Apache Exporter

The Apache Exporter scrapes Apache server status and exports the metrics as
Prometheus metrics.

Key features:
- Exports Apache mod_status metrics as Prometheus metrics
- Configurable scrape URI for the Apache server
- Supports HTTP and HTTPS Apache endpoints

Default ports:
- Metrics endpoint: 9117

Configuration:
- snap set apache-exporter web.listen-port=PORT
- snap set apache-exporter scrape.uri=http://localhost/server-status?auto
- snap set apache-exporter host.override=example.com