[YUNIKORN-2180] Clean up scheduler state initialization

pkg/cache/amprotocol.go

@@ -24,45 +24,6 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
-// app management protocol defines all the APIs needed for app management,
-// this is the protocol between scheduler cache and app management plugins
-type ApplicationManagementProtocol interface {
-	// returns app that already existed in the cache,
-	// or nil, false if app with the given appID is not found
-	GetApplication(appID string) *Application
-
-	// add app to the context, app manager needs to provide all
-	// necessary app metadata through this call. If this a existing app
-	// for recovery, the AddApplicationRequest#Recovery must be true.
-	AddApplication(request *AddApplicationRequest) *Application
-
-	// remove application from the context
-	// returns an error if for some reason the app cannot be removed,
-	// e.g the given app is not found in current context.
-	RemoveApplication(appID string) error
-
-	// add task to the context, if add is successful,
-	AddTask(request *AddTaskRequest) *Task
-
-	// remove task from the app
-	// return an error if for some reason the task cannot be removed
-	// e.g app that owns this task is not found in context.
-	RemoveTask(appID, taskID string)
-
-	// notify the context that an app is completed,
-	// this will trigger some consequent operations for the given app
-	NotifyApplicationComplete(appID string)
-
-	// notify the context that an app has failed,
-	// this will trigger some consequent operations for the given app
-	NotifyApplicationFail(appID string)
-
-	// notify the context that an task is completed,
-	// this will trigger some consequent operations for a given task,
-	// e.g release the allocations that assigned for this task.
-	NotifyTaskComplete(appID, taskID string)
-}
-
 type AddApplicationRequest struct {
 	Metadata ApplicationMetadata
 }

pkg/cache/application.go

@@ -328,8 +328,8 @@
 	app.sm.SetState(state)
 }
 
-func (app *Application) TriggerAppRecovery() error {
-	return app.handle(NewSimpleApplicationEvent(app.applicationID, RecoverApplication))
+func (app *Application) TriggerAppSubmission() error {
+	return app.handle(NewSubmitApplicationEvent(app.applicationID))
 }
 
 // Schedule is called in every scheduling interval,
@@ -406,42 +406,12 @@
 	}
 }
 
-func (app *Application) handleSubmitApplicationEvent() {
+func (app *Application) handleSubmitApplicationEvent() error {
 	log.Log(log.ShimCacheApplication).Info("handle app submission",
 		zap.Stringer("app", app),
 		zap.String("clusterID", conf.GetSchedulerConf().ClusterID))
-	err := app.schedulerAPI.UpdateApplication(
-		&si.ApplicationRequest{
-			New: []*si.AddApplicationRequest{
-				{
-					ApplicationID: app.applicationID,
-					QueueName:     app.queue,
-					PartitionName: app.partition,
-					Ugi: &si.UserGroupInformation{
-						User:   app.user,
-						Groups: app.groups,
-					},
-					Tags:                         app.tags,
-					PlaceholderAsk:               app.placeholderAsk,
-					ExecutionTimeoutMilliSeconds: app.placeholderTimeoutInSec * 1000,
-					GangSchedulingStyle:          app.schedulingStyle,
-				},
-			},
-			RmID: conf.GetSchedulerConf().ClusterID,
-		})
-
-	if err != nil {
-		// submission failed
-		log.Log(log.ShimCacheApplication).Warn("failed to submit app", zap.Error(err))
-		dispatcher.Dispatch(NewFailApplicationEvent(app.applicationID, err.Error()))
-	}
-}
 
-func (app *Application) handleRecoverApplicationEvent() {
-	log.Log(log.ShimCacheApplication).Info("handle app recovering",
-		zap.Stringer("app", app),
-		zap.String("clusterID", conf.GetSchedulerConf().ClusterID))
-	err := app.schedulerAPI.UpdateApplication(
+	if err := app.schedulerAPI.UpdateApplication(
 		&si.ApplicationRequest{
 			New: []*si.AddApplicationRequest{
 				{
@@ -459,13 +429,13 @@
 				},
 			},
 			RmID: conf.GetSchedulerConf().ClusterID,
-		})
-
-	if err != nil {
-		// recovery failed
-		log.Log(log.ShimCacheApplication).Warn("failed to recover app", zap.Error(err))
+		}); err != nil {
+		// submission failed
+		log.Log(log.ShimCacheApplication).Warn("failed to submit new app request to core", zap.Error(err))
 		dispatcher.Dispatch(NewFailApplicationEvent(app.applicationID, err.Error()))
+		return err
 	}
+	return nil
 }
 
