k8s之StorageClass(NFS)

实验环境

k8s环境参考： k8s-v1.20.10 二进制部署指导文档

NFS-Subdir-External-Provisioner 简介

NFS-Subdir-External-Provisioner是一个自动配置卷程序，它使用现有的和已配置的 NFS 服务器来支持通过持久卷声明动态配置 Kubernetes 持久卷，PV命名规则如下

PV以 ${namespace}-${pvcName}-${pvName}的命名格式提供（在NFS服务器上）
PV回收的时候以 archieved-${namespace}-${pvcName}-${pvName} 的命名格式（在NFS服务器上）

NFS-Subdir-External-Provisioner此组件是对nfs-client-provisioner 的扩展，nfs-client-provisioner 已经不提供更新，且 nfs-client-provisioner 的 Github 仓库已经迁移到 NFS-Subdir-External-Provisioner的仓库，GitHub地址

NFS服务器配置

所以节点必须安装nfs-utils

# 具体配置过程略，这里仅看下nfs配置
[root@k8s-node-1 k8s-nfs]# cat /etc/exports
/data/k8s-nfs/nfs-provisioner 192.168.0.0/24(rw,no_root_squash)

创建ServiceAccount

[root@k8s-master-1 storageClass]# cat serviceaccount.yaml
apiVersion: v1
kind: ServiceAccount
metadata:name: nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:name: nfs-client-provisioner-runner
rules:- apiGroups: [""]resources: ["nodes"]verbs: ["get", "list", "watch"]- 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: ServiceAccountname: nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
roleRef:kind: ClusterRolename: nfs-client-provisioner-runnerapiGroup: 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 deployednamespace: 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 deployednamespace: default
subjects:- kind: ServiceAccountname: nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
roleRef:kind: Rolename: leader-locking-nfs-client-provisionerapiGroup: rbac.authorization.k8s.io

部署 NFS-Subdir-External-Provisioner

[root@k8s-master-1 storageClass]# cat deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:name: nfs-client-provisionerlabels:app: nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
spec:replicas: 1strategy:type: Recreateselector:matchLabels:app: nfs-client-provisionertemplate:metadata:labels:app: nfs-client-provisionerspec:nodeName: k8s-master-1   #设置在master节点运行tolerations:             #设置容忍master节点污点- key: node-role.kubernetes.io/masteroperator: Equalvalue: "true"serviceAccountName: nfs-client-provisionercontainers:- name: nfs-client-provisionerimage: registry.cn-hangzhou.aliyuncs.com/jiayu-kubernetes/nfs-subdir-external-provisioner:v4.0.0imagePullPolicy: IfNotPresentvolumeMounts:- name: nfs-client-rootmountPath: /persistentvolumesenv:- name: PROVISIONER_NAMEvalue: k8s/nfs-subdir-external-provisioner- name: NFS_SERVERvalue: 192.168.0.11- name: NFS_PATHvalue: /data/k8s-nfs/nfs-provisionervolumes:- name: nfs-client-rootnfs:server: 192.168.0.11  # NFS SERVER_IPpath: /data/k8s-nfs/nfs-provisioner# 查看pods
[root@k8s-master-1 storageClass]# kubectl get pods
NAME                                      READY   STATUS    RESTARTS   AGE
nfs-client-provisioner-67d8f9ffff-vfvgd   1/1     Running   0          2m56s

创建NFS StorageClass

[root@k8s-master-1 storageClass]# cat storage.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:name: managed-nfs-storageannotations:storageclass.kubernetes.io/is-default-class: "false"  # 是否设置为默认的storageclass
provisioner: k8s/nfs-subdir-external-provisioner # or choose another name, must match deployment's env PROVISIONER_NAME'
allowVolumeExpansion: true
parameters:archiveOnDelete: "false" # 设置为"false"时删除PVC不会保留数据,"true"则保留数据

# 查看storageclass
[root@k8s-master-1 storageClass]# kubectl get storageclass
NAME                  PROVISIONER                           RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
managed-nfs-storage   k8s/nfs-subdir-external-provisioner   Delete          Immediate           true                   19m

创建PVC

[root@k8s-master-1 storageClass]# cat pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:name: nfs-claim
spec:storageClassName: managed-nfs-storageaccessModes: ["ReadWriteMany","ReadOnlyMany"]resources:requests:storage: 100Mi

# 查看pvc
[root@k8s-master-1 storageClass]# kubectl get pvc
NAME        STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS          AGE
nfs-claim   Bound    pvc-0258363b-6549-481e-9a6e-5dd4e1eca1ea   100Mi      ROX,RWX        managed-nfs-storage   3s
[root@k8s-master-1 storageClass]# kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM               STORAGECLASS          REASON   AGE
pvc-0258363b-6549-481e-9a6e-5dd4e1eca1ea   100Mi      ROX,RWX        Delete           Bound    default/nfs-claim   managed-nfs-storage            12s# k8s-node-1节点查看存储
[root@k8s-node-1 nfs-provisioner]# tree default-nfs-claim-pvc-0258363b-6549-481e-9a6e-5dd4e1eca1ea/
default-nfs-claim-pvc-0258363b-6549-481e-9a6e-5dd4e1eca1ea/

创建Pod并绑定PV

[root@k8s-master-1 storageClass]# cat busybox.yaml
apiVersion: v1
kind: Pod
metadata:name: test-pod
spec:containers:- name: test-podimage: busybox:1.28imagePullPolicy: IfNotPresentcommand:- "/bin/sh"args:- "-c"- "sleep 3600"volumeMounts:- name: nfs-pvcmountPath: "/mnt/busybox"restartPolicy: "Never"volumes:- name: nfs-pvcpersistentVolumeClaim:claimName: nfs-claim

[root@k8s-master-1 storageClass]# kubectl exec -it test-pod -- ls /mnt/busybox/
[root@k8s-master-1 storageClass]# kubectl exec -it test-pod -- touch /mnt/busybox/test.txt#k8s-node-1查看
[root@k8s-node-1 default-nfs-claim-pvc-bf5f8a3a-92ee-4ea4-baf1-156cdb87230e]# pwd
/data/k8s-nfs/nfs-provisioner/default-nfs-claim-pvc-bf5f8a3a-92ee-4ea4-baf1-156cdb87230e
[root@k8s-node-1 default-nfs-claim-pvc-bf5f8a3a-92ee-4ea4-baf1-156cdb87230e]# ls
test.txt

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k8s之StorageClass(NFS)

k8s之StorageClass(NFS)

实验环境

NFS-Subdir-External-Provisioner 简介

NFS服务器配置

创建ServiceAccount

部署 NFS-Subdir-External-Provisioner

创建NFS StorageClass

创建PVC

创建Pod并绑定PV

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