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49 lines
1.8 KiB
Markdown
49 lines
1.8 KiB
Markdown
# Ingress source
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The ingress source creates DNS entries based on `Ingress.networking.k8s.io` resources.
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## Filtering the Ingresses considered
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The `--ingress-class` flag filters Ingress resources by a set of ingress classes.
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The flag may be specified multiple times in order to
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allow multiple ingress classes.
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This source supports the `--label-filter` flag, which filters Ingress resources
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by a set of labels.
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## Domain names
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The domain names of the DNS entries created from an Ingress are sourced from the following places:
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1. Iterates over the Ingress's `spec.rules`, adding any non-empty `host`.
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This behavior is suppressed if the `--ignore-ingress-rules-spec` flag was specified
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or the Ingress had an
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`external-dns.alpha.kubernetes.io/ingress-hostname-source: annotation-only` annotation.
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2. Iterates over the Ingress's `spec.tls`, adding each member of `hosts`.
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This behavior is suppressed if the `--ignore-ingress-tls-spec` flag was specified
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or the Ingress had an
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`external-dns.alpha.kubernetes.io/ingress-hostname-source: annotation-only` annotation,
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3. Adds the hostnames from any `external-dns.alpha.kubernetes.io/hostname` annotation.
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This behavior is suppressed if the `--ignore-hostname-annotation` flag was specified
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or the Ingress had an
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`external-dns.alpha.kubernetes.io/ingress-hostname-source: defined-hosts-only` annotation.
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4. If no DNS entries were produced for an Ingress by the previous steps
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or the `--combine-fqdn-annotation` flag was specified, then adds hostnames
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generated from any`--fqdn-template` flag.
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## Targets
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The targets of the DNS entries created from an Ingress are sourced from the following places:
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1. If the Ingress has an `external-dns.alpha.kubernetes.io/target` annotation, uses
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the values from that.
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2. Otherwise, iterates over the Ingress's `status.loadBalancer.ingress`,
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adding each non-empty `ip` and `hostname`.
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