需求，

3个容器访问的数据是一样的， （数据共享 nfs）

修改一个配置后， 不需要每一个都修改， （configMap 配置文件共享）

cat 20-pods-volumes-nfs-cm.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx.conf
data:
  nginx.conf: |
    user  nginx;
    worker_processes  auto;
    error_log  /var/log/nginx/error.log notice;
    pid        /var/run/nginx.pid;
    events {
        worker_connections  1024;
    }
    http {
        include       /etc/nginx/mime.types;
        default_type  application/octet-stream;
        log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                          '$status $body_bytes_sent "$http_referer" '
                          '"$http_user_agent" "$http_x_forwarded_for"';
        access_log  /var/log/nginx/access.log  main;
        sendfile        on;
        keepalive_timeout  65;
        include /etc/nginx/conf.d/*.conf;
    }

---

apiVersion: v1
kind: Pod
metadata:
  name: dashu-volumes-nfs-cm-004
spec:
  volumes:
  - name: data
    nfs:
      server: master231
      path: /baimei/data/kubernetes
  - name: etc
    configMap:
      name: nginx.conf
      items:
      - key: nginx.conf
        path: nginx.conf
  containers:
  - name: web
    image: harbor.baimei.com/baimei-web/nginx:1.25.1-alpine
    volumeMounts:
    - name: data
      mountPath: /usr/share/nginx/html
    - name: etc
      mountPath: /etc/nginx/nginx.conf
      subPath: nginx.conf

---

apiVersion: v1
kind: Pod
metadata:
  name: dashu-volumes-nfs-cm-005
spec:
  volumes:
  - name: data
    nfs:
      server: master231
      path: /baimei/data/kubernetes
  - name: etc
    configMap:
      name: nginx.conf
      items:
      - key: nginx.conf
        path: nginx.conf
  containers:
  - name: web
    image: harbor.baimei.com/baimei-web/nginx:1.25.1-alpine
    volumeMounts:
    - name: data
      mountPath: /usr/share/nginx/html
    - name: etc
      mountPath: /etc/nginx/nginx.conf
      subPath: nginx.conf

---

apiVersion: v1
kind: Pod
metadata:
  name: dashu-volumes-nfs-cm-006
spec:
  volumes:
  - name: data
    nfs:
      server: master231
      path: /baimei/data/kubernetes
  - name: etc
    configMap:
      name: nginx.conf
      items:
      - key: nginx.conf
        path: nginx.conf
  containers:
  - name: web
    image: harbor.baimei.com/baimei-web/nginx:1.25.1-alpine
    volumeMounts:
    - name: data
      mountPath: /usr/share/nginx/html
    - name: etc
      mountPath: /etc/nginx/nginx.conf
      subPath: nginx.conf

这种比较麻烦的 ， 接下来看看 rc资源实现控制器 ：连接