How to run process in Dockerfile and keep it running when calling next commands

Question

I want to create a docker image with cassandra and already some keyspace/tables/data in it. The image is necessary for testing, and we have quite much data we need, so I don't want to load it in docker-entrypoint.sh, so that container gets up fast.

This is my simplified Dockerfile, but obviously it doesn't work:

FROM cassandra:3.11

COPY cql cql

RUN cqlsh -f /cql/001_create_keyspace.cql

As I just learned, cassandra is not running when I try to issue RUN cqlsh.

Is there some way to run it, load the data, and then stop cassandra? Or is there any other way to create cassandra image with the data already loaded?

herm · Accepted Answer · 2018-05-09 10:05:07Z

1

You could import the data in a running container, commit that container and thereby create a new image.

answered May 9, 2018 at 10:05

herm

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2 Comments

amorfis Over a year ago

I think that's good idea! I want the container to be easy to recreate, but I can write some scripts for that. Thanks!

amorfis Over a year ago

Unfortunately, this doesn't work :( Cassandra image creates volume for data, and all the changes to data, like keyspace, tables etc, are stored on the volume, not inside the container. docker commit only stores changes made to the container :(

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