How to configure webhooks in Bitbucket to trigger a build in Jenkins? How to trigger automated builds in Jenkins through Bitbucket?

Jenkins jobs can be triggered many ways. Here are those ways:

1. pull - using poll scm
2. Webhooks (push mechanism) - by triggering a build from Bitbucket or GitHub for every repository changes.
3. through slack channel. Click here to learn about trigger Jenkins job using Slack.

Webhooks are triggers that enables developers to trigger Jenkins jobs automatically every time there is a code change.

we will see in this article how to trigger a(push) build for every change in bitbucket repository:

Changes needed in Jenkins

1. Click on Manage Jenkins.   
2. Click on Configure Global Security. 
3. Uncheck the option for Prevent Cross Site Request Forgery exploits
4. In matrix-based security change: 

for Anonymous user, do the below:

Overall - Read   
Job - Build  
Job - Read   

Job - Workspace

Select the job you would like to configure webhook is for. Choose configure Also you need to have token created for the job you would like to trigger. Click on the build job. Go to triggers section and click on Trigger builds remotely (e.g., from scripts)

make sure you enter token name as MyToken in

 Authentication Token field. 

Also uncheck poll SCM option(if it was selected earlier) 

Changes in Bitbucket

1. go to bitbucket, choose the repository, go to settings, click on web hooks.

2. enter title, url which is your jenkins job url - append build/?token=myToken
 example the url should be like this - http://jenkins_public_dns_server_url:8080/job/myFirstAutomateJob/build?token=myToken

Sample url is given below:

http://jenkins_url:8080/job/myFirstAutomateJob/build?token=myToken

For e.g.,
jenkins public dns name - jenkins_url:8080
Freestyle job name -  myFirstAutomateJob
token= myToken
3. status should be active
4. click on skip certificate verification
5. triggers --> repository push

Now make a code change in bitbucket to see if that triggers a build in Jenkins automatically.