We recently migrated from a self-managed Gitlab instance to gitlab.com. The system administrator of the self-managed Gitlab instance said this would simply entail a git pull && git push and that the migration will be done quickly. Depending on your usage of Gitlab, this is either a naïve oversimplification or straight forward dangerous. The truth is more nuanced and entails quite a bit more work. Since the migration took us a couple of full working days and we wrote some reusable checklists ...
