What is Jenkins Pipeline?

Jenkins Pipeline (or simply "Pipeline" with a capital "P") is a suite of plugins which supports implementing and integratingcontinuous delivery pipelinesinto Jenkins

Acontinuous delivery pipeline@H_301_23@is an automated expression of your process for getting software from version control right through to your users and customers. Every change to your software (committed in source control) goes through a complex process on its way to being released. This process involves building the software in a reliable and repeatable manner,as well as the progression of the built software (called a "build") through multiple stages of testing and deployment.

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Typically,the definition of a Jenkins Pipeline is written into a text file (called aJenkinsfile) which in turn is checked into a project’s source control repository.[2]This is the foundation of "Pipeline-as-Code"; treating the continuous delivery pipeline a part of the application to be versioned and reviewed like any other code. Creating aJenkinsfileprovides a number of immediate benefits:

• Automatically create Pipelines for all Branches and Pull Requests

• Code review/iteration on the Pipeline

• Audit trail for the Pipeline

• Single source of truth[3]for the Pipeline,which can be viewed and edited by multiple members of the project.

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初试Jenkins2.0 Pipeline持续集成

Pipeline的几个基本概念：

• Stage: 阶段，一个Pipeline可以划分为若干个Stage，每个Stage代表一组操作。注意，Stage是一个逻辑分组的概念，可以跨多个Node。

• Node: 节点，一个Node就是一个Jenkins节点，或者是Master，或者是Agent，是执行Step的具体运行期环境。

• Step: 步骤，Step是最基本的操作单元，小到创建一个目录，大到构建一个Docker镜像，由各类Jenkins Plugin提供。

，Jenkins 2.0的精髓是Pipeline as Code，是帮助Jenkins实现CI到CD转变的重要角色。什么是Pipeline，简单来说，就是一套运行于Jenkins上的工作流框架，将原本独立运行于单个或者多个节点的任务连接起来，实现单个任务难以完成的复杂发布流程。Pipeline的实现方式是一套Groovy DSL，任何发布流程都可以表述为一段Groovy脚本，并且Jenkins支持从代码库直接读取脚本，从而实现了Pipeline as Code的理念。

http://blog.csdn.net/aixiaoyang168/article/details/72818804

Jenkins 2.0

• Pipeline as Code
  通过使用Groovy DSL来描述一套运行于Jenkins上的工作流程，将原本独立运行于单个或者多个节点的任务连接起来，实现单个任务难以完成的复杂发布流程。并且，Jenkins支持从代码库直接读取脚本。
  

• 全新的开箱体验和UI可用性提升
  Jenkins 1.XXX 安装默认是开放所有权限，因为安全性存在隐患。而Jenkins 2.0则加强了安全管理。
  

• 完全向后兼容
  Jenkins官方公布是完全向后兼容的，所以在Jenkins 1.XXX版本的功能都可以使用，但插件还是得自己验证

这套持续交付的方案，最大的两个特性在于，一，使用了Jenkins Pipeline Project，通过Jenkinsfile脚本简化整个配置过程，增加了artifacts存储，加强了结果展示,UT结果看板以及stage时间统计。二，Dynamic slave，提供了动态生成slave，执行Jenkins job，销毁slave的能力。

使用阿里云容器服务Jenkins 2.0实现持续集成之Pipeline篇(updated on 2016.12.23)

https://yq.aliyun.com/articles/64970

https://github.com/AliyunContainerService/jenkins-slaves