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external-dns/docs/registry/registry.md
John Gardiner Myers 40ed5e03b6 Improve registry documentation
2023-06-01 21:35:00 -07:00

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Registries

A registry persists metadata pertaining to DNS records.

The most important metadata is the owning external-dns deployment. This is specified using the --txt-owner-id flag, specifying a value unique to the deployment of external-dns and which doesn't change for the lifetime of the deployment. Deployments in different clusters but sharing a DNS zone need to use different owner IDs.

The registry implementation is specified using the --registry flag.

Supported registries

  • txt (default) - Stores in TXT records in the same provider
  • noop - Passes metadata directly to the provider. For most providers, this means the metadata is not persisted.
  • aws-sd - Stores metadata in AWS Service Discovery. Only usable with the aws-sd provider.