Phenomenon
Start the docker container
docker run –name [CONTAINER_NAME] [CONTAINER_ID]
Check the container running status
docker ps -a
I found that the mydocker container that just started has exited
reason
A very important point to be explained: when the Docker container runs in the background, there must be a foreground process.
If the commands run by the container are not those that have been suspended (such as running top or tail), they will automatically exit.
The main thread of the docker container (the command executed by CMD in the dockfile) ends, and the container will exit
Solution
Can be started using interactively
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]
Check 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 thread of docker and the container ends. You can use [ctrl + P][ctrl + Q] to exit without terminating the container running.
The following command will execute the specified command in the specified container. [ctrl+D] will not terminate the container operation after exiting.
docker exec -it [CONTAINER_NAME or CONTAINER_ID] /bin/bash
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.