Summary
OCI DNS can direct traffic to various different end-points based upon predefined rules to cater for failures, origin of requestor, and load-balancing.
Reference
DNS
Domain Name System (DNS) is the hieracrhical and decentralised naming system. DNS associate domains with other forms of information as well as IP addresses.
OCI DNS Capabilities
The OCI DNS tool can:
- Create and manage zones
- Create and manage records
- Import zone files
Traffic Management
Traffic management components are:
- Steering policies
- Attachments
- Rules
- Answers
Configure Routing Policies
The dynamic DNS responses allow for routing policies.
Serve Intelligent Responses to DNS Queries
Instead of a static response to a DNS query, OCI DNS returns differing endpoints (IP addresses) based on the following criteria.
Define Logic in Steering Policy
Traffic management steering policies types are:
- Load Balancer distributes traffic over several servers.
- Failover redirects traffic when primary is unavailable
- Geolocatiion routes traffic based on geographic conditions
- ASN routes traffic based on originating ASN number
- IP Prefix routes traffic based on originating IP prefix
Serve Different Endpoints
Different end-points can be served by DNS responses based on various criteria (see above for examples).