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Aaron Honeycutt 2025-05-17 17:52:27 -06:00
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title = "Welcome to Hydra"
date = 2025-05-17
date = 2025-05-18
draft = false
[taxonomies]
categories = [ "nixos" ]
tags = [ "nixos", "nixos-25.05" ]
tags = [ "nixos", "nixos-server", "nixos-25.05", "hydra"]
+++
## CB (Continuous Build system)
# CB (Continuous Build system)
This is what [NixOS](https://hydra.nixos.org/) itself uses for building packages for it's [channels](https://nixos.wiki/wiki/Nix_channels). Setting it up yourself on NixOS is pretty easy with this nix config:
```nix
```nix,linenos
{ config, pkgs, lib, ... }:
{
@ -28,11 +28,11 @@ This is what [NixOS](https://hydra.nixos.org/) itself uses for building packages
once you add that to your `configuration.nix` (or another nix file that you import) and rebuild you'll find it running on port 3000 (localhost:3000). For creating a project and other admin roles I would recommand looking at [this page](https://nixos.wiki/wiki/Hydra).
### Your own nixpkgs
## Your own nixpkgs
I started my own [nixpkgs repository](https://gitlab.com/ahoneybun-nix/nixpkgs) recently and this is my flake:
```nix
```nix,linenos
{
description = "Aaron Honeycutt's packages";
@ -70,7 +70,7 @@ With this you can run `nix build .#honeyfetch` (one of the packages in that repo
{{ figure(src="/images/nixos-hydra-ci/built-x86-64-linux.png", alt="Hydra building for x86_64-linux", caption="Hydra building for x86_64-linux") }}
## Building for other architectures
# Building for other architectures
NixOS is great at supporting 4 main architectures (known as Platforms):
@ -83,7 +83,7 @@ there is a 5th one which is i686-linux though it is not as common.
Hydra can build for all of them and this example we'll add aarch64-linux (for devices such as the Raspberry Pi in my case), this is how our Hydra configuration looks with that enabled:
```nix
```nix,linenos
{ config, pkgs, lib, ... }:
{
@ -112,3 +112,6 @@ If you just want to build for x86_64-linux or a certain Platform only you can us
{{ figure(src="/images/nixos-hydra-ci/built-systems.png", alt="Hydra building for x86_64-linux and aarch64-linux", caption="Hydra building for x86_64-linux and aarch64-linux") }}
# Other questions
For more reading I have my nix files hosted on GitLab [here](https://gitlab.com/ahoneybun-nix/nix-configs/-/tree/main/homelab). Reach out to my on Mastodon for questions!