本分分享 GitLab 降级的流程和注意事项。极狐GitLab 为 GitLab 的中文发行版，本文以私有化部署的极狐GitLab 为例来演示整个过程。
【极狐GitLab 推出 GitLab 老旧版本的专业升级服务【https://dl.gitlab.cn/cm33bsfv】，可以让 12.x、13.x、14.x、15.x 等老旧版本的升级平滑不出问题】
首先确定当前的版本信息，在实例 URL 后面加 /help就可以查看：
当前实例为 17.5.1-jh。我们降级到 17.4.0-jh。
降级之前需要做好备份，执行 gitlab-backup create即可开始备份。
# 开始备份
gitlab-backup create
2024-11-13 04:43:09 UTC -- Dumping database ...
2024-11-13 04:43:09 UTC -- Dumping PostgreSQL database gitlabhq_production ...
2024-11-13 04:43:44 UTC -- [DONE]
2024-11-13 04:43:44 UTC -- Dumping database ... done
2024-11-13 04:43:44 UTC -- Dumping repositories ...
{"command":"create","gl_project_path":"devsecops.wiki","level":"info","msg":"started create","pid":321034,"relative_path":"@groups/4f/c8/4fc82b26aecb47d2868c4efbe3581732a3e7cbcc6c2efb32062c08170a05eeb8.wiki.git","storage_name":"default","time":"2024-11-13T04:43:45.332Z"}
......太长删除......
Please back them up manually.
2024-11-13 04:43:46 UTC -- Backup 1731472989_2024_11_13_17.5.1-jh is done.
2024-11-13 04:43:46 UTC -- Deleting backup and restore PID file at [/opt/gitlab/embedded/service/gitlab-rails/tmp/backup_restore.pid] ... done
# 查看备份
ls -ltr /var/opt/gitlab/backups/
-rw------- 1 git git 379535360 Nov 13 04:43 /var/opt/gitlab/backups/1731472989_2024_11_13_17.5.1-jh_gitlab_backup.tar接着执行降级的步骤，大体为：
- 停止极狐GitLab
- 移除当前的软件包
- 安装降级之后的安装包
- 重新配置极狐GitLab
- 恢复备份
- 启动极狐GitLab
下面我们一步步演示在 ubuntu 22.04 上如何降级安装好的极狐GitLab 实例。
整体步骤
停止极狐GitLab
# If running Puma
sudo gitlab-ctl stop puma
# Stop sidekiq
sudo gitlab-ctl stop sidekiq移除当前的安装包
# If on Ubuntu: remove the current package
sudo dpkg -r gitlab-jh安装降级之后的安装包
可以执行 apt-cache madison gitlab-jh找到需要降级的对应安装包信息。本文选择降级到 17.4.0-jh.0。
接着执行安装命令进行低版本极狐GitLab 的安装：
apt install gitlab-jh=17.4.0-jh.0安装成功会显示如下界面：
重新配置极狐GitLab
执行 reconfigure命令重新配置极狐GitLab
# 重新配置实例
gitlab-ctl reconfigure
# 查看组件状态
gitlab-ctl status
run: alertmanager: (pid 323277) 151s; run: log: (pid 323259) 152s
run: gitaly: (pid 323275) 151s; run: log: (pid 323261) 152s
run: gitlab-exporter: (pid 323274) 151s; run: log: (pid 323270) 151s
run: gitlab-kas: (pid 323237) 152s; run: log: (pid 323217) 152s
run: gitlab-workhorse: (pid 323238) 152s; run: log: (pid 323218) 152s
run: logrotate: (pid 323314) 151s; run: log: (pid 323260) 152s
run: nginx: (pid 323315) 151s; run: log: (pid 323263) 152s
run: node-exporter: (pid 323258) 152s; run: log: (pid 323256) 152s
run: postgres-exporter: (pid 323273) 151s; run: log: (pid 323271) 151s
run: postgresql: (pid 323264) 152s; run: log: (pid 323257) 152s
run: prometheus: (pid 323272) 151s; run: log: (pid 323254) 152s
run: puma: (pid 323220) 152s; run: log: (pid 323219) 152s
run: redis: (pid 323223) 152s; run: log: (pid 323221) 152s
run: redis-exporter: (pid 323276) 151s; run: log: (pid 323262) 152s
run: sidekiq: (pid 323224) 152s; run: log: (pid 323222) 152s恢复数据
# 找到对应的备份文件，恢复数据
gitlab-backup restore BACKUP=1730349575_2024_10_31_17.4.0-jh
2024-11-13 06:09:17 UTC -- Unpacking backup ...
2024-11-13 06:09:18 UTC -- Unpacking backup ... done
2024-11-13 06:09:18 UTC -- Restoring database ...
2024-11-13 06:09:18 UTC -- Be sure to stop Puma, Sidekiq, and any other process that
connects to the database before proceeding. For Omnibus
installs, see the following link for more information:
http://jhma.jihulab.net/help/raketasks/backup_restore.html#restore-for-omnibus-gitlab-installations
......太长删除......
2024-11-13 06:13:09 UTC -- Warning: Your gitlab.rb and gitlab-secrets.json files contain sensitive data
and are not included in this backup. You will need to restore these files manually.
2024-11-13 06:13:09 UTC -- Restore task is done.
2024-11-13 06:13:09 UTC -- Deleting backup and restore PID file at [/opt/gitlab/embedded/service/gitlab-rails/tmp/backup_restore.pid] ... done接着访问极狐GitLab 实例，查看对应的版本即可
注意事项
对于极狐GitLab 的降级操作一定是要慎之又慎，而且要确保做好了数据备份。如果在整个过程中出现问题，可以寻求极狐GitLab 专业升级服务【https://dl.gitlab.cn/cm33bsfv】。