Jenkins Groovy Scripting

Create default user

1. Create groovy file by path $JENKINS_HOME/init.groovy.d/basic-security.groovy

In Ubuntu 16 Jenkins home directory places in /var/lib/jenkins

2. Place in file next code

   #!groovy

   import jenkins.model.* import hudson.security.*

   def instance = Jenkins.getInstance()

   def hudsonRealm = new HudsonPrivateSecurityRealm(false)

   hudsonRealm.createAccount(“admin_name”,“admin_password”) instance.setSecurityRealm(hudsonRealm) instance.save()

3. Restart Jenkins service

4. After Jenkins starts you need to remove $JENKINS_HOME/init.groovy.d/basic-security.groovy file

Disable Setup Wizard

1. Open Jenkins default config file and add in JAVA_ARGS next key -Djenkins.install.runSetupWizard=false

In Ubuntu 16 default file places in /etc/default/jenkins

2. Create groovy file by path $JENKINS_HOME/init.groovy.d/basic-security.groovy

In Ubuntu 16 Jenkins home directory places in /var/lib/jenkins

3. Place in file next code

#!groovy

import jenkins.model.*
import hudson.util.*;
import jenkins.install.*;

def instance = Jenkins.getInstance()

instance.setInstallState(InstallState.INITIAL_SETUP_COMPLETED)

4. Restart Jenkins service
5. After Jenkins starts you need remove $JENKINS_HOME/init.groovy.d/basic-security.groovy file

After this Jenkins doesn`t ask you to confirm that you are admin and you will not see plugins install page.

How to get infromation about Jenkins instance

Open your jenkins instance script console https://yourJenkins:port/script following is an example for how to get information about this instance. copy the code to the console and click “Run”.

/* This scripts shows how to get basic information about Jenkins instance */
def jenkins = Jenkins.getInstance()
println "Jenkins version: ${jenkins.getVersion()}"
println "Available JDKs: ${jenkins.getInstance().getJDKs()}"
println "Connected Nodes:"
jenkins.getNodes().each{ 
  println it.displayName
}
println "Configured labels: ${jenkins.getLabels()}"

In this example you will see information about the Jenkins version, JDKs, agents(slaves) and labels.

How to get information about a Jenkins job

Open your jenkins instance script console https://yourJenkins:port/script following is an example for how to get information about a sepcific job. copy the code to the console, change the jobName to the required job and click “Run”.

/*This script shows how to get basic information about a job and its builds*/
def jenkins = Jenkins.getInstance()
def jobName = "myJob"
def job = jenkins.getItem(jobName)

println "Job type: ${job.getClass()}"
println "Is building: ${job.isBuilding()}"
println "Is in queue: ${job.isInQueue()}"
println "Last successfull build: ${job.getLastSuccessfulBuild()}"
println "Last failed build: ${job.getLastFailedBuild()}"
println "Last build: ${job.getLastBuild()}"
println "All builds: ${job.getBuilds().collect{ it.getNumber()}}"

first we get the Jenkins instance object, then using this instance we get the job object (item). from the job object we can get different information such as: is it currently building, is it in the queue, the last build, last build by status, and a lot more.