1、編輯/etc/gitlab/gitlab.rb文件
### Gravatar Settings
# gitlab_rails['gravatar_plain_url'] = 'http://www.gravatar.com/avatar/%{hash}?s=%{size}&d=identicon'
gitlab_rails['gravatar_plain_url'] = 'http://cdn.libravatar.org/avatar/%{hash}?s=%{size}&d=identicon'
# gitlab_rails['gravatar_ssl_url'] = 'https://secure.gravatar.com/avatar/%{hash}?s=%{size}&d=identicon'
2、重新加載配置
gitlab-ctl reconfigure
參考：https://docs.gitlab.com/13.9/ee/administration/libravatar.html