AWS学习笔记（十一）：Classic Solutions Architecture

Instantiating Applications quickly

• EC2 Instances:
  • Use a Golden AMI: Install your applications, OS dependencies etc.. beforehand and launch your EC2 instance from the Golden AMI
  • Bootstrap using User Data: For dynamic configuration, use User Data scripts
  • Hybrid: mix Golden AMI and User Data (Elastic Beanstalk)
• RDS Databases:
  • Restore from a snapshot: the database will have schemas and data ready!
• EBS Volumes:
  • Restore from a snapshot: the disk will already be formatted and have data!

Elastic Beanstalk – Overview

• Elastic Beanstalk is a developer centric view of deploying an application on AWS
• It uses all the component's we've seen before: EC2, ASG, ELB, RDS, …
• Managed service
  • Automatically handles capacity provisioning, load balancing, scaling, application health monitoring, instance configuration, …
  • Just the application code is the responsibility of the developer
• We still have full control over the configuration
• Beanstalk is free but you pay for the underlying instances

Elastic Beanstalk – Components

• Application: collection of Elastic Beanstalk components (environments, versions, configurations, …)
• Application Version: an iteration of your application code
• Environment
  • Collection of AWS resources running an application version (only one application version at a time)
  • Tiers: Web Server Environment Tier & Worker Environment Tier
  • You can create multiple environments (dev, test, prod, …)