如何在Kubernetes里使用NFS存储

nfs 无法空间限额,相当于有个 provisioner 远程帮忙挂载

1 安装 nfs 客户端#

最好每个节点都安装

yum -y install nfs-utils

1.1 测试#

1
showmount -e 10.1.1.1
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Export list for 10.1.1.1:
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/data/nfs_data *

2 部署驱动#

下载此目录所有文件

2.1 修改配置#

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cat deployment.yaml
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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  name: nfs-client-provisioner
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  labels:
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    app: nfs-client-provisioner
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  namespace: nfs
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spec:
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  replicas: 1
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  strategy:
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    type: Recreate
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  selector:
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    matchLabels:
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      app: nfs-client-provisioner
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  template:
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    metadata:
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      labels:
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        app: nfs-client-provisioner
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    spec:
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      serviceAccountName: nfs-client-provisioner
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      containers:
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        - name: nfs-client-provisioner
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          image: willdockerhub/nfs-subdir-external-provisioner:v4.0.2
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          volumeMounts:
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            - name: nfs-client-root
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              mountPath: /persistentvolumes
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          env:
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            - name: PROVISIONER_NAME
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              value: k8s-sigs.io/nfs-subdir-external-provisioner
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            - name: NFS_SERVER
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              value: 10.1.1.1 # nfs地址
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            - name: NFS_PATH
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              value: /data/nfs_data # nfs目录
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      volumes:
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        - name: nfs-client-root
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          nfs:
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            server: 10.1.1.1 # nfs地址
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            path: /data/nfs_data # nfs目录

1
kubectl apply -f . -n nfs
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kubectl get pod -n nfs
3
NAME                                      READY   STATUS    RESTARTS   AGE
4
nfs-client-provisioner-6fddfdfd9f-7rwh6   1/1     Running   0          6d23h

3 Storageclass#

创建 Storageclass

1
cat sc.yaml
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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  name: nfs-client
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provisioner: k8s-sigs.io/nfs-subdir-external-provisioner
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parameters:
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  archiveOnDelete: "false"
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kubectl apply -f sc.yaml -n nfs

4 验证#

4.1 创建 pvc#

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cat pvc.yaml
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kind: PersistentVolumeClaim
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apiVersion: v1
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metadata:
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  name: test-claim
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spec:
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  storageClassName: nfs-client
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  accessModes:
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    - ReadWriteMany
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  resources:
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    requests:
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      storage: 1Mi
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kubectl apply -f pvc.yaml -n nfs

查看

1
kubectl get pvc -n nfs
2
NAME         STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
3
test-claim   Bound    pvc-8c1a55c4-eb09-4aca-8a2a-9cbbddb12706   1Mi        RWX            nfs-client     6d23h

4.2 创建 pod#

1
cat pod.yaml
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kind: Pod
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apiVersion: v1
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metadata:
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  name: nfs-pod
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  namespace: nfs
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spec:
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  containers:
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  - name: nfs-pod
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    image:  nginx
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    volumeMounts:
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      - name: pvc
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        mountPath: "/mnt"
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  volumes:
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    - name: pvc
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      persistentVolumeClaim:
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        claimName: nfs-pvc
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kubectl apply -f pod.yaml -n nfs

查看

1
kubectl get pod -n nfs
2
NAME                   READY   STATUS    RESTARTS   AGE
3
nfs-pod              1/1     Running   0          16h

5 静态创建#

5.1 创建 pv#

1
apiVersion: v1
2
kind: PersistentVolume
3
metadata:
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  name: nfs-pv    #pv的名字
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spec:
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  accessModes:
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  - ReadWriteMany
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  capacity:
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    storage: 2Mi    #容量大小
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  nfs:
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    path: /data/nfs_data/pvc-test   #该/data/nfs_data/为nfs固定目录，不可变；
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    server: 10.1.1.1          #nfs server地址
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  persistentVolumeReclaimPolicy: Retain #回收策略，默认为Retain，删除pvc后，pv可以继续用。建议手动创建pv都使用该策略。
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  volumeMode: Filesystem

5.2 pvc 绑定 pv#

1
apiVersion: v1
2
kind: PersistentVolumeClaim
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metadata:
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  name: nfs-pvc
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spec:
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  volumeName: nfs-pv
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  accessModes: ["ReadWriteOnce"]
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  resources:
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    requests:
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      storage: 1Gi

5.3 查看#

1
kubectl get pvc -n gfs
2
NAME       STATUS   VOLUME     CAPACITY   ACCESS MODES   STORAGECLASS     AGE
3
nfs-pvc    Bound    nfs-pv     1Gi        RWO                             12m

1 安装 nfs 客户端#

1.1 测试#

2 部署驱动#

2.1 修改配置#

3 Storageclass#

4 验证#

4.1 创建 pvc#

4.2 创建 pod#

5 静态创建#

5.1 创建 pv#

5.2 pvc 绑定 pv#

5.3 查看#

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