# Simple Metrics Generator

Simple Prometheus metrics generator.

## Usage

```bash
cat metadata | generate_metrics tempurature 50
```

with your metadata file looking something like

```
unit="F", computer="computer5"
```

---

From here you could then redirect stdout into a file, then host the file with something like Caddy for Prometheus to scrape.

## Examples

A simple "down detector". Put this in a crontab (runs every minute):
```bash
* * * * * cat /etc/metrics_metadata | generate_metrics cloudflare $(ping -c 1 1.1.1.1 &> /dev/null ; echo $?) > /srv/metrics/cloudflare
```

---

Actual down detector I'm using:

```bash
#!/bin/bash

# Clear the file
echo "" > /srv/metrics

targets=("1.1.1.1" "192.168.1.1" "oliveratkinson.net")

for i in "${targets[@]}"
do
        export TARGET=$i
        envsubst < /root/metrics_metadata | /root/generate_metrics is_down $(ping -c 1 $TARGET &> /dev/null; echo $?) >> /srv/metrics
done
```
```caddyfile
:80 {
        handle /metrics {
                root * /srv
                file_server
        }
}
```