CODEWITHSUNDEEP
bashdocker
Maripi
Maripi

Reputation: 81

how to modify files in a container using a script

I am trying to run a container and modify certain files in it. I am trying to do this using a script. If I use: docker run -i -t <container> <image>, it is giving me 

STDERR: cannot enable tty mode on non tty input

If I use: docker run -d <container> <image> bash, the container is not starting.

Is there anyway to do this?

Thanks

Upvotes: 2

Views: 788

Answers (2)

AkkarinZA
AkkarinZA

Reputation: 601

So to start off, the -i -t is for an interactive tty mode for interacting with the container. If you are invoking this in a script then it's likely that this won't work as you expect.

This is not really the way containers are meant to be used. If it is a permanent change, you should be rebuilding the image and using that for the container.

However, if you want to make changes to files that are reflected in the container, you could consider using volumes to mount directories from the host into the container. This would look something like:

docker run -v /some/host/dir:/some/container/dir -d container

At this point anything you change within /some/host/dir will be within the container at /some/container/dir. You can then make your changes with a script on the host, without having to invoke the docker cli.

Upvotes: 0

anubhava
anubhava

Reputation: 784868

Run the docker image in background using:

docker run -d <image>:<version>

Check running docker containers using:

docker ps

If there is only one container running you can use below command to attach to a running docker container and use bash to browser files/directories inside container:

docker exec -it $(docker ps -q) bash

You can then modify/edit any file you want and restart the container.

To stop a running container:

docker stop $(docker ps -q)

To run a stopped container:

docker start -ia $(docker ps -lq)

Upvotes: 1

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