Cloud DNS provides public and private name resolution.
Public hosted zones: Resolve names for internet users. Globally distributed.
Private hosted zones: Resolve only within VPCs. database.internal resolves to private IP.
VPC DNS settings:
- DNS hostnames: Instances get DNS names
- DNS resolution: VPC uses provider DNS
Hybrid DNS:
- Forward on-premises queries to cloud
- Forward cloud queries for on-premises domains
- Resolver endpoints handle forwarding
Health-checked routing: DNS routes based on health checks. Unhealthy endpoints removed automatically.