Elastic Beanstalk (EB)

Question 1

Which kind of EB environment uses an ELB?

Answer 1

Web Environment

• Elastic Beanstalk environments:
  
  • Web environment
    
    • Load balanced Environment
      
      • ELB → ASG → Instances
    • Single instance Environment
      
      • Public IP → ASG → Instace (1)
  • Worker environment
    
    • SQS → ASG → Instances

Question 2

Which kind of EB environment uses an auto scaling group?

ASG

Answer 2

• All of them

- Both (Worker E. and Web E.)

Question 3

The 2 kinds of Elastic Beanstalk environments

Answer 3

Web Environments & Worker Environments

Question 4

Which EB web environment type requires a public IP address?

Answer 4

Single-Instance Environment

Question 5

Which EB web environment type is best designed to easily scale?

Answer 5

Load Balanced Environment

Question 6

The 2 types of EB Web environments

Answer 6

Single-Instance Environment & Load Balanced Environment

Question 7

Which 2 deployment policies support a single instance environment?

Answer 7

Immutable (ɪmˈjutəbəl)

All at once

Question 8

The 4 types of deployment policies available for Elastic Beanstalk

Answer 8

All at once, Rolling, Rolling with additional batch, Immutable

Question 9

How would you recover from a failed, all at once, deployment? What do you have to do to rollback manually?

Answer 9

Re-deploy the old version again to all instances

Question 10

This EB deployment policy takes all instances out of service while the deployment processes

Answer 10

All at once deployment

Question 11

How would you handle a failed Rolling with additional batch deployment?

One answer

Answer 11

Perform an additional rolling update to roll back changes

Question 12

This EB deployment policy creates then replaces your instances in small groups ensuring application capacity is never reduced

Answer 12

Rolling with additional batch

Question 13

Which of the deployment methods have a manual roll back process?

Answer 13

1- All at once
2- Rolling with additional batch
3- Rolling

• If you want to roll back an Immutable deployment you need to terminate new instances
• If you want to roll back a Blue/Green deployment you need to swap URL

Question 14

Which deployment method do perform a DNS change during deployment?

Answer 14

Blue/Green is when deployments swap environments and it ocurrs at the DNS level

Question 15

By default what kind of updates does EB perform?

Answer 15

In-Place

Immutable Is consider an In-Place deployment because you have a route 53 and an environment and inside that environment you have an ELB and some instances, That means the deployment happens within your environment when you swap the traffic at the Load Balancer

With Blue / Green, There is a change at the DNS level (Route 53), in that moment you have two environments

Question 16

With blue/green deployment where must your database be stored?

Answer 16

Outside of your EB environment

Question 17

What is the name of the hidden folder in your EB project that stores configuration files?

Answer 17

.ebextensions

Question 18

What are some common things you would set with EB configuration files?

Linux / Windows Server Configuration

EB Option Settings

IAM User Passwords

Custom Resources

Answer 18

Linux / Windows Server Configuration

EB Option Settings

Custom Resources

Question 19

What are some of the keys would you find in an environment manifest file?

There are only six elements in the answer.

Answer 19

• Platform: The Amazon Resource Name (ARN) (PlatformArn: …:us-east-2::platform/Java 8 running…)
• SolutionStack: The full name of the solution stack used to create the environment (64bit Amazon…)
• OptionSettings: Configuration option settings to apply to the environment (InstanceType: t2.micro)
• Tags: Up to 47 tags
• EnvironmentTier: The type of environment to create (Name: Worker)
• EnvironmentName: The name of the environment to create

Question 20

Where do you need to store your environment manifest (env.yml) file?

Answer 20

In the root of your EB project

Question 21

This special file is stored in the root of an EB project folder and contains important information about the projects environment

Answer 21

Environment Manifest (env.yml)

Question 22

What are some common Server Configurations you can customize with EB configuration files?

Packages

AWS Accounts

Users

Container Commands

Answer 22

Packages

Users

Container Commands

Question 23

What is the EB CLI command to initialize a new EB project directory?

eb create

eb deploy

eb init

eb open

Answer 23

eb init

Question 24

What is the EB CLI command for viewing the health status (ˈstætəs) of your environment?

eb health

eb monitor

eb create

eb status

Answer 24

eb status

Question 25

What are some (2) benefits of using a custom image for EB?

Cheaper than the default AMI

Improved provisioning time for new instances

More secure than the default AMI

Allows you to install a lot of additional software

Answer 25

Allows you to install a lot of additional software

Improved provisioning time for new instances

Question 26

How does Immutable work?

Answer 26

It creates the same amount of servers, and switches all at once to new servers, removing old servers

Question 27

What does deployment policy require an ELB? (There are 4 deployment policies)

Answer 27

Rolling deployment polices require an ELB

Rolling cannot be used with Single-Instance Web Environments because it doesn’t have an ELB

Question 28

What is Elastic Beanstalk?

What are its 3 key features?

Answer 28

• It’s a service for deploying and scaling web applications and services without thinking about the infrastructure
• Type of environments (Web and Worker)
• Deployment methods (All at once, Rolling…)
• Rollback process (Manual, Terminate new, swap URL)