This command could also run as the last step in a custom script used with CMD or ENTRYPOINT.
An easy way to do this is to tail the /dev/null device as the CMD or ENTRYPOINT command of your Docker image. If you would like to keep your container running in detached mode, you need to run something in the foreground. How do I run a docker container continuously? For example, when you run docker attach -detach-keys="ctrl-a" test and you press CTRL+A you will exit the container, without killing it. You can use the -detach-keys option when you run docker attach to override the default CTRL+P, CTRL + Q sequence (that doesn't always work). command at the end of your script.Īlso Know, how do I get out of a docker container without exiting it? When you attach and exit the container by CTRL+D (most common way to do it), you stop the container because you just killed the main process which you started your container with the above command.
This means docker published any EXPOSE port with the docker image automatically so you can access the port from the host.įurthermore, why does my Docker container exit? you are basically running the container in background in interactive mode. Just run exit or hit ctrl-D like you normally would. To exit out of the docker container bash shell. Similarly one may ask, how do I exit Docker? If it's another process running, the combination would be ctrl+c.
With docker -rm, the above-stopped container is removed when it exit.Ĭf381d99f454 debian "ls -la" About a minute ago Exited (0) About a minute ago crazy_swirlesĭ362659da5fc markdownhtml:1.1 "java -jar app.jar" 11 days ago Exited (255) 10 days ago 0.0.0.The Common Approach, Stopping the Container If you have started the container interactively, and are in a bash-like environment, you'd usually type ctrl+d to exit the session. delete all stopped containers with docker rm (docker ps -a -q) delete all images with docker rmi (docker images -q) update and stop a container that is in a. We can delete the stopped container with a single command, but we have a better option -rm, it will remove the container when it exit.Ģ.5 Run the container from the Debian image again, and send an echo command and exit the container, this time with -rm option.Ģ.6 List the containers again this time, there is no new stopped container in the list. If we test a lot of containers and this will take up the disk space very fast. In the below example, the new stopped crazy_swirles container takes 10MB disk space.Ĭf381d99f454 debian "ls -la" About a minute ago Exited (0) About a minute ago crazy_swirles (NEW Container) dockerenvĭrwxr-xr-x 2 root root 4096 Mar 27 00:00 binĭrwxr-xr-x 2 root root 4096 Feb 1 17:09 bootĭrwxr-xr-x 5 root root 340 May 23 04:04 devĭrwxr-xr-x 1 root root 4096 May 23 04:04 etcĭrwxr-xr-x 2 root root 4096 Feb 1 17:09 homeĭrwxr-xr-x 7 root root 4096 Mar 27 00:00 libĭrwxr-xr-x 2 root root 4096 Mar 27 00:00 lib64ĭrwxr-xr-x 2 root root 4096 Mar 27 00:00 mediaĢ.4 List all the containers again, the stopped Debian container is listed here, and the stopped containers may take disk space. The container finished the command job and exit.ĭrwxr-xr-x 1 root root 4096 May 23 04:04. In the below example, we have one stopped container.ĬONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESĭ362659da5fc markdownhtml:1.1 "java -jar app.jar" 11 days ago Exited (255) 10 days ago 0.0.0.0:80->8080/tcp xenodochial_volhardĢ.3 We start a container from the Debian image and run a ls -la command. Markdownhtml 1.1 18e69a3a2aae 12 days ago 144MBĭebian 0.1 ae0872208331 7 weeks ago 114MBĢ.2 List all containers, running, and stopped containers. Use with detachfalse to remove the container after successful execution. It assumes that you are comfortable using the command-line, cmd.exe. Its not meant to be an all inclusive dissertation on Docker but rather a lets get you going style brief.
2.1 List all images, and then we use the Debian image to test the -rm option.īusybox latest 78096d0a5478 9 days ago 1.22MB The version of the Docker API running on the Docker Host. This is a brief tutorial on how to run Python in a Docker container.