return nil, err
+	}
+
+	operationPath := fmt.Sprintf("/api/worker/sign-off")
+	if operationPath[0] == '/' {
+		operationPath = "." + operationPath
+	}
+
+	queryURL, err := serverURL.Parse(operationPath)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequest("POST", queryURL.String(), nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return req, nil
+}
+
 // NewSignOnRequest calls the generic SignOn builder with application/json body
 func NewSignOnRequest(server string, body SignOnJSONRequestBody) (*http.Request, error) {
 	var bodyReader io.Reader
@@ -404,6 +490,73 @@ func NewSignOnRequestWithBody(server string, contentType string, body io.Reader)
 	return req, nil
 }
 
+// NewWorkerStateRequest generates requests for WorkerState
+func NewWorkerStateRequest(server string) (*http.Request, error) {
+	var err error
+
+	serverURL, err := url.Parse(server)
+	if err != nil {
+		return nil, err
+	}
+
+	operationPath := fmt.Sprintf("/api/worker/state")
+	if operationPath[0] == '/' {
+		operationPath = "." + operationPath
+	}
+
+	queryURL, err := serverURL.Parse(operationPath)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequest("GET", queryURL.String(), nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return req, nil
+}
+
+// NewWorkerStateChangedRequest calls the generic WorkerStateChanged builder with application/json body
+func NewWorkerStateChangedRequest(server string, body WorkerStateChangedJSONRequestBody) (*http.Request, error) {
+	var bodyReader io.Reader
+	buf, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	bodyReader = bytes.NewReader(buf)
+	return NewWorkerStateChangedRequestWithBody(server, "application/json", bodyReader)
+}
+
+// NewWorkerStateChangedRequestWithBody generates requests for WorkerStateChanged with any type of body
+func NewWorkerStateChangedRequestWithBody(server string, contentType string, body io.Reader) (*http.Request, error) {
+	var err error
+
+	serverURL, err := url.Parse(server)
+	if err != nil {
+		return nil, err
+	}
+
+	operationPath := fmt.Sprintf("/api/worker/state-changed")
+	if operationPath[0] == '/' {
+		operationPath = "." + operationPath
+	}
+
+	queryURL, err := serverURL.Parse(operationPath)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequest("POST", queryURL.String(), body)
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Add("Content-Type", contentType)
+
+	return req, nil
+}
+
 // NewScheduleTaskRequest generates requests for ScheduleTask
 func NewScheduleTaskRequest(server string) (*http.Request, error) {
 	var err error
@@ -490,11 +643,22 @@ type ClientWithResponsesInterface interface {
 
 	RegisterWorkerWithResponse(ctx context.Context, body RegisterWorkerJSONRequestBody, reqEditors ...RequestEditorFn) (*RegisterWorkerResponse, error)
 
+	// SignOff request
+	SignOffWithResponse(ctx context.Context, reqEditors ...RequestEditorFn) (*SignOffResponse, error)
+
 	// SignOn request with any body
 	SignOnWithBodyWithResponse(ctx context.Context, contentType string, body io.Reader, reqEditors ...RequestEditorFn) (*SignOnResponse, error)
 
 	SignOnWithResponse(ctx context.Context, body SignOnJSONRequestBody, reqEditors ...RequestEditorFn) (*SignOnResponse, error)
 
+	// WorkerState request
+	WorkerStateWithResponse(ctx context.Context, reqEditors ...RequestEditorFn) (*WorkerStateResponse, error)
+
+	// WorkerStateChanged request with any body
+	WorkerStateChangedWithBodyWithResponse(ctx context.Context, contentType string, body io.Reader, reqEditors ...RequestEditorFn) (*WorkerStateChangedResponse, error)
+
+	WorkerStateChangedWithResponse(ctx context.Context, body WorkerStateChangedJSONRequestBody, reqEditors ...RequestEditorFn) (*WorkerStateChangedResponse, error)
+
 	// ScheduleTask request
 	ScheduleTaskWithResponse(ctx context.Context, reqEditors ...RequestEditorFn) (*ScheduleTaskResponse, error)
 }
@@ -589,6 +753,28 @@ func (r RegisterWorkerResponse) StatusCode() int {
 	return 0
 }
 
