如何保持无限循环运行，以便在docker中不要关闭容器 [英] How to keep an infinite loop running in order to not close a container in docker

问题描述

我想要保持Docker容器运行即使执行运行命令（容器在 docker运行后立即退出.. 我知道命令：

  while：; do 
 sleep 300 
 done 
   docker run 中的p> 
 
 
将使其运行，但是如何按顺序编辑 Dockerfile 本身保持运行？
解决方案
您可以通过将要执行的命令放入脚本中，并设置脚本作为Docker启动容器时运行的命令：
  FROM sixeyed / ubuntu-with-utils 
 
 RUN echo'ping localhost&'> /bootstrap.sh 
 RUN echo'sleep infinity'>> /bootstrap.sh 
 RUN chmod + x /bootstrap.sh 
 
 CMD /bootstrap.sh 
  
从这个Dockerfile构建一个图像并运行一个容器从图像开始，它将开始 ping 背景和 sleep 在前台，所以您可以使用 docker run -d 守护程序集，并且它将继续运行。这不是理想的 -  Docker只监视运行容器的最后一个进程，因此它将检查 sleep 
 
 
 
 code>而不是 ping 。如果 ping 命令错误，容器将继续运行。通常，您希望真正的应用程序成为您在 CMD 中开始的唯一工具。
 
I want to keep a docker container running even after executing the run command (containers exit immediately after docker run... I know the command:
  while :;do 
   sleep 300
  done
during docker run will make it run but how do I edit the  Dockerfile  itself in order to keep it running?
解决方案
You can do this by putting the commands you want to execute into a script, and setting the script to be the command Docker runs when it starts a container:
FROM sixeyed/ubuntu-with-utils

RUN echo 'ping localhost &' > /bootstrap.sh
RUN echo 'sleep infinity' >> /bootstrap.sh
RUN chmod +x /bootstrap.sh

CMD /bootstrap.sh
When you build an image from this Dockerfile and run a container from the image, it will start ping in the background and sleep in the foreground, so you can daemonize the container with docker run -d and it will keep running.

This is not ideal though - Docker only monitors the last process it started when it ran the container, so it will be checking on sleep rather than ping. If the ping command errors the container will keep running. Typically, you want the real application to be the only thing you start in the CMD.

                        
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