Web Tier Environment

o This application hosted on the Web Server Environment handles the

HTTP and HTTPS requests from the users.

o Beanstalk Environment: When an environment is launched, Beanstalk

automatically assigns various resources to run the application

successfully.

o Elastic Load Balancer: Request is received from the user via Route53

which forwards the request to ELB. Then ELB distributes the request

among various EC2 Instances of the Autoscaling group.

o Auto Scaling Group: Auto Scaling will automatically add or remove

EC2 Instance based on the load in the application.

o Host Manager: Software components inside every EC2 Instance

which is responsible for the following:

▪ Log files generation

▪ Monitoring

▪ Events in Instance

Web tier Environment

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● Worker Environment

○ A worker is a background process that helps applications for handling

heavy resource and time-intensive operations.

○ It is responsible for database clean up, report generation that helps to

remain up and running.

○ In the Worker Environment, Beanstalk installs a Daemon on each EC2

Instance in the Auto Scaling Group.

○ Daemon pulls requests from the SQS queue and executes the task

based on the message received.

○ After execution, SQS will delete the message, and in case of failure, it

will retry to send the message