Gitlab日常备份和恢复

按照官方安装文档安装完成之后的/home/git目录结构如下，这里我大致翻译官方的内容，部分加上自己的话，英语功力捉急，请见谅

|-- home 
| |-- git 
| |-- .ssh 
| |-- gitlab 
| |-- gitlab-satellites 
| |-- gitlab-shell 
| |-- repositories

* `/home/git/.ssh` - ssh设定的目录. gitlab-shell管理着其中的 `authorized_keys`. 
* `/home/git/gitlab` - GitLab核心部分 
* `/home/git/gitlab-satellites` - 可以视为临时目录，通过web ui的提交请求文件以及检出版本库都会存放在这个位置 
* `/home/git/gitlab-shell` - gitlab的核心插件组件. 包括ssh协议克隆和其他一些功能. 
* `/home/git/repositories` - 原始版本库的所有项目组织的名称空间，也就是所有仓库的存储位置，所以这个目录里的数据非常重要，注意备份 **这是项目的关键数据. Keep a backup**

*Note: gitlab-satellites 和 repositories的路径都被定义在gitlab中的 `config/gitlab.yml` 和 gitlab-shell.* 中的`config.yml`

创建为所有版本库的存档，就是备份啦. 存储路径在gitlab中的 `config/gitlab.yml` 
文件命名 `[TIMESTAMP]_gitlab_backup.tar`.

``` 
bundle exec rake gitlab:backup:create RAILS_ENV=production 
```

类似如下:

``` 
Dumping database tables: 
- Dumping table events... [DONE] 
- Dumping table issues... [DONE] 
- Dumping table keys... [DONE] 
- Dumping table merge_requests... [DONE] 
- Dumping table milestones... [DONE] 
- Dumping table namespaces... [DONE] 
- Dumping table notes... [DONE] 
- Dumping table projects... [DONE] 
- Dumping table protected_branches... [DONE] 
- Dumping table schema_migrations... [DONE] 
- Dumping table services... [DONE] 
- Dumping table snippets... [DONE] 
- Dumping table taggings... [DONE] 
- Dumping table tags... [DONE] 
- Dumping table users... [DONE] 
- Dumping table users_projects... [DONE] 
- Dumping table web_hooks... [DONE] 
- Dumping table wikis... [DONE] 
Dumping repositories: 
- Dumping repository abcd... [DONE] 
Creating backup archive: $TIMESTAMP_gitlab_backup.tar [DONE] 
Deleting tmp directories...[DONE] 
Deleting old backups... [SKIPPING] 
```

### 利用备份文件恢复

``` 
bundle exec rake gitlab:backup:restore RAILS_ENV=production 
```

选项:

``` 
BACKUP=timestamp_of_backup (required if more than one backup exists) 
```

类似这样:

``` 
Unpacking backup... [DONE] 
Restoring database tables: 
-- create_table("events", {:force=>true}) 
-> 0.2231s 
[...] 
- Loading fixture events...[DONE] 
- Loading fixture issues...[DONE] 
- Loading fixture keys...[SKIPPING] 
- Loading fixture merge_requests...[DONE] 
- Loading fixture milestones...[DONE] 
- Loading fixture namespaces...[DONE] 
- Loading fixture notes...[DONE] 
- Loading fixture projects...[DONE] 
- Loading fixture protected_branches...[SKIPPING] 
- Loading fixture schema_migrations...[DONE] 
- Loading fixture services...[SKIPPING] 
- Loading fixture snippets...[SKIPPING] 
- Loading fixture taggings...[SKIPPING] 
- Loading fixture tags...[SKIPPING] 
- Loading fixture users...[DONE] 
- Loading fixture users_projects...[DONE] 
- Loading fixture web_hooks...[SKIPPING] 
- Loading fixture wikis...[SKIPPING] 
Restoring repositories: 
- Restoring repository abcd... [DONE] 
Deleting tmp directories...[DONE] 
```

### 配置计划任务

``` 
cd /home/git/gitlab 
sudo -u git -H editor config/gitlab.yml # 开启多久自动备份的时间 
sudo -u git crontab -e # git用户的计划任务 
```

增加如下的条目:

``` 
# 每天凌晨2点进行一次全备份 
0 2 * * * cd /home/git/gitlab && PATH=/usr/local/bin:/usr/bin:/bin bundle exec rake gitlab:backup:create RAILS_ENV=production 
```