Sunday, May 16, 2021

Jenkins

To know the environment variables

http://<<system-name>>:8080/env-vars.html

 http://localhost:8080/env-vars.html

 To know the API of Jenkins

http://localhost:8080/api/

 Basic Jenkins example
https://www.theserverside.com/tutorial/Create-a-Jenkins-build-job-A-CI-tutorial-for-beginners

 To invoke a build on a project we need to form the REST API as below

JENKINS_URL/job/JOB_NAME/build

Path :  http://192.168.43.103:8080/job/FirstSample/build

For more details in term of build refer below

https://wiki.jenkins.io/display/JENKINS/Remote+access+API

Jenkins hand book



Jenkins Shared library

Sudoers file when using sudo command 


Lock and Milestone


To get crumb

curl -u "admin:admin" 'http://192.168.43.103:8080/crumbIssuer/api/xml?xpath=concat(//crumbRequestField,":",//crumb)'

CSRF Protection
https://support.cloudbees.com/hc/en-us/articles/219257077-CSRF-Protection-Explained
https://wiki.jenkins.io/display/JENKINS/CSRF+Protection

how to work out CSRF issue
https://stackoverflow.com/questions/38137760/jenkins-rest-api-create-job


To restart Jenkins from console
JENKINS_URL/restart 
Eg: http://192.168.43.103:8080/restart

More details about Jenkins restart
https://stackoverflow.com/questions/8072700/how-to-restart-jenkins-manually


To start and stop Jenkins from Linux use the below command

systemctl stop jenkins  --> To stop jenkins
systemctl start jenkins --> to start jenkins
systemctl status Jenkins --> to know the status

In suse Linux below commands will work

sudo service jenkins status

sudo service jenkins stop

sudo service jenkins start

sudo service jenkins restart 

In the Linux the war file is present in the below location

/usr/lib/Jenkins/


To get the a specific version war file in Linux use the below command

cd tmp
mkdir download
wget http://updates.jenkins-ci.org/download/war/2.204/jenkins.war

wget http://updates.jenkins-ci.org/download/war/<<version_number>>/jenkins.war


Reference links for building REST API call
https://support.cloudbees.com/hc/en-us/articles/218889337-How-to-build-a-job-using-the-REST-API-and-cURL-

https://support.cloudbees.com/hc/en-us/articles/220857567-How-to-create-a-job-using-the-REST-API-and-cURL-

https://stackoverflow.com/questions/8512807/calling-a-jenkins-build-from-outside-of-jenkins


WAS and Jenkins

https://aboullaite.me/continuous-deployment-with-maven-jenkins-and-was/

To pause the deployment you can use option as input

To have the input in script then use the below

 script {
                            input message: "Proceed or Abort",
                            submitter: "selenium,admin",
                            ok : "Yes, Proceed."
                           //parameters: [
                             //           string( name:'username',
                               //                 defaultValue: 'user1',
                                 //               description: 'Username of the user pressing Ok')]
                    }

https://jenkins.io/doc/book/pipeline/syntax/#input

******************************************************************
Declarative vs Scripted Pipeline

https://e.printstacktrace.blog/jenkins-scripted-pipeline-vs-declarative-pipeline-the-4-practical-differences/

https://www.jenkins.io/doc/book/pipeline/syntax/

https://medium.com/@brianrthompson/scripted-vs-declarative-pipelines-which-to-choose-c6af403f1e97

https://www.edureka.co/community/54705/difference-between-declarative-pipeline-scripted-pipeliine

**************************************************************************
Shared library in

https://devopscube.com/jenkins-shared-library-tutorial/

https://devopscube.com/create-jenkins-shared-library/

https://tomd.xyz/jenkins-shared-library/

https://jenkins.io/doc/book/pipeline/shared-libraries/

https://jenkins.io/blog/2019/01/08/mpl-modular-pipeline-library/

https://medium.com/@AndrzejRehmann/private-jenkins-shared-libraries-540abe7a0ab7

https://medium.com/spaceapetech/jenkins-pipelines-25ebc1980600

https://stackoverflow.com/questions/46507962/how-can-i-call-a-script-in-the-resources-folder-with-arguments-in-a-jenkinsfile

