I'm trying to run MULTIPLE commands like this.
docker run image cd /path/to/somewhere && python a.py
But this gives me "No such file or directory" error because it is interpreted as...
"docker run image cd /path/to/somewhere" && "python a.py"
It seems that some ESCAPE characters like "" or () are needed.
So I also tried
docker run image "cd /path/to/somewhere && python a.py"
docker run image (cd /path/to/somewhere && python a.py)
but these didn't work.
I have searched for Docker Run Reference but have not find any hints about ESCAPE characters.
This question is related to
docker
docker-image
You can also pipe commands inside Docker container, bash -c "<command1> | <command2>"
for example:
docker run img /bin/bash -c "ls -1 | wc -l"
But, without invoking the shell in the remote the output will be redirected to the local terminal.
bash -c
works well if the commands you are running are relatively simple. However, if you're trying to run a long series of commands full of control characters, it can get complex.
I successfully got around this by piping my commands into the process from the outside, i.e.
cat script.sh | docker run -i <image> /bin/bash
Just to make a proper answer from the @Eddy Hernandez's comment and which is very correct since Alpine comes with ash not bash.
The question now referes to Starting a shell in the Docker Alpine container which implies using sh
or ash
or /bin/sh
or /bin/ash/
.
Based on the OP's question:
docker run image sh -c "cd /path/to/somewhere && python a.py"
For anyone else who came here looking to do the same with docker-compose
you just need to prepend bash -c
and enclose multiple commands in quotes, joined together with &&
.
So in the OPs example docker-compose run image bash -c "cd /path/to/somewhere && python a.py"
You can do this a couple of ways:
Use the -w option to change the working directory:
-w, --workdir="" Working directory inside the container
https://docs.docker.com/engine/reference/commandline/run/#set-working-directory--w
Pass the entire argument to /bin/bash:
docker run image /bin/bash -c "cd /path/to/somewhere; python a.py"
If you want to store the result in one file outside the container, in your local machine, you can do something like this.
RES_FILE=$(readlink -f /tmp/result.txt)
docker run --rm -v ${RES_FILE}:/result.txt img bash -c "cat /etc/passwd | grep root > /result.txt"
The result of your commands will be available in /tmp/result.txt
in your local machine.
Source: Stackoverflow.com