I've used Jenkins long ago and few days ago I've tried the current version. It seems that all build instructions now are made by Groovy scripts. I can't find in Jenkins documentation if it is possible to do it in the old way using UI? I believe Groovy has advantages but I don't know Groovy and old Jenkins functionality was enough to me.
you need to choose freestyle job and then you can use it the old way
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I've just started playing around with Jenkins - and I'm looking at Pipelines.
I'm looking to brush-up on my Groovy skills to facilitate this.
The latest literature is all "Groovy 3" based and comes with some significant new features, but despite having the latest Jenkins install (Jenkins 2.249.2), the embedded scripting engine seems to be older - from Jenkins' script console on my master:
println GroovySystem.version
Gives 2.4.12.
My question - Is the version of Groovy easily/sensibly configurable in Jenkins or is it usual to stick with whatever ships with Jenkins?
You must choose system groovy if you want ready access to the Jenkins internals, jobs, etc. See Groovy Script vs System Groovy Script, and Known limitations; you get what is packaged.
If you use external groovy and don't need to access Jenkins internals, your choice. Lots of internal debate on upgrading as it's lots of work. You can follow JENKINS-51823 and Pipeline Groovy Epic
I am new to Devops and started learning Jenkins. So could you please help me know, whether coding experience of any programming language is required to learn and have practice on Jenkins.
Thanks and Regards,
Srivatsasa
In my experience you will not need to program anything in order to perform task within Jenkins. You will need knowledge/experience with Maven, Ant, Git, SVN, etc, the particular technology will depend on what you want to do with Jenkins. When I use Jenkins I dont think that I have ever programmed anything.
To be truly effective and master Jenkins, you should learn Groovy. You can run any other types of programs from Jenkins, but any modifying or configuration of Jenkins will be done in Groovy.
That said, you don't have to know groovy at all to use Jenkins. You can do a LOT of what Jenkins can do and never write code. Just configure it in the UI.
Depends on what you want to do with Jenkins.
you can program in Jenkins in Groovy,Perl,Python and Bash and you can only perform simple builds ( mvn clean install )
it's all about what you want to do with Jenkins.
I have tons of existing Freestyle Jenkins jobs in my old Jenkins Instance and now I would like to migrate them to New Jenkins 2.0 pipeline jobs using a Jenkins file.
I am following this page to create a Jenkins file: https://jenkins.io/doc/book/pipeline/jenkinsfile/
Can someone please suggest me if there is any easy way (or) plugin i can use to convert these existing job's to pipeline view.
I haven't tried the plugin but while searching for same i came across this post:
https://jenkins.io/blog/2017/12/15/auto-convert-freestyle-jenkins-jobs-to-coded-pipeline/
Maybe this can help. Will update more after actually giving it a ago. You can go through and try by yourself as well.
don't think there is an automatic tool to convert jobs.
We created all new jobs with Jenkins DSL plugin
for the Jenkinsfile - we created some good examples of our basic flows and each team convert the relevant jobs.
I use Job DSL Plugin to generate my Jenkins builds. But sometimes I make small changes to the build in Jenkins and I want to port those changes back to my DSL script automatically. Is there any way to achieve this?
Currently there is no way to generate a Job DSL script for an existing job. This has been reported in the Jenkins issue tracker as JENKINS-16360 some time ago and someone even offered a bounty, but AFAIK no one is working on the issue.
I'd like to start a build for a job named project-${X} where ${X} is given by a parameter of the current build. Does this work, maybe with a plugin?
Thanks,
Carsten
Parameterized Trigger plugin has that feature. You need to use the latest version (2.15) - there seems to be a bug in earlier versions.
Your other options seem to be Python JenkinsAPI wrapper or Groovy run via Groovy Plugin that accesses Jenkins via its Java API.