No mDNS records are published

[PAI5REECHO]

In my external-dns Pod logs it is correctly reporting/publishing the mDNS records I want for the Ingresses I have configured in my cluster, but no mDNS records are ever actually published over the network. I captured all the IGMP & UDP port 5353 traffic from my K8s node running external-mdns with tcpdump -i any 'udp port 5353 or igmp' -w /tmp/mdns.pcap and all I see are some IGMP membership report packets being sent out but nothing else (nothing on mDNS ports).

[nlflint]

Does your external-mDNS deployment/pod have hostNetwork: true? It needs access to the nodes host interface for the multicast packets to leave the cluster.

[tdrozdowski]

I've run into this same thing using microk8s in strict mode - I see its creating the entry and I have hostNetwork: true but no dice.

2024/12/15 20:25:26 Added 1.0.0.127.in-addr.arpa. 120 IN PTR grafana.lab1.local.