Kubernetes部署MongoDB

本文为K8s集群部署单节点mongodb，用于业务服务测试。

创建动态持久卷存储

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mongodb-disk
  namespace: default
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi
  storageClassName: alicloud-disk-available
  volumeMode: Filesystem

创建MongoDB工作负载

apiVersion: apps/v1
kind: Deployment
metadata:
  name: mongodb
  namespace: default
  labels:
    app: mongodb
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mongodb
  template:
    metadata:
      labels:
        app: mongodb
    spec:
      containers:
        - name: mongodb
          image:  registry.cn-beijing.cr.aliyuncs.com/mongo:6.0.3
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 27017
          volumeMounts:
            - name: mongodb-disk
              mountPath: /data/db
      volumes:
        - name: mongodb-disk
          persistentVolumeClaim:
            claimName: mongodb-disk
      imagePullSecrets:
        - name: aliyun-docker-registry

创建服务

ClusterIP用于K8s集群内部连接

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

Nodeport用于本地连接

apiVersion: v1
kind: Service
metadata:
  labels:
    app: mongodb
  name: mongodb-nodeport
  namespace: default
spec:
  ports:
    - name: mongo
      nodePort: 32717
      port: 27017
      protocol: TCP
      targetPort: 27017
  selector:
    app: mongodb
  sessionAffinity: None
  type: NodePort

通过上面步骤部署好的MongoDB数据库无需用户名、密码即可连接，如果想要开启权限验证，只需要在YAML文件中入环境变量MONGO_INITDB_ROOT_USERNAME和MONGO_INITDB_ROOT_PASSWORD即可。