问题
The one specified in here in the Configuring the Jenkins server section.
回答1:
In brief: it's Yours GitLab API Endpoint without api/v4. If you want to use Webhooks, or GitLab OAuth Plugin it very important field.
回答2:
if you use gitlab as global type https://gitlab.com/. but if you have other domain that use with gitlab, should use https://gitlab.your-domain-name.com. it work fine for me, just add https://gitlab.com because my project store on gitlab.com as simple. :D
来源：https://stackoverflow.com/questions/51382771/what-does-gitlab-host-url-means-in-configuring-gitlab-in-jenkins