Login results in nginx 502 error

[mcasperson]

When performing a login, nginx returns a 502 error. In the logs you will see this:

2018/11/06 19:50:54 [error] 541#541: *80284 upstream sent too big header while reading response header from upstream

The solution is to add the following setting to the nginx config file:

proxy-buffer-size 128k;

This setting is documented at https://github.com/kubernetes/ingress-nginx/blob/master/docs/user-guide/nginx-configuration/configmap.md#proxy-buffer-size

[eiximenis]

Yep :)

Just for sake of completness...

• If using AKS, then you can simply do a kubectl apply -f aks-httpaddon-cfg.yaml (file is in /k8s/helm). That will reapply the configmap used by nginx controller preinstalled with the http routing addon in AKS.
• If using local k8s of Docker CE then this setting should be applied if you followed the instructions of wiki page. If not, the configmap is in the /k8s/nginx-ingress so you can apply. In fact this is a generic configmap that should work with any nginx controller that is installed on ingress-nginx namespace

I'll review the doc to make sure that these steps are clear :)

Thanks!

[mvelosop]

It looks like the conversation ended, so I'm closing this issue now. Feel free to comment, will reopen if needed.