E2Manager/managers/e2t_shutdown_manager.go

   1 //
   2 // Copyright 2019 AT&T Intellectual Property
   3 // Copyright 2019 Nokia
   4 //
   5 // Licensed under the Apache License, Version 2.0 (the "License");
   6 // you may not use this file except in compliance with the License.
   7 // You may obtain a copy of the License at
   8 //
   9 //      http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing, software
  12 // distributed under the License is distributed on an "AS IS" BASIS,
  13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 // See the License for the specific language governing permissions and
  15 // limitations under the License.
  16 //
  17
  18 //  This source code is part of the near-RT RIC (RAN Intelligent Controller)
  19 //  platform project (RICP).
  20
  21 package managers
  22
  23 import (
  24         "e2mgr/configuration"
  25         "e2mgr/logger"
  26         "e2mgr/services"
  27         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
  28         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  29         "time"
  30 )
  31
  32 type IE2TShutdownManager interface {
  33         Shutdown(e2tInstance *entities.E2TInstance) error
  34 }
  35
  36 type E2TShutdownManager struct {
  37         logger                        *logger.Logger
  38         config                        *configuration.Configuration
  39         rnibDataService               services.RNibDataService
  40         e2TInstancesManager           IE2TInstancesManager
  41         e2tAssociationManager         *E2TAssociationManager
  42         kubernetesManager             *KubernetesManager
  43         ranConnectStatusChangeManager IRanConnectStatusChangeManager
  44 }
  45
  46 func NewE2TShutdownManager(logger *logger.Logger, config *configuration.Configuration, rnibDataService services.RNibDataService, e2TInstancesManager IE2TInstancesManager, e2tAssociationManager *E2TAssociationManager, kubernetes *KubernetesManager, ranConnectStatusChangeManager IRanConnectStatusChangeManager) *E2TShutdownManager {
  47         return &E2TShutdownManager{
  48                 logger:                        logger,
  49                 config:                        config,
  50                 rnibDataService:               rnibDataService,
  51                 e2TInstancesManager:           e2TInstancesManager,
  52                 e2tAssociationManager:         e2tAssociationManager,
  53                 kubernetesManager:             kubernetes,
  54                 ranConnectStatusChangeManager: ranConnectStatusChangeManager,
  55         }
  56 }
  57
  58 func (m E2TShutdownManager) Shutdown(e2tInstance *entities.E2TInstance) error {
  59         m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s is Dead, RIP", e2tInstance.Address)
  60
  61         isE2tInstanceBeingDeleted := m.isE2tInstanceAlreadyBeingDeleted(e2tInstance)
  62         if isE2tInstanceBeingDeleted {
  63                 m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s is already being deleted", e2tInstance.Address)
  64                 return nil
  65         }
  66
  67         //go m.kubernetesManager.DeletePod(e2tInstance.PodName)
  68
  69         err := m.markE2tInstanceToBeDeleted(e2tInstance)
  70         if err != nil {
  71                 m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to mark E2T %s as 'ToBeDeleted'.", e2tInstance.Address)
  72                 return err
  73         }
  74
  75         err = m.clearNodebsAssociation(e2tInstance.AssociatedRanList)
  76         if err != nil {
  77                 m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to clear nodebs association to E2T %s.", e2tInstance.Address)
  78                 return err
  79         }
  80
  81         err = m.e2tAssociationManager.RemoveE2tInstance(e2tInstance)
  82         if err != nil {
  83                 m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to remove E2T %s.", e2tInstance.Address)
  84                 return err
  85         }
  86
  87         m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s was shutdown successfully.", e2tInstance.Address)
  88         return nil
  89 }
  90
  91 func (m E2TShutdownManager) clearNodebsAssociation(ranNamesToBeDissociated []string) error {
  92         for _, ranName := range ranNamesToBeDissociated {
  93                 nodeb, err := m.rnibDataService.GetNodeb(ranName)
  94                 if err != nil {
  95                         m.logger.Warnf("#E2TShutdownManager.associateAndSetupNodebs - Failed to get nodeb %s from db.", ranName)
  96                         _, ok := err.(*common.ResourceNotFoundError)
  97                         if !ok {
  98                                 continue
  99                         }
 100                         return err
 101                 }
 102
 103                 err = m.ranConnectStatusChangeManager.ChangeStatus(nodeb, entities.ConnectionStatus_DISCONNECTED)
 104                 if err != nil {
 105                         return err
 106                 }
 107
 108                 nodeb.AssociatedE2TInstanceAddress = ""
 109                 err = m.rnibDataService.UpdateNodebInfo(nodeb)
 110                 if err != nil {
 111                         m.logger.Errorf("#E2TShutdownManager.clearNodebsAssociation - Failed to save nodeb %s to db.", ranName)
 112                         return err
 113                 }
 114         }
 115         return nil
 116 }
 117
 118 func (m E2TShutdownManager) markE2tInstanceToBeDeleted(e2tInstance *entities.E2TInstance) error {
 119         e2tInstance.State = entities.ToBeDeleted
 120         e2tInstance.DeletionTimestamp = time.Now().UnixNano()
 121
 122         return m.rnibDataService.SaveE2TInstance(e2tInstance)
 123 }
 124
 125 func (m E2TShutdownManager) isE2tInstanceAlreadyBeingDeleted(e2tInstance *entities.E2TInstance) bool {
 126         delta := time.Now().UnixNano() - e2tInstance.DeletionTimestamp
 127         timestampNanosec := int64(time.Duration(m.config.E2TInstanceDeletionTimeoutMs) * time.Millisecond)
 128
 129         return e2tInstance.State == entities.ToBeDeleted && delta <= timestampNanosec
 130 }