86f042a55b
GitOrigin-RevId: c7d0dbe094c988209edac801eb2a0cc21aa498d8
173 lines
5.2 KiB
Nix
173 lines
5.2 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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gce = pkgs.google-compute-engine;
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in
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{
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imports = [
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../profiles/headless.nix
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../profiles/qemu-guest.nix
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];
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fileSystems."/" = {
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fsType = "ext4";
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device = "/dev/disk/by-label/nixos";
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autoResize = true;
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};
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boot.growPartition = true;
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boot.kernelParams = [ "console=ttyS0" "panic=1" "boot.panic_on_fail" ];
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boot.initrd.kernelModules = [ "virtio_scsi" ];
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boot.kernelModules = [ "virtio_pci" "virtio_net" ];
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# Generate a GRUB menu.
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boot.loader.grub.device = "/dev/sda";
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boot.loader.timeout = 0;
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# Don't put old configurations in the GRUB menu. The user has no
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# way to select them anyway.
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boot.loader.grub.configurationLimit = 0;
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# Allow root logins only using SSH keys
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# and disable password authentication in general
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services.openssh.enable = true;
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services.openssh.permitRootLogin = "prohibit-password";
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services.openssh.passwordAuthentication = mkDefault false;
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# enable OS Login. This also requires setting enable-oslogin=TRUE metadata on
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# instance or project level
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security.googleOsLogin.enable = true;
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# Use GCE udev rules for dynamic disk volumes
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services.udev.packages = [ gce ];
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# Force getting the hostname from Google Compute.
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networking.hostName = mkDefault "";
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# Always include cryptsetup so that NixOps can use it.
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environment.systemPackages = [ pkgs.cryptsetup ];
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# Make sure GCE image does not replace host key that NixOps sets
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environment.etc."default/instance_configs.cfg".text = lib.mkDefault ''
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[InstanceSetup]
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set_host_keys = false
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'';
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# Rely on GCP's firewall instead
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networking.firewall.enable = mkDefault false;
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# Configure default metadata hostnames
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networking.extraHosts = ''
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169.254.169.254 metadata.google.internal metadata
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'';
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networking.timeServers = [ "metadata.google.internal" ];
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networking.usePredictableInterfaceNames = false;
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# GC has 1460 MTU
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networking.interfaces.eth0.mtu = 1460;
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# Used by NixOps
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systemd.services.fetch-instance-ssh-keys = {
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description = "Fetch host keys and authorized_keys for root user";
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wantedBy = [ "sshd.service" ];
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before = [ "sshd.service" ];
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after = [ "network-online.target" ];
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wants = [ "network-online.target" ];
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path = [ pkgs.wget ];
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serviceConfig = {
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Type = "oneshot";
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ExecStart = pkgs.runCommand "fetch-instance-ssh-keys" { } ''
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cp ${./fetch-instance-ssh-keys.bash} $out
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chmod +x $out
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${pkgs.shfmt}/bin/shfmt -i 4 -d $out
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${pkgs.shellcheck}/bin/shellcheck $out
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patchShebangs $out
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'';
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PrivateTmp = true;
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StandardError = "journal+console";
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StandardOutput = "journal+console";
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};
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};
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systemd.services.google-instance-setup = {
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description = "Google Compute Engine Instance Setup";
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after = [ "network-online.target" "network.target" "rsyslog.service" ];
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before = [ "sshd.service" ];
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path = with pkgs; [ coreutils ethtool openssh ];
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serviceConfig = {
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ExecStart = "${gce}/bin/google_instance_setup";
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StandardOutput="journal+console";
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Type = "oneshot";
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};
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wantedBy = [ "sshd.service" "multi-user.target" ];
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};
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systemd.services.google-network-daemon = {
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description = "Google Compute Engine Network Daemon";
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after = [ "network-online.target" "network.target" "google-instance-setup.service" ];
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path = with pkgs; [ iproute ];
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serviceConfig = {
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ExecStart = "${gce}/bin/google_network_daemon";
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StandardOutput="journal+console";
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Type="simple";
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};
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wantedBy = [ "multi-user.target" ];
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};
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systemd.services.google-clock-skew-daemon = {
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description = "Google Compute Engine Clock Skew Daemon";
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after = [ "network.target" "google-instance-setup.service" "google-network-daemon.service" ];
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serviceConfig = {
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ExecStart = "${gce}/bin/google_clock_skew_daemon";
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StandardOutput="journal+console";
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Type = "simple";
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};
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wantedBy = ["multi-user.target"];
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};
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systemd.services.google-shutdown-scripts = {
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description = "Google Compute Engine Shutdown Scripts";
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after = [
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"network-online.target"
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"network.target"
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"rsyslog.service"
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"google-instance-setup.service"
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"google-network-daemon.service"
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];
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serviceConfig = {
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ExecStart = "${pkgs.coreutils}/bin/true";
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ExecStop = "${gce}/bin/google_metadata_script_runner --script-type shutdown";
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RemainAfterExit = true;
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StandardOutput="journal+console";
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TimeoutStopSec = "0";
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Type = "oneshot";
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};
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wantedBy = [ "multi-user.target" ];
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};
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systemd.services.google-startup-scripts = {
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description = "Google Compute Engine Startup Scripts";
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after = [
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"network-online.target"
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"network.target"
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"rsyslog.service"
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"google-instance-setup.service"
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"google-network-daemon.service"
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];
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serviceConfig = {
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ExecStart = "${gce}/bin/google_metadata_script_runner --script-type startup";
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KillMode = "process";
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StandardOutput = "journal+console";
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Type = "oneshot";
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};
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wantedBy = [ "multi-user.target" ];
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};
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environment.etc."sysctl.d/11-gce-network-security.conf".source = "${gce}/sysctl.d/11-gce-network-security.conf";
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}
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