Continuous Integration with Jenkins Hands-on

What is Continuous Integration?

Continuous integration (CI) is the practice of automating the integration of code changes from multiple contributors into a single software project. It’s a primary DevOps best practice, allowing developers to frequently merge code changes into a central repository where builds and tests then run. Automated tools are used to assert the new code’s correctness before integration.

A source code version control system is the crux of the CI process. The version control system is also supplemented with other checks like automated code quality tests, syntax style review tools, and more.  

What is the importance of continuous integration?

In order to understand the importance of CI, it’s helpful to first discuss some pain points that often arise due to the absence of CI. 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 communication overhead of a non-CI environment can become a complex and entangled synchronization chore, which adds unnecessary bureaucratic cost to projects. This causes slower code releases with higher rates of failure, as it requires developers to be sensitive and thoughtful towards the integrations. These risks grow exponentially as the engineering team and codebase sizes increase.

Without a robust CI pipeline, a disconnect between the engineering team and the rest of the organization can form. Communication between product and engineering can be cumbersome. Engineering becomes a black box which the rest of the team inputs requirements and features and maybe gets expected results back. It will make it harder for engineering to estimate time of delivery on requests because the time to integrate new changes becomes an unknown risk.

What CI does?

CI helps to scale up headcount and delivery output of engineering teams. Introducing CI to the aforementioned scenario allows software developers to work independently on features in parallel. When they are ready to merge these features into the end product, they can do so independently and rapidly. CI is a valuable and well-established practice in modern, high performance software engineering organizations.

click here to read CI-CD MCQs

Click here to read more blog

How CI can be used?

CI is generally used alongside an agile software development workflow. An organization will compile list of tasks that comprise a product roadmap. These tasks are then distributed amongst software engineering team members for delivery. Using CI enables these software development tasks to be developed independently and in parallel amongst the assigned developers. Once one of theses tasks is complete, a developer will introduce that new work to the CI system to be integrated with the rest of the project.

What are diferences amoung CI vs Continuous Deployment vs Continuous Delivery?

Continuous integration, deployment, and delivery are three phases of an automated software release pipeline, including a DevOps pipeline. These three phases take software from idea to delivery to the end-user. The integration phase is the first step in the process. Continuous integration covers the process of multiple developers attempting to merge their code changes with the main code repository of a project.

Continuous delivery is the next extension of continuous integration. The delivery phase is responsible for packaging an artifact together to be delivered to end-users. This phase runs automated building tools to generate this artifact. This build phase is kept ‘green,’ which means that the artifact should be ready to deploy to users at any given time.

Continuous deployment is the final phase of the pipeline. The deployment phase is responsible for automatically launching and distributing the software artifact to end-users. At deployment time, the artifact has successfully passed the integration and delivery phases. Now it is time to automatically deploy or distribute the artifact. This will happen through scripts or tools that automatically move the artifact to public servers or to another mechanism of distribution, like an app store.

What are the benefits and challenges of continuous integration?

Continuous integration is an essential aspect of DevOps and high-performing software teams. Yet CI benefits are not limited to the engineering team but greatly benefit the overall organization. CI enables better transparency and insight into the process of software development and delivery. These benefits enable the rest of the organization to better plan and execute go to market strategies. The following are some of the overall organizational benefits of CI.

1. Enable scaling

CI enables organizations to scale in engineering team size, codebase size, and infrastructure. By minimizing code integration bureaucracy and communication overhead, CI helps build DevOps and agile workflows. It allows each team member to own a new code change through to release. CI enables scaling by removing any organizational dependencies between development of individual features. Developers can now work on features in an isolated silo and have assurances that their code will seamlessly integrate with the rest of the codebase, which is a core DevOps process. 

2. Improve the feedback loop

Faster feedback on business decisions is another powerful side effect of CI. Product teams can test ideas and iterate product designs faster with an optimized CI platform. Changes can be rapidly pushed and measured for success. Bugs or other issues can be quickly addressed and repaired.

