ExternalDNS v0.15.1 does not support --target as a CLI flag.
Remove the extraArgs stanza from external-dns-cloudflare values.yaml
and instead add the target annotation directly on the CouchDB ingress:
external-dns.alpha.kubernetes.io/target: ingress.mk-labs.cloud
This achieves the same result (Cloudflare CNAME -> ingress.mk-labs.cloud)
without crashing the controller.