Github Hooks in Jenkins

🚀 Step 1: Install Required Jenkins Plugins

1. Go to Jenkins Dashboard → Manage Jenkins → Manage Plugins.
2. Under the Available tab, search for:
   • GitHub Integration
   • GitHub Plugin
   • Pipeline: GitHub (if not installed)
3. Install and Restart Jenkins.

🚀 Step 2: Configure GitHub Webhook in Jenkins

A. Configure Jenkins for GitHub Webhooks

1. Go to Manage Jenkins → Configure System.
2. Under GitHub, add a GitHub Server:
   • Name: GitHub (or any name)
   • API URL: https://api.github.com
   • Credentials: Click Add → Jenkins:
     • Kind: Secret text
     • Secret: GitHub Personal Access Token
     • ID: github-token (or any ID)
   • Click Test Connection (should say “Credentials verified”).
   • ✅ Manage hooks (must be checked).

Save.

B. Update Jenkins Pipeline to Use GitHub Webhook

1. Open your Jenkinsfile (or pipeline script).

pipeline {
    agent none
 
    triggers {
        // Trigger on push to 'develop' branch
        githubPush()
    }
 
    environment {
        mydockerimage = "harbor.registry.local/jenkins/mylocalimage"
    }
 
    stages {
        // Your existing stages...
    }
}

1. Commit & Push to GitHub.

Now it’s time to setup web hook in github

• Currently i am using vagrant machine and i have tried a lot to expose it port publically but i was unable to so to trigger the web hook i have used ngrok.
• To setup ngrok i have have installed and setup with github link.

Install ngork

• After installation signup and add the authentication key in the machine.
• After that you can run this command “ngrok http 8080” this will provide a url like this “https://2ca59e943d83.ngrok-free.app/github-webhook/” in current screen.
• To run in background i have created a script and it will run and print the url in screen.

#!/bin/bash
 
PORT=8080
LOGFILE="ngrok.log"
 
# Kill any existing ngrok process on this port (optional)
pkill -f "ngrok http $PORT"
 
# Start ngrok in background and save logs
nohup ngrok http $PORT > $LOGFILE 2>&1 &
 
# Wait for ngrok to initialize
sleep 5
 
# Fetch the public HTTPS URL
NGROK_URL=$(curl -s http://localhost:4040/api/tunnels \
  | grep -o 'https://[a-zA-Z0-9.-]*.ngrok-free.app' | head -n 1)
 
if [[ -n "$NGROK_URL" ]]; then
  echo "Your Jenkins webhook URL is:"
  echo "$NGROK_URL/github-webhook/"
  echo ""
  echo "Use this URL in your GitHub webhook settings."
else
  echo "Failed to get ngrok URL. Check logs in $LOGFILE"
fi

• After that you can validate using
  • ps aux | grep ngrok
  • curl http://localhost:4040/api/tunnels
• To kill the process
  • pkill ngrok

• After getting this url paste it in the

• In payload url paste the link and content-type application/x and add this.
• Now let’s configure jenkins to detect this

• After setting all these now if you push the code to github it will automatically trigger the pipeline.