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https://github.com/mlcdf/dyndns

Update Gandi LiveDNS based on the current (dynamic) ip.
https://github.com/mlcdf/dyndns

discord dyndns dyndns-updater gandi gandi-livedns self-hosted

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Update Gandi LiveDNS based on the current (dynamic) ip.

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# dyndns

[![test](https://github.com/mlcdf/dyndns/actions/workflows/test.yml/badge.svg)](https://github.com/mlcdf/dyndns/actions/workflows/test.yml)
[![coverage](https://raw.githubusercontent.com/mlcdf/dyndns/coverage/badge.svg)](https://mlcdf.github.io/dyndns/report.html)

Update Gandi LiveDNS based on the current (dynamic) ip.

## Why

Some (most ?) providers ([Orange](https://orange.fr/) for example) don't provide you with a fix IP address: they give you a dynamic IP that changes over time. This makes it hard to self-host software and share them publicly via a domain because you have to constantly
change the IP your domain is pointing to.

This program aims to solve that. It's intended to run on a always-on computer in your home (such as Raspberry Pi).

## Highlights

- Supports both IPv4 and IPv6.
- Ship as single binary with no OS dependencies.
- Reports failures and successful updates on a Discord channel. /!\ This is not optional (by design).

## Install

- From [GitHub releases](https://go.mlcdf.fr/dyndns/releases): download the binary corresponding to your OS and architecture.
- From source (make sure `$GOPATH/bin` is in your `$PATH`):

```sh
go install go.mlcdf.fr/dyndns
```

## Setup

`dyndns` requires the following environment variables to be set:

| name | description |
|-----------------------|-----------------------------------------------------------------------------------------------------------|
| `DISCORD_WEBHOOK_URL` | your [Discord channel webhook](https://support.discord.com/hc/en-us/articles/228383668-Intro-to-Webhooks) |
| `GANDI_TOKEN` | your [Gandi API Key](https://docs.gandi.net/en/domain_names/advanced_users/api.html) |

## Usage

```
Usage:
dyndns --domain [DOMAIN] --record [RECORD]

Options:
--ttl Time to live in seconds. Defaults to 3600
--always-notify Always notify the Discord channel (even when nothing changes)
-V, --version Print version

Examples:
export DISCORD_WEBHOOK_URL='https://discord.com/api/webhooks/xxx'
export GANDI_TOKEN='foobar'
dyndns --domain example.com --record "*.pi"
```

Setup as a `cron` job

```bash
crontab -e
# Run every 10 minutes
*/10 * * * * /path/to/dyndns --domain example.com --record "*.pi"
```

Check out the example [contrib/deploy.sh](./contrib/deploy.sh) script.

## Development

Requirements:
- go version > 1.19+
- docker

Run the app

```sh
go run main.go
```

Run the tests

```sh
go test ./...
```

Force `go test` to run all the tests (by disabling caching)
```sh
./scrits/test.sh
```

## License

[MIT](https://choosealicense.com/licenses/mit/)