Amazon Route 53

 Amazon Route 53


What is DNS ?

DNS stands for Domain Name Service. In basic terms DNS allows you to quickly lookup the IP address of given domain. This information is located in the zone files of Domain Name server. These dedicated server's main responsibility is to provide DNS record of given domain.

There are different variety records listed below, and each one of them serves different purpose.

 

Let's use commandline tool called "nslookup" to perform name service lookup.




Amazon Route 53 - is AWS's one of main component mainly deals with DNS.
Main things it can do :
  • Domain registration.
  • Creating public and private zone files.
  • Health checks (If the resources are deployed across different regions, and any  resource not sending healthy response redirect users to other region or resource)

There are some routing policies :

  • Simple - Just provides simple DNS response (record)
  • Failover - If primary destination is down then redirect to secondary.
  • Geolocation - Direct users based on their location to the closest.
  • Geoproximity - Routes to the closest region within geographic area.
  • Latency - Directs to the lowest latency route resouces.
  • Multivalue answer - Returns multiple IP address (simple load balancer)
  • Weighted - Uses relative weights for routing.
  • IP based - Routes based on the IP address.






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