Google Compute Engine VM 上的 Ubuntu do-release-upgrade

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我可以运行 do-release-upgrade 来升级我的 Ubuntu Google Compute Engine 虚拟机吗？

VM 镜像版本现在是 Ubuntu 14.04。
我想升级到 Ubuntu 16.04 或 18.04。

Answer 1

是的，您可以，根据以下 document也是首选方式，因为，

The ubuntu-release-upgrader package, provides do-release-upgrade, and is designed to handle quirks and transitions when moving between releases of Ubuntu.

这是因为 Ubuntu 开发人员不支持 Debian 方式。

如果您按照正确的步骤操作，您将看到类似于以下内容的消息:

System upgrade is complete.

Restart required 

To finish the upgrade, a restart is required. 
If you select 'y' the system will be restarted. 

**Continue [yN] y**
=== Command detached from window (Fri Feb 22 17:30:44 2019) ===
=== Command terminated normally (Fri Feb 22 17:30:54 2019) ===Connected, host 
fingerprint: ssh-rsa 0 C5:6B:DD:78:D2:BB:89:5B:A8:C7:AC:E7:32:52:F7:F2:F3:8D:DE:91:B6:F3:2D:DE:06:2A:EA:9A:50:34:A2:B5
Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.4.0-142-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

在 Google 图片中 document page它解释说，

If your instances run Ubuntu releases that are no longer supported,you are allowed to upgrade to a supported Ubuntu release.

正如@Martin 提到的，还有一件事。在升级镜像版本之前创建磁盘快照始终是一个好主意。而如果你不熟悉do-release-upgrade全流程，下面 article将帮助您入门。