+type SignOffResponse struct {
+	Body         []byte
+	HTTPResponse *http.Response
+	JSONDefault  *Error
+}
+
+// Status returns HTTPResponse.Status
+func (r SignOffResponse) Status() string {
+	if r.HTTPResponse != nil {
+		return r.HTTPResponse.Status
+	}
+	return http.StatusText(0)
+}
+
+// StatusCode returns HTTPResponse.StatusCode
+func (r SignOffResponse) StatusCode() int {
+	if r.HTTPResponse != nil {
+		return r.HTTPResponse.StatusCode
+	}
+	return 0
+}
+
 type SignOnResponse struct {
 	Body         []byte
 	HTTPResponse *http.Response
@@ -612,11 +798,57 @@ func (r SignOnResponse) StatusCode() int {
 	return 0
 }
 
+type WorkerStateResponse struct {
+	Body         []byte
+	HTTPResponse *http.Response
+	JSON200      *WorkerStateChange
+	JSONDefault  *Error
+}
+
+// Status returns HTTPResponse.Status
+func (r WorkerStateResponse) Status() string {
+	if r.HTTPResponse != nil {
+		return r.HTTPResponse.Status
+	}
+	return http.StatusText(0)
+}
+
+// StatusCode returns HTTPResponse.StatusCode
+func (r WorkerStateResponse) StatusCode() int {
+	if r.HTTPResponse != nil {
+		return r.HTTPResponse.StatusCode
+	}
+	return 0
+}
+
+type WorkerStateChangedResponse struct {
+	Body         []byte
+	HTTPResponse *http.Response
+	JSONDefault  *Error
+}
+
+// Status returns HTTPResponse.Status
+func (r WorkerStateChangedResponse) Status() string {
+	if r.HTTPResponse != nil {
+		return r.HTTPResponse.Status
+	}
+	return http.StatusText(0)
+}
+
+// StatusCode returns HTTPResponse.StatusCode
+func (r WorkerStateChangedResponse) StatusCode() int {
+	if r.HTTPResponse != nil {
+		return r.HTTPResponse.StatusCode
+	}
+	return 0
+}
+
 type ScheduleTaskResponse struct {
 	Body         []byte
 	HTTPResponse *http.Response
 	JSON200      *AssignedTask
 	JSON403      *SecurityError
+	JSON423      *WorkerStateChange
 }
 
 // Status returns HTTPResponse.Status
@@ -687,6 +919,15 @@ func (c *ClientWithResponses) RegisterWorkerWithResponse(ctx context.Context, bo
 	return ParseRegisterWorkerResponse(rsp)
 }
 
+// SignOffWithResponse request returning *SignOffResponse
+func (c *ClientWithResponses) SignOffWithResponse(ctx context.Context, reqEditors ...RequestEditorFn) (*SignOffResponse, error) {
+	rsp, err := c.SignOff(ctx, reqEditors...)
+	if err != nil {
+		return nil, err
+	}
+	return ParseSignOffResponse(rsp)
+}
+
 // SignOnWithBodyWithResponse request with arbitrary body returning *SignOnResponse
 func (c *ClientWithResponses) SignOnWithBodyWithResponse(ctx context.Context, contentType string, body io.Reader, reqEditors ...RequestEditorFn) (*SignOnResponse, error) {
 	rsp, err := c.SignOnWithBody(ctx, contentType, body, reqEditors...)
@@ -704,6 +945,32 @@ func (c *ClientWithResponses) SignOnWithResponse(ctx context.Context, body SignO
 	return ParseSignOnResponse(rsp)
 }
 
+// WorkerStateWithResponse request returning *WorkerStateResponse
+func (c *ClientWithResponses) WorkerStateWithResponse(ctx context.Context, reqEditors ...RequestEditorFn) (*WorkerStateResponse, error) {
+	rsp, err := c.WorkerState(ctx, reqEditors...)
+	if err != nil {
+		return nil, err
+	}
+	return ParseWorkerStateResponse(rsp)
+}
+
+// WorkerStateChangedWithBodyWithResponse request with arbitrary body returning *WorkerStateChangedResponse
+func (c *ClientWithResponses) WorkerStateChangedWithBodyWithResponse(ctx context.Context, contentType string, body io.Reader, reqEditors ...RequestEditorFn) (*WorkerStateChangedResponse, error) {
+	rsp, err := c.WorkerStateChangedWithBody(ctx, contentType, body, reqEditors...)
+	if err != nil {
+		return nil, err
+	}
+	return ParseWorkerStateChangedResponse(rsp)
+}
+
+func (c *ClientWithResponses) WorkerStateChangedWithResponse(ctx context.Context, body WorkerStateChangedJSONRequestBody, reqEditors ...RequestEditorFn) (*WorkerStateChangedResponse, error) {
+	rsp, err := c.WorkerStateChanged(ctx, body, reqEditors...)
+	if err != nil {
+		return nil, err
+	}
+	return ParseWorkerStateChangedResponse(rsp)
+}
+
 // ScheduleTaskWithResponse request returning *ScheduleTaskResponse
 func (c *ClientWithResponses) ScheduleTaskWithResponse(ctx context.Context, reqEditors ...RequestEditorFn) (*ScheduleTaskResponse, error) {
 	rsp, err := c.ScheduleTask(ctx, reqEditors...)
@@ -831,6 +1098,32 @@ func ParseRegisterWorkerResponse(rsp *http.Response) (*RegisterWorkerResponse, e
 	return response, nil
 }
 
