【K8s】Nginx容器自定义启动命名无法重定向文件

r囧r小猫 2023-06-26 10:37 21阅读 0赞

现需构建一个Pod(含两个容器)，代码中通过指定的主机名实现彼此的访问，现需给nginx添加硬解析。重新定义启动命令。

错误定义：

apiVersion: v1
    kind: Pod
    metadata:
      name: test-2
      labels:
        name: test2
    spec:
      volumes:
      - name: uwsgi-config
        configMap:
          name: uwsgi-1-alpine-conf  
      containers:
      - name: main
        image: nginx 
        command: ["/bin/bash"]
        args:
        - -c 
        - echo test;echo 127.0.0.1 os >>/etc/hosts;nginx -g 'daemon off;'  !使用该命名将无法无法重定向内容到文件
        volumeMounts:
        - name: uwsgi-config
          mountPath: /mnt/default.conf
          subPath: default.conf
        - name: uwsgi-config
          mountPath: /tmp/server.py
          subPath: server.py
      - name: os
        image: centos
        command: ["/bin/bash"]
        args:
        - -c 
        - echo test;echo 127.0.0.1 os >>/etc/hosts;tail -f /dev/null

正确定义

apiVersion: v1
    kind: Pod
    metadata:
      name: test-2
      labels:
        name: test2
    spec:
      volumes:
      - name: uwsgi-config
        configMap:
          name: uwsgi-1-alpine-conf  
      containers:
      - name: main
        image: nginx
        command: ["/bin/bash"]
        args:
        - -c 
        - echo 127.0.0.1 os >>/etc/hosts;nginx;tail -f /dev/null !nginx去掉启动参数
        volumeMounts:
        - name: uwsgi-config
          mountPath: /mnt/default.conf
          subPath: default.conf
        - name: uwsgi-config
          mountPath: /tmp/server.py
          subPath: server.py
      - name: os
        image: centos
        command: ["/bin/bash"]
        args:
        - -c 
        - echo 127.0.0.1 os >>/etc/hosts;tail -f /dev/null

虽然这种方式启动的容器，主进程不是nginx，nginx挂了容器也不会重启，但可通过添加livenessProbe属性监听。  
方法二：加入while循环判断

command: ["/bin/bash"]
            # args: ["-c","nginx;while [ $? -ne 0 ];do sleep 1;echo '127.0.0.1 php'>>/etc/hosts;nginx;done;tail -f /dev/null"]
    args:
    - -c
    - | nginx while [ $? -ne 0 ] do sleep 1 echo '127.0.0.1 php' >> /etc/hosts nginx -g 'daemon off;' done