Solve the problem of the container showing Exited (0) after docker run

I made a Dockerfile for openresty on centos7 and built it.

docker run -d -p 801:80 openresty:1.19 /usr/local/openresty/nginx/sbin/nginx

After that, docker ps -a shows the following

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 9dee2d04b3b5 openresty:1.19 "/usr/local/openrest…" 24 seconds ago Exited (0) 7 seconds ago gifted_bhabha 69846af3baa7 redis:latest "docker-entrypoint.s…" 24 minutes ago Up 24 minutes 0.0.0.0:6379->6379/tcp rds

The openresty status is displayed as Exited (0)

reason:

Docker's mechanism is to run the container in the background. There must be at least one foreground process. If the command run by the container is not a command that has been suspended (such as running top, tail), it will automatically exit.

solve:

You can use the sh command containing the -g "daemon off;" configuration item to start the nginx service in the foreground mode.

Therefore, the startup command is adjusted as follows:

docker run -d -p 801:80 openresty:1.19 /usr/local/openresty/nginx/sbin/nginx -g "daemon off;"

Run docker ps -a again to see the effect

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 0291303ca61b openresty:1.19 "/usr/local/openrest…" 29 seconds ago Up 28 seconds strange_curie 69846af3baa7 redis:latest "docker-entrypoint.s…" 26 minutes ago Up 26 minutes 0.0.0.0:6379->6379/tcp rds

Supplement: Docker is always in the exited state when it is started. Solution

Docker is always in the exited state when it is started

Workaround

Step 1. Docker rm container id to delete the container

Step 2: docker rmi image id to delete the image (the image can only be deleted after deleting the container first)

Step 3: docker build -t tomcat:centos . Recreate the container

Step 4. docker run --privileged -it -d --name tomcat01 -p 1216:8080 tomcat:centos (add permissions and)

Specify a pseudo terminal)

Cause of error 1. Lack of permissions 2. No terminal is running

Note: –privileged adds permissions

-t specifies a pseudo terminal

The above is my personal experience. I hope it can give you a reference. I also hope that you will support 123WORDPRESS.COM. If there are any mistakes or incomplete considerations, please feel free to correct me.