3. Enhance communication

CI improves overall engineering communication and accountability, which enables greater collaboration between development and operations in a DevOps team. By introducing pull request workflows tied to CI, developers gain passive knowledge share. Pull requests allow developers to observe and comment on code from other team members. Developers can now view and collaborate on feature branches with other developers as the features progress through the CI Pipeline. CI can also be used to help QA resource expenses. An efficient CI pipeline with high-confidence automated test coverage will safeguard from regressions and ensure that new features match a specification. Before new code is merged it must pass the CI test assertion suite which will prevent any new regressions.

The benefits of CI far outweigh any challenges in adoption. That said, it is important to be aware of the challenges of CI. The real challenges of CI arise when transitioning a project from no CI to CI. Most modern software projects will adopt CI from early inception stages and alleviate the challenges of later adoption.

4. Adoption and installation

The challenges of continuous integration are primarily around team adoption and initial technical installation. If a team doesn’t currently have a CI solution in place, it can require some effort to pick one and get started. Thus, considerations need to be made around the existing engineering infrastructure when installing a CI pipeline.

5. Technology learning curve

CI functionality comes with a list of supportive technologies that may be learning curve investments for the team to undertake. These technologies are version control systems, hosting infrastructure, and orchestration technologies.

Maven Project Hands-on using Jenkins:-

Hands-on 1:-
Welcome to Play with Jenkins 

Problem steps:-

  1. Now, unlock jenkins using the Adminstrator password in the specified location and continue with install suggested plugins.
  2. When you fin d the create first admin user page, click on continue as admin and then click Save and Finish.
  3. Now, your Jenkins setup is complete and clik on start using jenkins.
  4. Create a new job named JenkinsDemo
  5. Proceed with the freestyle project
  6. Now, Configure the source code of your job with Repository URL.
    Get Username: Handson_user
    Get Password JQdQy*
  7. Add build setup to execute a shell with Javac.jenkinsDemo.java and java.jenkinsdemo
  8. now save and Start building your job.
AVvXsEiUnFtb4bwOibhjOgdj 8bCfbGbq8mSV5GEQXBPm71rSa2O0v6BbxoAb13LuOYUK7CHfMI79w4MI24bNSRiK009qKU3rNu8KYL0icnwuuZvz1V7jOUWIVC2JnrCYuvV 441L9JvPs5HVkAC psZJvZWhppMARAEyb5ygbMHhQUcT9MHOyzaclKIPxid=w640 h332
AVvXsEg6x9yy6RcXLEMmtCppPTXItJfsmfrRbtgmqcGR9Bd6Q4qoRwJEE7WbTONumWW2EM6C4g5a9TQ8A8hKB3W4nWGXh3v9n A9l7W3MF PmSjXTA4Crr3YFMXCDzz501zo8F08YkP4tSnW LlBExZmiOSZidA 6paJ1Ao1Yjq4 gbU RidR3VynIH 6 he=w640 h332
AVvXsEhtCKa9oBqnqX6R1DROwbgeKDNzaaG WZDM5O1r4hRim7cXH2feqggwfF cFBtKyIJGn SLsSoMYWj W CnBDp4MfB7arIZhKpo686kqKIkzeaG6RaG3Uid6EOCYFj9rUs8xeTL3T7cXklOjbiW1z0TBxMkcIWyOSBOlxAxi9 IsVu0haFum8 01Xr4=w640 h314
AVvXsEgjPU3T7vqaJcyJQqYnVXvXxx2d UxP1qsmTy6ucx2SW JRwvNnbfZEl0OSkvjo7kDiREj7Sfgl 9RNfrMM vb8WN6RGOCtVzRsHdtilBy7apakbxAcrohGoJwwZ8MPpqHFGHYV4WTN1y SdDshfyzWFjdSxW7atWupZRN 7aJNVKpsIaCQQJE4VSAb=w640 h316
AVvXsEg1lLuYVAtYyrQhbv7FvBZK O VjaEdV5OGUwK2rZOqYzGVOeSC3z6PQTgWJdiHKD469Yd vIC95kSKVHRlg2BusjAuxpKd4bicGQ42aYRq1E685jPlbbF6Q7 MkRSnfP9o6XPTF8x1oW8QIjz17FF7uTDc b tKvMCiFNz48YRvHeObpB134ZWEhNu=w640 h316
AVvXsEhDQB6ui3XTbuyT1oumhH9shM0vOnebwYMKT2g EFmpHYwz9nWMQGD9gCNbES49ROVMcgGMhw B beWfV BpYg9yi QJLWisQmvkEnLuDlPcak8D8End7NQ98nYK3hJryjEOdV0owLUUlbgMMEvEZMrsAZcZ3Nv10JcefTM8uUM1 44uonFzy6Ao2z=w640 h312

