haccfiles/modules/nopersist.nix

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{ config, lib, pkgs, modules, ... }:
with lib;
{
imports = [ modules.bindMounts ];
users.mutableUsers = false;
boot.initrd = mkIf (config.fileSystems."/".fsType == "zfs") {
network.ssh.hostKeys = mkIf config.hacc.encboot.enable
(mkForce [ /persist/ssh/encboot_host ]);
postDeviceCommands = mkIf (!config.boot.initrd.systemd.enable)
(mkAfter ''
zfs rollback -r ${config.fileSystems."/".device}@blank
'');
systemd = mkIf config.boot.initrd.systemd.enable {
storePaths = [ pkgs.zfs ];
services.rollback = {
description = "Rollback ZFS datasets to a pristine state";
wantedBy = [ "initrd.target" ];
after = [ "zfs-import-${head (splitString "/" config.fileSystems."/".device)}.service" ];
before = [ "sysroot.mount" ];
path = [ pkgs.zfs ];
unitConfig.DefaultDependencies = "no";
serviceConfig.Type = "oneshot";
script = ''
zfs rollback -r ${config.fileSystems."/".device}@blank && echo "rollback complete"
'';
};
};
};
services.openssh = {
hostKeys = [
{
path = "/persist/ssh/ssh_host_ed25519_key";
type = "ed25519";
}
{
path = "/persist/ssh/ssh_host_rsa_key";
type = "rsa";
bits = 4096;
}
];
};
services.postgresql.dataDir =
"/persist/postgresql/${config.services.postgresql.package.psqlSchema}";
}