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ALIAS Records
ALIAS records are not widely standardized across DNS providers. Some (Route 53, DNSimple) have a native ALIAS record type. Others (Cloudflare) implement transparent CNAME flattening.
DNSControl adds an ALIAS record type, and leaves it up to the provider implementation to handle it.
A few notes:
- 1.A provider must "opt-in" to supporting ALIAS records. When registering a provider, you specify which capabilities you support. Here is an example of how the cloudflare provider declares its support for aliases:
func init() {
providers.RegisterDomainServiceProviderType("CLOUDFLAREAPI", newCloudflare, providers.CanUseAlias)
}
- 1.If you try to use ALIAS records, all dns providers for the domain must support ALIAS records. We do not want to serve inconsistent records across providers.
- 2.CNAMEs at
@are disallowed, but ALIAS is allowed. - 3.Cloudflare does not have a native ALIAS type, but CNAMEs behave similarly. The Cloudflare provider "rewrites" ALIAS records to CNAME as it sees them. Other providers may not need this step.
- 4.Route 53 requires the use of R53_ALIAS instead of ALIAS.
- 5.Azure DNS requires the use of AZURE_ALIAS instead of ALIAS.
Last modified 10mo ago