First commit

setup/e2mgr/E2Manager/managers/e2t_shutdown_manager.go

@@ -0,0 +1,124 @@
+//
+// Copyright 2019 AT&T Intellectual Property
+// Copyright 2019 Nokia
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+//  This source code is part of the near-RT RIC (RAN Intelligent Controller)
+//  platform project (RICP).
+
+package managers
+
+import (
+	"e2mgr/configuration"
+	"e2mgr/logger"
+	"e2mgr/services"
+	"gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
+	"gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
+	"time"
+)
+
+type IE2TShutdownManager interface {
+	Shutdown(e2tInstance *entities.E2TInstance) error
+}
+
+type E2TShutdownManager struct {
+	logger                *logger.Logger
+	config                *configuration.Configuration
+	rnibDataService       services.RNibDataService
+	e2TInstancesManager   IE2TInstancesManager
+	e2tAssociationManager *E2TAssociationManager
+	kubernetesManager     *KubernetesManager
+}
+
+func NewE2TShutdownManager(logger *logger.Logger, config *configuration.Configuration, rnibDataService services.RNibDataService, e2TInstancesManager IE2TInstancesManager, e2tAssociationManager *E2TAssociationManager, kubernetes *KubernetesManager) *E2TShutdownManager {
+	return &E2TShutdownManager{
+		logger:                logger,
+		config:                config,
+		rnibDataService:       rnibDataService,
+		e2TInstancesManager:   e2TInstancesManager,
+		e2tAssociationManager: e2tAssociationManager,
+		kubernetesManager:     kubernetes,
+	}
+}
+
+func (m E2TShutdownManager) Shutdown(e2tInstance *entities.E2TInstance) error {
+	m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s is Dead, RIP", e2tInstance.Address)
+
+	isE2tInstanceBeingDeleted := m.isE2tInstanceAlreadyBeingDeleted(e2tInstance)
+	if isE2tInstanceBeingDeleted {
+		m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s is already being deleted", e2tInstance.Address)
+		return nil
+	}
+
+	//go m.kubernetesManager.DeletePod(e2tInstance.PodName)
+
+	err := m.markE2tInstanceToBeDeleted(e2tInstance)
+	if err != nil {
+		m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to mark E2T %s as 'ToBeDeleted'.", e2tInstance.Address)
+		return err
+	}
+
+	err = m.clearNodebsAssociation(e2tInstance.AssociatedRanList)
+	if err != nil {
+		m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to clear nodebs association to E2T %s.", e2tInstance.Address)
+		return err
+	}
+
+	err = m.e2tAssociationManager.RemoveE2tInstance(e2tInstance)
+	if err != nil {
+		m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to remove E2T %s.", e2tInstance.Address)
+		return err
+	}
+
+	m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s was shutdown successfully.", e2tInstance.Address)
+	return nil
+}
+
+func (m E2TShutdownManager) clearNodebsAssociation(ranNamesToBeDissociated []string) error {
+	for _, ranName := range ranNamesToBeDissociated {
+		nodeb, err := m.rnibDataService.GetNodeb(ranName)
+		if err != nil {
+			m.logger.Warnf("#E2TShutdownManager.associateAndSetupNodebs - Failed to get nodeb %s from db.", ranName)
+			_, ok := err.(*common.ResourceNotFoundError)
+			if !ok {
+				continue
+			}
+			return err
+		}
+		nodeb.AssociatedE2TInstanceAddress = ""
+		nodeb.ConnectionStatus = entities.ConnectionStatus_DISCONNECTED
+
+		err = m.rnibDataService.UpdateNodebInfo(nodeb)
+		if err != nil {
+			m.logger.Errorf("#E2TShutdownManager.associateAndSetupNodebs - Failed to save nodeb %s from db.", ranName)
+			return err
+		}
+	}
+	return nil
+}
+
+func (m E2TShutdownManager) markE2tInstanceToBeDeleted(e2tInstance *entities.E2TInstance) error {
+	e2tInstance.State = entities.ToBeDeleted
+	e2tInstance.DeletionTimestamp = time.Now().UnixNano()
+
+	return m.rnibDataService.SaveE2TInstance(e2tInstance)
+}
+
+func (m E2TShutdownManager) isE2tInstanceAlreadyBeingDeleted(e2tInstance *entities.E2TInstance) bool {
+	delta := time.Now().UnixNano() - e2tInstance.DeletionTimestamp
+	timestampNanosec := int64(time.Duration(m.config.E2TInstanceDeletionTimeoutMs) * time.Millisecond)
+
+	return e2tInstance.State == entities.ToBeDeleted && delta <= timestampNanosec
+}