labels from prometheus-plugin-prometheus-sd configcontext

[rvmack]

Hi there,

I'd like to override scrape_interval and scrape_timeout as needed via config context without modifications on prometheus server config.
In the end I want to set __scrape_timeout__ and __scrape_interval__ labels. Guess there'd be lot more use cases.

As far as I can see, that'd just require some additional code here:
https://github.com/FlxPeters/netbox-plugin-prometheus-sd/blob/main/netbox_prometheus_sd/api/utils.py#L162

@FlxPeters would you agree a MR in that regard? Like exposing all labels below "labels" key in a prometheus-plugin-prometheus-sd config context:

"prometheus-plugin-prometheus-sd": [
        {
            "metrics_path": "/smth",
            "port": 1234,
            "scheme": "https",
            "labels": {
               "k": "v"
            }
        }
    ]

if key "k":

• does not start with __meta_netbox_
• is not eqal to __scheme__ or __metrics_path__

These conditions shall prevent conflicts with existing stuff.

Thanks for sharing this plugin!

[dj-bauer]

I created a custom field for that, since custom fields are supposed to getting exported.
I can see the label being created, altough I'm currently struggling with the value of the field not being set