High Availability Architecture with AWS CLI

The architecture includes-
- Webserver configured on EC2 Instance
- Document Root(/var/www/html) made persistent by mounting on EBS Block Device.
- Static objects used in code such as pictures stored in S3
- Setting up Content Delivery Network using CloudFront and using the origin domain as S3 bucket.
- Finally, place the Cloud Front URL on the web app code for security and low latency.

So Let's understand the basic terms:

AWS

Amazon Web Services (AWS) is the world’s most comprehensive and broadly adopted cloud platform, offering over 175 fully-featured services from data centers globally. Millions of customers — including the fastest-growing startups, largest enterprises, and leading government agencies — are using AWS to lower costs, become more agile, and innovate faster.

AWS CLI

The AWS Command Line Interface (CLI) is a unified tool to manage your AWS services. With just one tool to download and configure, you can control multiple AWS services from the command line and automate them through scripts.

EBS

Amazon Elastic Block Store (EBS) is an easy-to-use, high-performance block storage service designed for use with Amazon Elastic Compute Cloud (EC2) for both throughput and transaction-intensive workloads at any scale.

S3

Object storage built to store and retrieve any amount of data from anywhere. Get started with Amazon S3. Request more information. Amazon Simple Storage Service (Amazon S3) is an object storage service that offers industry-leading scalability, data availability, security, and performance.

CloudFront

Amazon CloudFront is a fast content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally with low latency, high transfer speeds, all within a developer-friendly environment.

Step1: Webserver configured on EC2 instance

aws ec2 help

aws ec2 run-instances — image-id ami-010aff33ed5991201 — instance-type t2.micro — count=1 — subnet-id subnet-381f6574 — security-group-ids sg-0e0578030b5a1310 — key-name RHkey

Launching an instance by CLI

Instance launched

Start the HTTPD services

install httpd service

yum install httpd

systemctl start httpd

Step2: Creating EBS volume and attaching it to /var/www/html

aws ec2 create-volume — availability-zone ap-south-1b — size 1

Creating EBS volume

EBS volume created

aws ec2 attach-volume — volume-id vol-01a2b7da7a7bf8bc7 — instance-id i-014f643d7a94d773f— device=/dev/sdf

Attaching EBS volume to EC2 instance

Volume attached

Create Partition

fdisk /dev/xvdf

Creating Partition

Partition created

Formating partition

mkfs.ext4 /dev/xvdf1

partition formatted

Mount this storage (/dev/xvdf1) to var/www/html file

mount /dev/xvdf1 /var/www/html

Step3: Creating S3 bucket to store static object

aws s3api create-bucket — bucket srish— region ap-south-1 — create-bucket-configuration LocationConstraint-ap-south-1

Step4: Creating CloudFront

aws cloudfront create-distribution — origin-domain-name srish.s3.amazonaws.com

Step5: Place the Cloud Front URL on the
webapp code for security and low latency

Thank you!