On testing docker base images

For the Boltron deliverable (the Modularity thing) we would like to build, test and ship a Base Runtime / Boltron docker base image. Now, the whole process is still not entirely clear to me so I'll just go ahead and briefly describe how I think it works: 1. You build your RPM components in koji 2. You have your components appear in a compose 3. You write a kickstart file that creates your base image 4. You have your kickstart file included in fedora-kickstarts 5. You file a releng ticket to run your kickstart file against your compose regularly 6. Something processes the kickstart file somewhere and builds the base image (is this imagefactory in koji? is this OSBS? is this, er, pungi?) 7. The image is then tested somehow, hopefully 8. The image is then pushed to Fedora registry Feel free to correct or clarify any of the points above. Anyhow, the main point of this mail are the last two items on that list. How do we test docker images, if at all? Do we only run some sanity tests or is there a way to test their contents as well? We now have some PoC tests[0] we run on our own test box before we push the Base Runtime image to Docker Hub[1]; it would be lovely if something like that was possible in Fedora infra. Even better -- it shouldn't push the image anywhere if [some of] the tests fail. Pushing the image and marking it as a candidate would work, too. Then if the tests pass, it could be promoted to a stable status or something. This is still confusing to me. We're kinda done with the first two steps and I'd like to push this forward. Thanks for help, P [0] https://github.com/libre-server/baseruntime-docker-tests [1] https://hub.docker.com/r/baseruntime/baseruntime/