HA Architecture

Question 1

Elastic Beanstack

Answer 1

Elastic Beanstalk is intended to make developers’ lives easier. CloudFormation is intended to make systems engineers’ lives easier. Elastic Beanstalk is a PaaS-like layer ontop of AWS’s IaaS services which abstracts away the underlying EC2 instances, Elastic Load Balancers, auto scaling groups, etc

Question 2

504 error

Answer 2

means gateway has timeout waiting for app to respond. It could be either the webserver layer, app layer or database layer

Question 3

Load balancers IP address

Answer 3

App and classic lb are given dns names and you are never given an ip address.
Network LB are also given a dns name however you can get an ip address

Question 4

Cross zone load balancing

Answer 4

Enables you to load balance across availability zones

Question 5

Elastic Beanstack functions

Answer 5

You simply upload your app, beanstalk automatically handles capacity provisioning, load balancing, scaling and app health monitoring.