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add documentation about canonical hosted zones

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Jeff Wenzbauer 2023-02-22 13:45:19 -07:00
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docs/tutorials/aws.md
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@ -837,6 +837,14 @@ You can configure Route53 to associate DNS records with healthchecks for automat
Note: ExternalDNS does not support creating healthchecks, and assumes that `<health-check-id>` already exists.
## Canonical Hosted Zones
When creating ALIAS type records in Route53 it is required that external-dns be aware of the canonical hosted zone in which
the specified hostname is created. External-dns is able to automatically identify the canonical hosted zone for many
hostnames based upon known hostname suffixes which are defined in [aws.go](../../provider/aws/aws.go). If a hostname
does not have a known suffix then the suffix can be added into `aws.go` or the [target-hosted-zone annotation](#target-hosted-zone)
can be used to manually define the ID of the canonical hosted zone.
## Govcloud caveats
Due to the special nature with how Route53 runs in Govcloud, there are a few tweaks in the deployment settings.