 func (app *Application) skipReservationStage() bool {
@@ -573,7 +543,6 @@
 }
 
 func (app *Application) handleCompleteApplicationEvent() {
-	// TODO app lifecycle updates
 	go func() {
 		getPlaceholderManager().cleanUp(app)
 	}()

pkg/cache/application_state.go

@@ -39,7 +39,6 @@ type ApplicationEventType int
 
 const (
 	SubmitApplication ApplicationEventType = iota
-	RecoverApplication
 	AcceptApplication
 	TryReserve
 	UpdateReservation
@@ -361,37 +360,35 @@ func (re ResumingApplicationEvent) GetApplicationID() string {
 var storeApplicationStates *AStates
 
 type AStates struct {
-	New        string
-	Recovering string
-	Submitted  string
-	Accepted   string
-	Reserving  string
-	Running    string
-	Rejected   string
-	Completed  string
-	Killing    string
-	Killed     string
-	Failing    string
-	Failed     string
-	Resuming   string
+	New       string
+	Submitted string
+	Accepted  string
+	Reserving string
+	Running   string
+	Rejected  string
+	Completed string
+	Killing   string
+	Killed    string
+	Failing   string
+	Failed    string
+	Resuming  string
 }
 
 func ApplicationStates() *AStates {
 	applicationStatesOnce.Do(func() {
 		storeApplicationStates = &AStates{
-			New:        "New",
-			Recovering: "Recovering",
-			Submitted:  "Submitted",
-			Accepted:   "Accepted",
-			Reserving:  "Reserving",
-			Running:    "Running",
-			Rejected:   "Rejected",
-			Completed:  "Completed",
-			Killing:    "Killing",
-			Killed:     "Killed",
-			Failed:     "Failed",
-			Failing:    "Failing",
-			Resuming:   "Resuming",
+			New:       "New",
+			Submitted: "Submitted",
+			Accepted:  "Accepted",
+			Reserving: "Reserving",
+			Running:   "Running",
+			Rejected:  "Rejected",
+			Completed: "Completed",
+			Killing:   "Killing",
+			Killed:    "Killed",
+			Failed:    "Failed",
+			Failing:   "Failing",
+			Resuming:  "Resuming",
 		}
 	})
 	return storeApplicationStates
@@ -406,14 +403,9 @@ func newAppState() *fsm.FSM { //nolint:funlen
 				Src:  []string{states.New},
 				Dst:  states.Submitted,
 			},
-			{
-				Name: RecoverApplication.String(),
-				Src:  []string{states.New},
-				Dst:  states.Recovering,
-			},
 			{
 				Name: AcceptApplication.String(),
-				Src:  []string{states.Submitted, states.Recovering},
+				Src:  []string{states.Submitted},
 				Dst:  states.Accepted,
 			},
 			{
@@ -478,7 +470,7 @@ func newAppState() *fsm.FSM { //nolint:funlen
 			},
 			{
 				Name: RejectApplication.String(),
-				Src:  []string{states.Submitted, states.Recovering},
+				Src:  []string{states.Submitted},
 				Dst:  states.Rejected,
 			},
 			{
@@ -517,11 +509,7 @@ func newAppState() *fsm.FSM { //nolint:funlen
 			},
 			SubmitApplication.String(): func(_ context.Context, event *fsm.Event) {
 				app := event.Args[0].(*Application) //nolint:errcheck
-				app.handleSubmitApplicationEvent()
-			},
-			RecoverApplication.String(): func(_ context.Context, event *fsm.Event) {
-				app := event.Args[0].(*Application) //nolint:errcheck
-				app.handleRecoverApplicationEvent()
+				event.Err = app.handleSubmitApplicationEvent()
 			},
 			RejectApplication.String(): func(_ context.Context, event *fsm.Event) {
 				app := event.Args[0].(*Application) //nolint:errcheck