storageclass学习

# storageclass

# 介绍

StorageClass 为管理员提供了描述存储 "类" 的方法。不同的类型可能会映射到不同的服务质量等级或备份策略，或是由集群管理员制定的任意策略。 Kubernetes 本身并不清楚各种类代表的什么。这个类的概念在其他存储系统中有时被称为 "配置文件"。

# StorageClass 资源

每个 StorageClass 都包含 provisioner、parameters 和 reclaimPolicy 字段，这些字段会在 StorageClass 需要动态分配 PersistentVolume 时会使用到。

# 创建基于nfs的第三方制备器

由于NFS 没有内部制备器，但可以使用外部制备器。也有第三方存储供应商提供自己的外部制备器。

自定义制备器

前题是已经安装nfs服务

vim nfs-client.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-client-provisioner

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: nfs-client-provisioner-clusterrole
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: ["list", "watch", "create", "update", "patch"]
  - apiGroups: [""]
    resources: ["endpoints"]
    verbs: ["create", "delete", "get", "list", "watch", "patch", "update"]

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: nfs-client-provisioner-clusterrolebinding
subjects:
- kind: ServiceAccount
  name: nfs-client-provisioner
  namespace: default
roleRef:
  kind: ClusterRole
  name: nfs-client-provisioner-clusterrole
  apiGroup: rbac.authorization.k8s.io
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: nfs-client-provisioner
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nfs-client-provisioner
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: nfs-client-provisioner
    spec:
      serviceAccountName: nfs-client-provisioner
      containers:
        - name: nfs-client-provisioner
          image: quay.io/vbouchaud/nfs-client-provisioner:latest
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: fuseim.pri/ifs
            - name: NFS_SERVER
              value: node0
            - name: NFS_PATH
              value: /home/nfs/data
      volumes:
        - name: nfs-client-root
          nfs:
            server: node0  ## nfs服务器host
            path: /home/nfs/data   ## nfs数据目录

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kubectl apply -f nfs-client.yaml

创建storageclass

vim nfs-client-storageclass.yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nfs-client-storageclass
provisioner: fuseim.pri/ifs ## 和上面自定义制备器的名称变量值一致

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测试pvc

vim test-nfs-pvc.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-nfs-pvc2
  annotations:
    volume.beta.kubernetes.io/storage-class: "nfs-client-storageclass"
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Gi

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测试pod

vim test-pod.yaml

apiVersion: v1
kind: Pod
metadata:
  name: test-storageclass-pod
spec:
  containers:
  - name: busybox
    image: busybox:latest
    imagePullPolicy: IfNotPresent
    command:
    - "/bin/sh"
    - "-c"
    args:
    - "sleep 3600"
    volumeMounts:
    - name: nfs-pvc
      mountPath: /mnt
  restartPolicy: Never
  volumes:
  - name: nfs-pvc
    persistentVolumeClaim:
      claimName: test-nfs-pvc2

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进入pod输出文件

kubectl exec -it pod_name sh
cd /mnt/
echo "test" > test.txt

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nfs服务器数据目录自动创建pv挂载的目录，里面有test.txt。

helm 安装：https://artifacthub.io/packages/helm/nfs-subdir-external-provisioner/nfs-subdir-external-provisioner

# 参考

https://zhuanlan.zhihu.com/p/104555373

https://kubernetes.io/zh/docs/concepts/storage/storage-classes/

https://hub.docker.com/r/vbouchaud/nfs-client-provisioner

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#K8S

上次更新: 2024/09/30, 01:34:11

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