EB.md

Elastic Beanstalk

Overview

• supports
  • Java,
  • .NET
  • php
  • Node.js
  • Python
  • Ruby
  • Go
  • Docker
  • platforms (Tomcat, Passenger, Puma, IIS)
• handles deployment, capacity planning, load balancing, auto-scaling and application health
• runs from S3 bucket
• fastest way to deplay application to AWS
• control EC2 yourself or allow ELB to control EC2 resources
• integrated with CloudWatch and X-Ray

Deployment Policies

• all at once
  • new verions to all instances
  • causes down time
  • failed updates require redeploy of prior verions
  • (use in test/dev)
• rolling
  • deploys in batches
  • failed updates require rolling update of prior version
  • not for performance sensitive systems
• rolling with additional batch
  • maintains full capacity
  • adds instances that are updated
  • full capacity/no downtime/no performance degredations
• immutable
  • deploys to fresh auto scaling group of instances
  • pass health checks, moved to existing auto scaling group
  • preferred for mission critical production systems

Configuration

• saved in .ebextensions folder in top level of zip/S3
• .config files in folder

RDS

• launch RDS instance within EB
  • good for devb/test
  • RDS coupled EB, delete of EB environment deletes RDS instances
• Normal RDS instance
  • Add RDS security group to EB auto scaling group
  • provide RDS connection string to application servers using EB environment properties