Master-agent architecture in Jenkins - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a Jenkins agent node in the pipeline.

Jenkins

pipeline {
  agent { label '[1]' }
  stages {
    stage('Build') {
      steps {
        echo 'Building...'
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Amaster

Bagent

Cnode

Dslave

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'slave' which is deprecated terminology.

Using 'agent' which is a keyword, not a label.

Using 'node' which is a pipeline step, not a label.

The master label refers to the Jenkins master node where the pipeline runs if no specific agent is assigned.

2fill in blank

medium

Complete the code to run a stage on a specific Jenkins agent labeled 'linux'.

Jenkins

pipeline {
  agent none
  stages {
    stage('Test') {
      agent { label '[1]' }
      steps {
        echo 'Testing on Linux agent'
      }
    }
  }
}

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Awindows

Blinux

Cmac

Ddocker

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'windows' when the agent is Linux.

Using 'docker' which is not a label here.

Using 'mac' which is a different OS.

The label linux specifies the Jenkins agent node with that label to run the stage.

3fill in blank

hard

Fix the error in the Jenkins pipeline code to correctly allocate an agent node.

Jenkins

pipeline {
  agent [1]
  stages {
    stage('Deploy') {
      steps {
        echo 'Deploying application'
      }
    }
  }
}

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Alabel('any')

B'any'

Cany

D{ label: 'any' }

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around 'any' which causes syntax error.

Using a dictionary or function call which is invalid here.

The keyword any without quotes correctly tells Jenkins to run on any available agent.

4fill in blank

hard

Fill both blanks to define a Jenkins pipeline that runs on a specific agent and uses a shell step.

Jenkins

pipeline {
  agent { label '[1]' }
  stages {
    stage('Build') {
      steps {
        [2] 'echo Building on agent'
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Alinux

Bsh

Cbat

Dwindows

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'bat' which is for Windows agents.

Using 'windows' label with 'sh' step which causes errors.

The label linux selects the Linux agent, and sh runs a shell command on that agent.

5fill in blank

hard

Fill all three blanks to create a Jenkins pipeline that runs on an agent, checks out code, and runs a build command.

Jenkins

pipeline {
  agent { label '[1]' }
  stages {
    stage('Checkout') {
      steps {
        [2] scm
      }
    }
    stage('Build') {
      steps {
        [3] 'make build'
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Alinux

Bcheckout

Csh

Dbat

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'bat' on Linux agents causing errors.

Forgetting to use 'checkout' to get code.

Using wrong agent label.

The pipeline runs on a linux agent, uses checkout to get the source code, and runs the build command with sh.