Hands-on 2
Generate JUnit Test report with Maven project

Welcome to Generate JUnit Test report with Maven project

Problem steps:-

  1. Create a new job named MavenDemo
  2. Project with the freestyle project.
  3. execute shell:- javac mavenDemo.java
    Java MavenDemo
AVvXsEhsrAgJaokStG7UDrcynjTA81e4bqedXDhW5uO1F2uqJC3gh4eTUk3zupnRgy9sVy9Re9YzcJp9MjIrtS1say1Tl7tl2LhF4Hw3Dm8nC9bZZwvlqr24RMGp 0Ye44diMt5k7DUV201qDTwe t2Nq sOlKsdUUqtF 51ndWeAmeCUD0ZDcXoRzt914i0=w640 h332
AVvXsEhfbldUO5HAnnrOmMrBos0lD ay49Y2WFPpmfoMb C5PJ4 rP86Kmpf8BcqzZRjmanEP9d0JeD9gutVlX4n1wC tAZQzEV044ZoM3AfUq1xeYS khkDyJf18CguSu DbWVXwbJcYvOsurnB8rJjAdw5bsa4GS3eKpeMrFdYXw86beLrjW8rX8LSmdqu
AVvXsEiOkYaLPDAFrRkbPfZUHT1RE2JJ6UONla5d3brEte0pW GAMLlZS9Ir HwhcZcoi9pojAna9YxW8qz3W7 r vcjDnIRWP6EY1gvkkODRSLdyV38k2r0xgNNylMSEUnwOu6zYlauen9URUlrXWpe1fNU26UXneupZxym5oxDyBitwOxsQdbsFVSTc1pX=w640 h464
AVvXsEhBIyUP0tF8rU6x3iq4O78Gz97fzoF98tB1m8cTk2dLmyR5PWG3ZFNEOYYP fLNeoMDTHhsHI6Bkpl7vxxq7NX31Ky F2IhxeXQQM19x8pAR 2 yRoXdtQF41gIONBHHRDMQuAFlSIFVNFQpWs0fgDqYVS5gh2RHj8nNk6gjZZq BiJUO1Ib8xXwwVj=w640 h452
AVvXsEhknE863XAjDElOWC13lq08IyGLQllxyGr1xbb6ElJsUZtq1mcL S7o98BCbPit9lK5eYb3BjrUMyNpT WriRpk5mkJg5dABHmJpe2MI 4bQ4E1DXOeJRoTadbhqp1E5VuYrjPUgGf082AHBk6UE0Qa qtkzL4VwVQmSflq JbcWLui8w7jPnE22RMT=w640 h458
AVvXsEgpUumHaDVkihpvbXGmvZsNZq1QFeI PNzBgSVCCNaeHadcGUtVZ7FTLaZ7c1G2or CLeRt8lPe7x2KPjYlLjIn5k3Svm5yThn2fhUmuXdohO5P JG MqsuhEh KDYm3bEXAeaCl Pz B y JlcbO79cJA OzOoetK6Yraf0y05GdPWaWiMRR1dLKr=w640 h460
AVvXsEjZZddTc88abbC161SkfrTDqCcjdYv2qPwLFcVNFcWMljH589ucC1pbtcQSvU 6PrPjcgzhV PdcHN2jAwXo69zskcSZVsKzJZ8SZGEvMgt6abyP9MJbM8x6KFreDrf5jT973LpK 9c7Zyi1FAlkbMExxYuv2A dfSmkacdrEB6BliTAq7DSby5Xlo4=w640 h318
AVvXsEhafgP7kyT8ewkvT8uDp4T3f9WYOYONFCQWOTqOMqgwcDCIj LHazY7FR9i I2nE0GohIHTJ2YZEM5rNx20Fn NoTXHOrgJ1HozsP7ZvbuVsPoCuM4F8
AVvXsEguYgCjcAXUgAbXvYbP7hJD8P dftVp AttPvfR4mca UKvtgQns2VbLjjnHm0TmMQMbPYSgtME3dQn07qGOMEhvylUEg5XTAC9B2RssM9dxNyGAe tP5tHar277hhloVUA7PWpkOYGoXkw a7wumaMehpPD ntjfkHqGmdA1LE1vQRKQtEGn96hK5y=w640 h292
