dnscontrol/documentation/provider/hetzner_v2.md
Jakob Ackermann 1e67585e8f
HETZNER_V2: Add provider for Hetzner DNS API (#3837)
Closes https://github.com/StackExchange/dnscontrol/issues/3787

This PR is adding a `HETZNER_V2` provider for the "new" Hetzner DNS API.

Testing:
- The integration tests are passing.
- Manual testing:
  - `preview` (see diff for existing zone)
- `preview --populate-on-preview` (see full diff for newly created zone)
  - `push` (see full diff; no diff after push)
- `push` (see full diff; no diff after push to newly created zone --
i.e. single pass and done)

```js
var REG_NONE = NewRegistrar('none')
var DSP = NewDnsProvider('HETZNER_V2')

D('testing-2025-11-14-7.dev', REG_NONE, DnsProvider(DSP),
    A('@', '127.0.0.1')
)
```

<details>

```
# push for newly created zone
CONCURRENTLY checking for 1 zone(s)
SERIALLY checking for 0 zone(s)
Waiting for concurrent checking(s) to complete...DONE
******************** Domain: testing-2025-11-14-7.dev
1 correction (HETZNER_V2)
#1: Ensuring zone "testing-2025-11-14-7.dev" exists in "HETZNER_V2"
SUCCESS!
CONCURRENTLY gathering records of 1 zone(s)
SERIALLY gathering records of 0 zone(s)
Waiting for concurrent gathering(s) to complete...DONE
******************** Domain: testing-2025-11-14-7.dev
4 corrections (HETZNER_V2)
#1: ± MODIFY-TTL testing-2025-11-14-7.dev NS helium.ns.hetzner.de. ttl=(3600->300)
± MODIFY-TTL testing-2025-11-14-7.dev NS hydrogen.ns.hetzner.com. ttl=(3600->300)
± MODIFY-TTL testing-2025-11-14-7.dev NS oxygen.ns.hetzner.com. ttl=(3600->300)
SUCCESS!
#2: + CREATE testing-2025-11-14-7.dev A 127.0.0.1 ttl=300
SUCCESS!
Done. 5 corrections.
```
</details>

Feedback for @jooola and @LKaemmerling:
- The SDK was very useful in getting 80% there! Nice! 🎉 
- Footgun:
- The `result` values are not "up-to-date" after waiting for an
`Action`, e.g. `Zone.AuthoritativeNameservers.Assigned` is not set when
`Client.Zone.Create()` returns and the following "wait" will not update
it.
- Taking a step back here: Waiting for an `Action` with a separate SDK
call does not seem very natural to me. Does the SDK-user need to know
that you are processing operations asynchronous? (Which seems like an
implementation detail to me, something that the SDK could abstrct over.)
Can `Client.Zone.Create()` return the final `Zone` instead of the
intermediate result?
- Features missing compared to the DNS Console, in priority order:
- It is no longer possible to remove your provided name servers from the
root/apex. Use-case: dual-home/multi-home zone with fewer than three
servers from Hetzner. I'm operating one of these and cannot migrate over
until this is fixed.
- Performance regression due to lack of bulk create/modify. E.g. [one of
the test
suites](a71b89e5a2/integrationTest/integration_test.go (L619))
spends about 4.5 minutes on making creating 100 record-sets and then
another 4 minutes for deleting them in sequence again. With your async
API, these are `create 2*100 + delete 2*100 = 400` API calls.
Previously, these were `create 1 + delete 100 = 101` API calls. Are you
planning on adding batch processing again?
- Usability nits
- Compared to other record-set based APIs, upserts for record-sets are
missing. This applies to records of a record-set and the ttl of the
record-set (see separate SDK calls for the cases `diff2.CREATE` vs
`diff2.CHANGE` and two calls in `diff2.CHANGE` for updating the TTL vs
records).
- Some SDK methods return an `Action` (e.g. `Zone.ChangeRRSetTTL()`),
others wrap the `Action` in a struct (`Client.Zone.CreateRRSet()`) --
even when the struct has a single field (`ZoneRRSetDeleteResult`).

---------

Co-authored-by: "Jonas L." <jooola@users.noreply.github.com>
Co-authored-by: "Lukas Kämmerling" <LKaemmerling@users.noreply.github.com>
Co-authored-by: Tom Limoncelli <6293917+tlimoncelli@users.noreply.github.com>
2025-11-30 09:14:54 -05:00

1.2 KiB

Configuration

To use this provider, add an entry to creds.json with TYPE set to HETZNER_V2 along with a Hetzner API Token.

Example:

{% code title="creds.json" %}

{
  "hetzner_v2": {
    "TYPE": "HETZNER_V2",
    "api_token": "your-api-token"
  }
}

{% endcode %}

Metadata

This provider does not recognize any special metadata fields unique to Hetzner DNS API.

Usage

An example configuration:

{% code title="dnsconfig.js" %}

var REG_NONE = NewRegistrar("none");
var DSP_HETZNER = NewDnsProvider("hetzner_v2");

D("example.com", REG_NONE, DnsProvider(DSP_HETZNER),
    A("test", "1.2.3.4"),
);

{% endcode %}

Activation

Create a new API Key in the Hetzner Console.

Caveats

NS

Removing the Hetzner provided NS records at the root is not possible.

SOA

Hetzner DNS API does not allow changing the SOA record via their API. There is an alternative method using an import of a full BIND file, but this approach does not play nice with incremental changes or ignored records. At this time you cannot update SOA records via DNSControl.