Docker image with Cassandra already running

[fslevoaca]

Hello,
Is it possible to create a docker image having a Cassandra instance already started ?
Most of the time, docker users are starting Cassandra during docker run command.
What I want is that when I am starting the corresponding image container, to have Cassandra already running and not wait for it to start each time I am running the container.

[dmaze]

Is it possible to create a docker image having a Cassandra instance already started ?

No. (Imagine the image is a tar file.)