AWS Elastic Beanstalk

Question 1

Elastic Beanstalk

Answer 1

Managed service that automatically handles capacity provisioning, load balancing, scaling, application health monitoring, etc

Question 2

Beanstalk components

Answer 2

Application, application version, environment (collection of AWS resources running an application version)

Question 3

Single instance deployment modes

Answer 3

One EC2 instance with elastic IP, good for dev purposes

Question 4

High availability with load balancer deployment mode

Answer 4

Multi AZs, ALB, good for prod

Question 5

All at once deployment option

Answer 5

Fastest but instances are available to serve traffic for a bit (downtime)
all v1 –> all down –> all v2

Question 6

Rolling deployment option

Answer 6

Update a few instances at a time and then move to next bucket once the first bucket is healthy
v1 –> first two instances stopped –> first two instances updated –> next 2 updated –> all are v2
long deployment
running under capacity

Question 7

Rolling with additional batches deployment option

Answer 7

Spins up new instances to roll the batch (so old application still available)
Application running at or over capacity, runs both v1 and v2 versions simultaneously
Good for prod
small additional cost

Question 8

Immutable deployment option

Answer 8

Spins up new instances in a new ASG, deploys version to these instances, then swaps all instances when everything is healthy
zero downtime, longest deployment, high cost, double capacity
quick rollback in case of failures

Question 9

Blue Green deployment option

Answer 9

Create a new environment and switch over when ready
zero downtime
can use route 53 to route traffic

Question 10

Traffic splitting deployment option

Answer 10

Canary testing, send a small % of traffic to new deployment

Question 11

Beanstalk Lifecycle Policy

Answer 11

Based on time (old versions removed) or based on space (when you have too many versions), remove old application versions, can store 1000 at most and wont be able to deploy anymore if you hit that limit

Question 12

Elastic Beanstalk extensions

Answer 12

AWS Elastic Beanstalk extension files are configuration files used to customize and manage various aspects of an Elastic Beanstalk environment

Question 13

Elastic beanstalk cloning

Answer 13

Clone an environment with the exact same configuration, can change settings after cloning eg. useful for deploying a test version of your application

Question 14

Elastic beanstalk load balancer migration

Answer 14

1. create new env with same config except the load balancer as we cant clone it 2. deploy app to new env 3) perform CNAME swap or Route 53 update

Question 15

RDS with elastic beanstalk decoupling

Answer 15

Best for prod is separately create RDS database and provide beanstalk application with the connection string

Question 16

When creating configuration files for AWS Elastic Beanstalk which naming convention should you follow?

Answer 16

.ebextensions/<mysettings>.config</mysettings>