CI/CD System and gerrittrigger keypoints.

CI/CD System

https://www.redhat.com/en/topics/devops/what-is-ci-cd#ci/cd-tools

CI关注开发阶段

CD -- Delivery  对应版本的自动化发布， 发布到制品库， 但是部署可能后续为手动

CD -- Deployment 包括版本的自动化发布， 同时也包括自动化部署

https://www.geeksforgeeks.org/what-is-ci-cd/

面向开发者的CI过程

面向版本的 CD / CD 过程

CI输出的结果，需要进行 ACC 测试， 然后打包到制品库。

CD 选定待部署的版本之后， 部署到产品环境， 需要进行 冒烟测试。

Gerrit-Trigger

https://plugins.jenkins.io/gerrit-trigger/

开发者提交代码，未何如库之前， 进行模块单元等测试 --- 对应 Patchset Created事件

开发者提交代码， 何如库之后， 需要进行模块功能测试 --- 对应 Change Merged事件

版本确定，使用 git tag打上版本号， 需要进行版本测试（ACC测试） --- 对应 Ref Updated事件

https://reviews.mahara.org/Documentation/config-hooks.html#_ref_updated

Gerrit Code Review - Hooks

各种事件说明

Code Sample --- FOR COMMIT CI

https://github.com/berniehuang/autotest/blob/9384b5cbe13a71e12fddfe952cd9c4e275917eeb/Jenkinsfile

pipeline {
  agent any
  triggers {
    gerrit(
      serverName: 'gerrit.office.iauto.com',
      gerritProjects: [[
        compareType: 'PLAIN',
        pattern: 'All-Users',
        branches: [[ compareType: 'PLAIN', pattern: 'master' ]]
      ]],
      triggerOnEvents: [
        changeMerged(),
        patchsetCreated(excludeDrafts: false, excludeNoCodeChange: false, excludeTrivialRebase: false)
      ]
    )
  }
  
  stages {
    stage('Install') {
      when {
        expression {
          BUILD_EXPRESSION
        }

      }
      steps {
        echo 'Good'
      }
    }

    stage('Build') {
      parallel {
        stage('build') {
          steps {
            echo 'Hello World'
            sh 'ls -l'
          }
        }

        stage('deploy') {
          steps {
            echo 'deploy'
            sh 'pwd'
          }
        }

        stage('compile') {
          steps {
            echo 'compile'
            sh 'echo $PATH'
          }
        }

      }
    }

    stage('Run') {
      parallel {
        stage('Run') {
          steps {
            echo 'running'
            timestamps()
          }
        }

        stage('Startup') {
          steps {
            echo 'startup'
          }
        }

      }
    }

    stage('Test') {
      steps {
        echo 'test'
      }
    }

    stage('Mail') {
      steps {
        mail(subject: 'Test', body: 'hello')
        sh 'ls -l'
        echo 'send mail'
      }
    }

  }
  environment {
    BUILD_EXPRESSION = false
  }
}

Code Sampe --- for CRON

https://github.com/Hiristic/Jenkins-global-lib/blob/717996ab3b327f0bfcd6386bc760289830477c16/jenkinsfiles/Demo/demo-28-Triggers.groovy

//This is how to handle faults in stages and on pipeline level
pipeline {
  agent {label 'master'}
  triggers {
    // On Gerrit patchset creation
    //gerrit customUrl: '', gerritProjects: [[branches: [[compareType: 'REG_EXP', pattern: '.*']], compareType: 'PLAIN', disableStrictForbiddenFileVerification: false, pattern: '.*']], serverName: 'gerrit', triggerOnEvents: [patchsetCreated()]

    // On changes in Git repo. Can be used if Gerrit is not available or due to lazyness
    //pollSCM '* * * * *'

    //Every minute
    //cron{"* * * * *"}
    
    //Conditional cron
    //cron(JENKINS_URL.contains("jenkins-staging") ? "@daily" : "")
    //cron(JENKINS_URL.contains("jenkins-production") ? "H 0-7 * * *" : "")


    // After others jobs are done
     upstream 'demo-00-base-structure'
  }

  stages {
    stage('On master') {
      steps {
        script {
          cleanWs()
          echo "Build started: "+RUN_DISPLAY_URL
          echo "Running"
        }
      }
    }
  }
}

TAG EVENT LISTEN

https://stackoverflow.com/questions/29742847/jenkins-trigger-build-if-new-tag-is-released?noredirect=1&lq=1

Set refspec to: +refs/tags/*:refs/remotes/origin/tags/*

branch specifier: **

https://stackoverflow.com/questions/54930947/groovy-job-dsl-for-triggering-jenkins-based-on-new-release-tags?rq=1

checkout([$class: 'GitSCM', branches: [[name: '**']], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[credentialsId: 'yourAuthHere', refspec: '+refs/tags/*:refs/remotes/origin/tags/*', url: 'yourGitRepoLocationHere']]])

GIT TAGGED PROJECT

https://github.com/oleg-nenashev/demo-jenkins-config-as-code/tags

GIT TAG BASIC

https://git-scm.com/book/en/v2/Git-Basics-Tagging

https://www.toolsqa.com/git/github-tags/