Jenkins Shared Library Explained: The Complete Beginner Guide with Hands-On Demo
Jenkins Shared Library Explained: The Complete Beginner Guide with Hands-On Demo
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In this session, we deep dive into Jenkins Shared Libraries and understand how to design, configure, and use them effectively in real-world CI/CD pipelines. We start with the why behind shared libraries, break down the architecture and directory structure, and then move into a full hands-on demo using private GitHub repositories.
You will see how to centralize build and deploy logic, reduce duplication across Jenkinsfiles, and manage shared pipeline code in a clean, scalable way. By the end of this video, you will understand how shared libraries simplify pipeline maintenance and unlock reusability across teams and applications.
🛠 What You’ll Learn Today
Why Jenkins Shared Libraries are needed in real projects
What a Jenkins Shared Library is and how it works internally
Shared Library architecture and directory structure (vars, src, resources)
Installing Jenkins and Docker on EC2 for hands-on demos
Configuring a simple shared library step
Using private GitHub repositories with Jenkins Shared Libraries
Creating and pushing multiple application repositories
Adding a private shared library to Jenkins Global Pipeline Libraries
Moving build and deploy logic out of Jenkinsfiles into shared libraries
Running jobs, troubleshooting issues, and validating behavior
Understanding the real power and use cases of Jenkins Shared Libraries
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⏰ Timestamps
00:00:00 Introduction
00:01:08 Why Jenkins Shared Libraries
00:10:55 What is a Jenkins Shared Library
00:14:44 Shared Library Architecture and Directory Structure
00:25:30 Lab: Install Jenkins and Docker on EC2
00:36:01 Demo 1: Configure a Simple Jenkins Shared Library
00:48:40 Demo 2: Private Repositories with Jenkins Shared Library
00:48:51 Demo Overview: What We Are Going to Build
00:49:04 Step 1: Create Private GitHub Repositories
00:50:18 Step 2: Create GitHub PAT and Add It to Jenkins Credentials
00:53:11 Step 3: Prepare Project Files (Jenkinsfile, Dockerfile, App Code)
00:58:36 Step 4: Initialize Git and Push Repositories (app1 and app2)
01:05:43 Step 5 and 6: Create Jenkins Pipeline Jobs and Verify
01:12:51 Step 7: Add Private Shared Library to Jenkins Global Libraries
01:14:26 Step 8 and 9: Move Build and Deploy Logic to Shared Library
01:23:28 Step 10: Run Jobs and Verify with Troubleshooting
01:28:34 Step 11: Demonstrate the Power of Shared Libraries
01:35:57 Use Cases for Jenkins Shared Libraries
01:37:37 Outro
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#Jenkins #CloudWithVarJosh #CICD #DevOps #JenkinsPipeline #JenkinsSharedLibrary #GitHub #Docker #DockerHub #Jenkinsfile #Automation #PipelineAsCode