关于k8spv和pvc

作者: root007 分类: 未分类 发布时间: 2019-03-13 18:12
关于pv和pvc 详细介绍 点这里

主要说明静态pvc如何关联到pv

创建应该PV:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: mysql-nfs
spec:
  capacity:
    storage: 50Gi
  accessModes:
    - ReadWriteMany
  nfs:
    server: 192.168.7.206
    path: "/opt/dbdata"

创建应该PVC

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mysql-nfs
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 50Gi

以上创建之后的pvc会自动去匹配满足accessModes,storage 条件的pv,如果有多个相同绑定到其中一个

2、指定pvc绑定到指定的pv

apiVersion: v1
kind: PersistentVolume
metadata:
  name: mysql-nfs
  pv: mysql-nfs
spec:
  capacity:
    storage: 50Gi
  accessModes:
    - ReadWriteMany
  storageClassName: slow
  nfs:
    server: 192.168.7.206
    path: "/opt/dbdata"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  namespaces: dev
  name: mysql-nfs
spec:
  accessModes:
    - ReadWriteMany
  storageClassName: slow
  resources:
    requests:
      storage: 50Gi
  selector:
    matchLabels:
      pv: mysql-nfs

配置:storageClassName: slow。此配置用于绑定PVC和PV。这表明这个PVC希望使用storageClassName=slow的PV。接下来是accessModes = ReadWriteMany。这表明这个PV希望使用storageClassName=slow,并且accessModes = ReadWriteManye的PV。在上述条件都满足后,PVC还可以指定PV必须满足的Label,如matchLabels: pv: mysql-nfs。这表明此PVC希望使用storageClassName=slowaccessModes =
ReadWriteMany 并且拥有Label:
pv: mysql-nfs 的PV。最后是storage: 50Gi。这表明此PVC希望使用50G的Volume资源。

完整的部署mysql单点yaml文件

cat  mysql/mysql-deploy.yaml 
apiVersion: v1
kind: PersistentVolume
metadata:
  name: mysql-nfs
spec:
  capacity:
    storage: 50Gi
  accessModes:
    - ReadWriteMany
  nfs:
    server: 192.168.7.206
    path: "/opt/dbdata"

---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mysql-nfs
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 50Gi
---
apiVersion: v1
kind: Service
metadata:
  name: dev-mysql
  labels:
    app: dev-mysql
spec:
  type: NodePort
  ports:
    - port: 3306
      targetPort: 3306
      protocol: TCP
      nodePort: 32066
  selector:
    app: dev-mysql
    tier: mysql
---
apiVersion: extensions/v1beta1 # for k8s versions before 1.9.0 use apps/v1beta2  and before 1.8.0 use extensions/v1beta1
kind: Deployment
metadata:
  name: dev-mysql
  labels:
    app: dev-mysql
spec:
  selector:
    matchLabels:
      app: dev-mysql
      tier: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: dev-mysql
        tier: mysql
    spec:
      containers:
      - image: 192.168.19.111/baseimages/mysql:5.6
        name: mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: P12345678
        livenessProbe:
          tcpSocket:
            port: 3306
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: tz-config
          mountPath: /etc/localtime
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName:   mysql-nfs
      - name: tz-config
        hostPath:
          path: /usr/share/zoneinfo/Asia/Shanghai

claimName: mysql-nfs对应pvc名称

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