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{ inputs, secrets, nodeName, config, ctucxConfig, lib, pkgs, ... }:
let
katja-pubkey = builtins.readFile "${pkgs.ctucx-website}/ssh_pubkey.asc";
in {
imports = [
ctucxConfig.common
];
boot.loader.efi.canTouchEfiVariables = lib.mkDefault true;
boot.loader.systemd-boot.enable = lib.mkDefault true;
boot.initrd.kernelModules = [ "ipv6" ];
networking.hostName = lib.mkDefault nodeName;
networking.domain = lib.mkDefault "ctu.cx";
i18n.defaultLocale = "en_US.UTF-8";
i18n.supportedLocales = [ "de_DE.UTF-8/UTF-8" "en_US.UTF-8/UTF-8" ];
age.secrets.katjaPassword.file = secrets.allNodes.passwords.katja;
age.secrets.acmeTSIGKey.file = secrets."${config.networking.hostName}".acmeTSigKey;
system = {
nixos.revision = lib.mkIf (inputs.nixpkgs.sourceInfo ? rev) inputs.nixpkgs.sourceInfo.rev;
nixos.versionSuffix = ".${lib.substring 0 8 (inputs.nixpkgs.sourceInfo.lastModifiedDate or inputs.nixpkgs.sourceInfo.lastModified or "19700101")}.${inputs.nixpkgs.sourceInfo.shortRev or "dirty"}";
# thanks piegames (https://git.darmstadt.ccc.de/piegames/home-config/-/blob/master/modules/generic.nix#L84)
activationScripts.diff = {
supportsDryActivation = true;
text = ''
${pkgs.nvd}/bin/nvd --color=always --nix-bin-dir=${pkgs.nix}/bin diff "$(readlink /run/current-system)" "$systemConfig"
# Ignore "failures" because these tools have weird exit codes
${pkgs.colordiff}/bin/colordiff --nobanner --fakeexitcode --color=always -ur -I '\/nix\/store' \
-- "$(readlink /run/current-system)/activate" "$systemConfig/activate" | ${pkgs.gnugrep}/bin/grep -v "^Binary files" || true
${pkgs.colordiff}/bin/colordiff --nobanner --fakeexitcode --color=always -ur -I '\/nix\/store' \
-x "os-release" -x "issue" \
-- "$(readlink /run/current-system)/etc" "$systemConfig/etc" | ${pkgs.gnugrep}/bin/grep -v "^Binary files" || true
${pkgs.colordiff}/bin/colordiff --nobanner --fakeexitcode --color=always -ur -I '\/nix\/store' \
-x "environment.d" \
-x "hwdb.d" \
-- "$(readlink /run/current-system)/systemd" "$systemConfig/systemd" | ${pkgs.gnugrep}/bin/grep -v "^Binary files" || true
'';
};
};
nix = {
channel.enable = lib.mkForce false;
settings = {
auto-optimise-store = true;
