January 2023
Intermediate to advanced
458 pages
14h 16m
Chinese
Content preview from 可编程网络自动化
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372
｜
第
10
章
CI
很容易应用于网络自动化（接下来会介绍），但是
CD
就要多些考量了。本章余下部分
可能会模糊
CI
和
CD
在网络自动化方面的界限，所以请记住以下两件事。
•
我要部署
什么
？
•
我要把它部署到
什么地方
/
谁那里
？
以上是要解决的重要问题，因为这决定了你的交付模式。例如，某些网络团队可能会使用
内部
Python
应用程序执行所有自动化操作
。这非常简单，因为他们本质上就是基础设施团
队中的软件开发工坊（
software development shop
）。
还要考虑典型的网络自动化示例：将某种配置工件（比如一些
Y
AML
文件）放入
Git
仓
库，在使用
Ansible
等工具调用它之前
，让
CI/CD
管道对其进行一些基本的健全性检查，
使得生产环境中的网络设备发生实际和即时的改动。对有些组织来说，这也许可行，但就
像软件开发团队将每个软件补丁立即部署到生产环境中，而这并未必总是我们想要的。
也许可以考虑将这些变更持续交付到“类生产”环境（“
staging
”
environment
）
，每当企业
要求把这些变更最终部署到生产环境中时，就可以将其从类生产环境（希望已经在其中经
过了测试）中移出。在撰写本章时，许多网络厂商已经得知我们希望能够提供其平台的虚
拟映像的诉求，所以这要比以前容易多了。
尽管所有这些虚拟设备都非常适合测试自动化，但实际上并非所有虚拟设备
都能够承载生产环境网络流量。对此，请参考厂商的文档说明。
还得考虑回滚过程。你是否定期获取“生产环境”
Git
仓库中的配置并使用其覆盖当前的
“生产环境”配置，或者至少是对两者进行比较 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.