Self-Hosted Build Isolation?

[ScottPierce]

I currently am running Self-Hosted Runners. We have a pretty big build machine, and so I'm running Debian Linux, and have 10 runners configured directly on the machine. We were experiencing isolation issues between each of the runs, so we are using the container syntax and ensuring each build is run inside of a docker container.

This has worked well, until we wanted to startup all of our servers and databases in CI to run tests, and we use Docker for local representations of Databases. This means that we end up running docker-in-docker, which we have found issues talking to our databases from within a container, when using docker in docker.

I have very little Kubernetes knowledge. I don't know how kubernetes creates isolation for builds. Does this project offer us a solution to our issues if we continue to use self-hosted runners? If not, does it offer a solution if we move to use google cloud as a host?