Create 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 webapp code for security and low latency.

🔅Configuring webserver :

First create an ec2 instance using aws cli.For creating an instance we need a key,image id(AMI id) remaining options have default values like for instance-type ,default is m1.small

Here is how to configure awscli in command line

aws ec2 run-instances — image-id <AMI-id> — security-group-ids <sg-id> — key-name <ur key> — instance-type t2.micro — count 1

After starting the instance connect to it via any terminal emulator software like putty.Then

yum install httpd

systemctl start httpd

🔅Attaching an EBS volume:

Then attached an EBS volume to the created instance.

aws ec2 attach-volume — device /dev/xvdf — instance-id <id> — volume-id <vol-id>

🔅Mounting document root to EBS volume:

After connecting to the instance install httpd web server and mounted the /var/www/html to EBS volume.

Then transfer a static image to the instance using winscp and move the image to EBS volume (i:e /var/www/html)

🔅Creating a S3 bucket :

aws s3api create-bucket — bucket <name> — create-bucket-configuration LocationConstraint=<region(ap-south-1)>

aws s3 mb <bucket-name>

Then upload the files via cp,mv or sync commands

aws s3 cp<”local-path-to file”> <url of bucket>

🔅Creating Cloud Front web distribution:

Now create a cloud front web distribution as

aws cloudfront create-distribution — origin-domain-name [origin-domain(s3bucketname.s3.amazonaws.com)] >file_name

🔅Configuring webapp for low latency and security:

Now we can use all the static files stored in origin within the webapp along with distribution domain name to acheive low latency.