NODE.js-based application with end to end CI/CD pipeline

This project is a Node.js-based web application that uses the Express framework for building a RESTful API. The application is designed to interact with a MongoDB database for data storage and Redis for session management, and includes an end-to-end CI/CD pipeline using Jenkins and Argo CD for continuous integration and deployment.

Installation on EC2 Instance

AWS EC2 Instance

• Go to AWS console
• Go to instances
• Launch Instance

You need to use t2.large because we're going to use docker as an agent for our pipeline which uses more CPU & RAM.

Install Jenkins.

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Pre-Requisites:

• Java (JDK)
• Postman (For using APIs)
• Docker Desktop
• minikube (Running on local device in docker desktop)

Run the below commands to install Java and Jenkins on the EC2 server

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Install Java

sudo apt update
sudo apt install openjdk-17-jre

Verify Java is Installed

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java -version

Install Jenkins

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curl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee \
  /usr/share/keyrings/jenkins-keyring.asc > /dev/null
echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \
  https://pkg.jenkins.io/debian binary/ | sudo tee \
  /etc/apt/sources.list.d/jenkins.list > /dev/null
sudo apt-get update
sudo apt-get install jenkins

Note: By default, You will not be able to access Jenkins in the external world due to the inbound traffic restriction by AWS. Open port 8080 in the inbound traffic rules as show below.

• EC2 > Instances > Click on

• In the bottom tabs -> Click on Security

• Security groups

• Add inbound traffic.

  Type	Port range	Source
  Custom TCP	8080	Anywhere-IPv4

Login to Jenkins using the below URL:

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http://ec2-instance-public-ip-address:8080 [You can get the ec2-instance-public-ip-address from your AWS EC2 console page]

After you login to Jenkins,

• Run the command to copy the Jenkins Admin Password - sudo cat /var/lib/jenkins/secrets/initialAdminPassword
• Enter the Administrator password
• Click on Install suggested plugins
• Wait for the Jenkins to Install suggested plugins
• Create First Admin User or Skip the step [If you want to use this Jenkins instance for future use-cases as well, better to create admin user]
• Jenkins Installation is Successful. You can now starting using the Jenkins

Install the Docker Pipeline plugin in Jenkins:

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• Log in to Jenkins.
• Go to Manage Jenkins > Manage Plugins.
• In the Available tab, search for "Docker Pipeline".
• Select the plugin and click the Install button.
• Restart Jenkins after the plugin is installed.(To restart jenkins just add /restart at the url example:http://ec2-instance-public-ip-address:8080/restart)
• Wait for the Jenkins to be restarted.

Docker Slave Configuration

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Run the below command to Install Docker

sudo apt update
sudo apt install docker.io

Grant Jenkins user and Ubuntu user permission to docker deamon.

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sudo su - 
usermod -aG docker jenkins
usermod -aG docker ubuntu
systemctl restart docker

Once you are done with the above steps, it is better to restart Jenkins.

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http://<ec2-instance-public-ip>:8080/restart

The docker agent configuration is now successful.

Jenkins pipeline setup

• Create a job

• create pipeline name, select Pipeline and Click on OK

• Go to pipeline

• Select pipeline script from SCM, select SCM as github

• Enter repository URL

  https://github.com/AmanGupta677/node-docker.git
  
  

• edit branch specifier to */main

• Click on Apply and Save

Adding Credentials in Jenkins:

Adding Docker Hub credentials

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• Log in to Jenkins.
• Go to Manage Jenkins > Credentials.
• Click on System
• Click on Global Credentials then Add credentials
• Select Kind as username and password and put your docker hub username and password and on the ID section put docker-cred
• And create

Adding Github Credentials

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• click on Add credentials
• Select Kind as Secret Text and put you Github Token in secret text box and put ID as github
• and create

Now start the pipeline

• Go to Dashboard, click on you pipeline
• click on BUILD NOW

Now you pipeline is created for Continuous Integration