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Introduction Of Jenkins: An Automation Tool For Software Development
Jenkins is an open-source automation tool that automates software development parts in relation to building, testing, deploying, and facilitating CI/CD. Also, it keeps track of the version control system.
Jenkins is a popular automation tool that is widely used in software development for several reasons.
To automate the testing of builds.
To detect errors in software development.
For real-time monitoring of code and integrating changes into the build.
Jenkins is very suitable for building CI/CD pipeline.
Features of Jenkins
Free and open-source
A good collection of plugins
Pipeline support
Easy to set up
Easy upgrades
Advantages of using Jenkins:
Open-source tool and user-friendly
Easy to install
Provides great collaboration between development and operations teams.
Code deployment is easy and happens in minutes, along with the generation of reports.
Free of cost
Platform independent
Rich plugin ecosystem
Code errors can be detected ...
... as early as possible
Jenkins works-flow
Jenkins checks for changes in the repository regularly.
With changes defined, Jenkins develops a new build.
Next Jenkins moves stage after stage in its usual pipeline.
If any stage fails, the Jenkins build stops. The software then informs the respective team about it.
However, if the stage completes properly, the code implements itself in the server to begin the testing.
After the testing phase, Jenkins shares the result with the team.
Jenkins pipeline
The pipeline is a set of plugins that support the continuous delivery and integration of all the jobs in the SDLC and DevOps life cycle.
The pipeline is responsible for building codes, running tests, and deploying new software versions.
Types of Pipeline:
CI/CD pipeline-
Declarative Pipeline- It is a very recent feature that allows easy use of code & it's defined within a block labeled ‘pipeline’
Scripted Pipeline- It is the traditional way of writing code in Jenkins & A scripted pipeline is defined within the node.
Steps to install Jenkins
Install Java
Install Apache Tomcat Server
Download the Jenkins war File
Deploy Jenkins war File
What is CI (Continuous Integration)
Continuous integration is the process of continuously checking the developer’s code into a version control system and triggering the build to check and identify bugs in the written code.
What is CD (Continuous Delivery)
Continuous Delivery is a process, where code changes are automatically built, tested, and prepared for a release to production.
Continuously integrated (CI) changes are deployed automatically into the target environment after all the quality checks are successful.
Jenkins Master-Slave architecture
The purpose of the Jenkins Master-Slave architecture is to distribute the load of builds and tests across multiple machines.
The master is responsible for managing jobs and dispatching build requests to the slaves, while the slaves are responsible for executing the build steps.
This architecture allows Jenkins to handle larger workloads and reduces the risk of overloading the master. It also enables parallel builds, which can significantly improve build times.
Useful plugins in Jenkins
Use cases
Code coverage measurement jobs
General-purpose automation
Reverse Engineering jobs
Software builds jobs
Sanity/Smoke/CI/Regression test jobs
Web/Data Scraping related jobs
Key Decoding jobs & many other jobs where software automation will be applicable.
Credits - Sachin Auti (DevOps)
MetricsViews Pvt. Ltd.
MetricsViews specializes in building a solid DevOps strategy with cloud-native including AWS, GCP, Azure, Salesforce, and many more. We excel in microservice adoption, CI/CD, Orchestration, and Provisioning of Infrastructure - with Smart DevOps tools like Terraform, and CloudFormation on the cloud.
www.metricsviews.com
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