A basic Git server is good enough for many purposes. Sometimes, you need precise control over the workflow, though.
One concrete example is merging changes into configuration code for critical parts of the infrastructure. While my opinion is that it's central to DevOps to not place unnecessary red tape around infrastructure code, there is no denying that it's sometimes necessary. If nothing else, developers might feel nervous committing changes to the infrastructure and would like for someone more experienced to review the code changes.
Gerrit is a Git-based code review tool that can offer a solution in these situations. In brief, Gerrit allows you to set up rules to allow developers to review and approve changes made to a code base by other developers. These might be senior developers reviewing changes made by inexperienced developers, or the more common case...
