Docker Jenkins

Run Jenkins in a docker container and give it socket access to build/run other docker containers. This was an experiement for a presentation I did on docker.

Lessons Learned

/var/jenkins_home probably needs 777 permissions
docker.sock probably needs 777 permissions since user/groups get confused
SSH creds can be generated by jenkins user.
Git commands require those creds added into credentials and if you have scripts that use ssh then you will want to add those ssh creds to publish over ssh so that pipelines can ssh into other machines
Keep the filepath of jenkins_home the same on host and in container so if you need volume mounts inside the container, they will be translated correctly onto the host machine
Running docker with userns will make things more complicated with user/group translations