My First DevOps Project On- Jenkins CICD with GitHub Integration

Jenkins CICD with GitHub Integration

Step 1) Create AWS EC2 instance - Jenkins_server

********Install and configure Jenkins**********

sudo apt-get update

sudo apt install openjdk-11-jre

sudo wget -O /usr/share/keyrings/jenkins-keyring.asc https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key

sudo wget -O /usr/share/keyrings/jenkins-keyring.asc https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key

echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] https://pkg.jenkins.io/debian-stable binary/ | sudo tee /etc/apt/sources.list.d/jenkins.list > /dev/null

sudo apt-get update

sudo apt install openjdk-11-jre

sudo apt-get update

sudo apt install openjdk-11-jre

sudo apt-get install jenkins

sudo apt-get update

jenkins --version

sudo systemctl enable jenkins

sudo systemctl start jenkins

sudo systemctl status jenkins

sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Enable 8080 port on EC2 server

Copy admin password and paste it on Jenkins --> 3.25.221.181:8080

Install suggested plugins

User name: jnanny

Password : Jnanny@95

New Item

` Name : To-Do Node app

Select Freestyle project

Description

This is to-do node app

Select Github Project

Project URL : https://github.com/JnaneshJnanny/node-todo-cicd.git

Source code Management

Git [*]

Repository URL

https://github.com/JnaneshJnanny/node-todo-cicd.git

Create SSH key in jenkins server

sshkey-gen

cat /home/ubuntu/.ssh/id_rsa.pub

Copy public key

Add public key in to gihub account

Profile --> Settings --> SSH and GPG Keys --> New SSH key --> Title : Jenkins project

Paste public key

sdifsf3238479423423

Jenkins Credentials Provider: Jenkins

Add Credentials

Select Jenkins

Kind: SSH User name and private key

ID : github-kenkins

Description : Jenkins and github integration

User name : ubuntu

Private Key

Enter directly : Paste

cat /home/ubuntu/.ssh/id_rsa

Copy entire private key

Add

Credentials : Select added one

Branches to build

Branch Specifier (blank for 'any') : master/main (check your branch name)

Click Save

Build now : Build will successful

Now configure and to-app in jenkins manual method :

Check read me file in repository

Run these commands:

sudo apt install nodejs

sudo apt install npm

npm install

npm install express

Go to path : cd /var/lib/jenkins/workspace/To-Do Node app

node app.js

https://3.25.221.181:8000/

Add 8000 port in jenkins server

*****************Automating with docker *************

Install Docker on jenkins server

sudo apt install docker.io

vi Dockerfile

FROM node:12.2.0-alpine

WORKDIR app

COPY . .

RUN npm install

RUN npm run test

EXPOSE 8000

CMD ["node","app.js"]

sudo docker build . -t to_do_app

docker images

sudo docker run -d --name node-todo-app -p 8000:8000 22a4f11408ee (Docker ID)

sudo docker ps

Open in Browser : https://3.25.221.181:8000/todo

Stop or kill running container

**********Congrats your app is running through docker**********************

Now automate with jenkins

Jenkins---> Dashboard --> To-Do Node app -- >Configuration --> Build environment

Add build step --> Execute shell --> Save

For Permission denied error : Run this in jenkins server:

sudo usermod -a -G docker jenkins

sudo systemctl restart jenkins

Build Now

Error will resolve now

Note: remove all existing container befire build

**********Now automate with github (No need to build manually) ****************

Whenever developer push the code , That will build automatically using WEBHOOK

Install github integration plugin in jenkins

Manage jenkins --> Plugins --> available plugins -- > github integration --> Install

Go to guthub repo--> Settings --> webhooks (Before check ssh key presence)

Webhook --> Add webhook --> payload URL :https://3.25.221.181:8080/github-webhook/ (jenkins) --> Add webhook

Content type : Application JSON

******************Configure Jenkins again***********************

To-do-node app --> Configure -- > Build trigger --> GitHub hook trigger for GITScm polling [*] --> Save

Now make some changes in code to check

Go to repo --> views/todo.ejs --> Made some chnages in title --> Commit changes