Issue Using Consul with NGINX Ingress Controller and hostNetwork: true on Kubernetes

[arezvani]

Hello,

I am encountering an issue when trying to use Consul with the NGINX Ingress Controller on Kubernetes with hostNetwork: true. The configuration works as expected when hostNetwork: false is used, but when enabling hostNetwork: true, there seems to be an issue with the communication between Consul and other services in the cluster.

When I enable hostNetwork I get this error and also suddenly I can’t ssh to workers untill reboot them.

2025-02-22T15:32:02.099Z [ERROR] consul-server-connection-manager: connection error: error=“failed to discover Consul server addresses: failed to resolve DNS name: consul-server.consul.svc: lookup consul-server.consul.svc on 10.96.0.10:53: read udp 192.168.91.1:35241->10.96.0.10:53: i/o timeout”