Jenkins CI/CD pipeline with GitHub webhook integration for Deploying Docker applications on EC2 instances

prerequisite:

1. AWS EC2 instance with docker and Jenkins installed in it.

   For creating an EC2 instance:

   · AMI: ubuntu.

   · Instance type: t2.micro (free tier).

   · Key pair login: Create > docker.pem.

   · Allow HTTP.

   · Allow HTTPS.

   . Docker installation: sudo apt install Docker.io -y

   . Jenkins installation: Link

   

   . Allow TCP on ports 8000 and 8080 by editing the inbound security group.

   

2. SSH into the EC2 instance just created. Create SSH private and public keys by ssh-keygencommand. cd .ssh to see the keys.

   

3. Setup Jenkins, you can check my blog on it: (You can check the Jenkin server at http://<public_ip_addr_ec2>:8080/)

   https://sri766.hashnode.dev/jenkins

   After configuring Jenkins, just log in with a username and password

4. Click on Create an Item, Name: Todo-app, FreeStyle project.

   fill description👇

   

   add git URL: In my case it's https://github.com/sri766/node-todo-cicd.git

   (fork it:https://github.com/LondheShubham153/node-todo-cicd)

   add credential: You can add an access token as a password as I did here!👇

   

5. Add build Steps Execute Shell

    sudo docker build -t todo-app .
    sudo docker run -p 8000:8000 -d todo-app
   

   

1. Hit save and Run Build.

   

   Note: Make sure no docker container is running on port 8000. You can check docker ps or lsof i:8000 and if it is running just copy the contained ID and run docker kill <paste_copied_id>

Now, our aim is to integrate GitHub webhook to Jenkins to make a ci/cd pipeline

prerequisite: GitHub integration plugin to be installed in Jenkins, you can check it, Goto manage Jenkins -> plugins -> available plugins->(search)GitHub integration

1. Now add a public SSH key to the Github

   settings ->SSH and GPG keys -> new SSH key

2. You can find the public key in .ssh directory in EC2 instance just copy it and paste it into GitHub.

   

3. Add Webhook

   payload URL: http://<public_ip_addr>:8080/github-webhook/

   type: application/JSON

   active: true

   

   NOTE: just check goto manage Jenkins->System->Jenkins URL, this must set to be http://<public_ip_addr>:8080

   ( AWS public IP got changed whenever it stopped and started again) and check under the Github server section valid credential is used or not.

4. Now, set GITScm polling checked.

   

5. Now, commit some changes it Github and Jenkins triggers build automatically.

   

   

   

   

Done!!🎉💕

credit: https://medium.com/@chetxn/project-1-implementation-3e4785af90f6

#90daysofdevops

Thank you for your patient reading.