Complete Jenkins CI/CD Project

Let Set Up the Jenkins CI/CD Project

For this follow these step carefully and here we begins

Step 1: Fork the Repository

First, you need to fork the repository. This will create a copy of the project under your GitHub account, allowing you to make changes without affecting the original project.

1. Go to the repository URL.
2. Click on the "Fork" button in the upper right corner.
3. Select your GitHub account to fork the repository.

Step 2: GitHub Integration with Jenkins

Next, set up a connection between your Jenkins job and your GitHub repository.

1. Open Jenkins Dashboard.
2. Create a New Item: Enter a name for your job and select "Freestyle project
3. Configure GitHub Project:

1. Source Code Management:

Click-on Build now

Task 2: Running the Application with Docker Compose

Create a Docker Compose File

Docker Compose simplifies running multi-container Docker applications. Create a docker-compose.yml file in your project root:

version: '3'
services:
  app:
    image: node:14
    working_dir: /app
    volumes:
      - .:/app
    command: sh -c "npm install && npm start"
    ports:
      - "3000:3000"
        

Step 2: Configure Jenkins Job

1. Open Jenkins Job Configuration.
2. Build Triggers: Ensure "GitHub hook trigger for GITScm polling" is checked.
3. Build Environment: Check "Provide Node & npm bin/ folder to PATH".
4. Build Steps: Execute Shell: docker-compose up -d

Step 3: Run the Project

1. Save your Jenkins job configuration.
2. Click "Build Now" to trigger the build manually or push a change to your GitHub repository to trigger automatically via WebHooks.

What is WebHooks?

Webhooks are automated messages sent from one application to another when a specific event occurs. They are a way for web services to communicate with each other in real-time, without the need for constant polling. Essentially, a webhook allows an application to automatically send data to another application as soon as a particular event happens.

Continuous Integration/Continuous Deployment (CI/CD):

• In CI/CD pipelines, webhooks can be used to trigger builds or deployments whenever new code is pushed to a repository (e.g., GitHub, GitLab).
• For example, when a developer pushes code to GitHub, a webhook can trigger Jenkins to start a new build process.