Jenkins

1. 1

   What Is Jenkins

   Open the careers page of almost any bank, telecom, hospital IT department, or game studio that has been running software for more than a decade, and...

   History and Hudson forkWhy Jenkins is still everywhereController and agentsPlugin ecosystemJenkins vs GitLab CI vs GitHub Actions
   20 min
2. 2

   Your First Freestyle Job

   You have read about what Jenkins is and why it stuck around. None of that matters until you have actually watched Jenkins clone a repository, run a...

   New ItemFreestyle projectSource Code ManagementExecute shell build stepBuild NowConsole output
   25 min
3. 3

   Your First Declarative Pipeline

   Go back to the freestyle job you built in the last lesson and imagine six months have passed. The shell script grew from three lines to eighty. A...

   Pipeline job typeJenkinsfileAgent anyStages and stepsDeclarative vs scripted
   30 min
4. 4

   Stages, Steps, and Post Blocks

   Your first pipeline was one sh line, and it worked. A real one is a checkout, a build, a test and a package, and the moment you have four of those in...

   Multiple stagesSh and echoArchiveArtifactsJunit stepPost alwaysPost success and failure
   30 min
5. 5

   Artifacts and Test Results

   The build went red at 2am and somebody has to work out why. They open the job, and the only thing on the page is a link to a console log: eleven...

   ArchiveArtifactsJunit stepPublishHTMLTest trend graphFingerprinting
   25 min
6. 6

   Environment and Credentials

   Your pipeline needs to push an image to a registry, and the registry wants a password. The quickest thing that works is to paste it into the...

   Environment blockCredentials() helperJenkins credentials storeUsername with passwordSecret textSSH key+1
   30 min
7. 7

   Parallel and Matrix Builds

   Five stages, three minutes each, and the pipeline takes fifteen minutes. That number is not just annoying, it changes behaviour: people stop waiting...

   Parallel inside a stageFan-out fan-inMatrix blockAxes and axisExcludes
   30 min
8. 8

   Agents and Docker

   The build passed on Tuesday and failed on Wednesday, with no change to the code. It turns out Tuesday's build landed on the agent where somebody had...

   Agent any vs agent noneAgent labelsAgent dockerAgent kubernetesPer-stage agents
   30 min
9. 9

   Triggers and Schedules

   A pipeline that only runs when somebody clicks Build Now is not continuous integration, it is a button. The value of CI comes from the builds nobody...

   Triggers blockCron syntax with HPollSCMMultibranch PipelineGitHub and GitLab webhooks
   25 min
10. 10

    Shared Libraries

    Open three Jenkinsfiles in your organisation and you will find the same fifteen lines of Groovy in all of them. The Slack notifier. The "build and...

    Vars folderSrc folder@Library annotationCustom stepsGlobal utilities
    30 min
11. 11

    Capstone: Pipeline as Code for a Node.js App

    Time to wire everything together. You are going to write one Jenkinsfile that does the full job for a small Node.js project: checkout, install, lint...

    Full JenkinsfileCheckoutParallel lint and testDocker build and pushCredentialsJunit results+1
    45 min

Every lesson, quiz, and tutor reply renders in your language. The AI tutor matches the language you ask in.

See how hiring teams interview engineers on Jenkins, in production-like environments.