Rancher Helm Install Error about Ingress is Misleading

rancher-ingress-fix.md

rancher Ingress complaining about spec.rules[0].http.paths[0].pathType ?

This took a bit of digging to figure out. As it turns out, my lab ingress has evolved a little. This env may have had several ingress classes in the past.

• alpha env behind a LB with Let's Encrypt enabled
• the error is misleading, the api-resources are OK & pathType IS specified
• helm install works OK but won't touch ingress, keeps status as failed
• even backing up ingress to make it net-new fails

$ helm upgrade rancher rancher-prime/rancher -n cattle-system --reuse-values                                                                                                                                                
Error: UPGRADE FAILED: cannot patch "rancher" with kind Ingress: Ingress.networking.k8s.io "rancher" is invalid: spec.rules[0].http.paths[0].pathType: Required value: pathType must be specified    

Resolution

Add ingress.class=nginx to values.yaml and re-upgrade with helm upgrade -f values.yaml ...

Example ouput of helm get values -n cattle-system rancher ...

USER-SUPPLIED VALUES:
hostname: some-rancher.fqdn.com
ingress:
  class: nginx
... (continues)

Ask your consultant for more information regarding clusters that have been upgraded over longer periods of time.

Yea, it's obviously a result of my environment keeping the same ingress config over the course of many upgrades.
The chart itself has changed to ImplementationSpecific four years ago -

https://github.com/rancher/rancher/blob/release/v2.9/chart/templates/ingress.yaml#L57

It all might be a moot point as Ingress as we know it is frozen with things evolving into Gateway API.