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I have a very simple dockerfile with only one row, namely "FROM ubuntu". I created an image from this dockerfile by the command docker build -t ubuntu_ .
I know that I can create a new docker container from this image an run it interactively with the command
docker run -it my_new_container
I can later start this new container with the command
start my_new container
As I understand it, I should also be able to use this container it interactively by
start -i my_new container
But, it does not work. It just runs and exits. I don't get to the container's command prompt as I do when I use run. What am I doing wrong?
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If you need to start an interactive shell inside a Docker Container, perhaps to explore the filesystem or debug running processes, use docker exec with the -i and -t flags. The -i flag keeps input open to the container, and the -t flag creates a pseudo-terminal that the shell can attach to.
To run a docker container in the background or the detached mode from the terminal, you can use the docker run command followed by the -d flag (or detached flag) and followed by the name of the docker image you need to use in the terminal.
Docker 'run' command to start an interactive BaSH session · GitHub.
In order to start a Bash shell in a Docker container, execute the “docker exec” command with the “-it” option and specify the container ID as well as the path to the bash shell. If the Bash is part of your PATH, you can simply type “bash” and have a Bash terminal in your container.
If i understood correctly, you want to see the logs from container in terminal, same as when you run the image with docker run. If that's the case, then try with
docker start -a my_docker_container
You can enter a running container with:
docker exec -it <container name> /bin/bash
example:
docker exec -it my_new_container /bin/bash
you can replace bash with sh if bash is not available in the container.
and if you need to explicitly use a UID , like root = UID 0, you can specify this:
docker exec -it -u 0 my_new_container /bin/bash
which will log you as root
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