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siderolabs / talos

Talos Linux is a modern Linux distribution built for Kubernetes.
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Talos Host DNS issue #9191

Closed raydenz closed 2 months ago

raydenz commented 2 months ago

hello,

I am running Talos 1.7 on docker + cilium 1.14.8 : 1 control plane + 2 workers I activated the HOST DNS feature (in docker mode talos ask me to do so)

machine:
  features:
    hostDNS:
      enabled: true
      forwardKubeDNSToHost: true

https://www.talos.dev/v1.7/talos-guides/network/host-dns/

Bug Report

BUG : coredns pods can't reach host-dns

│ [ERROR] plugin/errors: 2 8548346077399810105.4798626237678217664. HINFO: read udp 10.244.1.237:47221->10.96.0.9:53: i/o timeout            │
│ [INFO] 10.244.1.55:36121 - 27217 "AAAA IN grafana.com. udp 40 false 1232" - - 0 2.000855639s                                               │
│ [ERROR] plugin/errors: 2 grafana.com. AAAA: read udp 10.244.1.237:43238->10.96.0.9:53: i/o timeout                                         │
│ [INFO] 10.244.1.55:57867 - 10742 "AAAA IN grafana.com. udp 40 false 1232" - - 0 2.001262023s                                               │
│ [ERROR] plugin/errors: 2 grafana.com. AAAA: read udp 10.244.1.237:43624->10.96.0.9:53: i/o timeout                                         │
│ [INFO] 10.244.1.55:56508 - 7879 "A IN grafana.com. udp 40 false 1232" - - 0 2.000621806s                                                   │
│ [ERROR] plugin/errors: 2 grafana.com. A: read udp 10.244.1.237:56486->10.96.0.9:53: i/o timeout

i see a SVC named host-dns with this IP (10.96.0.9)

╰─ k get svc host-dns
NAME       TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE
host-dns   ClusterIP   10.96.0.9    <none>        53/UDP,53/TCP   21m

but there are no endpoints

smira commented 2 months ago

As you don't specify the details, I'd assume it's a duplicate of https://github.com/siderolabs/talos/issues/8836#issuecomment-2158601983