Kubernetes 之 Nginx 動靜態 PV 持久存儲下篇

接上篇 Kubernetes 中部署 NFS Provisioner 爲 NFS 提供動態分配卷（上篇）請添加鏈接描述

一、nginx 使用 nfs 靜態 PV

1、靜態 nfs-static-nginx-rc.yaml

##清理資源
kubectl delete -f nfs-static-nginx-rc.yaml -n test

cat >nfs-static-nginx-rc.yaml<<\EOF
##創建namespace
---
apiVersion: v1
kind: Namespace
metadata:
   name: test
   labels:
     name: test
##創建nfs-pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-pv
  labels:
    pv: nfs-pv
spec:
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs  # 注意這裏使用nfs的storageClassName，如果沒改k8s的默認storageClassName的話，這裏可以省略
  nfs:
    path: /data/nfs/nginx/
    server: 10.198.1.155
##創建nfs-pvc
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nfs-pvc
  namespace: test
  labels:
    pvc: nfs-pvc
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Gi
  storageClassName: nfs
  selector:
    matchLabels:
      pv: nfs-pv
##部署應用nginx
---
apiVersion: v1
kind: ReplicationController
metadata:
  name: nginx-test
  namespace: test
  labels:
    name: nginx-test
spec:
  replicas: 2
  selector:
    name: nginx-test
  template:
    metadata:
      labels:
       name: nginx-test
    spec:
      containers:
      - name: nginx-test
        image: docker.io/nginx
        volumeMounts:
        - mountPath: /usr/share/nginx/html
          name: nginx-data
        ports:
        - containerPort: 80
      volumes:
      - name: nginx-data
        persistentVolumeClaim:
          claimName: nfs-pvc
##創建service
---
apiVersion: v1
kind: Service
metadata:
  namespace: test
  name: nginx-test
  labels:
    name: nginx-test
spec:
  type: NodePort
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
    name: http
    nodePort: 30080
  selector:
    name: nginx-test
EOF

##創建資源
kubectl apply -f nfs-static-nginx-rc.yaml -n test

##查看pv資源
kubectl get pv -n test --show-labels

##查看pvc資源
kubectl get pvc -n test --show-labels

##查看pod
$ kubectl get pods -n test
NAME               READY   STATUS    RESTARTS   AGE
nginx-test-r4n2j   1/1     Running   0          54s
nginx-test-zstf5   1/1     Running   0          54s

#可以看到，nginx應用已經部署成功。
#nginx應用的數據目錄是使用的nfs共享存儲，我們在nfs共享的目錄里加入index.html文件，然後再訪問nginx-service暴露的端口
#切換到到nfs-server服務器上

echo "Test NFS Share discovery with nfs-static-nginx-rc" > /data/nfs/nginx/index.html

#在瀏覽器上訪問kubernetes主節點的 http://master:30080，就能訪問到這個頁面內容了

2、靜態 nfs-static-nginx-deployment.yaml

##清理資源
kubectl delete -f nfs-static-nginx-deployment.yaml -n test

cat >nfs-static-nginx-deployment.yaml<<\EOF
##創建namespace
---
apiVersion: v1
kind: Namespace
metadata:
   name: test
   labels:
     name: test
##創建nfs-pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-pv
  labels:
    pv: nfs-pv
spec:
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs  # 注意這裏使用nfs的storageClassName，如果沒改k8s的默認storageClassName的話，這裏可以省略
  nfs:
    path: /data/nfs/nginx/
    server: 10.198.1.155
##創建nfs-pvc
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nfs-pvc
  namespace: test
  labels:
    pvc: nfs-pvc
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Gi
  storageClassName: nfs
  selector:
    matchLabels:
      pv: nfs-pv
##部署應用nginx
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: test
  labels:
    name: nginx-test
spec:
  replicas: 2
  selector:
    matchLabels:
      name: nginx-test
  template:
    metadata:
      labels:
       name: nginx-test
    spec:
      containers:
      - name: nginx-test
        image: docker.io/nginx
        volumeMounts:
        - mountPath: /usr/share/nginx/html
          name: nginx-data
        ports:
        - containerPort: 80
      volumes:
      - name: nginx-data
        persistentVolumeClaim:
          claimName: nfs-pvc
##創建service
---
apiVersion: v1
kind: Service
metadata:
  namespace: test
  name: nginx-test
  labels:
    name: nginx-test
spec:
  type: NodePort
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
    name: http
    nodePort: 30080
  selector:
    name: nginx-test
EOF