# Free up to 1GiB whenever there is less than 100MiB left.
min-free = toString (100 * 1024 * 1024);
max-free = toString (1024 * 1024 * 1024);
};
daemonCPUSchedPolicy = lib.mkDefault "idle";
daemonIOSchedClass = lib.mkDefault "idle";
optimise.automatic = lib.mkDefault true;
optimise.dates = [ "12:00" "15:00" "18:00" "21:00" ];
gc.automatic = lib.mkDefault true;
gc.options = "--delete-older-than 3d";
gc.dates = "18:00";
};
systemd.services = let
ctucxCAgetCRL = pkgs.writeShellScript "ctucxCAgetCRL" ''
${lib.getExe pkgs.curl} -s -o /tmp/ctucxCAcrl.der '${(
if config.services.step-ca.enable then
"http://${config.services.step-ca.settings.insecureAddress}/1.0/crl"
else
"https://ca.ctu.cx/1.0/crl"
)}';
cp ${../../secrets/certs/rootCA.crl} /etc/ctucxCA.crl;
${lib.getExe pkgs.openssl} crl -in /tmp/ctucxCAcrl.der -inform der >> /etc/ctucxCA.crl;
'';
in {
nginx.onFailure = [ "email-notify@%i.service" ];
ctucxCAgetCRL = {
wantedBy = [ "multi-user.target" ];
before = [ "nginx.service" ];
after = lib.mkIf config.services.step-ca.enable [ "step-ca.service" ];
serviceConfig.Type = "oneshot";
serviceConfig.ExecStart = ctucxCAgetCRL;
};
ctucxCAupdateCRL = {
wantedBy = [ "multi-user.target" ];
after = lib.mkIf config.services.step-ca.enable [ "step-ca.service" ];
startAt = [ "*-*-* *:0/10:00" ];
serviceConfig.Type = "oneshot";
serviceConfig.ExecStart = ctucxCAgetCRL;
serviceConfig.ExecStartPost = "${pkgs.systemd}/bin/systemctl reload nginx.service";
};
};
services = {
timesyncd.enable = lib.mkDefault true;
fstrim.enable = lib.mkDefault true;
vnstat.enable = lib.mkDefault true;
vnstati.enable = lib.mkDefault config.services.vnstat.enable;
journald.extraConfig = "SystemMaxUse=1G";
logind.killUserProcesses = lib.mkDefault true;
nginx = {
resolver.addresses = lib.mkDefault [ "[2620:fe::fe]" "[2620:fe::9]" "[2606:4700:4700::1111]" "1.1.1.1" "9.9.9.9" ];
recommendedGzipSettings = true;
recommendedOptimisation = true;
recommendedProxySettings = true;
recommendedTlsSettings = true;
commonHttpConfig = ''
server_names_hash_bucket_size 64;
charset utf-8;
access_log off;
'';
virtualHosts."${config.networking.fqdn}".default = true;
};
openssh = {
enable = lib.mkDefault true;
startWhenNeeded = lib.mkDefault true;
ports = [ 22 ];
extraConfig = ''
AllowTcpForwarding yes
AllowAgentForwarding no
AllowStreamLocalForwarding no
AuthenticationMethods publickey
'';
settings = {
AllowUsers = [ "root" "katja" ];
X11Forwarding = false;
PermitRootLogin = "without-password";
PasswordAuthentication = false;
challengeResponseAuthentication = false;
};
};
};
security.acme = {
acceptTerms = true;
defaults = {
email = "letsencrypt@ctu.cx";
keyType = "ec384";
dnsProvider = "rfc2136";
environmentFile = pkgs.writeText "acme-dns-env" ''
RFC2136_NAMESERVER=ns1.ctu.cx
RFC2136_TSIG_KEY=acme-nix-${config.networking.hostName}
RFC2136_TSIG_ALGORITHM=hmac-sha384.
'';
credentialFiles = {
RFC2136_TSIG_SECRET_FILE = config.age.secrets.acmeTSIGKey.path;
};
};
certs."${config.networking.fqdn}" = {
group = "nginx";
extraDomainNames = (
config.services.nginx.virtualHosts
|> lib.mapAttrsToList (key: config: [ (if config ? serverAliases then config.serverAliases else []) key ])
|> lib.flatten
);
};
};
users.mutableUsers = false;
users.users.root.openssh.authorizedKeys.keys = [ katja-pubkey ];
users.users.katja = {
isNormalUser = true;
hashedPasswordFile = config.age.secrets.katjaPassword.path;
extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
openssh.authorizedKeys.keys = [ katja-pubkey ];
};
home-manager.users.katja = {
home.language = {
"base" = "en_US.UTF-8";
"time" = "de_DE.utf8";
"address" = "de_DE.utf8";
"monetary" = "de_DE.utf8";
"paper" = "de_DE.utf8";
};
};
}