50 lines
1 KiB
Nix
50 lines
1 KiB
Nix
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{ config, lib, ... }:
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let
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cfg = config.custom.impermanence;
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in
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{
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options.custom.impermanence.enable = lib.mkOption {
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type = lib.types.bool;
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default = false;
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};
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config = lib.mkIf cfg.enable {
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# Default set of directories we always want to persist
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environment.persistence."/persist" = {
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enable = true;
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hideMounts = true;
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files = [
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"/etc/machine-id"
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"/etc/ssh/ssh_host_rsa_key"
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"/etc/ssh/ssh_host_ed25519_key"
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];
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directories = [
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"/var/lib/systemd/timers"
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"/var/lib/nixos"
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"/var/log"
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];
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};
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fileSystems."/persist".neededForBoot = true;
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services = {
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fstrim.interval = "daily";
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zfs = {
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autoScrub.enable = true;
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autoSnapshot = {
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enable = true;
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flags = "-k -p --utc";
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};
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trim.interval = "daily";
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};
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};
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boot.initrd.postResumeCommands = lib.mkAfter ''
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zfs rollback -r zroot/root@blank
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zfs rollback -r zroot/home@blank
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'';
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};
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}
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