zoukankan      html  css  js  c++  java
  • k8s 的容器command用法举例

    问题描述以及解决:

    问题一 CrashLoopBackOff

    如容器运行报如下错误:

    且在describe和kubelet日志中没有明确记录原因,基本都是因为command命令不合法导致

    如需要运行多条命令,使用;不要使用&&

    如下示例:

              command: ["/bin/sh"]

              args: ["-c","/usr/local/bin/redis_start;while true;do echo hello;sleep 1;done"]

    docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

    k8s的command对应如上docker命令的[COMMAND] [ARG...]

    1. 但在k8里这样报错,top必须得有个参数,错误写法:

    apiVersion: v1    
    kind: Pod    
    metadata:    
      name: centos  
      labels:    
        app: centos    
    spec:    
      containers:    
      - name: mycentos  
        image: centos  
        imagePullPolicy: IfNotPresent  
        command: ["top",]  

    报错是:env找不到...

    给top加上参数:

    apiVersion: v1    
    kind: Pod    
    metadata:    
      name: centos  
      labels:    
        app: centos    
    spec:    
      containers:    
      - name: mycentos  
        image: centos  
        imagePullPolicy: IfNotPresent  
        command: ["top","-b"]  

    也可以这样写:

    apiVersion: v1    
    kind: Pod    
    metadata:    
      name: centos  
      labels:    
        app: centos    
    spec:    
      containers:    
      - name: mycentos  
        image: centos  
        imagePullPolicy: IfNotPresent  
        command: ["top"]  
        args: ["-b"]  

    使用shell命令的写法:

    apiVersion: v1    
    kind: Pod    
    metadata:    
      name: centos  
      labels:    
        app: centos    
    spec:    
      containers:    
      - name: mycentos  
        image: centos  
        imagePullPolicy: IfNotPresent  
        command: ["/bin/sh"]  
        args: ["-c","while true;do echo hello;sleep 1;done"]  

    或者这样:

    apiVersion: v1      
    kind: Pod      
    metadata:      
      name: centos    
      labels:      
        app: centos      
    spec:      
      containers:      
      - name: mycentos    
        image: centos    
        imagePullPolicy: IfNotPresent    
        command: ["/bin/sh","-c","while true;do echo hello;sleep 1;done"]  
     
  • 相关阅读:
    nginx配置ssl双向验证 nginx https ssl证书配置
    查看nginx cache命中率
    nginx 直接在配置文章中设置日志分割
    tomcat配置文件server.xml详解
    nagios服务端安装
    nagios客户端安装
    nagios原理及配置详解
    Nagios 监控系统架设全攻略
    nginx日志配置
    为MySQL选择合适的备份方式
  • 原文地址:https://www.cnblogs.com/wxwgk/p/15216965.html
Copyright © 2011-2022 走看看