########################################################################
# This YAML file desribes a StatefulSet with a service for running and #
# exposing a MongoDB instance.                                         #
# It depends on the configdb and db k8s pvc.                           #
########################################################################

apiVersion: v1
kind: Service
metadata:
  name: mdb-svc
  namespace: default
  labels:
    name: mdb-svc
spec:
  selector:
    app: mdb-ss
  ports:
  - port: 27017
    targetPort: 27017
    name: mdb-port
  type: ClusterIP
  clusterIP: None
---
apiVersion: apps/v1beta1
kind: StatefulSet 
metadata:
  name: mdb-ss
  namespace: default
spec:
  serviceName: mdb-svc
  replicas: 1
  template:
    metadata:
      name: mdb-ss
      labels:
        app: mdb-ss
    spec:
      terminationGracePeriodSeconds: 10
      containers:
      - name: mongodb
        # TODO(FIXME): Do not use latest in production as it is harder to track
        # versions during updates and rollbacks. Also, once fixed, change the
        # imagePullPolicy to IfNotPresent for faster bootup
        image: bigchaindb/mongodb:latest
        imagePullPolicy: Always
        env:
        - name: MONGODB_FQDN
          valueFrom:
            configMapKeyRef:
             name: mdb-fqdn
             key: fqdn
        - name: MONGODB_POD_IP
          valueFrom:
            fieldRef:
              fieldPath: status.podIP
        args:
        - --replica-set-name=bigchain-rs
        - --fqdn=$(MONGODB_FQDN)
        - --port=27017
        - --ip=$(MONGODB_POD_IP)
        securityContext:
          capabilities:
            add:
            - FOWNER
        ports:
        - containerPort: 27017
          hostPort: 27017
          name: mdb-port
          protocol: TCP
        volumeMounts:
        - name: mdb-db
          mountPath: /data/db
        - name: mdb-configdb
          mountPath: /data/configdb
        resources:
          limits:
            cpu: 200m
            memory: 768Mi
        livenessProbe:
          tcpSocket:
            port: mdb-port
          successThreshold: 1
          failureThreshold: 3
          periodSeconds: 15
          timeoutSeconds: 1
      restartPolicy: Always
      volumes:
      - name: mdb-db
        persistentVolumeClaim:
          claimName: mongo-db-claim
      - name: mdb-configdb
        persistentVolumeClaim:
          claimName: mongo-configdb-claim