+// ParseSignOffResponse parses an HTTP response from a SignOffWithResponse call
+func ParseSignOffResponse(rsp *http.Response) (*SignOffResponse, error) {
+	bodyBytes, err := ioutil.ReadAll(rsp.Body)
+	defer func() { _ = rsp.Body.Close() }()
+	if err != nil {
+		return nil, err
+	}
+
+	response := &SignOffResponse{
+		Body:         bodyBytes,
+		HTTPResponse: rsp,
+	}
+
+	switch {
+	case strings.Contains(rsp.Header.Get("Content-Type"), "json") && true:
+		var dest Error
+		if err := json.Unmarshal(bodyBytes, &dest); err != nil {
+			return nil, err
+		}
+		response.JSONDefault = &dest
+
+	}
+
+	return response, nil
+}
+
 // ParseSignOnResponse parses an HTTP response from a SignOnWithResponse call
 func ParseSignOnResponse(rsp *http.Response) (*SignOnResponse, error) {
 	bodyBytes, err := ioutil.ReadAll(rsp.Body)
@@ -864,6 +1157,65 @@ func ParseSignOnResponse(rsp *http.Response) (*SignOnResponse, error) {
 	return response, nil
 }
 
+// ParseWorkerStateResponse parses an HTTP response from a WorkerStateWithResponse call
+func ParseWorkerStateResponse(rsp *http.Response) (*WorkerStateResponse, error) {
+	bodyBytes, err := ioutil.ReadAll(rsp.Body)
+	defer func() { _ = rsp.Body.Close() }()
+	if err != nil {
+		return nil, err
+	}
+
+	response := &WorkerStateResponse{
+		Body:         bodyBytes,
+		HTTPResponse: rsp,
+	}
+
+	switch {
+	case strings.Contains(rsp.Header.Get("Content-Type"), "json") && rsp.StatusCode == 200:
+		var dest WorkerStateChange
+		if err := json.Unmarshal(bodyBytes, &dest); err != nil {
+			return nil, err
+		}
+		response.JSON200 = &dest
+
+	case strings.Contains(rsp.Header.Get("Content-Type"), "json") && true:
+		var dest Error
+		if err := json.Unmarshal(bodyBytes, &dest); err != nil {
+			return nil, err
+		}
+		response.JSONDefault = &dest
+
+	}
+
+	return response, nil
+}
+
+// ParseWorkerStateChangedResponse parses an HTTP response from a WorkerStateChangedWithResponse call
+func ParseWorkerStateChangedResponse(rsp *http.Response) (*WorkerStateChangedResponse, error) {
+	bodyBytes, err := ioutil.ReadAll(rsp.Body)
+	defer func() { _ = rsp.Body.Close() }()
+	if err != nil {
+		return nil, err
+	}
+
+	response := &WorkerStateChangedResponse{
+		Body:         bodyBytes,
+		HTTPResponse: rsp,
+	}
+
+	switch {
+	case strings.Contains(rsp.Header.Get("Content-Type"), "json") && true:
+		var dest Error
+		if err := json.Unmarshal(bodyBytes, &dest); err != nil {
+			return nil, err
+		}
+		response.JSONDefault = &dest
+
+	}
+
+	return response, nil
+}
+
 // ParseScheduleTaskResponse parses an HTTP response from a ScheduleTaskWithResponse call
 func ParseScheduleTaskResponse(rsp *http.Response) (*ScheduleTaskResponse, error) {
 	bodyBytes, err := ioutil.ReadAll(rsp.Body)
@@ -892,6 +1244,13 @@ func ParseScheduleTaskResponse(rsp *http.Response) (*ScheduleTaskResponse, error
 		}
 		response.JSON403 = &dest
 
