Kubernetes怎麼進行NFS動態儲存遷移

minseo發表於2024-09-10
NFS
  1. 環境檢視
    系統環境
# cat /etc/redhat-release 
CentOS Linux release 7.9.2009 (Core)
# uname -a
Linux CentOS7K8SMaster01063 3.10.0-1160.108.1.el7.x86_64 #1 SMP Thu Jan 25 16:17:31 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

軟體環境

# kubectl version
Client Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.4", GitCommit:"c27b913fddd1a6c480c229191a087698aa92f0b1", GitTreeState:"clean", BuildDate:"2019-02-28T13:37:52Z", GoVersion:"go1.11.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.4", GitCommit:"c27b913fddd1a6c480c229191a087698aa92f0b1", GitTreeState:"clean", BuildDate:"2019-02-28T13:30:26Z", GoVersion:"go1.11.5", Compiler:"gc", Platform:"linux/amd64"}

  1. 需求
    把一臺NFS動態儲存遷移至另外一臺伺服器
    原始主機IP地址和資料 192.168.3.63 /ifs/kubernetes/
    目標主機IP地址和資料 192.168.3.64 /ifs/kubernetes/

  2. 遷移步驟
    前提：已經安裝好NFS並配置和原始配置一致
    遷移資料

/usr/bin/rsync -avzP -e "ssh -p 22" /ifs/kubernetes/ root@192.168.3.64:/ifs/kubernetes/

修改動態儲存NFS配置檔案

# kubectl edit deployment nfs-client-provisioner

image
測試yaml檔案
建立pvc

# cat test-claim.yaml 
apiVersion: v1
#建立pvc名稱為test-claim
kind: PersistentVolumeClaim
metadata:
  name: test-claim
spec:
  #ReadWriteMany可讀寫並且可以被多個節點使用
  #ReadWriteOnce只能被一個節點使用
  #ReadOnlyMany可以被多個節點讀取
  accessModes:
    - ReadWriteMany
  #對應的storageClass名
  storageClassName: "managed-nfs-storage"
  #定義動態分配儲存空間大小為10M
  resources:
    requests:
      storage: 10Mi

建立pod該pod在pvc建立一個檔案SUCCESS

# cat test-pod.yaml 
kind: Pod
apiVersion: v1
metadata:
  name: test-pod
spec:
  containers:
  - name: test-pod
    #image: busybox:1.24
    image: busybox
    command:
      - "/bin/sh"
    args:
      - "-c"
      - "touch /mnt/SUCCESS && exit 0 || exit 1"
    volumeMounts:
      - name: nfs-pvc
        mountPath: "/mnt"
  restartPolicy: "Never"
  volumes:
    - name: nfs-pvc
      persistentVolumeClaim:
        claimName: test-claim

建立另外一個pod掛載該檔案至/mnt

# cat test-pod2.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: test-pod2
spec:
  containers:
  - name: nginx
    image: nginx
    volumeMounts:
      - name: nfs-pvc
        mountPath: "/mnt"
  volumes:
    - name: nfs-pvc
      persistentVolumeClaim:
        claimName: test-claim

建立成功在新的伺服器資料夾下可以看到建立對應的目錄

# ls -lah /ifs/kubernetes/

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