编辑 /etc/gitlab/gitlab.rb

 # letsencrypt['enable'] = nil
并更改
letsencrypt['enable'] = false

重新加载配置 重启gitlab生效

gitlab-ctl reconfigure

配置成自己的证书

external_url 'http://gitlab.example.com'开启以下3向即可
nginx['redirect_http_to_https'] = true
nginx['ssl_certificate'] = "/etc/gitlab/exchangs.top.pem"
nginx['ssl_certificate_key'] = "/etc/gitlab/exchangs.top.key"

重新配置 &&　重启GitLab

 gitlab-ctl reconfiguregitlab-ctl restart