The Devops Handbook 读书笔记02 PartI

今天开始看PartI。
PartI的内容主要是，回顾历史上帮助引导DevOps发展的几个运动。介绍构成一个成功的DevOps组织必备的三个基础且主要的原则:流程、反馈和持续学习的原则。

今天看到了一些术语解释，以及一些Devops的发展历史。如下：

1. Flow：技术价值流

项目交付的技术价值流是从开发到运维到客户的

2. Feedback：反馈

每个stage都要有反馈，即结果，自动化测试的结果，冒烟测试的结果，部署到QA环境的结果，我们可以依据这个结果，决定是否进入下一步，明确问题出在哪一步。

3. Continual Learning and Experimentation ：持续的学习和实验

不断的学习，在科学的指导下，不断的改进现有的组织。

We describe value streams, how DevOps is the result of
applying Lean principles to the technology value stream, and the Three Ways:
Flow, Feedback, and Continual Learning and Experimentation.

The principles of Flow, which accelerate the delivery of work from
Development to Operations to our customers
The principles of Feedback, which enable us to create ever safer systems of
work
The principles of Continual Learning and Experimentation foster a high-trust
culture and a scientific approach to organizational improvement risk-taking
as part of our daily work

DevOps是如何出现的？

最初有人思考这样一个问题，如何令开发和运维建立合作，遂提出以下观点：
1.在开发人员和运维人员之间创建共享的目标
2.使用持续的集成实践使部署成为每个人日常工作的一部分
因为思考，所以进步。
于是，
2009. “DevOps” 这个术语被创造出来了。

at the 2009 Velocity conference, John Allspaw and Paul Hammond gave
the seminal “10 Deploys per Day: Dev and Ops Cooperation at Flickr”
presentation, where they described how they created shared goals between Dev
and Ops and used continuous integration practices to make deployment part of
everyone’s daily work. According to first hand accounts, everyone attending the
presentation immediately knew they were in the presence of something profound
and of historic significance.
Patrick Debois was not there, but was so excited by Allspaw and Hammond’s
idea that he created the first DevOpsDays in Ghent, Belgium, (where he lived) in 2009.
There the term “DevOps” was coined.

这里还提到了一个我熟悉的家伙“Pipeline”，了不起，2006年有人提出，使用deloyment pipeline来确保代码和基础设施始终处于可部署状态，并且所有merge到trunk的代码都可以安全地部署到生产环境中。

which defined the role of a “deployment pipeline” to ensure that code
and infrastructure are always in a deployable state, and that all code checked in
to trunk can be safely deployed into production.

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