##創建資源
kubectl apply -f nfs-static-nginx-deployment.yaml -n test

##查看pv資源
kubectl get pv -n test --show-labels

##查看pvc資源
kubectl get pvc -n test --show-labels

##查看pod
$ kubectl get pods -n test
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-64d6f78cdf-8bw8t   1/1     Running   0          55s
nginx-deployment-64d6f78cdf-n5n4q   1/1     Running   0          55s

#可以看到，nginx應用已經部署成功。
#nginx應用的數據目錄是使用的nfs共享存儲，我們在nfs共享的目錄里加入index.html文件，然後再訪問nginx-service暴露的端口
#切換到到nfs-server服務器上

echo "Test NFS Share discovery with nfs-static-nginx-deployment" > /data/nfs/nginx/index.html

#在瀏覽器上訪問kubernetes主節點的 http://master:30080，就能訪問到這個頁面內容了

3、nginx 多目錄掛載

PV 和 PVC 是一一對應關係，當有 PV 被某個 PVC 所佔用時，會顯示 banding，其它 PVC 不能再使用綁定過的 PV。
PVC 一旦綁定 PV，就相當於是一個存儲卷，此時 PVC 可以被多個 Pod 所使用。（PVC支不支持被多個 Pod 訪問，取決於訪問模型 accessMode 的定義）。
PVC 若沒有找到合適的 PV 時，則會處於 pending 狀態。
PV 是屬於集羣級別的，不能定義在名稱空間中。
PVC 時屬於名稱空間級別的。

##清理資源
kubectl delete -f nfs-static-nginx-dp-many.yaml -n test

cat >nfs-static-nginx-dp-many.yaml<<\EOF
##創建namespace
---
apiVersion: v1
kind: Namespace
metadata:
   name: test
   labels:
     name: test
##創建nginx-data-pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nginx-data-pv
  labels:
    pv: nginx-data-pv
spec:
  capacity:
    storage: 50Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs  # 注意這裏使用nfs的storageClassName，如果沒改k8s的默認storageClassName的話，這裏可以省略
  nfs:
    path: /data/nfs/nginx/
    server: 10.198.1.155
##創建nginx-etc-pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nginx-etc-pv
  labels:
    pv: nginx-etc-pv
spec:
  capacity:
    storage: 50Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs  # 注意這裏使用nfs的storageClassName，如果沒改k8s的默認storageClassName的話，這裏可以省略
  nfs:
    path: /data/nfs/nginx/
    server: 10.198.1.155
##創建pvc名字爲nfs-nginx-data,存放數據
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nfs-nginx-data
  namespace: test
  labels:
    pvc: nfs-nginx-data
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 50Gi
  storageClassName: nfs
  selector:
    matchLabels:
      pv: nginx-data-pv
##創建pvc名字爲nfs-nginx-etc,存放配置文件
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nfs-nginx-etc
  namespace: test
  labels:
    pvc: nfs-nginx-etc
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 50Gi
  storageClassName: nfs
  selector:
    matchLabels:
      pv: nginx-etc-pv
##部署應用nginx
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: test
  labels:
    name: nginx-test
spec:
  replicas: 2
  selector:
    matchLabels:
      name: nginx-test
  template:
    metadata:
      labels:
       name: nginx-test
    spec:
      containers:
      - name: nginx-test
        image: docker.io/nginx
        volumeMounts:
        - mountPath: /usr/share/nginx/html
          name: nginx-data
        # - mountPath: /etc/nginx   #--這裏需要注意，如果是這麼掛載，那麼需要事先現在/data/nfs/nginx/目錄下把nginx的完整配置提前拷貝好
        #   name: nginx-etc
        ports:
        - containerPort: 80
      volumes:
      - name: nginx-data
        persistentVolumeClaim:
          claimName: nfs-nginx-data
      # - name: nginx-etc
      #   persistentVolumeClaim:
      #     claimName: nfs-nginx-etc
##創建service
---
apiVersion: v1
kind: Service
metadata:
  namespace: test
  name: nginx-test
  labels:
    name: nginx-test
spec:
  type: NodePort
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
    name: http
    nodePort: 30080
  selector:
    name: nginx-test
EOF

