What is Jenkins? Jenkins For Continuous Integration

Skilled at my work area and believe in working with passion and work ethics. Have a good understanding of programming languages, operating systems, and databases. I have good communication skills and interested in staying updated with technology and learning new things. Scripted and declarative are the two types of Jenkins pipelines. When a DevOps engineer writes a Jenkins pipeline, they choose either to create in the scripted syntax or the declarative one.

what is continuous integration in jenkins

These three phases take software from idea to delivery to the end-user. Continuous integration covers the process of multiple developers attempting to merge their code changes with the main code repository of a project. Continuous Integration is a development practice in which the developers are required to commit changes to the source code in a shared repository several times a day or more frequently. Jenkins is a strong automation server that supports Continuous Deployment (CD) and Continuous Integration (CI) procedures. It enables programmers to automate a number of software development processes, such as the creation, testing, and deployment of programmes.

Continuous integration with Jenkins – Tutorial

You can use the Oracle JRE or OpenJDK if you have a Java 8 virtual machine. A Jetty application server often hosts Jenkins as a Java servlet. Not only that, but you can also use the Apache Tomcat Java application server. In recent years, Jenkins has been able to operate in a Docker container. However, there are read-only Jenkins images found in the Docker Hub repository. After committing Jenkins will build the project using the newly modified Pipelines.

  • For more in-depth resources, check out our content hub on Jenkins Tutorial.
  • Once a project has established a CI pipeline with automatic test coverage, it is a best practice to constantly develop and improve the test coverage.
  • If you have been introduced to the term Jenkins and are unsure how it relates to application development, you are at the right place.
  • CI enables better transparency and insight into the process of software development and delivery.
  • Most modern applications necessitate the development of code across multiple platforms and tools, so teams require a consistent mechanism for integrating and validating changes.
  • The basic functionality of Jenkins is to execute a predefined list of steps, for example, to compile Java source code and build a JAR from the resulting classes.

This helps developers more thoroughly validate updates and preemptively discover issues. In Continuous Integration after a code commit, the software is built and tested immediately. But when we consider a large project with many developers, commits are made many times during a day and with each commit, code is built and tested.


Without CI, developers must manually coordinate and communicate when they are contributing code to the end product. This coordination extends beyond the development teams to operations and the rest of the organization. Product teams must coordinate when to sequentially launch features and fixes and which team members will be responsible. The basic functionality of a Jenkins is to execute a predefined list of a steps, for example, to compile a Java source code and build a JAR from the resulting classes. The trigger for this execution can be time or be an event-based say every 15 minutes or after a every new commit. Developers have to wait until a complete software is developed for a test results.There is a more probability that a test results might show multiple bugs.

what is continuous integration in jenkins

For more information on Jenkins, check KnowledgeHut’s Jenkins Training. GitOps has a lot to offer developers who want to automate their deployment processes using scripts that are stored as a single source of truth in a version control management system. Such control and reliability are compelling reasons to make the move.

Jira Product Discovery

It is important to note that both these types of pipelines run on the Jenkins subsystem. There is no difference in the performance and problem solvability perspective. This process gets repeated endlessly through the whole development cycle. This Plugin allows to run Gradle builds, e.g., as required for Android, via Jenkins. To install Plugins in Jenkins select the Manage Jenkins  Manager Plugins link and search for the Plugin you want to install. Select it from the list and select to install it and restart Jenkins.

Moreover, in collaboration with Docker, Jenkins escalates the progress of the development team working on different projects. It also provides the software infrastructure with Agile development throughout the journey. Jenkins adheres to a master-slave architecture technique to manage distributed builds. You can have various users in the Jenkins pipeline to edit and execute several processes. Additionally, you can pause Jenkins pipeline processes until you get user output.

Jira Service Management

Although Jenkins requires scripting some automation steps, the program provides a fast and robust way to systematize the software development lifecycle. Jenkins is a platform for creating a Continuous Integration/Continuous Delivery (CI/CD) environment. The system offers many different tools, languages, and automation tasks to aid in pipeline creation when developing and deploying programs. Automating your build, test and deploy processes can increase the problems commonly happening on projects.

what is continuous integration in jenkins

Product and engineering will work closely to determine the qualifying business functionality expectations that will make up the automated test suite. Once version control is in place, finding a version control hosting platform is the next move. Most modern version what is continuous integration in jenkins control hosting tools have support and features built in for CI. Some popular version control hosting platforms are Bitbucket, Github, and Gitlab. Pull requests are an opportune time to kick off the CI pipeline and run the set of automated approval steps.

Deploy Helm charts with Jenkins CI/CD in Red Hat OpenShift 4

They also checked the build at regular intervals of time while they were developing their project. So, the path of the project which was in git hub repository was provided through Jenkins. Using the concept of CI, they built their project after a fixed interval of time which can be defined by build trigger option in Jenkins. Blue Ocean is still at the alpha stage of development, but the goal is for Jenkins users to be able to install it alongside the Jenkins Classic UI through a plugin.

Jenkins can deploy the build to an environment where user acceptance testing (UAT) can be done before it goes into production. Curly brackets enclose each step in the pipeline, expressed as a command with arguments. For the code to move through the Jenkins pipeline, it must first be committed to the source code repository. If you prefer writing code, you may construct a Jenkinsfile using a graphical user interface (GUI). You can’t get to continuous delivery or deployment without first solving continuous integration.

Benefits of Continuous Deployment

Developers and release engineers can use Jenkinsfiles to combine the practices of CI/CD and GitOps into a unified deployment process. It defines the entire build process, which ideally consists of different stages for building, testing, and delivering the application. Docker and container orchestration components like Kubernetes make it easier for teams to automatically set up and tear down these environments as part of the CI/CD process. The open-source project Spinnaker, created by Netflix, provides a robust Continuous Delivery and Continuous Deployment solution. Continuous Delivery is a small build cycle with short sprints where the aim is to keep the code in a deployable state at any given time.