apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: {{ .Values.global.mongodb.appName }}
  namespace: {{.Values.global.mongodb.namespace }}
  labels:
    app: {{ .Values.global.mongodb.appName }}
    version: {{.Values.global.mongodb.version }}
spec:
  revisionHistoryLimit: 1   # keep one replica set to allow rollback
  minReadySeconds: 10
  strategy:
  # indicate which strategy we want for rolling update
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  replicas: {{ .Values.global.mongodb.replicas }}
  selector:
    matchLabels:
      app: {{ .Values.global.mongodb.appName }}
      version: {{.Values.global.mongodb.version }}
  template:
    metadata:
      labels:
        app: {{ .Values.global.mongodb.appName }}
        version: {{.Values.global.mongodb.version }}
    spec:
      serviceAccount: default
      containers:
      - name: {{ .Values.global.mongodb.appName }}
        image: {{ .Values.global.mongodb.image.registry }}/{{ .Values.global.mongodb.image.repository }}
        imagePullPolicy: Always               
        env:
        - name: MONGODB_PASSWORD
          valueFrom:
            secretKeyRef:
              name : {{ .Values.global.mongodb.appName }}
              key: mongo_password
        - name: MONGODB_ROOT_PASSWORD
          valueFrom:
            secretKeyRef:
              name : {{ .Values.global.mongodb.appName }}
              key: mongo_root_password
        - name: MONGODB_USERNAME
          value: {{ .Values.global.mongodb.mongodbUsername | quote }}
        - name: MONGODB_DATABASE
          value: {{ .Values.global.mongodb.mongodbDatabase | quote }}
        ports:
        - name: mongodb
          containerPort: 27017
          hostPort: 27017
        resources:
          limits: 
            memory: {{ .Values.global.mongodb.resources.limits.memory }}
            cpu: {{ .Values.global.mongodb.resources.limits.cpu }}
          requests:
            memory: {{ .Values.global.mongodb.resources.requests.memory }}
            cpu: {{ .Values.global.mongodb.resources.requests.cpu }}
        lifecycle:
          postStart:
            exec:
              command: ["/bin/bash", "-c", "cd data/scripts;./init_db.sh"]
        volumeMounts:
           - name: custom-init-scripts
             mountPath: /data/scripts
      volumes:
        - name: custom-init-scripts
          configMap:
            name: {{  .Values.global.mongodb.appName }}-init-scripts
            defaultMode: 0755
      restartPolicy: Always