##創建資源
kubectl apply -f nfs-static-nginx-dp-many.yaml -n test

##查看pv資源
kubectl get pv -n test --show-labels

##查看pvc資源
kubectl get pvc -n test --show-labels

##查看pod
$ kubectl get pods -n test
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-64d6f78cdf-8bw8t   1/1     Running   0          55s
nginx-deployment-64d6f78cdf-n5n4q   1/1     Running   0          55s

##進入容器
kubectl exec -it nginx-deployment-f687cdf47-xncj8 -n test /bin/bash

#可以看到，nginx應用已經部署成功。
#nginx應用的數據目錄是使用的nfs共享存儲，我們在nfs共享的目錄里加入index.html文件，然後再訪問nginx-service暴露的端口
#切換到到nfs-server服務器上

echo "Test NFS Share discovery with nfs-static-nginx-dp-many" > /data/nfs/nginx/index.html

#在瀏覽器上訪問kubernetes主節點的 http://master:30080，就能訪問到這個頁面內容了

4、參數 namespace

##清理資源
export NAMESPACE="mos-namespace"

kubectl delete -f nfs-static-nginx-dp-many.yaml -n ${NAMESPACE}

cat >nfs-static-nginx-dp-many.yaml<<-EOF
##創建namespace
---
apiVersion: v1
kind: Namespace
metadata:
   name: ${NAMESPACE}
   labels:
     name: ${NAMESPACE}
##創建nginx-data-pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nginx-data-pv
  labels:
    pv: nginx-data-pv
spec:
  capacity:
    storage: 50Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs  # 注意這裏使用nfs的storageClassName，如果沒改k8s的默認storageClassName的話，這裏可以省略
  nfs:
    path: /data/nfs/nginx/
    server: 10.198.1.155
##創建nginx-log-pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nginx-log-pv
  labels:
    pv: nginx-log-pv
spec:
  capacity:
    storage: 50Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs  # 注意這裏使用nfs的storageClassName，如果沒改k8s的默認storageClassName的話，這裏可以省略
  nfs:
    path: /data/nfs/nginx/
    server: 10.198.1.155
##創建pvc名字爲nfs-nginx-data,存放數據
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nfs-nginx-data
  labels:
    pvc: nfs-nginx-data
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 50Gi
  storageClassName: nfs
  selector:
    matchLabels:
      pv: nginx-data-pv
##創建pvc名字爲nfs-nginx-log,存放日誌文件
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nfs-nginx-log
  labels:
    pvc: nfs-nginx-log
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 50Gi
  storageClassName: nfs
  selector:
    matchLabels:
      pv: nginx-log-pv
##部署應用nginx
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    name: nginx-test
spec:
  replicas: 2
  selector:
    matchLabels:
      name: nginx-test
  template:
    metadata:
      labels:
       name: nginx-test
    spec:
      containers:
      - name: nginx-test
        image: docker.io/nginx
        volumeMounts:
        - mountPath: /usr/share/nginx/html
          name: nginx-data
        - mountPath: /var/log/nginx
          name: nginx-log
        ports:
        - containerPort: 80
      volumes:
      - name: nginx-data
        persistentVolumeClaim:
          claimName: nfs-nginx-data
      - name: nginx-log
        persistentVolumeClaim:
          claimName: nfs-nginx-log
##創建service
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-test
  labels:
    name: nginx-test
spec:
  type: NodePort
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
    name: http
    nodePort: 30180
  selector:
    name: nginx-test
EOF

