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|
{
config,
lib,
inputs',
...
}:
let
cfg = config.profiles.server;
# 2^30
# Why doesn't nix have a `pow`???
gb = 1024 * 1024 * 1024;
minimumStorageKb = 15 * gb;
in
{
options.profiles.server = {
enable = lib.mkEnableOption "the Server profile";
hostUser = lib.mkEnableOption "a default interactive user" // {
default = true;
};
};
config = lib.mkIf cfg.enable (
lib.mkMerge [
{
# All servers are most likely on stable, so we want to pull in some newer packages from time to time
_module.args.unstable = inputs'.nixpkgs.legacyPackages;
boot.tmp.cleanOnBoot = lib.mkDefault true;
# We don't need it here
documentation.enable = false;
environment.defaultPackages = lib.mkForce [ ];
mixins = {
cloudflared.enable = true;
};
nix.gc = {
dates = "*:0/30"; # Every 30 minutes
# GC to stay above minimumStorageBytes
options = toString [
"--delete-older-than 5d"
"--max-freed \"$((${toString minimumStorageKb} - 1024 * $(df -k --output=avail /nix/store | tail -n 1)))\""
];
};
traits = {
autoUpgrade.enable = true;
secrets.enable = true;
tailscale = {
enable = true;
ssh.enable = true;
};
zram.enable = true;
};
}
(lib.mkIf cfg.hostUser {
# Hardening access to `nix` as no other users *should* ever really touch it
nix.settings.allowed-users = [ config.networking.hostName ];
users.users.${config.networking.hostName} = {
isNormalUser = true;
extraGroups = [ "wheel" ];
};
})
]
);
}
|
