Application Recovery Controller
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3h 55m

This section of the AWS Certified Solutions Architect - Professional learning path introduces you to the core networking concepts and services relevant to the SAP-C02 exam. We start with an introduction to the AWS Virtual Private Network (VPC) and networking services. We then understand the options available and learn how to select and apply AWS networking, DNS, and content delivery services to meet specific design scenarios relevant to the AWS Certified Solutions Architect - Professional exam. 

Want more? Try a Lab Playground or do a Lab Challenge

Learning Objectives

  • Get a foundational understanding of VPCs, their security, and connectivity
  • Learn about VPC sharing using the AWS Resource Access Manager
  • Discover inter-regional and intra-regional communication patterns in AWS
  • Learn about AWS Direct Connect, along with its implementation, configuration, and connectivity options
  • Understand routing in AWS, including static and dynamic routing
  • Understand the basics of networking, including Elastic IP addresses, Elastic Network Interfaces, networking with EC2, VPC endpoints, and AWS Global Accelerator
  • Learn about the DNS and content delivery services Amazon Route 53 and Amazon CloudFront

Route 53 application recovery controller is a set of capabilities that continuously monitors an application’s ability to recover from failures and controls application recovery across multiple availability zones, regions, and possibly your own data center environments. 

You can define a readiness check to monitor AWS resource configurations, capacity, and network routing policies. They can check the configuration of Auto Scaling Groups, Amazon EC2 instances, Amazon EBS volumes, Elastic Load Balancers, RDS instances, and DynamoDB tables among others.  

These readiness checks ensure that the recovery environment is scaled and configured to take over when needed. You can check AWS service limits to verify that enough capacity can be deployed.   You can also verify that capacity and scaling setups for applications are exactly the same across regions before a failover takes place. 

Readiness Checks work with Routing Controls to give you a way to failover an entire application based on custom conditions like application metrics, partial failures, increased error rates, or latency. You can also failover manually.   With Routing Controls you can shift traffic for maintenance purposes or during a real failure scenario. You can also apply safety rules to routing controls as a way to prevent a failover to an unprepared replica.  

A control panel is a group of routing controls for an application. As mentioned earlier, A routing control is used to turn traffic flow ON or OFF to individual cells in Regions or Availability Zones.  

This will permit you to define custom traffic re-direction for your applications during failover or maintenance cycles.  Amazon Route 53 Application recovery controller allows you to configure fine-grain failover and verification steps to implement applications requiring very high availability.  

This concludes our introduction to Amazon Route 53. 

About the Author
Learning Paths

Danny has over 20 years of IT experience as a software developer, cloud engineer, and technical trainer. After attending a conference on cloud computing in 2009, he knew he wanted to build his career around what was still a very new, emerging technology at the time — and share this transformational knowledge with others. He has spoken to IT professional audiences at local, regional, and national user groups and conferences. He has delivered in-person classroom and virtual training, interactive webinars, and authored video training courses covering many different technologies, including Amazon Web Services. He currently has six active AWS certifications, including certifications at the Professional and Specialty level.