K8S結合NFS配置持久化存儲PV和PVC

1.找個機器搭建NFS

#master節點安裝nfs
yum -y install nfs-utils

#創建nfs目錄
mkdir -p /nfs/data/

#修改權限
chmod -R 777 /nfs/data

#編輯export文件
vim /etc/exports
/nfs/data *(rw,no_root_squash,sync)

#配置生效
exportfs -r
#查看生效
exportfs

#啓動rpcbind、nfs服務
systemctl restart rpcbind && systemctl enable rpcbind
systemctl restart nfs && systemctl enable nfs

#查看 RPC 服務的註冊狀況
rpcinfo -p localhost

#showmount測試
showmount -e 192.168.92.56

#所有node節點安裝客戶端
yum -y install nfs-utils
systemctl start nfs && systemctl enable nfs

------------
#創建pv卷對應的目錄
mkdir -p /nfs/data/pv001
mkdir -p /nfs/data/pv002

#配置exportrs
vim /etc/exports
/nfs/data *(rw,no_root_squash,sync)
/nfs/data/pv001 *(rw,no_root_squash,sync)
/nfs/data/pv002 *(rw,no_root_squash,sync)

#配置生效
exportfs -r
#重啓rpcbind、nfs服務
systemctl restart rpcbind && systemctl restart nfs

2.創建PV

[centos@k8s-master ~]$ vim nfs-pv001.yaml 
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-pv001
  labels:
    pv: nfs-pv001
spec:
  capacity:
    storage: 100Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Recycle
  storageClassName: nfs
  nfs:
    path: /nfs/data/pv001
    server: 172.23.0.12



kubectl apply -f nfs-pv001.yaml 

3.創建PVC

[centos@k8s-master ~]$ vim nfs-pvc001.yaml               
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-pvc001
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 100Gi
  storageClassName: nfs
  selector:
    matchLabels:
      pv: nfs-pv001



kubectl apply -f nfs-pvc001.yaml
kubectl get pv
kubectl get pvc
ok gogogogo...

4.創建或者修改POD應用部署

{
  "kind": "Deployment",
  "apiVersion": "extensions/v1beta1",
  "metadata": {
    "name": "hs-jd-zhineng",
    "namespace": "default",
    "selfLink": "/apis/extensions/v1beta1/namespaces/default/deployments/hs-jd-zhineng",
    "uid": "05339eec-4348-4447-bcd2-2d7381731212",
    "resourceVersion": "13608547",
    "generation": 6,
    "creationTimestamp": "2019-11-04T04:33:44Z",
    "labels": {
      "k8s-app": "hs-jd-zhineng"
    },
    "annotations": {
      "deployment.kubernetes.io/revision": "6"
    }
  },
  "spec": {
    "replicas": 1,
    "selector": {
      "matchLabels": {
        "k8s-app": "hs-jd-zhineng"
      }
    },
    "template": {
      "metadata": {
        "name": "hs-jd-zhineng",
        "creationTimestamp": null,
        "labels": {
          "k8s-app": "hs-jd-zhineng"
        }
      },
      "spec": {
        "volumes": [
          {
            "name": "nfs-pv001",
            "persistentVolumeClaim": {
              "claimName": "nfs-pvc001"
            }
          }
        ],
        "containers": [
          {
            "name": "hs-jd-zhineng",
            "image": "registry.cn-hangzhou.aliyuncs.com/xxxxxxxxxxx",
            "resources": {},
            "volumeMounts": [
              {
                "name": "nfs-pv001",
                "mountPath": "/var/lib/odoo"  /****這裏是程序路徑
              }
            ],
            "terminationMessagePath": "/dev/termination-log",
            "terminationMessagePolicy": "File",
            "imagePullPolicy": "Always",
            "securityContext": {
              "privileged": false
            }
          }
        ],
        "restartPolicy": "Always",
        "terminationGracePeriodSeconds": 30,
        "dnsPolicy": "ClusterFirst",
        "securityContext": {},
        "imagePullSecrets": [
          {
            "name": "s"
          }
        ],
        "schedulerName": "default-scheduler"
      }
    },
    "strategy": {
      "type": "RollingUpdate",
      "rollingUpdate": {
        "maxUnavailable": "25%",
        "maxSurge": "25%"
      }
    },
    "revisionHistoryLimit": 10,
    "progressDeadlineSeconds": 600
  },
  "status": {
    "observedGeneration": 6,
    "replicas": 1,
    "updatedReplicas": 1,
    "readyReplicas": 1,
    "availableReplicas": 1,
    "conditions": [
      ****
    ]
  }
}

5.在應用內上傳圖片，然後刪除容器組測試，看看新創建的pod能不能調用之前的圖片。