Running rabbitmqadmin in docker fails

Question

I cant get the rabbitmqadmin to work in my rabbitmq docker.

I have this Dockerfile:

FROM rabbitmq:3-management

RUN apt-get update && apt-get install -y python

ADD rabbitmqadmin /usr/local/bin/rabbitmqadmin
ADD rabbitconf.json /rabbitconf.json

RUN chmod 755 /usr/local/bin/rabbitmqadmin

CMD ["/usr/local/bin/rabbitmqadmin -q import /rabbitconf.json"]

Build it like this:

docker build --tag=myrabbit .

Run it like this:

docker run -d -p 8080:15672 myrabbit

It does not work... The log shows:

/docker-entrypoint.sh: line 8: /usr/local/bin/rabbitmqadmin -q import     /rabbitconf.json: No such file or directory

What am I doing wrong ?

BR

Answer 1

You've mixed up the shell and exec formats for the CMD instruction.

CMD /usr/local/bin/rabbitmqadmin -q import /rabbitconf.json

Should work.

For more information see http://docs.docker.com/reference/builder/#cmd.

I'll leave the following for anyone else debugging similar problems:

The parent image rabbitmq:3-management is declares an ENTRYPOINT which runs the docker-entrypoint.sh script. Your CMD instruction is passed to this ENTRYPOINT script as an argument. Somewhere in the script, things go wrong.

Without seeing the script, we can't really debug the problem. However, one workaround would be to override the ENTRYPOINT instruction either in your Dockerfile or on the command line. For example, what happens if you run:

docker run -d -p 8080:15672 --entrypoint="" myrabbit

Note that this isn't the correct solution; you should try to use the ENTRYPOINT script of the parent image, or fix it so that it does what you want.