AVvXsEhnrlGV2l 1EPx8XPMltkou0Eipn4tiwVcLVjTVQ0YXPfHj0xr qmG7YmrruteiV5eP8CPBq z lSbN0umYoBh9Qaoaq5Xjw u1CV3P8 xuUC 7V27vwx5iN8pBbYkUCozMyI6IuvOMD9TjXujh8n2uI33tgGL1ldE6 uIKCHgYF1umfyHeA
AVvXsEh143OFj9aHlzm7XJVcqNT7LnTVg1oWlV30cGWG9LK2N6ybt64IYAJjD eaEJXMBQSxP1pVsh REeOZoc4SSwF6aj8K57Mw45ATWpyJiHn23gkcBQt EKxILD81R5gYobudOtKUwENPbk57vAQ X4Vqtbeo0AWf82uDaG4hhujf1Bub0vZtF1TpNijJ=w640 h312
AVvXsEid3IcT5eJiEZn52CG8MKq M73u3fK1KiG4Z5a3 lY7uUQbTQqqa7D6 NXHuZZnZ1Hey8SC Q52S2mVmiCgJR51XyIF9GJnPMWpevFapTnc8twWP4athdAQpb6jNYbdeRWxenKK75l3i7PqQJzxPlazv ywY5W aX3i8ux Vb WvTsLWQV61N1XEQ
AVvXsEiqIzv9NYIvuE 7CEFiEJLk5GQ3ypj9G1AZJk6cZgV5 d3 SFZCuQQ0UAG11MldhrK3fUXzf7G1YBbTiQnStFMMHJEXT0e6ZOmvISw5wQXq4M8zm7VfX DT sm2dco3z7ZdmaHSuNc2MalCrOHDSCWEZ8jl40jI lIlrl3a8mZ2DCDItWiU77bULRcU=w640 h288
Jenkins

SAP S/4HANA Master Data Concepts Questions & Answers
SAP S/4HANA Functional Capabilities 1909 Questions & Answer
SAP S/4HANA Technical Capabilities 1909 Questions & Answers
SAP Implementation S/4HANA Project Management Questions & Answers
SAP S/4 HANA Enterprise Management – Sales Questions Answers
SAP S/4HANA Key Concepts Overview Questions & Answers
SAP S/4HANA Enterprise Structure Questions & Answer
SAP S/4HANA Reporting and Analytics Questions & Answers
SAP S/4HANA Navigation Interview Questions and Answers
SAP S/4HANA Awareness 1909 Questions and Answers

About Author


After years of Technical Work, I feel like an expert when it comes to Develop wordpress website. Check out How to Create a Wordpress Website in 5 Mins, and Earn Money Online Follow me on Facebook for all the latest updates.

2 thoughts on “Continuous Integration with Jenkins Hands-on”

  1. What a fantastic post! This is so chock full of useful information I can’t wait to dig deep and start utilizing the resources you have given me. Your exuberance is refreshing.

Leave a Comment