meta/architecture-docs/NixDefinitions.md

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2024-06-20 15:38:44 +02:00
# NixDefinitions
## Where it's situated
![](./architecture.png)
### [NixConfigs](./NixConfigs.md)
NixDefinitions is a layer of NixOS modules that exposes a simple interface of a few options (e.g. what services to run, domain names). Setting those options is the job of the layer above (NixConfigs).
### [NixOS Instances](./NixOS_Instances.md) & [Services](./Services.md)
The combination of NixConfigs and NixDefintions produces a detailed description of the Services and other system setup that should be running on the NixOS instances.
### [NixOps](./NixOps.md)
NixOps consumes the combined NixConfigs/NixDefintions configuration to know what the system should look like when deployed.
### [NixGuard](./NixGuard.md)
NixGuard compares the state of the NixConfigs/NixDefinitions to the running state to detect inconsistent state and either fix or report it.
## Purpose
NixDefinitions...
- simplifies the job of NixPanel, allowing it to not worry at all about *how* machines work, but simply produce a machine-readable translation of the options set by Administrators.
- factors out the system configuration that is common between any Fediversity system, defining a simple set of parameters that might differ between them.