GitLab分支权限配置咨询：为不同部门分配专属分支访问权限

Absolutely! GitLab has all the tools you need to set up this granular branch access model—no extra tools required. Let’s break down exactly how to implement it step by step:

First, group your team members by their roles to simplify permission assignments:

• Log into your self-hosted GitLab instance and navigate to your target project’s Settings > Members page.
• Create three dedicated user groups: Dev-Team, QA-Team, and Team-Leads (you can use custom names if preferred).
• Add each developer, tester, and team lead to their respective groups. Assign a base project role like Developer to each group first—we’ll lock down branch-specific permissions next.

GitLab’s Protected Branches feature lets you restrict who can push/merge to specific branches. Here’s how to configure it for your workflow:

For the master branch #

• Go to your project’s Settings > Repository > Protected branches.
• Click Protect a branch, enter master as the branch name.
• Under Allowed to push and merge, select only the Team-Leads group. Leave all other groups unselected—this ensures only leads can modify the master branch directly.
• Uncheck Allow force push (recommended) to prevent accidental overwrites of master.

For the dev branch #

• Click Protect a branch again, enter dev.
• Under Allowed to push and merge, select only the Dev-Team group. This locks down dev branch access exclusively to developers.
• Optional: If you want to prevent non-developers from creating the dev branch (though it’s usually a permanent branch), you can enable Allowed to create and limit it to Dev-Team.

For the qa branch #

• Repeat the process for qa: click Protect a branch, enter qa, and set Allowed to push and merge to only the QA-Team group. Testers will now have exclusive access to modify the qa branch.

To ensure code can only reach master after lead review, add approval requirements to the master branch:

• Back in Settings > Repository > Protected branches, find the master branch rule and click Edit.
• Enable Number of required approvals and set it to at least 1.
• Under Approval groups, select Team-Leads to ensure only leads can approve merge requests to master.
• Now, any merge request (from dev or qa to master) will require a lead’s approval before it can be merged—exactly matching your workflow.

Before rolling this out to the team, do a quick test to confirm everything works:

• Log in as a developer: You should be able to push/merge to dev, but get permission denied when trying to touch qa or master.
• Log in as a tester: You’ll have access only to qa, with no rights to dev or master.
• Log in as a team lead: You’ll be able to modify all branches, approve merge requests, and merge code to master.

If you need even more control (like enforcing branch naming conventions for feature branches), GitLab’s Repository Rules (under Settings > Repository) can handle that too—but the steps above cover your core requirements perfectly.

内容的提问来源于stack exchange，提问作者Tony Jose