Agent connection methods (SSH, JNLP) in Jenkins - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the agent launch method using SSH in Jenkins.

Jenkins

agent {
  label 'linux'
  [1] {
    host '192.168.1.10'
    credentialsId 'ssh-key'
  }
}

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

Ajnlp

Bdocker

Cssh

Dscript

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'jnlp' instead of 'ssh' for SSH connection.

The ssh block defines the SSH launch method for the Jenkins agent.

2fill in blank

medium

Complete the code to launch a Jenkins agent using JNLP.

Jenkins

node('agent-node') {
  stage('Run') {
    steps {
      [1] {
        url 'http://jenkins.example.com'
        tunnel 'jenkins.example.com:50000'
      }
    }
  }
}

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

AjnlpLauncher

BscriptLauncher

CdockerLauncher

DsshLauncher

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'sshLauncher' instead of 'jnlpLauncher' for JNLP connection.

The jnlpLauncher block configures the agent to connect via JNLP.

3fill in blank

hard

Fix the error in the Jenkins agent configuration to use the correct launch method.

Jenkins

agent {
  label 'build-agent'
  [1] {
    credentialsId 'agent-creds'
    host '10.0.0.5'
  }
}

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

Ajnlp

Bssh

Cdocker

Dscript

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'jnlp' instead of 'ssh' causes connection failure.

The ssh block is needed here to correctly configure the SSH launch method for the agent.

4fill in blank

hard

Fill both blanks to configure a Jenkins agent with SSH launch and specify the correct host and credentials.

Jenkins

agent {
  [1] {
    host '[2]'
    credentialsId 'ssh-key-123'
  }
}

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

Assh

Bjnlp

C192.168.100.50

D10.10.10.10

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'jnlp' instead of 'ssh' or invalid host IP.

The ssh block is used for SSH launch, and the host IP must be a valid address like 192.168.100.50.

5fill in blank

hard

Fill all three blanks to define a Jenkins agent using JNLP with the correct URL, tunnel, and launch method.

Jenkins

agent {
  [1] {
    url '[2]'
    tunnel '[3]'
  }
}

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

AjnlpLauncher

Bhttp://jenkins.local:8080

Cjenkins.local:50000

DsshLauncher

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'sshLauncher' instead of 'jnlpLauncher' or wrong URL/tunnel.

The jnlpLauncher is used for JNLP agents, with the Jenkins URL and tunnel port specified correctly.