"Streamlining Your CI/CD with Jenkins Pipeline: Understanding Declarative and Scripted Pipelines and Creating a Pipeline to Print 'Hello World"

1- What is Pipeline?

Jenkins Pipeline is a plugin for Jenkins that allows you to define and manage continuous delivery pipelines using code. With Jenkins Pipeline, you can define complex workflows that are made up of different stages, such as building, testing, and deploying your software. These workflows are defined using a Groovy-based domain-specific language, which allows you to version and manages your pipeline as code. By using Jenkins Pipeline, you can automate your software delivery process, improve collaboration, and achieve faster releases.

2- What is Declarative Pipeline?

Declarative Pipeline is a feature of Jenkins Pipeline that provides a simpler and more opinionated syntax for defining continuous delivery pipelines. With Declarative Pipeline, you can define your pipeline as a series of stages, each with its own set of steps to perform. This makes it easier to understand and maintain your pipeline as it evolves over time.

The syntax of Declarative Pipeline is based on the YAML format, which is more human-readable and easier to understand than the Groovy-based syntax used in traditional Pipeline. It provides a set of pre-defined steps that cover common use cases, such as building and testing your code, deploying your application, and publishing artifacts.

Scripted (Groovy):

Jenkins Scripted Pipeline is a way to define continuous delivery pipelines as code using the Groovy language. It allows developers to have complete control over the flow of the pipeline and customize it according to their requirements.

In the Scripted Pipeline, the pipeline code is defined within a single script file, and developers have the flexibility to write complex logic to handle various use cases. The Scripted Pipeline syntax provides a rich set of commands and functions that can be used to control the flow of the pipeline, such as loops, conditionals, and error handling.

Overall, Jenkins Scripted Pipeline is a powerful and flexible way to define continuous delivery pipelines in code, providing developers with fine-grained control over the entire process.

Why you should have a Pipeline? Having a Pipeline in Jenkins can offer several benefits for software development teams:

Continuous Delivery: Pipelines allow for continuous delivery of code changes, allowing teams to more quickly and reliably release new features and fixes.

Improved Visibility: Pipelines provide a clear view of the development and deployment process, making it easier to track changes and identify issues.

Reusability: Pipelines can be reused across multiple projects, saving time and effort in setting up and configuring builds.

Flexibility: Pipelines can be customized to fit the specific needs of each project, allowing teams to optimize their development and deployment process.

Overall, a Pipeline can help teams streamline their software development process, reduce errors and downtime, and deliver high-quality products to customers faster.

------------- TASK--------------

Create a New Job - Pipeline Project = To Print " Hello world".

Step-1: Create a job and give a name to the job and select "Pipeline" and OK

Step-2: Open the job configuration page and start adding the step to build the pipeline. First, give the job description.

Step-3: Down in the Configuration - There will pipeline script option - Now we have to write the pipeline script for the job. For printing "Hello World".

Step-4: Save the configuration. And a job will be created. Next.

Step-5: Now, Click on "Build Now" to build the pipeline. As you can see after clicking build now the pipeline for the job is created as green tick #1 in the bottom left-hand side of the image given.

Step-6: Click on the green tick #1 build button to go to the console output and see the logs: "Hello World" is been printed. As seen in the image

That's it we have created our first pipeline in Jenkins. Congratulation

Thank you for taking the time to read my blog. I hope you found it informative and helpful!

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