This module enables prometheus metrics for Caddy.
In your Caddyfile:
prometheus
For each virtual host that you want to see metrics for.
It optionally takes an address where the metrics are exported, the default
is localhost:9180. The metrics path is fixed to /metrics.
With caddyext you'll need to put this module early in the chain, so that
the duration histogram actually makes sense. I've put it at number 0.
The following metrics are exported:
- caddy_http_request_count_total
- caddy_http_request_duration_seconds
- caddy_http_response_size_bytes
- caddy_http_response_status_count_total
Each counter has a label host which is the hostname used for the request/response.
The status_count metrics has an extra label status which holds the status code.