Make integration with GitLab be easier

Background

Gitlab is a hosted git service that works much like Github, with an interactive web panel for managing your projects and viewing code. More and more users choose it to host on their own sever. Some users are using KubeSphere DevOps as their CI/CD tool, but there is no interaction between DevOps and GitLab, such as sending pipeline build status back to GitLab.

Proposal

Install GitLab plugin to complete this task.

But there are two things we should pay attention to:

• Be aware of supported GitLab versions
• How to configure Jenkins-to-GitLab authentication conveniently? Or just using GitLab credential directly.

References

• https://plugins.jenkins.io/gitlab-plugin/

Start with the GitLab plugin documentation linked in the issue and inspect the repository's DevOps integration entry points. Confirm supported GitLab versions, determine how Jenkins-to-GitLab authentication should be configured, and verify that pipeline build status can be sent back to GitLab.