https://stackoverflow.com/questions/59316211/calling-script-from-resource-folder-in-jenkins-shared-folder

https://stackoverflow.com/questions/40213654/how-to-invoke-bash-functions-defined-in-a-resource-file-from-a-jenkins-pipeline
*************************************************************

shared library best practice

https://bmuschko.com/blog/jenkins-shared-libraries/

https://github.com/jenkinsci/JenkinsPipelineUnit/issues/51

https://github.com/stchar/pipeline-sharedlib-testharness/blob/master/jobs/hello.groovy

http://tdongsi.github.io/blog/2017/12/26/class-in-jenkins-shared-library/

https://stackoverflow.com/questions/51326983/using-jenkins-dynamic-shared-lib-into-pipeline



slave and master

https://github.com/salemove/pipeline-lib

https://embeddedartistry.com/blog/2018/01/11/jenkins-configuring-a-linux-slave-node/





Useful material
https://www.eficode.com/blog/jenkins-groovy-tutorial


to get the changes from last build to current build 
https://support.cloudbees.com/hc/en-us/articles/217630098-How-to-access-Changelogs-in-a-Pipeline-Job-


 checkout([$class: 'TeamFoundationServerScm',
                        credentialsConfigurer: [$class: 'AutomaticCredentialsConfigurer'],
                        projectPath: '$/STG',
                        serverUrl: TFS_SERVER,
                        workspaceName: '${JOB_NAME}-${NODE_NAME}'])
                    script{
                        println("currentBuild : "+currentBuild);
                       
                        def changedFiles = []
                        def changeLogSets = currentBuild.changeSets
                        for (entries in changeLogSets) {
                            for (entry in entries) {
                               for (file in entry.affectedFiles) {
                                 echo "Found changed file: ${file.path}"
                                 changedFiles += "${file.path}"
                                }
                           }
                       }
                    }


https://stackoverflow.com/questions/6260383/how-to-get-list-of-changed-files-since-last-build-in-jenkins-hudson

https://stackoverflow.com/questions/38084806/how-to-get-the-changes-since-the-last-successful-build-in-jenkins-pipeline

https://support.cloudbees.com/hc/en-us/articles/217630098-How-to-access-Changelogs-in-a-Pipeline-Job-

Jenkins environment variables

https://code-maven.com/jenkins-pipeline-environment-variables

****************************************************************
We can now communicate Linux  and windows using powershell 
Install powershell in linux 

https://docs.microsoft.com/en-us/powershell/scripting/install/installing-powershell-core-on-linux?view=powershell-7.1

https://en.opensuse.org/PowerShell

Install the following plugins as well verify before installing the plugins 
 Powershell 
 envinject

************************************************************

Jenkins shared library 

https://www.theserverside.com/blog/Coffee-Talk-Java-News-Stories-and-Opinions/Jenkins-Shared-Library-GitHub-Example-Pipeline
https://www.codurance.com/publications/2019/05/25/private-jenkins-shared-libraries
https://devopscube.com/jenkins-shared-library-tutorial/

*****************************************************************
To start slave 
https://pravinrajput.wordpress.com/2016/08/02/configure-jenkins-slave-and-connect-to-master/
https://wiki.jenkins.io/display/JENKINS/Step+by+step+guide+to+set+up+master+and+agent+machines+on+Windows

*****************************************************

Parallel, stash , unstash
how to avoid @2 or temp for projects

***************************

Variables usage from Jenkins pipeline to shellscript 

 for (i in [ 'a', 'b', 'c' ]) {
                        echo i
                        sh """
                        echo "from shell i=${i}"
                        """
                        sh '''
                        echo "from shell i='''+i+''' check"
                        '''
                         sh '''
                        echo "from shell i='''+"${i}"+''' check"
                        '''
                    }

https://stackoverflow.com/questions/41539076/how-to-pass-variables-from-jenkinsfile-to-shell-command

https://stackoverflow.com/questions/40323490/passing-variable-to-bash-script-in-a-jenkins-pipeline-job

*********************************************************

how to set environment variable in scripted pipeline

https://stackoverflow.com/questions/55123079/how-to-set-environment-variables-in-a-jenkins-scripted-pipeline
Posted by at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)