AWS Elastic Beanstalk Flashcards
1
Q
What is Elastic Beanstalk?
A
- Managed service
- Automatically handles capacity provisioning, load balancing, scaling, application
health monitoring, instance configuration, … - Just the application code is the responsibility of the developer
- Elastic Beanstalk is a developer centric view of deploying an application
on AWS
2
Q
What are the Elastic Beanstalk components?
A
- Application: collection of EB components
- Applicaiton Version
- Environment
3
Q
Whats the lifecycle of EB application?
A
Create app -> upload version -> Launch env -> Manage env -> iterate
4
Q
List some supported EB platform
A
- Go
- Java SE
- Java with Tomcat
- .NET Core on Linux
- .NET on Windows Server
- Node.js
- PHP
- Python
- Ruby
- Packer Builder
- Single Container Docker
- Multi-container Docker
- Preconfigured Docker
5
Q
What are the Environment tier in EB?
A
- web server tier: ELB
- worker tier: SQS Queue
6
Q
Whats the two EB Deployement modes?
A
- Single instance - dev
- High Availability with LB - prod
7
Q
What are the EB Deployment options for Updated?
A
- All at once - fastest, but all instance is down
- Rolling: update few instance, then move to next bucket (not 100% capacity)
- Rolling with additional batches: same as rolling but adds new instances
- Immutable: new instances in new ASG, swap if healty
- Traffic splitting: canary testing - sends small % of traffic to the new deployement
8
Q
List some EB CLI command:
A
- eb create
- eb status
- eb health
- eb events
- eb logs
- eb open
- eb deploy
- eb config
- eb terminate
9
Q
What EB Deployement Proces?
A
- package code as zip
- Console: upload zip file, then deploy
- CLI: create a new app version using CLI, then deploy
10
Q
What is EB Lifecycle Policy?
A
- EB can store max 1000 app vesions
- Based on time
- Based on space
- not used versions are deleted
- Option to not delete the source bundle, stored in S3
11
Q
What are EB Extensions?
A
- Parameters that are set by UI can be configured with code using YAML files
- .ebextions/ directory in the root of source
- YAML/JOSN
- .config extensions
- Resources managed by .ebextension are deleted if the env goes aways
12
Q
What is under the hood of EB?
A
EB is using CloudFormation to setup things.
13
Q
Whats Elastic Beanstalk Cloning?
A
- Clone an environment with the exact same configuration
- Useful for deploying a “test” version of your application
14
Q
What to consider when migrating EB?
A
- After creating an Elastic Beanstalk environment, you cannot change the Elastic Load Balancer type (only the configuration)
- To migrate:
1. create a new environment with the same configuration except LB (can’t clone)
2. deploy your application onto the new environment
3. perform a CNAME swap or Route 53 update
15
Q
Whats the best practice for RDS in EB?
A
The best for prod is to separately create an RDS database and provide our EB application with the connection string
