I inherited a project set up to use Jenkins. I set the trigger to poll SCM every 5 minutes and disabled the pre-existing build remotely trigger. So now the only trigger set for Jenkins is to poll SCM every 5 minutes. However jenkins is building the project everytime the project repo is updated and NOT on polling. The polling log specifically says that it won't build (due to the author of the commit being in the excluded list) but the project builds anyway, unrelated to the polling. There are no other triggers set.
I didn't find any scripts anywhere that could explain this behaviour.
Related
All my Jenkins jobs are triggered both by a Github webhook, but also via a scheduled build one per week. The build process is heavily cached to make the webhook CI builds finish quickly.
I would like to add a line to my build script which wipes the cache during the weekly scheduled build, and make it build from scratch. Is there a variable in the build script to identify if a build was triggered by a webhook or schedule?
Maybe the envInject plugin will give you what you need?
This plugin also exposes the cause of the current build as an
environment variable. A build can be triggered by multiple causes at
the same time e.g. an SCM Change could have occurred at the same time
as a user triggers the build manually.
The build cause is exposed as a comma separated list:
BUILD_CAUSE=USERIDCAUSE, SCMTRIGGER, UPSTREAMTRIGGER, MANUALTRIGGER
In addition, each cause is exposed as a single envvariable too:
BUILD_CAUSE_USERIDCAUSE=true
BUILD_CAUSE_SCMTRIGGER=true
BUILD_CAUSE_UPSTREAMTRIGGER=true
BUILD_CAUSE_MANUALTRIGGER=true
I have a Github project with a webhook to trigger the build on Jenkins.
It works pretty well. I used the option "Trigger builds remotely" from Jenkins.
In the final steps of the build, it updates some files to update the package version, and submit it back to github.
This triggers a new build, generating an infinity loop of builds.
How to prevent this extra build to be triggered?
I tried the option "Polling ignores commits from certain users" to prevent builds from the bot user. but it seems to work only with the Polling process, and not the remote trigger.
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.
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 jenkins job automatically on change in development repository ?
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.
Builds by source changes
You can have Jenkins poll your Revision Control System for changes. You can specify how often Jenkins polls your revision control system using the same syntax as crontab on Unix/Linux. However, if your polling period is shorter than it takes to poll your revision control system, you may end up with multiple builds for each change. You should either adjust your polling period to be longer than the amount of time it takes to poll your revision control system, or use a post-commit trigger. You can examine the Polling Log for each build to see how long it took to poll your system.
Alternatively, instead of polling on a fixed interval, you can use a URL trigger (described above), but with /polling instead of /build at the end of the URL. This makes Jenkins poll the SCM for changes rather than building immediately. This prevents Jenkins from running a build with no relevant changes for commits affecting modules or branches that are unrelated to the job. When using /polling the job must be configured for polling, but the schedule can be empty.
We have a job in a jenkins environment which is triggered based on the changes found in the git source code repository.
When the job is running, the git polling log shows nothing and until the job finishes the execution, polling log doesn't have anything on it.
It always shows log after completing the job and another note is that, enable concurrent builds option is not set to make sure only one build runs at a time.
I would like to understand whether it is a known behavior on jenkins front to halt polling when the job is running and whether the concurrent builds option is enabled or not?
I had a similar problem and discovered this: https://issues.jenkins-ci.org/browse/JENKINS-7423
It looks like it's related to the polls requiring a workspace in order to perform the checkout. You can manually kick off new builds and they will pick up SCM changes.