NFS

安装NFS Server

yum install nfs-utils rpcbind

编辑/etc/exports

/nfs *(insecure,rw,sync,no_root_squash,no_all_squash)

创建nfs目录

mkdir -p /nfs

启动服务

systemctl enable nfs-server rpcbind
systemctl start nfs-server rpcbind

添加DNS域名服务器

echo "nameserver 192.168.1.21" >>/etc/resolv.conf

测试访问NFS

$ showmount -e rke02.nfs.com
Export list for rke02.nfs.com:
/nfs *

k8s

编辑coredns configmap添加dns解析

.:53 {
  ......
} # STUBDOMAINS - Rancher specific change
k8s.nfs.com:53 {
    errors
    cache 30
    forward . 192.168.1.21 {
    prefer_udp
    }
}

安装nfs客户端

yum install nfs-utils rpcbind

下载代码

git clone https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner.git

rbac授权

cd nfs-subdir-external-provisioner/deploy/
kubectl apply -f rbac.yaml

创建StorageClass

编辑class.yaml修改metata.name为nfs-provisioner，新增allowVolumeExpansion: true；支持pv扩容和设置默认storageclass；编辑provisioner；

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nfs-client
  annotations:
    storageclass.beta.kubernetes.io/is-default-class: 'true'
provisioner: nfs-client-provisioner # or choose another name, must match deployment's env PROVISIONER_NAME'
parameters:
  archiveOnDelete: "false"
allowVolumeExpansion: true

执行以下命令创建storageclass

kubectl apply -f class.yaml

部署nfs-client-provisioner
编辑deployment.yaml，修改NFS_SERVER、NFS_PATH、PROVISIONER_NAME，PROVISIONER_NAME需要和storageclass中的provisioner保持一致

spec:
    spec:
      serviceAccountName: nfs-client-provisioner
      containers:
        - name: nfs-client-provisioner
          image: registry.k8s.io/sig-storage/nfs-subdir-external-provisioner:v4.0.2
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: nfs-client-provisioner
            - name: NFS_SERVER
              value: cluster.nfs.com
            - name: NFS_PATH
              value: /nfs
      volumes:
        - name: nfs-client-root
          nfs:
            server: cluster.nfs.com
            path: /nfs

执行以下命令部署NFS Client

kubectl apply -f deployment.yaml

查看容器状态

$ kubectl get pod
NAME                                      READY   STATUS    RESTARTS   AGE
nfs-client-provisioner-66cb44d4f5-fdh6v   1/1     Running   0          2m48s

创建PVC

kubectl apply -f test-claim.yaml

创建pod

编辑test-pod.yaml

kind: Pod
apiVersion: v1
metadata:
  name: test-pod
spec:
  containers:
  - name: test-pod
    image: 192.168.1.21:81/library/busybox:latest
    command: ['tail']
    args: ['-f', '/dev/null']
    volumeMounts:
      - name: nfs-pvc
        mountPath: "/mnt"
  restartPolicy: "Never"
  volumes:
    - name: nfs-pvc
      persistentVolumeClaim:
        claimName: test-claim

部署pod

kubectl apply -f test-po.yaml

验证NFS挂载

$ kubectl exec -it test-pod -- sh
/ #
/ # df -h|grep nfs
192.168.229.133:/nfs/default-test-claim-pvc-7a2497e5-f93c-4deb-b2b0-71451ec09647
/ #