Route 53

• Managed by AWS.
• A Domain Name System (DNS)¹.
• Route users to the closest deployment with minimum latency.
• Used for disaster recovery.
• A Domain registration.
• Can help you with health checks to detect unresponsive servers.

DNS Records

Name	Mapped value	Type	IP version
www.x.com	10.76.12.234	A record	4
www.x.com	2001:0db8:0000:0000:0000:7a6e:0680:9668	AAAA record	6
www.x.com	www.twitter.com	CNAME
www.x.com	AWS resource	Alias

How it works

See a more advanced version.

Route 53 routing policies

• Simple routing policy:

  • No health check.

  

• Weighted routing policy:

  • Distributes requests between different EC2 instances. Some sort of load balancing.
  • We assign weight to each EC2 instance and it will redirect requests to each based on the weight.

  

• Latency routing policy:

  • Connects users based on their location to the closest server.

  

• Failover routing policy:

  • Perform health check on the EC2 instances and in case of unhealthy it will redirect requests to the failover instance.

  

1. A collection of rules and records which helps clients to understand how to reach a server through URL. ↩