K8S 部署nfs动态存储类 StorageClass

StorageClass

会自动创建pv，pvc可以指定sc的名称。

1.k8s组件原生并不支持NFS动态存储

https://kubernetes.io/docs/concepts/storage/storage-classes/#provisioner

2.修改api-server属性，添加"--feature-gates=RemoveSelfLink"参数。

vim /etc/kubernetes/manifests/kube-apiserver.yaml

...
spec:
  containers:
  - command:
    - kube-apiserver
    - --service-node-port-range=3000-50000
    - --feature-gates=RemoveSelfLink=false
	...

3.修改配置文件

cat class.yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: managed-nfs-storage
# provisioner: fuseim.pri/ifs # or choose another name, must match deployment's env PROVISIONER_NAME'
provisioner: baimei/linux86
parameters:
  # archiveOnDelete: "false"
  archiveOnDelete: "true"

cat deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-client-provisioner
  labels:
    app: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app: nfs-client-provisioner
  template:
    metadata:
      labels:
        app: nfs-client-provisioner
    spec:
      serviceAccountName: nfs-client-provisioner
      containers:
        - name: nfs-client-provisioner
          image: harbor.baimei.com/baimei-tools/nfs-client-provisioner:latest
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              # value: fuseim.pri/ifs
              value: baimei/linux86
            - name: NFS_SERVER
              value: 10.0.0.231
            - name: NFS_PATH
              value: /baimei/data/kubernetes/sc
      volumes:
        - name: nfs-client-root
          nfs:
            server: 10.0.0.231
            # path: /ifs/kubernetes
            path: /baimei/data/kubernetes/sc

cat rbac.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
---
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: ["create", "update", "patch"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: run-nfs-client-provisioner
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    # replace with namespace where provisioner is deployed
    namespace: default
roleRef:
  kind: ClusterRole
  name: nfs-client-provisioner-runner
  apiGroup: rbac.authorization.k8s.io
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: leader-locking-nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
rules:
  - apiGroups: [""]
    resources: ["endpoints"]
    verbs: ["get", "list", "watch", "create", "update", "patch"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: leader-locking-nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    # replace with namespace where provisioner is deployed
    namespace: default
roleRef:
  kind: Role
  name: leader-locking-nfs-client-provisioner
  apiGroup: rbac.authorization.k8s.io

[root@master231 storageclasses]#

cat test-claim.yaml

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

cat test-pod.yaml

kind: Pod
apiVersion: v1
metadata:
  name: test-pod
spec:
  containers:
  - name: test-pod
    image: harbor.baimei.com/baimei-linux/alpine:latest
    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-claim

4.nfs服务器端创建sc需要共享路径

mkdir -pv /baimei/data/kubernetes/sc

5.创建资源

kubectl apply -f .

6.查看是否部署成功

kubectl get pods

温馨提示:

生产环境建议设置回收策略为保留（Retain）。

cat > class.yaml  <<'EOF'
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: managed-nfs-storage
# provisioner: fuseim.pri/ifs # or choose another name, must match deployment's env PROVISIONER_NAME'
provisioner: baimei/linux
parameters:
  # 注意哈，仅对"reclaimPolicy: Delete"时生效，如果回收策略是"reclaimPolicy: Retain"，则无视此参数!
  # 如果设置为false，删除数据后，不会在存储卷路径创建"archived-*"前缀的目录哟!
  # archiveOnDelete: "false"
  # 如果设置为true，删除数据后，会在存储卷路径创建"archived-*"前缀的目录哟
  archiveOnDelete: "true"
# 声明PV回收策略，默认值为Delete
reclaimPolicy: Retain
EOF

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