1. Basic Concepts GitLab-CI: the continuous integration system provided by GitLab. It manages the build status of a project and runs build tasks through GitLab Runner. GitLab-Runner: used to execute build tasks. The script portion of .gitlab-ci.yml is run by GitLab-Runner. .gitlab-ci.yml: a file in the root directory of a git project that records a series of stages and execution rules.

1. Introduction GitLab is an open-source application developed with Ruby on Rails. It implements self-hosted Git project repositories, and public or private projects can be accessed through a web interface. It has features similar to GitHub, and can browse source code, manage defects and comments. It can manage team access