Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now Source: analyticsindiamag.com. Jenkins is an open-source continuous integration tool which is written in Java. By default, Jenkins will be running on port 8080. It is a master-slave topology which distributes the build and testing efforts over slave servers with the results automatically accumulated on the master. It is not only a continuous integration server but also