# ntppool.org Exporter

This exporter is @adoralaura s try to display server scores from servers in [ntppool.org](https://www.ntppool.org) in a format which [Prometheus](https://prometheus.io/) can ingest.

# Usage

## Installation

Pre-built docker images can be found at [Docker Hub](https://hub.docker.com/r/lauralani/ntppool-exporter). A sample `docker-compose.yml` can be [found here](docker-compose.yml).

Binaries can be built by cloning this repository and run `go build main.go` with [Golang](https://go.dev/) installed.

## Running

Start `ntppool-exporter` as a daemon or from CLI:

```sh
./ntppool-exporter
```

Visit <http://localhost:43609/metrics?target=192.0.0.8> where `192.0.0.8` is the IP
of the NTP server you want to get the score from.

## Prometheus Configuration

The URL parameter `target` can be controlled through relabelling.

Example config:
```YAML
scrape_configs:
  - job_name: 'ntppool'
    static_configs:
      - targets:
        - 192.168.1.2
        - 2003:db8::1
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 127.0.0.1:43609  # The ntppool exporter's real hostname:port.
```

Similarly to [blackbox_exporter](https://github.com/prometheus/blackbox_exporter),
`ntppool-exporter` is meant to run on a few central machines and can be thought of
like a "Prometheus proxy".

### TLS and basic authentication

The ntppool Exporter does **not** support TLS and basic authentication yet. 
This may be added in a future release.

## Scaling

A single instance of `ntppool-exporter` should be able to query for a lot of servers. However, rate limits for upstream `ntppool.org` API endpoints may interfere.
Furthermore, as this project is in its early stage, issues may currently prevent it from scaling.

# Once you have it running

It can be opaque to get started with all this. To make it
easier for others, please consider contributing back your configurations to
us.

# Contributing
If you have any ideas, enhancements, bug reports or general questions, please don't hesitate to [create a new issue](https://gitlab.com/adoralaura/ntppool-exporter/-/issues/new).

If you want to contribute to this project, please read the [Contribution Guidelines](CONTRIBUTING.md)