Monitoring Jenkins health - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check Jenkins service status using systemctl.

Jenkins

systemctl [1] jenkins

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

Astatus

Bstart

Cstop

Drestart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' instead of 'status' will try to start Jenkins instead of checking it.

Using 'stop' will stop Jenkins, which is not what we want here.

The status command shows the current state of the Jenkins service.

2fill in blank

medium

Complete the Jenkins CLI command to get the current system health report.

Jenkins

java -jar jenkins-cli.jar -s http://localhost:8080 [1]

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

Awho-am-i

Bbuild

Chealth-report

Drestart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'build' runs a job, not health check.

Using 'restart' restarts Jenkins, not reports health.

The health-report command fetches Jenkins system health information.

3fill in blank

hard

Fix the error in the curl command to get Jenkins health API JSON output.

Jenkins

curl -s http://localhost:8080/[1]/api/json

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

Ahealth

Bcomputer

Cqueue

Djob

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'job' returns job info, not health.

Using 'computer' returns node info, not health.

The health endpoint provides Jenkins health status in JSON format.

4fill in blank

hard

Fill both blanks to create a Jenkins pipeline step that checks health and fails if unhealthy.

Jenkins

stage('Check Health') {
  steps {
    script {
      def health = sh(script: 'curl -s http://localhost:8080/[1]/api/json', returnStdout: true).trim()
      if (!health.contains('[2]')) {
        error('Jenkins health check failed!')
      }
    }
  }
}

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

Ahealth

Bhealthy

Cunhealthy

Dcomputer

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'computer' instead of 'health' for the endpoint.

Checking for 'unhealthy' instead of 'healthy' causes wrong logic.

The script fetches health JSON from the health endpoint and checks if it contains the word healthy. If not, it fails the build.

5fill in blank

hard

Fill all three blanks to create a Jenkins Groovy script that prints the health report summary.

Jenkins

import jenkins.model.*

def instance = Jenkins.getInstance()
def healthReport = instance.get[1]().get[2]()
println("Health Summary: " + healthReport.[3])

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

AInstance

BOverallHealth

Cdescription

DComputer

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Computer' instead of 'Instance' for the Jenkins object.

Trying to print the whole object instead of its description.

The script gets the Jenkins instance, then calls getOverallHealth() to get the health report, and prints its description summary.