使用 NFS 作为 Kuberenetes 持久化存储

安装 NFS Server

yum install -y nfs-utils nfs-utils-lib # centos

---- or ----

apt install -y nfs-common nfs-kernel-server   # ubuntu or debain

创建一个目录作为 NFS 共享

sudo mkdir -p /mnt/nfs4/share

cat > /etc/exports
/mnt/nfs4/share clientIP(rw,sync,no_subtree_check)

or 

/mnt/nfs4/share subnetIP/24(rw,sync,no_subtree_check)

exportfs -a

---

安装 Kuberenetes 客户端

需要在每个节点上都安装 nfs 客户端

yum install -y nfs-utils    # centos

--- or ----

apt install -u nfs-common   # ubuntu or debain

需要三个 yaml 文件

1. 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

2. 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'
parameters:
  archiveOnDelete: "false"

3. 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: 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: <nfs server address>   # 这里输入 NFS 服务器地址
            - name: NFS_PATH
              value: /ifs/kubernetes        # nfs share path
      volumes:
        - name: nfs-client-root
          nfs:
            server: <nfs server address>    # 这里输入 NFS 服务器地址
            path: /ifs/kubernetes           # nfs share path

执行 kubectl apply

kubectl create -f deploy/rbac.yaml
kubectl create -f deploy/class.yaml
kubectl create -f deploy/deployment.yaml

---

创建一个测试 NFS 服务的 POD

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-pv-claim
  annotations:
    volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Mi
---
kind: Pod
apiVersion: v1
metadata:
  name: test-pod
spec:
  containers:
  - name: test-pod
    image: redis:5.0.9-buster
    volumeMounts:
      - name: nfs-pvc
        mountPath: "/data"
  volumes:
    - name: nfs-pvc
      persistentVolumeClaim:
        claimName: test-pv-claim