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16th chunk of `nixos/doc/manual/release-notes/rl-2305.section.md`
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- `services.netdata` offers a [`services.netdata.deadlineBeforeStopSec`](#opt-services.netdata.deadlineBeforeStopSec) option which will control the deadline (in seconds) after which systemd will consider your netdata instance as dead if it didn't start in the elapsed time. It is helpful when your netdata instance takes longer to start because of a large amount of state or upgrades.

- `services.dhcpcd` service stopped soliciting or accepting IPv6 Router Advertisements on interfaces that use static IPv6 addresses.
  If your network provides both IPv6 unique local addresses (ULA) and globally unique addresses (GUA) through autoconfiguration with SLAAC, you must add the parameter `networking.dhcpcd.IPv6rs = true;`.

- The module `services.headscale` was refactored to be compliant with [RFC 0042](https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md). To be precise, this means that the following things have changed:

  - Most settings have been migrated below [services.headscale.settings](#opt-services.headscale.settings) which is a freeform attribute-set that will be converted into headscale's YAML config format. This means that the configuration from [headscale's example configuration](https://github.com/juanfont/headscale/blob/main/config-example.yaml) can be directly written as attribute-set in Nix within this option.

- `services.kubo` now unmounts `ipfsMountDir` and `ipnsMountDir` even if it is killed unexpectedly when `autoMount` is enabled.

- `services.grafana` listens only on localhost by default again. This was changed to the upstream default of `0.0.0.0` by accident in the freeform setting conversion.

- Grafana Tempo has been updated to version 2.0. See the [upstream upgrade guide](https://grafana.com/docs/tempo/latest/release-notes/v2-0/#upgrade-considerations) for migration instructions.

- A new `virtualisation.rosetta` module was added to allow running `x86_64` binaries through [Rosetta](https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment) inside virtualised NixOS guests on Apple Silicon. This feature works by default with the [UTM](https://docs.getutm.app/) virtualisation [package](https://search.nixos.org/packages?channel=23.05&show=utm&from=0&size=1&sort=relevance&type=packages&query=utm).

- The new option `users.motdFile` allows configuring a Message Of The Day that can be updated dynamically.

- The `root` package is now built with the `"-Dgnuinstall=ON"` CMake flag, making the output conform the `bin` `lib` `share` layout. In this layout, `tutorials` is under `share/doc/ROOT/`; `cmake`, `font`, `icons`, `js` and `macro` under `share/root`; `Makefile.comp` and `Makefile.config` under `etc/root`.

- There are various new options in the `services.nginx` module:
    - Enabling global redirect in `services.nginx.virtualHosts` now allows one to add exceptions with the `locations` option.
    - The `proxyCachePath` option has been added to `services.nginx`. It allows configuring the [`proxy_cache_path`](https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_cache_path), that configures the storage path and various other settings for the cache.
    - A new option `recommendedBrotliSettings` has been added to `services.nginx`. Learn more about compression in Brotli format [here](https://github.com/google/ngx_brotli/blob/master/README.md).
    - `services.nginx.recommendedProxySettings` now removes the `Connection` header preventing clients from closing backend connections.

- The nginx module also received an update to `services.nginx.recommendedGzipSettings`:
  - Enables gzip compression for only certain proxied requests.
  - Allow checking and loading of precompressed files.
  - Updated gzip mime-types.
  - Increased the minimum length of a response that will be gzipped.

- [Garage](https://garagehq.deuxfleurs.fr/) version is based on [system.stateVersion](options.html#opt-system.stateVersion), existing installations will keep using version 0.7. New installations will use version 0.8. In order to upgrade a Garage cluster, please follow [upstream instructions](https://garagehq.deuxfleurs.fr/documentation/cookbook/upgrading/) and configure [services.garage.package](options.html#opt-services.garage.package).
Title: NixOS 23.05: Configuration Updates for Kubo, Grafana, Rosetta, Nginx, and Garage
Summary
This section details configuration changes for Netdata (deadlineBeforeStopSec), DHCPCD (IPv6 Router Advertisements), and Headscale (RFC 0042 compliance). Kubo now unmounts directories properly. Grafana defaults to localhost. Grafana Tempo updates to 2.0 require migration. A new Rosetta module enables x86_64 binaries on Apple Silicon guests. `users.motdFile` configures dynamic MOTD. The `root` package uses a standard layout. Nginx gains new options: redirect exceptions, proxy cache path, Brotli settings, and proxy setting updates. Gzip settings are also updated. Garage's version is now tied to `system.stateVersion`; upgrade instructions are provided.