生成 Gitlab EE 许可证

本文基于 Gitlab 官方套件生成 Gitlab EE 许可证。依赖于 Ruby 环境，请安装好 Ruby 环境后再执行脚本。

1. Gitlab 官方证书套件 , Copy 官方套件 README.md 中 Usage 里的脚本内容，保存为 gitlab-ee-license.rb 脚本文件。
2. 命令行输入 gem install gitlab-license 安装模块依赖。
3. 修改脚本文件，在第一行加入

   require 'openssl'
   require 'gitlab/license'
   

4. 修改脚本文件，搜索 license.licensee 将以下内容修改为你的组织信息：

   license.licensee = {
     "Name"    => "Douwe Maan",
     "Company" => "GitLab B.V.",
     "Email"   => "douwe@gitlab.com"
   }
   

5. 修改脚本文件，搜索 license.restrictions 修改以下内容：

   license.restrictions  = {
     # The maximum allowed number of active users.
     # Not required.
     # active_user_count: 10000
     plan: 'ultimate'
     # We don't currently have any other restrictions, but we might in the future.
   }
   

   active_user_count 为许可证可用人数，plan 为许可证计划类型

6. 修改脚本文件， 将以下内容的时间修改为实际需要的时间

   license.starts_at         = Date.new(2015, 4, 24)
   # The date the license expires. 
   # Not required, to allow lifetime licenses.
   license.expires_at        = Date.new(2016, 4, 23)
   
   # The below dates are hardcoded in the license so that you can play with the
   # period after which there are "repercussions" to license expiration.
   
   # The date admins will be notified about the license's pending expiration. 
   # Not required.
   license.notify_admins_at  = Date.new(2016, 4, 19)
   
   # The date regular users will be notified about the license's pending expiration.
   # Not required.
   license.notify_users_at   = Date.new(2016, 4, 23)
   
   # The date "changes" like code pushes, issue or merge request creation 
   # or modification and project creation will be blocked.
   # Not required.
   license.block_changes_at  = Date.new(2016, 5, 7)
   

7. 修改脚本文件，搜索 active_user_count = User.active.count 修改为 active_user_count = 1
8. 命令行执行脚本，输出一下内容则表示生成许可证成功：

   Exported license:
   eyJkYXRhIjoiR2U1T2dYMGUzYjJNNlMyQWZOeVZ5YzJXNTdINFRSZ2xRdURM
   azFNRmYzM05LVkRuU2loRXUyUzdLZithXG5yRXdtS0lGcnN0WHVJVllMZ2cx
   WmRRUjFXY3JoQVNoeWFPMFpLOGFqdzhJU1JzM0V1ZndERTVUUllwZlJcbmF4
   OWNmQmhrdjFNR0ZESkNNVWVJLzBWR3llL0ZlcmNXZTdRcUJXV3BMYVBlTUgy
   bTVTdkk5V0J1UktRN1xuUlBjQ0lHTmZmSzdqMkVVUDJ2RFpvK0lSZXNNYkR0
   bFUwbVc5czhqZnZydENsM1p1dkQ2QjBuclVkcjVoXG5Xb1pWMnJxRnFLSGpq
   aVg5QkZOc1FoRzJGRS8rSlVvUGJZeEZnVDVkcDkzd3ViTngzOVg5WmZhb0xR
   N1VcbktSaHJtOGh3YVpBNm5VSEVTbTNDVDVDRDc0NnFsMlo3RWl6M0ZSM2Jr
   UHo2c0FycmMzejR1NWQ1bmFZTlxuTTZ6YWc4MTI2NkU2azVJL01YNjFQNUIr
   XG4iLCJrZXkiOiJnN2E4Ny9SQUJObkxWK2gyWHFSOFRrNXBEbVlMc3VaUHgy
   RmFnU0lKNU94TGV5RG9PZ3VvYkRqaFlMUXRcbjZPVHhad1RyeDJXcC9BZnNY
   ZmtMeGJxSU52bzNIVm5yTkpSY29FVzg2MithVkVlUHZhZXExNzUxYU14QVxu
   T3V6UnBNYUY4bmRsMk5RaFUyQWpJU1FYRTVFdEdZekhMYlJJbHZsbEYzUFhP
   cGFSc1lVRkcvRlNxN1pnXG44SFZzWmZwdGlqcTA4NGlFa0E5NDVrRzVSWmJO
   dkR3K2FsbWFUTWFGeCtWQmkzUHVySWpLZVF1c3VRYkRcbmtLMXl5U2VmTnYx
   UEd4UHZzSjZlOVFBNmNXaFo2OUIybVRoaHNHTEhzdXdqaG1LQTV2Z1Fjeksw
   K2VmWVxuTHErT2xKUER0U1k4d0g2NkdvVC8weGVRaXNFWDMxL2EraGNBazh1
   TlhRPT1cbiIsIml2IjoiSis0K0d5SkZsRG5paFVWVWtzSXZHUT09XG4ifQ==
   Imported license:
   #<Gitlab::License:0x00000000056e1a68>
   This instance of GitLab Enterprise Edition is licensed to:
   Name: Douwe Maan
   Company: GitLab B.V.
   Email: douwe@gitlab.com
   The license will expire on 2021-08-23
   

9. 脚本目录下会生成三个文件，license_key、license_key.pub、GitLabBV.gitlab-license。

   license_key 为私钥，license_key.pub 为公钥，GitLabBV.gitlab-license 为 license 文件

10. 将公钥文件覆盖替换 Gitlab 自带的公钥，目录为 /opt/gitlab/embedded/service/gitlab-rails/.license_encryption_key.pub，然后登录 Gitlab 上传 license 文件即可