Take note for Jenkins

Install Jenkins with Docker

docker run -d -v jenkins_home:/var/jenkins_home -p 8080:8080 -p 50000:50000 --restart=on-failure jenkins/jenkins:lts-jdk17

Some plugins for .NET

1. Dotnet SDK (.NET Core and .NET 5.0)
2. MSBuild (.NET Framework & .NET Core)

This plugins only work agent node Jenkins run on Windows

Config global tool

• Access the url <ip:port>/manage/configureTools/
• In the section .NET SDK installations, we can add new SDK version here

Example Jenkinsfile with .NET 8

pipeline {
  agent any
  tools {
    dotnetsdk 'dotnet8'
  }

  stages {
    stage('Clean workspace') {
      steps {
        cleanWs()
      }
    }
    stage('Git Checkout') {
      steps {
        git branch: '<branch-name>', credentialsId: '<credential-id>', url: '<repo-url>'
      }
    }

    stage('Clean Project') {
      steps {
        echo "${env.BUILD_NUMBER}"
        script {
          sh 'export DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 && dotnet clean'
        }
      }
    }

    stage('Build Project') {
      steps {
        script {
          sh 'export DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 && dotnet build'
        }
      }
    }
  }
}

Add agent Linux node with Docker

1. Generating an SSH Key pair

ssh-keygen -f ~/.ssh/jenkins_agent_key

2. Create a Jenkins SSH credential

2.1 Go to your Jenkins dashboard
2.2 Manage Jenkins -> Credentials 2.3 Select the drop option Add Credentials from global item 2.4 Fill in the form

• Kind: SSH Username with private key
• id: jenkins
• description: the jenkins ssh key
• username: jenkins
• private key: select Enter directly and press Add button to insert the content of your private key file at ~/.ssh/jenkins_agent_key and then press the Create button 2.5 Creating your Docker agent on Linux
• Run the command (On Windows)

  docker run -d --rm --name=agent1 --network jenkins -p 22:22 `
  -e "JENKINS_AGENT_SSH_PUBKEY=[your-public-key]" `
  jenkins/ssh-agent:jdk17
  

Setup up the agent1 on Jenkins

• Go to your Jenkins dashboard
• Go to Manage Jenkins option in main menu
• Go to Manage Nodes and clouds item
• Go to New node option in side menu
• Fill the Node/agent name and select the type (e.g. Name: agent 1, Type: Permanent Agent)
• Fill in the fields:
  • Remote root directory (e.g.: /home/jenkins)
  • label (e.g.: agent1)
  • usage (e.g.: only build jobs with label expression…​)
  • Launch method; (e.g.: Launch agents by SSH)
  • Host; (e.g.: localhost or your IP address)
  • Credentials; (e.g.: jenkins )
  • Host Key verification Strategy; (e.g.: Manually trusted key verification …​ )
• Press the Save button