+	case strings.Contains(rsp.Header.Get("Content-Type"), "json") && rsp.StatusCode == 423:
+		var dest WorkerStateChange
+		if err := json.Unmarshal(bodyBytes, &dest); err != nil {
+			return nil, err
+		}
+		response.JSON423 = &dest
+
 	}
 
 	return response, nil

pkg/api/openapi_server.gen.go

@@ -25,9 +25,18 @@ type ServerInterface interface {
 	// Register a new worker
 	// (POST /api/worker/register-worker)
 	RegisterWorker(ctx echo.Context) error
+	// Mark the worker as offline
+	// (POST /api/worker/sign-off)
+	SignOff(ctx echo.Context) error
 	// Authenticate & sign in the worker.
 	// (POST /api/worker/sign-on)
 	SignOn(ctx echo.Context) error
+
+	// (GET /api/worker/state)
+	WorkerState(ctx echo.Context) error
+	// Worker changed state. This could be as acknowledgement of a Manager-requested state change, or in response to worker-local signals.
+	// (POST /api/worker/state-changed)
+	WorkerStateChanged(ctx echo.Context) error
 	// Obtain a new task to execute
 	// (POST /api/worker/task)
 	ScheduleTask(ctx echo.Context) error
@@ -81,6 +90,17 @@ func (w *ServerInterfaceWrapper) RegisterWorker(ctx echo.Context) error {
 	return err
 }
 
+// SignOff converts echo context to params.
+func (w *ServerInterfaceWrapper) SignOff(ctx echo.Context) error {
+	var err error
+
+	ctx.Set(Worker_authScopes, []string{""})
+
+	// Invoke the callback with all the unmarshalled arguments
+	err = w.Handler.SignOff(ctx)
+	return err
+}
+
 // SignOn converts echo context to params.
 func (w *ServerInterfaceWrapper) SignOn(ctx echo.Context) error {
 	var err error
@@ -92,6 +112,28 @@ func (w *ServerInterfaceWrapper) SignOn(ctx echo.Context) error {
 	return err
 }
 
+// WorkerState converts echo context to params.
+func (w *ServerInterfaceWrapper) WorkerState(ctx echo.Context) error {
+	var err error
+
+	ctx.Set(Worker_authScopes, []string{""})
+
+	// Invoke the callback with all the unmarshalled arguments
+	err = w.Handler.WorkerState(ctx)
+	return err
+}
+
+// WorkerStateChanged converts echo context to params.
+func (w *ServerInterfaceWrapper) WorkerStateChanged(ctx echo.Context) error {
+	var err error
+
+	ctx.Set(Worker_authScopes, []string{""})
+
+	// Invoke the callback with all the unmarshalled arguments
+	err = w.Handler.WorkerStateChanged(ctx)
+	return err
+}
+
 // ScheduleTask converts echo context to params.
 func (w *ServerInterfaceWrapper) ScheduleTask(ctx echo.Context) error {
 	var err error
@@ -135,7 +177,10 @@ func RegisterHandlersWithBaseURL(router EchoRouter, si ServerInterface, baseURL
 	router.GET(baseURL+"/api/jobs/types", wrapper.GetJobTypes)
 	router.GET(baseURL+"/api/jobs/:job_id", wrapper.FetchJob)
 	router.POST(baseURL+"/api/worker/register-worker", wrapper.RegisterWorker)
+	router.POST(baseURL+"/api/worker/sign-off", wrapper.SignOff)
 	router.POST(baseURL+"/api/worker/sign-on", wrapper.SignOn)
+	router.GET(baseURL+"/api/worker/state", wrapper.WorkerState)
+	router.POST(baseURL+"/api/worker/state-changed", wrapper.WorkerStateChanged)
 	router.POST(baseURL+"/api/worker/task", wrapper.ScheduleTask)
 
 }

pkg/api/openapi_spec.gen.go

@@ -18,53 +18,57 @@ import (
 // Base64 encoded, gzipped, json marshaled Swagger object
 var swaggerSpec = []string{
 
