Step 1 - Create Two IAM roles as:

1. In first provide AmazonEC2RoleforAWSCodeDeploy and AmazonS3FullAccess

2. In second provide codedeplyrole role. => ASG

This roles will be used further.

Step 2 - Create 4 ec2 instances and put user data in it

#!/bin/bash

sudo apt-get update -y

sudo apt-get install awscli -y

sudo apt-get install ruby -y

sudo apt-get install wget -y

wget https://aws-codedeploy-us-east-1.s3.us-east-1.amazonaws.com/latest/install

chmod +x ./install

sudo ./install auto

sudo hostname Deploy && sudo su - ubuntu

sudo yum update -y

sudo yum install awscli -y

sudo yum install ruby -y

sudo yum install wget -y

wget https://aws-codedeploy-us-east-1.s3.us-east-1.amazonaws.com/latest/install

chmod +x ./install

sudo ./install auto

This user data includes installation of some software like awscodedeploy , awscli etc.

Then:

- Add first IAM role to the instances .

- Create Security Group and provide http 80 and ssh 22 rules.

- Then create instances.

Step 3 - Create an AMI of any of the instance which we will use in AutoScalingGroup.

Step 4 - Create Application Load Balancer.

1. Create target group than load balancer , in target group give path to /index.html , which is the app file containing code over git.

2. Now Create Application Load Balancer

Step 5 - Create 'Launch Configurations' or 'Launch template' and than create Auto scaling group.

Launch Configuration created Now create AutoScalingGroup

Attach Application Load Balancer to it which is already created

Give Desired and max capacity to 2

Auto Scaling Group is created.

We can see as soon as ASG created , the two instances are up.

Step 6 - Create one Jenkins Instance and install jenkins software in it.

Step 7 - Create CodeDeploy

Create Application

Now Create Deployment Group

Enter ARN of the '2nd role'

Now Choose Amazon Ec2 ASG which we have Created earlier

Now choose Application Load balancer which we have created earlier

Deployment Group Is Created.

Now we will use Jenkins for Creating a pipeline that will use git as a source and will run the CodeDeploy

Step 8 - Create an S3 bucket

Step 9 - Go to Jenkins Server

- Install 'AWS CodeDeploy' and' AWS CodePipeline' plugin in it

https://github.com/vaibhavjain2099/aws_codedeploy_using_github.git

Create a jenkins pipeline by taking GIT as a source , Trigger - Poll SCM ( * * * * * ) which means it will run job in every minute.

Fill in the neccessary details like:

- Application name

- Application group

- Application deployment config

- Put S3 Bucket name etc.

Therer is just so much to consider here. But we are finally here, THANK GOD!!