Jenkins和pipeline

Jenkins

https://jenkins.io/index.html

The leading open source automation server, Jenkins provides hundreds of plugins to support building, deploying and automating any project.

http://www.cnblogs.com/itech/archive/2011/11/23/2260009.html

Jenkins的突出特点：

开源免费；

跨平台，支持所有的平台；

master/slave支持分布式的build；

web形式的可视化的管理页面；

安装配置超级简单；

tips及时快速的帮助；

已有的200多个插件；

Pipeline

https://jenkins.io/doc/book/pipeline/

Jenkins Pipeline is a suite of plugins which supports implementing and integrating continuous delivery pipelines into Jenkins. Pipeline provides an extensible set of tools for modeling simple-to-complex delivery pipelines "as code" via the Pipeline DSL. ^[1]

Typically, this "Pipeline as Code" would be written to a Jenkinsfile and checked into a project’s source control repository, for example:

pipeline {
    agent any 

    stages {
        stage('Build') {
            steps {
                sh 'make'
            }
        }
        stage('Test'){
            steps {
                sh 'make check'
                junit 'reports/**/*.xml'
            }
        }
        stage('Deploy') {
            steps {
                sh 'make publish'
            }
        }
    }
}

典型场景： devops 下载 编译 测试 部署

Parallelism and Distributed Builds with Jenkins

https://www.cloudbees.com/blog/parallelism-and-distributed-builds-jenkins

   parallel (
     "stream 1" : { ... things ...  },
     "stream 2" : { ... things in parallel ... }
   )

https://issues.jenkins-ci.org/browse/JENKINS-33185

for (int i=0; i< 2; ++i) {
  stage "Stage #"+i
  print 'Hello, world $i!'
}

stage "Stage Parallel"
def branches = [:]
for (int i = 0;  i < numHelloMessages.toInteger();  i++) {
  branches["split \$ \{i\}"] = {
    stage "Stage paralle l - #" + i
    node('remote') {
     echo  'Starting sleep'
     sleep 10
     echo  'Finished sleep'
    }
  }
}
parallel branches

Jenkins file样例库

https://github.com/jenkinsci/pipeline-examples/blob/master/pipeline-examples/jobs-in-parallel/jobs_in_parallel.groovy

// in this array we'll place the jobs that we wish to run
def branches = [:]

//running the job 4 times concurrently
//the dummy parameter is for preventing mutation of the parameter before the execution of the closure.
//we have to assign it outside the closure or it will run the job multiple times with the same parameter "4"
//and jenkins will unite them into a single run of the job

for (int i = 0; i < 4; i++) {
  def index = i //if we tried to use i below, it would equal 4 in each job execution.
  branches["branch${i}"] = {
//Parameters:
//param1 : an example string parameter for the triggered job.
//dummy: a parameter used to prevent triggering the job with the same parameters value. this parameter has to accept a different value
//each time the job is triggered.
    build job: 'test_jobs', parameters: [[$class: 'StringParameterValue', name: 'param1', value:
      'test_param'], [$class: 'StringParameterValue', name:'dummy', value: "${index}"]]
    }
}
parallel branches