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feat: bidirectional remote builders — server <> uConsole

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Add reusable remote-builder NixOS module and builder system user.

Server (lazyworkhorse): dispatches aarch64-linux builds to uConsole
uConsole: dispatches x86_64-linux builds to server

The builder user uses the same SSH keypair on both hosts for
symmetric remote building. Generate the key with:
  ssh-keygen -t ed25519 -f /etc/ssh/builder_key -N ""
Add the public key to lib/keys.nix (replace PLACEHOLDER).
This commit is contained in:
Hermes
2026-06-20 20:59:38 -04:00
parent 5aca97e057
commit 84c6a7af6a
6 changed files with 135 additions and 0 deletions
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18
hosts/lazyworkhorse/configuration.nix
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@@ -573,5 +573,23 @@
# For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
system.stateVersion = "25.05"; # Did you read the comment?
# ============================================================
# Remote builder — dispatches aarch64-linux builds to uConsole
# ============================================================
services.remoteBuilder = {
enable = true;
machines = [
{
hostName = "192.168.1.120";
port = 22;
sshUser = "builder";
sshKey = "/etc/ssh/builder_key";
systems = [ "aarch64-linux" ];
maxJobs = 4;
}
];
};
}