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Let's start!
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History
lesson
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A bit of history: Hudson
Work started in the summer of 2004 at Sun by Kohsuke Kawaguchi.
First release: February 2005.
In May, 2008, Hudson won the Duke's Choice Award in the Developer
Solutions category.
In 2010, Sun is acquired by Oracle... discussions, negotiations.
Kohsuke Kawaguchi leaves Oracle.
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6.
A bit of history: Jenkins
In 2010, majority of Hudson's community votes for forking and name
changing.
Initial release of Jenkins: 2nd of February, 2011.
Oracle still supports and develops Hudson.
Around 2010­2011, CloudBees is created and declared Jenkins as its
backbone product.
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7.
Pipelines in
Jenkins
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8.
Steps
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Steps
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Job DSL
job(jobName) {
scm {
git("git://github.com/project.git", branchName)
}
steps {
maven("clean test")
maven("install")
}
}
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Gradle + Job DSL
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Gradle + Job DSL
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Build flow
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Build flow
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Build flow
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Build flow
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Build flow
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Build flow
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Groovy Postbuild
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Groovy Postbuild
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Groovy Postbuild
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It still works,
but...
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Future ahead!
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Pipeline­as­
code
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Jenkinsfile
node {
stage('build') {
}
stage('test') {
}
stage('deploy') {
}
}
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Jenkinsfile
pipeline {
agent any
stages {
...
}
}
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Stage view
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New job types
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Folder types
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Pipeline script aka Jenkinfile
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Questions in 2016
Why not Job DSL?
Why not extending Build Flow?
Why no integration with existing plug­ins?
Why? Why? Why?
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Problems in 2016
No good documentation
No easy to use examples and tutorials
User interface is, well,... puzzling!
Missing functionality and unstable DSL/API
Lack of plugins and integrations
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BUT...
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It's
improving!
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Updated documentation
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Snippet generator
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Snippet generator
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DSL
examples
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DSL: read/write files
writeFile file: "output/usefulfile.txt",
text: "This file is useful, need to archive it."
...
String content = readFile file: "output/usefulfile.txt"
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DSL: archive
archiveArtifacts artifacts: 'output/*.txt',
excludes: 'output/*.md'
archiveArtifacts allowEmptyArchive: true,
artifacts: "**/build/libs/*.jar",
fingerprint: true
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DSL: current directory
node {
stage('report') {
dir('tmp') {
sh "mkdir ‐p output"
}
...
}
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DSL: withEnv
withEnv(['MYTOOL_HOME=/usr/local/mytool']) {
sh '$MYTOOL_HOME/bin/start'
}
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DSL: stashing
stash name: "first‐stash", includes: "output/*"
...
unstash "first‐stash"
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DSL: timestamps
timestamps {
stage "First echo"
echo "Hey, look, I'm echoing with a timestamp!"
stage "Sleeping"
sleep 30
stage "Second echo"
echo "Wonder what time it is now?"
}
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DSL: junit
stage('test') {
try {
sh './gradlew test'
} finally {
junit allowEmptyResults: true,
keepLongStdio: true,
testResults: '**/build/test‐results/**/*.xml'
}
}
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DSL: listing changes
for (def changeSetList : currentBuild.changeSets) {
for (def changeSet : changeSetList) {
println "Message: ${changeSet.comment}"
for (String path: changeSet.affectedPaths) {
println "Affected path: ${path}"
}
}
}
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DSL: control exceptions
node { try {
...
} catch (e) {
currentBuild.result = "FAILURE"
throw e
} finally {
...
}}
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DSL: slack notify
def buildStatus = currentBuild.result ?: "SUCCESS"
def subject = "*build and deployment of testapi*n ${buildStatus}:
def summary = "${subject} (https://jenkins/job/${env.JOB_NAME}/${e
def color = currentBuild.result == "FAILURE" ? "#D24939" : "#3D732
slackSend(color: color, channel: '#backend', message: summary,
teamDomain: 'jenkins', token: '...')
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DSL: build wrappers
wrap([$class: 'AnsiColorBuildWrapper']) {
// Just some echoes to show the ANSI color.
stage "u001B[31mI'm Redu001B[0m Now not"
}
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DSL: docker
docker.image('maven:3.3.3‐jdk‐8').inside {
git 'http://github.com/mysource.git'
sh 'mvn ‐B clean install'
}
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51.
DSL: parallel
parallel(
"test": {
sh './gradlew check'
},
"docs": {
sh './gradlew javadoc'
}
)
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51

52.
DSL: retry
retry(2) {
// Yes, flakey tests are bad!
sh './gradlew test'
}
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53.
Pitfalls
Groovy is sandboxed during execution of Jenkinsfile
Not all libraries can be used directly
Not all plug­ins expose functionality usable in Jenkinsfile
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54.
Pipeline
libraries
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Library structure
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Levels
Global library
Folder library
Jenkinsfile
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Use libraries
@Library('somelib')
import com.mycorp.pipeline.somelib.Helper
int useSomeLib(Helper helper) {
helper.prepare()
return helper.count()
}
echo useSomeLib(new Helper('some text'))
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03.04.
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08.09.
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Use libraries
@Library('github.com/fabric8io/' +
'fabric8‐pipeline‐library@master')
gitTag {
releaseVersion = '0.0.1'
}
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Blue ocean
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60.
Blue ocean
Jenkins UI redesign effort
Can be installed as a plugin to Jenkins 2.x
Reached v1.0 in 2017
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Install
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Contributions
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Dashboard
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Pipeline view
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Create pipeline
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Edit pipeline
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Save pipeline
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Success screen
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Failure screen
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Conclusion
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Take­aways
Jenkins is still a friend!
Jenkins is evolving and changing!
It will take some time...
Just be patient :)!
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72.
References
https://jenkins.io/doc/book/pipeline/
https://jenkins.io/doc/pipeline/steps/
https://jenkins.io/doc/pipeline/examples/
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73.
That's all!
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Thank you!
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