#我的新年Flag#storageClass

Posted 2023-02-15

概念

StorageClass 可以动态生成一个存储卷PV 供K8s pvc 使用，它的作用是创建PV模板

创建NFS共享目录

[root@k8smaster5 ~]# mkdir /data/storageClass
[root@k8smaster5 ~]# vim /etc/exports
[root@k8smaster5 ~]# cat /etc/exports
/data/volumes *(rw,no_root_squash)
/data/volume_test/v1 *(rw,no_root_squash)
/data/volume_test/v2 *(rw,no_root_squash)
/data/volume_test/v3 *(rw,no_root_squash)
/data/volume_test/v4 *(rw,no_root_squash)
/data/volume_test/v5 *(rw,no_root_squash)
/data/volume_test/v6 *(rw,no_root_squash)
/data/volume_test/v7 *(rw,no_root_squash)
/data/volume_test/v8 *(rw,no_root_squash)
/data/volume_test/v9 *(rw,no_root_squash)
/data/volume_test/v10 *(rw,no_root_squash)
/data/storageClass *(rw,no_root_squash)

导入NFS新增共享目录

[root@k8smaster5 ~]# exportfs -arv
exporting *:/data/storageClass
exporting *:/data/volume_test/v10
exporting *:/data/volume_test/v9
exporting *:/data/volume_test/v8
exporting *:/data/volume_test/v7
exporting *:/data/volume_test/v6
exporting *:/data/volume_test/v5
exporting *:/data/volume_test/v4
exporting *:/data/volume_test/v3
exporting *:/data/volume_test/v2
exporting *:/data/volume_test/v1
exporting *:/data/volumes

导入镜像

[root@k8snode4 ~]# ctr -n=k8s.io images import nfs-subdir-external-provisioner.tar.gz

创建SA

[root@k8smaster4 storage]# cat serviceaccount.yaml 
apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-provisioner

查看SA

[root@k8smaster4 storage]# kubectl get sa

绑定SA

[root@k8smaster4 storage]# kubectl create clusterrolebinding nfs-provisioner-clusterrolebinding --clusterrole=cluster-admin --serviceaccount=default:nfs-provisioner
clusterrolebinding.rbac.authorization.k8s.io/nfs-provisioner-clusterrolebinding created

创建存储类(storageClass)

[root@k8smaster4 storage]# cat storageclass.yaml 
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nfs
provisioner: example.com/nfs

查看执行结果

查看存储类创建结果

[root@k8smaster4 storage]# kubectl get storageclass
NAME   PROVISIONER       RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
nfs    example.com/nfs   Delete          Immediate           false                  15s

创建PVC，关联存储类

[root@k8smaster4 storage]# cat pvc.yaml 
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-claim
spec:
  accessModes: ["ReadWriteMany"]
  resources:
    requests:
      storage: 1Gi
  storageClassName: nfs

查看PVC创建结果(生成PV)

[root@k8smaster4 storage]# kubectl get pvc
[root@k8smaster4 storage]# kubectl get pvc
NAME         STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
test-claim   Bound    pvc-b709529d-7015-4eb0-ace8-077ccd94779d   1Gi        RWX            nfs            6s

创建控制器Pod

[root@k8smaster4 storage]# cat nfs-deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-provisioner
spec:
  selector:
    matchLabels:
      app: nfs-provisioner
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: nfs-provisioner
    spec:
      serviceAccount: nfs-provisioner
      containers:
      - name: nfs-provisioner
        image: registry.cn-beijing.aliyuncs.com/mydlq/nfs-subdir-external-provisioner:v4.0.0
        imagePullPolicy: IfNotPresent
        volumeMounts:
        - name: nfs-client-root
          mountPath: /persistentvolumes
        env:
        - name: PROVISIONER_NAME
          value: example.com/nfs
        - name: NFS_SERVER
          value: 192.168.0.220
        - name: NFS_PATH
          value: /data/storageClass/
      volumes:
      - name: nfs-client-root
        nfs:
          server: 192.168.0.220
          path: /data/storageClass/

查看执行结果

[root@k8smaster4 storage]# kubectl get deploy

验证内容同步Pod

[root@k8smaster4 storage]# cat testclass.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: test-storageclass
spec:
  containers:
  - name: test-container
    image: docker.io/library/nginx
    imagePullPolicy: IfNotPresent
    volumeMounts:
    - name: nfs-pvc
      mountPath: /usr/share/nginx/html
  volumes:
  - name: nfs-pvc
    persistentVolumeClaim:
      claimName: test-claim