k8s-StorageClass动态创建pvc/pv

1、配置 Deployment，将里面的对应的参数替换成我们自己的 nfs 配置（nfs-client.yaml）

kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: nfs-client-provisioner
spec:
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: nfs-client-provisioner
    spec:
      serviceAccountName: nfs-client-provisioner
      containers:
        - name: nfs-client-provisioner
          image: quay.io/external_storage/nfs-client-provisioner:latest
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: fuseim.pri/ifs
            - name: NFS_SERVER
              value: 10.151.30.57
            - name: NFS_PATH
              value: /data/k8s
      volumes:
        - name: nfs-client-root
          nfs:
            server: 10.151.30.57
            path: /data/k8s

2、nfs-client-sa.yaml 创建rbac

apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-client-provisioner

---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: nfs-client-provisioner-runner
rules:
  - apiGroups: [""]
    resources: ["persistentvolumes"]
    verbs: ["get", "list", "watch", "create", "delete"]
  - apiGroups: [""]
    resources: ["persistentvolumeclaims"]
    verbs: ["get", "list", "watch", "update"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["storageclasses"]
    verbs: ["get", "list", "watch"]
  - apiGroups: [""]
    resources: ["events"]
    verbs: ["list", "watch", "create", "update", "patch"]
  - apiGroups: [""]
    resources: ["endpoints"]
    verbs: ["create", "delete", "get", "list", "watch", "patch", "update"]

---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: run-nfs-client-provisioner
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    namespace: default
roleRef:
  kind: ClusterRole
  name: nfs-client-provisioner-runner
  apiGroup: rbac.authorization.k8s.io

3、StorageClass对象了

nfs-client-class.yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: course-nfs-storage
provisioner: fuseim.pri/ifs # or choose another name, must match deployment's env PROVISIONER_NAME'

4、创建资源对象

kubectl create -f nfs-client.yaml
kubectl create -f nfs-client-sa.yaml
kubectl create -f nfs-client-class.yaml

5、查看

kubectl get pods
NAME                                             READY     STATUS             RESTARTS   AGE
...
nfs-client-provisioner-7648b664bc-7f9pk          1/1       Running            0          7h
...
kubectl get storageclass
NAME                 PROVISIONER      AGE
course-nfs-storage   fuseim.pri/ifs   11s

6、测试

在这个 PVC 对象中添加一个声明 StorageClass 对象的标识，这里我们可以利用一个 annotations 属性来标识　

test-pvc.yaml（volumes方式）

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-pvc
  annotations:
    volume.beta.kubernetes.io/storage-class: "course-nfs-storage"
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 1Mi

使用

test-pod.yaml

kind: Pod
apiVersion: v1
metadata:
  name: test-pod
spec:
  containers:
  - name: test-pod
    image: busybox
    imagePullPolicy: IfNotPresent
    command:
    - "/bin/sh"
    args:
    - "-c"
    - "touch /mnt/SUCCESS && exit 0 || exit 1"
    volumeMounts:
    - name: nfs-pvc
      mountPath: "/mnt"
  restartPolicy: "Never"
  volumes:
  - name: nfs-pvc
    persistentVolumeClaim:
      claimName: test-pvc

　7、测试volumeClaimTemplates 属性来直接使用 StorageClass

test-statefulset-nfs.yaml

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: nfs-web
spec:
  serviceName: "nginx"
  replicas: 3
  template:
    metadata:
      labels:
        app: nfs-web
    spec:
      terminationGracePeriodSeconds: 10
      containers:
      - name: nginx
        image: nginx:1.7.9
        ports:
        - containerPort: 80
          name: web
        volumeMounts:
        - name: www
          mountPath: /usr/share/nginx/html
  volumeClaimTemplates:
  - metadata:
      name: www
      annotations:
        volume.beta.kubernetes.io/storage-class: course-nfs-storage
    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 1Gi

8、检查

　

kubectl create -f test-statefulset-nfs.yaml
statefulset.apps "nfs-web" created
kubectl get pods
NAME                                             READY     STATUS              RESTARTS   AGE
...
nfs-web-0                                        1/1       Running             0          1m
nfs-web-1                                        1/1       Running             0          1m
nfs-web-2                                        1/1       Running             0          33s

kubectl get pvc
NAME            STATUS    VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS          AGE
...
www-nfs-web-0   Bound     pvc-cc36b3ce-8b50-11e8-b585-525400db4df7   1Gi        RWO            course-nfs-storage    2m
www-nfs-web-1   Bound     pvc-d38285f9-8b50-11e8-b585-525400db4df7   1Gi        RWO            course-nfs-storage    2m
www-nfs-web-2   Bound     pvc-e348250b-8b50-11e8-b585-525400db4df7   1Gi        RWO            course-nfs-storage    1m
...

kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM                   STORAGECLASS          REASON    AGE
...                                                        1d
pvc-cc36b3ce-8b50-11e8-b585-525400db4df7   1Gi        RWO            Delete           Bound       default/www-nfs-web-0   course-nfs-storage              4m
pvc-d38285f9-8b50-11e8-b585-525400db4df7   1Gi        RWO            Delete           Bound       default/www-nfs-web-1   course-nfs-storage              4m
pvc-e348250b-8b50-11e8-b585-525400db4df7   1Gi        RWO            Delete           Boun


ls /data/k8s/
...
default-www-nfs-web-0-pvc-cc36b3ce-8b50-11e8-b585-525400db4df7
default-www-nfs-web-1-pvc-d38285f9-8b50-11e8-b585-525400db4df7
default-www-nfs-web-2-pvc-e348250b-8b50-11e8-b585-525400db4df7