##創建資源
kubectl apply -f nfs-static-nginx-dp-many.yaml -n ${NAMESPACE}

二、nginx 使用 nfs 動態 PV

https://github.com/Lancger/opsfull/blob/master/components/external-storage/3%E3%80%81%E5%8A%A8%E6%80%81%E7%94%B3%E8%AF%B7PV%E5%8D%B7.md

1、動態 nfs-dynamic-nginx.yaml

通過參數控制在哪個命名空間創建

##清理命名空間
kubectl delete ns k8s-public

##創建命名空間
kubectl create ns k8s-public

##清理資源
kubectl delete -f nfs-dynamic-nginx-deployment.yaml -n k8s-public

cat >nfs-dynamic-nginx-deployment.yaml<<\EOF
##動態申請nfs-dynamic-pvc
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nfs-dynamic-claim
spec:
  storageClassName: nfs-storage #--需要與上面創建的storageclass的名稱一致
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 90Gi
##部署應用nginx
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    name: nginx-test
spec:
  replicas: 3
  selector:
    matchLabels:
      name: nginx-test
  template:
    metadata:
      labels:
       name: nginx-test
    spec:
      containers:
      - name: nginx-test
        image: docker.io/nginx
        volumeMounts:
        - mountPath: /usr/share/nginx/html
          name: nginx-data
        ports:
        - containerPort: 80
      volumes:
      - name: nginx-data
        persistentVolumeClaim:
          claimName: nfs-dynamic-claim
##創建service
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-test
  labels:
    name: nginx-test
spec:
  type: NodePort
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
    name: http
    nodePort: 30090
  selector:
    name: nginx-test
EOF

##創建資源
kubectl apply -f nfs-dynamic-nginx-deployment.yaml -n k8s-public

##查看pv資源
kubectl get pv -n k8s-public --show-labels

##查看pvc資源
kubectl get pvc -n k8s-public --show-labels

##查看pod
$ kubectl get pods -n k8s-public
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-544f569478-5t8wm   1/1     Running   0          40s
nginx-deployment-544f569478-8gks5   1/1     Running   0          40s
nginx-deployment-544f569478-pw96x   1/1     Running   0          40s

#可以看到，nginx應用已經部署成功。
#nginx應用的數據目錄是使用的nfs共享存儲，我們在nfs共享的目錄里加入index.html文件，然後再訪問nginx-service暴露的端口
#切換到到nfs-server服務器上

#注意動態的在這個目錄，創建的目錄命名方式爲 “namespace名稱-pvc名稱-pv名稱”
/data/nfs/kube-public-test-claim-pvc-ad304939-e75d-414f-81b5-7586ef17db6c

echo "Test NFS Share discovery with nfs-dynamic-nginx-deployment" > /data/nfs/kube-public-test-claim-pvc-ad304939-e75d-414f-81b5-7586ef17db6c/index.html

#在瀏覽器上訪問kubernetes主節點的 http://master:30090，就能訪問到這個頁面內容了

參考文檔：

https://kubernetes.io/zh/docs/tasks/run-application/run-stateless-application-deployment/
https://blog.51cto.com/ylw6006/2071845 在kubernetes集羣中運行nginx

作者：Lancger
github 地址：https://url.cn/5osLAuY
轉載請獲得作者授權
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Kubernetes 之 Nginx 動靜態 PV 持久存儲下篇

一、nginx 使用 nfs 靜態 PV

1、靜態 nfs-static-nginx-rc.yaml

2、靜態 nfs-static-nginx-deployment.yaml

3、nginx 多目錄掛載

4、參數 namespace

二、nginx 使用 nfs 動態 PV

1、動態 nfs-dynamic-nginx.yaml

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Kubernetes 之 Nginx 動靜態 PV 持久存儲 下篇

一、nginx 使用 nfs 靜態 PV

1、靜態 nfs-static-nginx-rc.yaml

2、靜態 nfs-static-nginx-deployment.yaml

3、nginx 多目錄掛載

4、參數 namespace

二、nginx 使用 nfs 動態 PV

1、動態 nfs-dynamic-nginx.yaml

Kubernetes 之 Nginx 動靜態 PV 持久存儲下篇