Question

New k8s cluster with nginx ingress controller displays 1/2 load balancers unhealthy since creation

Created a k8s cluster yesterday with two nodes, and have been using it without issue. Through the portal, I added the nginx ingreess controller. I logged into the DO portal today, and noticed that one of the two load balancers has been unhealthy since the approximate creation time.

I haven’t been able to figure out how to resolve this issue.


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Accepted Answer

The documentation found here: https://www.digitalocean.com/community/tutorials/how-to-set-up-an-nginx-ingress-with-cert-manager-on-digitalocean-kubernetes#step-5-—-rolling-out-production-issuer actually covers the issue in question, albeit slightly further down the article. The file that’s recommended to be applied has a service.spec.externalTrafficPolicy set to Local. This intentionally marks other nodes as unhealthy to optimize network traffic. This value can be changed to Cluster, but may generate unnecessary network hops.

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If it’s the Nginx Ingress controller by Nginx (as in you followed these steps: https://docs.nginx.com/nginx-ingress-controller/installation/installation-with-helm/) then I had a similar issue. I fixed it by changing the installation type to a DaemonSet.

This can be done by setting controller.kind=daemonset in the Helm chart.