GeoIP2 docs mention incorrect folder for mounted volumes

[dVerhees]

What happened:

I tried to mount the geopip2 databases using a volume mount, using the paths in the official docs. After searching the github issues and the code I noticed the path used has changed:
from /etc/nginx/geoip/ to /etc/ingress-controller/geoip/

specifically in this pr: #10470

This is not reflected in the docs:
https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/configmap/#use-geoip2

This line:

ingress-nginx/docs/user-guide/nginx-configuration/configmap.md

Line 734 in 3c4e78e

Alternatively, it is possible to use a volume to mount the files `/etc/nginx/geoip/GeoLite2-City.mmdb` and `/etc/nginx/geoip/GeoLite2-ASN.mmdb`, avoiding the overhead of the download.

What you expected to happen:

GeoIP2 files to be mounted, and controller to start with GeoIP2 enabled.

NGINX Ingress controller version (exec into the pod and run nginx-ingress-controller --version.):

---

NGINX Ingress controller
Release: v1.10.0
Build: 71f78d4
Repository: https://github.com/kubernetes/ingress-nginx
nginx version: nginx/1.25.3

---

Kubernetes version (use kubectl version):
Client Version: v1.29.2
Server Version: v1.28.5

Environment:

• Cloud provider or hardware configuration: AKS

• OS (e.g. from /etc/os-release): Ubuntu 22.04

• Kernel (e.g. uname -a): 5.15.0-1057-azure

• Install tools:

  • azure cli

• Basic cluster related info: Not Relevant, documentation issue

• How was the ingress-nginx-controller installed: Helm

• Current State of the controller: running

• Current state of ingress object, if applicable: N/A

• Others: N/A

How to reproduce this issue:

• Create a volume containing the GeoIP2 databases required.
• set the volume mounts for the volume with the databases and set the path to /etc/nginx/geoip/ as listed in the docs
• do not set the maxmind key
• Enable GeoIP2 in the helm chart and deploy it
• GeoIP2 will not be loaded, because it's missing the files.

Anything else we need to know: No, setting the correct path works, so it's just a documentation issue

/kind documentation
/remove-kind bug

[longwuyuan]

/triage accepted
/area docs
/priority important-longterm

Seems what you are saying is true. Can you submit a docs PR

cc @rikatz , please confirm, when you get a chance