-	"H4sIAAAAAAAC/9Ra3W4ct/V/FWLyB5LgP7srW2kv9qqOHTsykljIKshFLKzODs/uUOKQE5Kj9dYQkIfo",
+	"H4sIAAAAAAAC/9xa224ct/l/FWLyB5LgP7srW24v9qqOHTsyYlvIKshFLKw4w293KHHICcnRemsIyEP0",
-	"m7QBetFc9QWUNyoOyfnc0VdjGWgQGKMheXg+fudz9n2S6aLUCpWzyfx9YrMcC/CPz6wVG4X8BOwF/c3R",
+	"TdoAvWiu+gLKGxUfyTnPaqVactMahjA7PH3H33cYfohSlRdKgrQmmn+ITJpBTt3jU2P4WgI7oeYCfzMw",
-	"ZkaUTmiVzHurTFgGzNETWCYc/W0wQ3GJnK12zOXIftTmAs00SZPS6BKNE+hvyXRRgOL+WTgs/MP/GVwn",
+	"qeaF5UpG884o4YZQYvGJGsIt/taQAr8ERpItsRmQH5S+AD2N4qjQqgBtObhTUpXnVDL3zC3k7uH/NKyi",
-	"8+STWcvcLHI2ex4OJFdp4nYlJvMEjIEd/X2uV3Q6vrbOCLWJ75elEdoIt+tsEMrhBk29I7wdOa6gGF+4",
+	"efTZrCFuFiibPfMLoqs4stsConlEtaZb/H2uElwdXhuruVyH98tCc6W53bYmcGlhDbqa4d+OLJc0Hx+4",
-	"naZ14Ko7xSH9LcJOkgjsxc2MVBbN+EIlOC2stSnAJfPwIh1uvEoTgz9XwiBP5j/Vm0hrkXaUteG9I+JA",
+	"eU9jqS33soPyW/iZyBE1F7sJKQ3o8YGSMxxYKZ1TG839i7g/8SqONPxUcg0smv9YTUKphb0DrzXtLRZ7",
-	"ix2VdblOW3ueNtfr1Tlmjvh8dglCwkria71aoHPE1R6yFkJtJDIb1pleM2Cv9YoRNTsCoFyLLDz26fyY",
+	"UmyJrE113OjztD5eJeeQWqTz6SXlgiYCXqlkAdYiVQPLWnC5FkCMHydqRSh5pRKCu5kRA8oUT/1jd58f",
-	"o2IbcYkqZVIUwnkcXoIUnP6t0DKn6Z1FFolM2Rsld6yyxCPbCpezoDt/Od3dQHTPBkMwclxDJd0+Xyc5",
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+	"V/8KAAD//8XqVAxiLwAA",
 }
 
 // GetSwagger returns the content of the embedded swagger specification file

pkg/api/openapi_types.gen.go

@@ -97,7 +97,9 @@ const (
 
 	WorkerStatusError WorkerStatus = "error"
 
-	WorkerStatusShuttingDown WorkerStatus = "shutting-down"
+	WorkerStatusOffline WorkerStatus = "offline"
+
+	WorkerStatusShutdown WorkerStatus = "shutdown"
 
 	WorkerStatusStarting WorkerStatus = "starting"
 
@@ -253,6 +255,11 @@ type WorkerStateChange struct {
 	StatusRequested WorkerStatus `json:"status_requested"`
 }
 
+// WorkerStateChanged defines model for WorkerStateChanged.
+type WorkerStateChanged struct {
+	Status WorkerStatus `json:"status"`
+}
+
 // WorkerStatus defines model for WorkerStatus.
 type WorkerStatus string
 
@@ -265,6 +272,9 @@ type RegisterWorkerJSONBody WorkerRegistration
 // SignOnJSONBody defines parameters for SignOn.
 type SignOnJSONBody WorkerSignOn
 
+// WorkerStateChangedJSONBody defines parameters for WorkerStateChanged.
+type WorkerStateChangedJSONBody WorkerStateChanged
+
 // SubmitJobJSONRequestBody defines body for SubmitJob for application/json ContentType.
 type SubmitJobJSONRequestBody SubmitJobJSONBody
 
@@ -274,6 +284,9 @@ type RegisterWorkerJSONRequestBody RegisterWorkerJSONBody
 // SignOnJSONRequestBody defines body for SignOn for application/json ContentType.
 type SignOnJSONRequestBody SignOnJSONBody
 
+// WorkerStateChangedJSONRequestBody defines body for WorkerStateChanged for application/json ContentType.
+type WorkerStateChangedJSONRequestBody WorkerStateChangedJSONBody
+
 // Getter for additional properties for JobMetadata. Returns the specified
 // element and whether it was found
 func (a JobMetadata) Get(fieldName string) (value string, found bool) {