112 lines
3.4 KiB
Nix
112 lines
3.4 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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inherit (lib)
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boolToString
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mkDefault
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mkIf
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optional
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readFile
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;
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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.settings.PermitRootLogin = "prohibit-password";
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services.openssh.settings.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 = [ pkgs.google-guest-configs ];
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services.udev.path = [ pkgs.google-guest-configs ];
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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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# 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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systemd.packages = [ pkgs.google-guest-agent ];
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systemd.services.google-guest-agent = {
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wantedBy = [ "multi-user.target" ];
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restartTriggers = [ config.environment.etc."default/instance_configs.cfg".source ];
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path = optional config.users.mutableUsers pkgs.shadow;
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};
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systemd.services.google-startup-scripts.wantedBy = [ "multi-user.target" ];
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systemd.services.google-shutdown-scripts.wantedBy = [ "multi-user.target" ];
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security.sudo.extraRules = mkIf config.users.mutableUsers [
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{ groups = [ "google-sudoers" ]; commands = [ { command = "ALL"; options = [ "NOPASSWD" ]; } ]; }
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];
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users.groups.google-sudoers = mkIf config.users.mutableUsers { };
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boot.extraModprobeConfig = readFile "${pkgs.google-guest-configs}/etc/modprobe.d/gce-blacklist.conf";
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environment.etc."sysctl.d/60-gce-network-security.conf".source = "${pkgs.google-guest-configs}/etc/sysctl.d/60-gce-network-security.conf";
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environment.etc."default/instance_configs.cfg".text = ''
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[Accounts]
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useradd_cmd = useradd -m -s /run/current-system/sw/bin/bash -p * {user}
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[Daemons]
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accounts_daemon = ${boolToString config.users.mutableUsers}
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[InstanceSetup]
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# Make sure GCE image does not replace host key that NixOps sets.
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set_host_keys = false
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[MetadataScripts]
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default_shell = ${pkgs.stdenv.shell}
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[NetworkInterfaces]
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dhclient_script = ${pkgs.google-guest-configs}/bin/google-dhclient-script
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# We set up network interfaces declaratively.
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setup = false
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'';
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}
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