apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: mongo
spec:
  replicas: 3
  serviceName: mongo
  selector:
    matchLabels:
      app: mongo
  template:
    metadata:
      labels:
        app: mongo
    spec:
      initContainers:
        - name: init
          image: busybox
          imagePullPolicy: IfNotPresent
          command: 
          - sh
          - -c 
          - |
            sysctl -w net.ipv4.tcp_keepalive_time=300
            sysctl -w net.ipv4.tcp_keepalive_intvl=10
            sysctl -w net.ipv4.tcp_keepalive_probes=3
          securityContext:
            privileged: true
      containers:
        - name: mongo
          image: mongo:6.0
          args:
            - "--auth"
            - "--bind_ip_all"
            - "--replSet=bfs-mongo-rs0"
          imagePullPolicy: IfNotPresent
          env:
            - name: MONGO_INITDB_ROOT_USERNAME
              valueFrom:
                secretKeyRef:
                  name: mongo
                  key: initdb_root_username
            - name: MONGO_INITDB_ROOT_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mongo
                  key: initdb_root_password
          ports:
            - containerPort: 27017
          volumeMounts:
            - name: mongo-data
              mountPath: /data/db
      volumes:
      - name: mongo-data
        hostPath:
          path: /data/mongodb/rs0
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: "app.kubernetes.io/component"
                operator: In
                values:
                - mongo
      tolerations:
        - key: "app.kubernetes.io/component"
          operator: "Equal"
          value: "mongo"
          effect: "NoSchedule"

---
apiVersion: v1
kind: Service
metadata:
  name: mongo
spec:
  ports:
    - name: mongo
      protocol: TCP
      port: 27017
      targetPort: 27017
  type: ClusterIP
  selector:
    app: mongo