# OVH DNS Update

<!-- action-docs-description -->
## Description

Update a given DNS record using the OVH API.

**NOTE:** This action is written in Go. Please setup the Go environment before running this action or use a runner with Go environment installed.

<!-- action-docs-description -->
<!-- action-docs-inputs -->
## Inputs

| parameter | description | required | default |
| --- | --- | --- | --- |
| subdomain | The subdomain to update (e.g. _release) | `true` |  |
| domain | The domain (zoneName in the OVH API) | `true` |  |
| record-id | The ID of the record to update | `true` |  |
| value | The TXT value to set | `true` |  |
| ovh-endpoint | The OVH API endpoint | `false` | `ovh-eu` |
| ovh-app-key | The OVH API Application Key | `true` |  |
| ovh-app-secret | The OVH API Application Secret | `true` |  |
| ovh-consumer-key | The OVH API Consumer Key | `true` |  |
<!-- action-docs-inputs -->

## Create the OVH credentials and information

* https://api.ovh.com/console/#/domain/zone/%7BzoneName%7D/record~GET
* Authenticate
* Set zoneName (e.g `forgejo.org`)
* Set fieldType to `TXT`
* Set subDomain (e.g. `release`)
* Click `EXECUTE`
* The content of `RESPONSE` is the `record-id` (e.g. `5283602601`)
* Visit https://www.ovh.com/auth/api/createToken?PUT=/domain/zone/{domain}/record/{record-id} (e.g. https://www.ovh.com/auth/api/createToken?PUT=/domain/zone/forgejo.org/record/5283602601)
* Click create
* `Application key` is `ovh-app-key`
* `Application secret` is `ovh-app-secret`
* `Consumer Key` is `ovh-consumer-key`

## Security notice

**However be aware that the credentials can also update the subdmain!** This means that anyone with this credentials can publish a TXT record under any `subdomain` of the `domain` (for instance to get a signed certificate by completing the [DNS challenge of the ACME protocol](https://letsencrypt.org/docs/challenge-types/#dns-01-challenge)).

To mitigate this issue, a dedicated `domain` can be used with only TXT records (and CNAME records on the main `domain`, which points to those TXT records).

## Example

```
on: [tag]
jobs:
  upload-release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: https://code.forgejo.org/actions/setup-go@v4
        with:
          go-version: ">=1.21"
          check-latest: true
      - uses: https://code.forgejo.org/forgejo/ovh-dns-update@v1.0.1
        with:
          subdomain: _release
          domain: example.org
          record-id: 12345
          value: v=${{ github.ref_name }}
          ovh-app-key: ${{ secrets.OVH_APP_KEY }}
          ovh-app-secret: ${{ secrets.OVH_APP_SECRET }}
          ovh-consumer-key: ${{ secrets.OVH_CON_KEY }}
```

## Legacy

It was originally developed for use in the [Release Version Check Over DNS (RVCoDNS)](https://codeberg.org/forgejo-contrib/rvcodns).