metrics can not be read without authentication when using BASE_PATH

[sthiriet]

NetBox version

v2.10.4

Python version

3.8

Steps to Reproduce

1. Set METRICS_ENABLED=True
2. Set LOGIN_REQUIRED=True (added by @jeremystretch)
3. Set BASE_PATH='netbox/'
4. HTTP GET on /netbox/metrics url redirect to login page

Expected Behavior

succesfully get metrics

Observed Behavior

Redirection to login url.

[sthiriet]

From what i see, it should be resolved by modifying this line :

netbox/netbox/netbox/middleware.py

Line 27 in 09b856b

if not request.path_info.startswith((api_path, '/metrics')) and request.path_info != settings.LOGIN_URL:

with something like

if not request.path_info.startswith((api_path, '/{}metrics'.format(settings.BASE_PATH))) and request.path_info != settings.LOGIN_URL: