Day #25: Complete Jenkins CI/CD Project - Continued with Documentation

Introduction:

In this blog, we will delve into the step-by-step process we've covered up to Day 24 of our Jenkins CI/CD project. For a quick reference to our previous blogs, you can find them [here].

Steps for Jenkins CI/CD Project

Create a Repository on GitHub:

• Set your email and username.

• Clone the repository, add files, commit changes, and push to GitHub.

# For setting username and email id.
git config --global user.email "your email id"
git config --global user.name "Your name"
git config --global --list -> List all the git config properties

# For cloning the repository.
git clone <Your repo URL>

 #For making this Repo as a git Repo.
 git init

 #For adding files.
 git add <filename>

 #For commiting your changs.
 git commit -m "message"

 #For pushing your local changes to remote repository.
 git push origin <branchname>

Launch an EC2 Instance:

• Install required software on your instance (docker, docker-compose, java, Jenkins).

# For installing docker
sudo apt-get update && sudo apt-get install docker.io

 #For installing docker compose
 sudo apt-get install docker-compose

 #For installing java
 sudo apt install openjdk-11-jre

 #For adding the Jenkins repository key to the system
 curl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee \
   /usr/share/keyrings/jenkins-keyring.asc > /dev/null

 #For adding the Jenkins repository to the package sources
 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

 #For installing Jenkins
 sudo apt-get install jenkins

 #Check whether Jenkins is active or not
 systemctl status jenkins

Add User to the "docker" Group:

sudo usermod -aG $USER docker

Set Permissions for Docker:

sudo chown $USER /var/run/docker.sock
sudo chmod 777 /var/run/docker.sock

Build Docker Image and Run Container:

docker build Dockerfile -t <appname>
docker run -d -p hostport:containerport <imagename>

To see the list of images

docker images

Now, to run a container using your image

To see the running containers

docker ps
docker ps -a -> For all containers whether it is running or exited or stopped.

Set up Inbound Rules in Security Group:

• Allow specific ports for accessing the application via browser.

Use Docker-Compose to Manage Application:

docker-compose up
docker-compose down

Configure Jenkins:

• Access Jenkins on port 8080 via your browser.

• Follow the link [Setting up Jenkins](Setting up Jenkins) for detailed instructions.

Create Jenkins Job:

• Follow the link [First Freestyle Job](First Freestyle Job) for a guide on creating your Jenkins job.

Integrate GitHub with Jenkins:

• Configure Webhooks in GitHub to trigger Jenkins jobs.

• Add webhook functionality to your Jenkins job.

Test CI/CD Pipeline:

• Make changes to your GitHub repo.

• Observe Jenkins job getting triggered.

Conclusion

This comprehensive documentation provides a detailed walkthrough of setting up a Jenkins CI/CD project using GitHub and Docker commands. ✅

Automate your software delivery pipeline by creating Jenkins jobs, ensuring consistent and reliable deployment. Jenkins orchestrates the entire process, streamlining development workflows and enhancing efficiency.