Docker agent in Jenkinsfile - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify a Docker agent in the Jenkinsfile.

Jenkins

pipeline {
  agent {
    docker {
      image '[1]'
    }
  }
  stages {
    stage('Build') {
      steps {
        echo 'Building inside Docker container'
      }
    }
  }
}

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

Aalpine:3.12

Bnode:14

Cpython:3.8

Dubuntu:latest

Attempts:

3 left

💡 Hint

Common Mistakes

Using an invalid image name.

Forgetting to put the image name in quotes.

The docker agent requires an image name. Here, node:14 is used as the Docker image.

2fill in blank

medium

Complete the code to add a custom Docker argument in the Jenkinsfile.

Jenkins

pipeline {
  agent {
    docker {
      image 'python:3.8'
      args '[1]'
    }
  }
  stages {
    stage('Test') {
      steps {
        echo 'Running tests inside Docker'
      }
    }
  }
}

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

A--rm

B--privileged

C-d

D-v /tmp:/tmp

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid Docker arguments.

Not quoting the args string.

The args field lets you pass extra Docker run options. Here, -v /tmp:/tmp mounts a volume.

3fill in blank

hard

Fix the error in the Jenkinsfile Docker agent declaration.

Jenkins

pipeline {
  agent {
    docker {
      image '[1]'
    }
  }
  stages {
    stage('Deploy') {
      steps {
        echo 'Deploying inside Docker container'
      }
    }
  }
}

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

Anode:14

Bnode-14

Cnode14

Dnode/14

Attempts:

3 left

💡 Hint

Common Mistakes

Using colon after image key.

Using invalid image names.

The syntax for the Docker agent does not use a colon after image. The correct image name is node:14.

4fill in blank

hard

Fill both blanks to specify a Docker agent with a custom image and reuse the workspace.

Jenkins

pipeline {
  agent {
    docker {
      image '[1]'
      reuseNode [2]
    }
  }
  stages {
    stage('Build') {
      steps {
        echo 'Building with Docker agent'
      }
    }
  }
}

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

Amaven:3.6.3-jdk-11

Btrue

Cfalse

Dnode:16

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid image names.

Setting reuseNode to a string instead of boolean.

The image is set to maven:3.6.3-jdk-11 and reuseNode is set to true to reuse the workspace.

5fill in blank

hard

Fill all three blanks to define a Docker agent with image, args, and label.

Jenkins

pipeline {
  agent {
    docker {
      image '[1]'
      args '[2]'
      label '[3]'
    }
  }
  stages {
    stage('Test') {
      steps {
        echo 'Testing inside Docker container'
      }
    }
  }
}

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

Apython:3.9-slim

B-v /var/run/docker.sock:/var/run/docker.sock

Cdocker-agent

Dnode:12-alpine

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid Docker arguments.

Forgetting to quote the label string.

The Docker agent uses the python:3.9-slim image, mounts the Docker socket with -v /var/run/docker.sock:/var/run/docker.sock, and uses the label docker-agent.