k8s添加本地存储类

添加存储类

kubectl create -f - <<EOF
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer
EOF

kubectl patch storageclass local-storage -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

手动创建PV

#指定主机创建，我的主机名是debian，PV的名字不能重复
kubectl get nodes

kubectl create -f - <<EOF
apiVersion: v1
kind: PersistentVolume
metadata:
  name: example-local-pv-1
spec:
  capacity:
    storage: 1Gi
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  local:
    path: /mnt/test
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - debian
EOF

建立PVC

kubectl create -f - <<EOF
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: example-local-claim
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi 
  storageClassName: local-storage
EOF

#注意：此时PVC不会立马绑定到PV，其等待Pod被调度时才会绑定到PV上，当前PVC状态为Pending
kubectl describe pvc example-local-claim

建立应用

kubectl create -f - <<'EOF'
apiVersion: v1
kind: Pod
metadata:
  name: localpv-pod
spec:
  containers:
    - name: localpv-po-container
      image: busybox
      imagePullPolicy: IfNotPresent
      command: [ "/bin/sh", "-c", "while true; do sleep 2; echo $(date) $(hostname)>> /mnt/test/test.log; done" ]	  
      volumeMounts: 
        - mountPath: "/mnt/test"
          name: example-pv-storage
  volumes:
    - name: example-pv-storage
      persistentVolumeClaim:
        claimName: example-local-claim
EOF

tail -f /mnt/test/test.log

删除PV时需要按如下流程执行操作：
删除使用这个PV的Pod
从宿主机移除本地磁盘（比如，umount 它）
删除 PVC
删除 PV