PersistentVolume与PersistentVolumeClaim的使用

制作nginx执行

下载镜像

swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/rockylinux:9

编写Dockerfile

FROM swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/rockylinux:9
LABEL maintainer="huang.jinjin"

RUN yum install wget -y
RUN yum install nginx -y

COPY test.html /usr/share/nginx/html/

EXPOSE 80
ENTRYPOINT ["/usr/sbin/nginx","-g","daemon off;"]

test.html文件是随便编写的html文件

构建镜像

docker build -t nginx:v1.0 .

运行镜像

docker run --name mynginx -p 80:80 nginx

访问地址

http://127.0.0.1/test.html

使用nfs-server

创建namespace

nfs-namespace.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: nfs-ns

创建PersistentVolume

nfs-pv.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-pv
  namespace: nfs-ns
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  nfs:
    server: 10.0.2.11
    path: "/root/share"

创建PersistentVolumeClaim

nfs-pvc.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-pvc
  namespace: nfs-ns
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

创建nginx deployment

nfs-nginx-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: nfs-ns
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:v1.0
        ports:
        - containerPort: 80
        volumeMounts:
        - name: nginx-storage
          mountPath: /usr/share/nginx/html
      volumes:
      - name: nginx-storage
        persistentVolumeClaim:
          claimName: nfs-pvc

---

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
  namespace: nfs-ns
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
      nodePort: 30018
  type: NodePort

这样/usr/share/nginx/html目录就挂载到了宿主机的/root/share目录。在/root/share创建 test.html 文件，并写入内容。

启动

kubectl apply -f .

输出
namespace/nfs-ns created
deployment.apps/nginx-deployment created
service/nginx-service created
persistentvolume/nfs-pv created
persistentvolumeclaim/nfs-pvc created

查看

kubectl get namespace
kubectl get pv -n nfs-ns
kubectl get pvc -n nfs-ns
kubectl get pvc -n nfs-ns
kubectl get svc -n nfs-ns

访问

http://10.0.2.12:30018/test.html

10.0.2.12为部署的pod的宿主机ip；30018为service映射的port