Docker container exits after running (how to keep running)

Phenomenon

Start the Docker container

docker run –name [CONTAINER_NAME] [CONTAINER_ID]

Check the running status of the container

docker ps -a

It is found that the mydocker container just started has exited

reason

It is very important to point out that for a Docker container to run in the background, there must be a foreground process.

If the command run by the container is not a command that has been suspended (such as running top or tail), it will automatically exit.

The main thread of the docker container (the command executed by CMD in the dockerfile) ends and the container exits

Workaround

You can use interactive startup

docker run -i [CONTAINER_NAME or CONTAINER_ID]

The above is not very friendly, it is recommended to use background mode and tty options

docker run -dit [CONTAINER_NAME or CONTAINER_ID]

View container status

docker ps -a

Docker calls out the background container

docker attach [CONTAINER_NAME or CONTAINER_ID]

Tips: When exiting, use [ctrl + D], which will end the current Docker thread and the container. You can use [ctrl + P] [ctrl + Q] to exit without terminating the container.

The following command will execute the specified command in the specified container. [ctrl+D] will not terminate the container after exiting.

docker exec -it [CONTAINER_NAME or CONTAINER_ID] /bin/bash

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.