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It has been possible to run GitLab the application on K8s for some time now for the majority of self-managed deployments. There were some limitations however, for running GitLab on K8s at the very large scale of GitLab.com that we have been working through in the last year.

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> August 2019 when we migrated the GitLab Container Registry to Kubernetes, the first service to move. Though this was a critical and high traffic service, it was a good choice for the first migration because it is a stateless application with only a few external dependencies

I was under the impression that porting a large stateless service was something that wasn't too bad to do with K8S? What limitations prevented this from going ahead earlier?

Yeah, this is why we decided to migrate it first about a year ago, and we probably could have done it sooner than that. Other services were not yet ready to migrate until recently due to some blocking issues which was a factor in the decision.

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