# OPNsense Prometheus Exporter

The OPNsense exporter enables you to monitor your OPNsense firewall from the API.

`Still under heavy development. The full metrics list is not yet implemented.`

# Table of Contents

1. **[OPNsense User Permissions](#opnsense-user-permissions)**  
2. **[Usage](#usage)**  
3. **[Configuration](#configuration)**  
      - **[SSL/TLS](#ssltls)**  
5. **[Grafana Dashboard](#grafana-dashboard)**  


## OPNsense user permissions

**TODO**

## Usage

**TODO**

## Configuration

To configure where your OPNsense API is located, you can use the following flags:

- `--opnsense.protocol` - The protocol to use to connect to the OPNsense API. Can be either `http` or `https`.
- `--opnsense.address` - The hostname or IP address of the OPNsense API.
- `--opnsense.api-key` - The API key to use to connect to the OPNsense API.
- `--opnsense.api-secret` - The API secret to use to connect to the OPNsense API

### SSL/TLS

- `--opnsense.insecure` - Disable TLS certificate verification. Not recommendet. Defaults to `false`.
- If you have your api served with self-signed certificates. You should add them to the system trust store.  
TODO: add Docker example

```bash
You can disable parts of the exporter using the following flags:

- `--exporter.disable-arp-table` - Disable the scraping of the ARP table. Defaults to `false`.
- `--exporter.disable-cron-table` - Disable the scraping of the cron table. Defaults to `false`.

Full list

```bash
Flags:
  -h, --[no-]help                Show context-sensitive help (also try --help-long and --help-man).
      --log.level="info"         Log level. One of: [debug, info, warn, error]
      --log.format="logfmt"      Log format. One of: [logfmt, json]
      --web.telemetry-path="/metrics"  
                                 Path under which to expose metrics.
      --[no-]web.disable-exporter-metrics  
                                 Exclude metrics about the exporter itself (promhttp_*, process_*, go_*). ($OPNSENSE_EXPORTER_DISABLE_EXPORTER_METRICS)
      --runtime.gomaxprocs=2     The target number of CPUs that the Go runtime will run on (GOMAXPROCS) ($GOMAXPROCS)
      --exporter.instance-label=EXPORTER.INSTANCE-LABEL  
                                 Label to use to identify the instance in every metric. If you have multiple instances of the exporter, you can differentiate them by using different value in this flag, that represents the instance of the target OPNsense.
                                 ($OPNSENSE_EXPORTER_INSTANCE_LABEL)
      --[no-]exporter.disable-arp-table  
                                 Disable the scraping of the ARP table ($OPNSENSE_EXPORTER_DISABLE_ARP_TABLE)
      --[no-]exporter.disable-cron-table  
                                 Disable the scraping of the cron table ($OPNSENSE_EXPORTER_DISABLE_CRON_TABLE)
      --opnsense.protocol=OPNSENSE.PROTOCOL  
                                 Protocol to use to connect to OPNsense API. One of: [http, https] ($OPNSENSE_EXPORTER_OPS_PROTOCOL)
      --opnsense.address=OPNSENSE.ADDRESS  
                                 Hostname or IP address of OPNsense API ($OPNSENSE_EXPORTER_OPS_API)
      --opnsense.api-key=OPNSENSE.API-KEY  
                                 API key to use to connect to OPNsense API ($OPNSENSE_EXPORTER_OPS_API_KEY)
      --opnsense.api-secret=OPNSENSE.API-SECRET  
                                 API secret to use to connect to OPNsense API ($OPNSENSE_EXPORTER_OPS_API_SECRET)
      --[no-]opnsense.insecure   Disable TLS certificate verification ($OPNSENSE_EXPORTER_OPS_INSECURE)
      --[no-]web.systemd-socket  Use systemd socket activation listeners instead of port listeners (Linux only).
      --web.listen-address=:8080 ...  
                                 Addresses on which to expose metrics and web interface. Repeatable for multiple addresses.
      --web.config.file=""       [EXPERIMENTAL] Path to configuration file that can enable TLS or authentication. See: https://github.com/prometheus/exporter-toolkit/blob/master/docs/web-configuration.md
```

## Grafana Dashboard

**TODO**