github pull request builder workflow with Jenkins - jenkins

I am completely new to DevOps and couldn't fix the builder and merger plugin flow.
I have 2 Jenkins jobs.
job A: pipeline with build trigger as GitHub Pull Request Builder.
job B: freestyle project which is triggered on the successful completion of job A (uploading artifacts to Nexus etc.)
Job A should be triggered automatically once pull request is created in GitHub but it doesn't work at all. Below is from GitHub.
[GitHub says "CI setup hasn't been done yet"][1]
Continuous integration has not been set up
Even if i build Job A manually, Job B doesn't merge.
Not sure what to look into.

Related

Auto create Jenkins job from source code repo - no jenkins interaction

I am looking to auto create jobs in jenkins upon pull request , branches, master push etc similar to what we do in Gitlab. My SCM is butbucket here.
I have so far setup docker based agent integration with Jenkins and butbucket, when I create a job and configure it to use repo it all works fine , but I just want to remove altogether a step of job creation in jenkins and want the workflow like this:
In butbucket source code repo to keep all pipeline configuration for and branch and tag to trigger Jenkins pipeline without touching Jenkins for job creation or any config creation. Just want to drive all via the script in code repo for pipeline .
Any recommendations or help for workflow would be appreciated
I got the answer to my Question , hence listing the steps for very simple use case for how it would work.
Steps:
Go to bitbucket server repository to which you want to enable pull request based trigger. Add Post Recieve Hook to this repository "Webhook to Jenkins for Bitbucket Server" , Enable this hook to have connection to jenkins. Enabling this plugin will issue POST request to jenkins each time a new Pull request is opened.
On Jenkins Server this will work with Blue Ocean Pipeline which by default will pick the change for pull request branch and trigger the job on each pull request.
Blue Ocean pipeline will by default create multi branch pipeline job to work with bitbucket repository.

How can I trigger a Jenkins pipeline run from a GitHub webhook and still allow manual builds?

I am using GitHub pull request builder to trigger pipeline builds from GitHub webhooks when developers make a PR.
To make sure I pull the pipeline script related to the PR I am using Pipeline script from SCM and specifying ${sha1} as the branch specifier. The issue is that when I trigger the build manually, Jenkins is trying to pull a ${sha1} branch (since the env variable doesn't exist).
Is there a way to default to master when triggering the build manually?

How to trigger jenkins job that execute automation test scripts when code is pushed in development server?

I am new to Jenkins. I have development code repository at bitbucket and another test script code repository at bitbucket. Now I have setup a Jenkins job by linking test code repository. Is there any way to trigger a build when code is pushed in develop repo?
I tried many times by pushing change in develop repo, but it does not triggers the jenkins job.
You can configure the Jenkins trigger as an SCM poll.
You will have to enter a cron expression for the polling time period, like:
*/5 * * * *
This means polling from 5 to 5 minutes. If any change is detected, then the build is triggered.
You can add the BitBucket Plugin to your Jenkins instance. It will allow you to configure a webhook in BitBucket that will then trigger any Jenkins job listening for that webhook. The plugin's page has a detailed breakdown, but the basics are;
In your repo in BitBucket, create a new Webhook using your Jenkins' url. I believe the url is generally http://[your jenkins url]/bitbucket-hook/
Make the trigger a repo push.
In your Jenkins job, check the box "Build when a change is pushed to BitBucket" under the Build Triggers section.
Now any time you commit to the repo you created the Webhook on, that Jenkins job will be run.
You can also limit what branches trigger commits by parameterizing your Jenkins build to ignore certain branches / keywords / etc if that's something you need for your specific project.
You can use webhooks to trigger build automatically. There are few options how to use it. See the following articles: this, this and this.

Triggerig Jenkins pipeline job after code pushed to github

I want to know how we can setup a jenkins pipeline job which gets triggered after each commit made github private repository.
I am able to do it using a freestyle job but not able to do it using a pipeline.
I did setup the gihub project url, GitHub hook trigger for GITScm polling and wrote a simple pipeline script of checking out the branch.
When I do a changes in the branch and commit it the build wont get triggered.
Can I get a solution on this please?
It works when we add a timestamp block in the pipeline code.
I m able to trigger the pipeline by Adding a GitHub Webhook in Jenkins Pipeline.
I have followed steps mentioned in this blog.
In my case jenkins is running on localhost. Replacing localhost with your jenkins_url should work.
Also, I did not found GitHub Pull Requests mentioned in the blog, so I skipped that step.
After completing the configuration you have to build the pipeline manually once, after that everytime a developer commits a code to GitHub, pipeline build will be triggered.

Jenkins github pull request builder do not trigger downstream projects

I recently set up github pull request builder on jenkins and it works well when I commented the trigger phrase on the PR. But when I tried to run multiple jobs by setting the downstream upstream relationship, I met this problem which is jenkins triggered the job job A set up by pull request builder as normal, but wouldn't trigger the downstream job job B when job A has finished.
Here are some of settings:
In job A: just everything on the instruction page of the github pull request builder
In job B: Under Build Triggers section, I checked Build after other projects are built and set the projects to watch to be job A, and checked Trigger only if build is stable (Nothing about github pull request builder on job B)
Try doing this from the upstream project, instead. From the upstream project configuration, Add post-build action --> Build other projects, then enter the name of the project to build.

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