k8s 数据持久化

sc pv pvc pod 之间的关系

yaml 代码 (弄一个mysql 的pod )

# services
apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  ports:
    - port: 3306 # service 公开的端口
      targetPort: 3306 # 服务所针对的 pod 上要访问的端口号或名称
      appProtocol: mysql # 此端口的应用程序协议
  selector:
    app: mysql
  clusterIP: None
---
# deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql
spec:
  selector:
    matchLabels:
      app: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
        - image: mysql:5.6
          name: mysql
          env:
            # Use secret in real usage
            - name: MYSQL_ROOT_PASSWORD
              value: "123456"
          ports:
            - containerPort: 3306
              name: mysql
          volumeMounts:
            - name: mysql-persistent-storage
              mountPath: /var/lib/mysql # mysql 容器里面 挂载的路径 (mysql的存储路径 )
      volumes:
        - name: mysql-persistent-storage
          persistentVolumeClaim:
            claimName: mysql-pv-claim  # mysql 申请 挂载 的 pvc 名

---
# pvc  声名要多大的磁盘
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pv-claim
spec:
  storageClassName: local-storage
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
---
# pv  真正的磁盘 磁盘有多大 ，是什么类型的
apiVersion: v1
kind: PersistentVolume
metadata:
  name: mysql-pv-volume
  labels:
    type: local
spec:
  storageClassName: local-storage
  capacity:
    storage: 10Gi
  accessModes: # 卷可以被一个节点以读写方式挂载
    - ReadWriteOnce
  local: # 节点上面  挂在 pv 的 路径
    path: "/mnt/data"
---
# sc  抽象层的磁盘 类型
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: local-storage # sc 名字
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer