118 lines
7.2 KiB
Nix
118 lines
7.2 KiB
Nix
# borrows from:
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# https://xeiaso.net/blog/paranoid-nixos-2021-07-18
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# https://elis.nu/blog/2020/05/nixos-tmpfs-as-root/
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# https://github.com/nix-community/impermanence
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{ lib, config, impermanence, ... }:
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with lib;
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let
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cfg = config.colinsane.impermanence;
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in
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{
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imports = [
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# TODO: move to flake.nix?
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impermanence.nixosModule
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];
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options = {
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colinsane.impermanence.enable = mkOption {
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default = false;
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type = types.bool;
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};
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};
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config = mkIf cfg.enable {
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environment.persistence."/nix/persist" = {
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directories = [
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/archive"; }
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/dev"; }
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/records"; }
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/ref"; }
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/tmp"; }
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/use"; }
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/Music"; }
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/Pictures"; }
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/Videos"; }
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# cache is probably too big to fit on the tmpfs
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# TODO: we could bind-mount it to something which gets cleared per boot, though.
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/.cache"; }
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/.ssh"; }
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# intentionally omitted:
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# "/home/colin/.config" # managed by home-manager
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# "/home/colin/.local" # nothing useful in here
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# "/home/colin/.mozilla" # managed by home-manager
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# creds. TODO: can i manage this with home-manager?
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/.config/spotify"; }
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# creds, but also 200 MB of node modules, etc
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/home/colin/.config/discord"; }
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{ user = "root"; group = "root"; mode = "0700"; directory = "/etc/NetworkManager/system-connections"; }
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# "/etc/nixos"
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{ user = "root"; group = "root"; mode = "0755"; directory = "/etc/ssh"; }
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# "/var/lib/AccountsService" # not sure what this is, but it's empty
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/lib/alsa"; } # preserve output levels, default devices
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# "/var/lib/blueman" # files aren't human readable
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/lib/bluetooth"; } # preserve bluetooth handshakes
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/lib/colord"; } # preserve color calibrations (?)
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/lib/duplicity"; } # we need this mostly because of the size of duplicity's cache
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# "/var/lib/dhclient" # empty on lappy; dunno about desko
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# "/var/lib/fwupd" # not sure why this would need persistent state
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# "/var/lib/geoclue" # empty on lappy
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# "/var/lib/lockdown" # empty on desko; might store secrets after iOS handshake?
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# "/var/lib/logrotate.status" # seems redundant with what's in /var/log?
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/lib/machines"; } # maybe not needed, but would be painful to add a VM and forget.
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# "/var/lib/misc" # empty on lappy
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# "/var/lib/NetworkManager" # looks to be mostly impermanent state?
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# "/var/lib/NetworkManager-fortisslvpn" # empty on lappy
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/lib/nixos"; } # has some uid/gid maps; not sure what happens if we lose this.
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# "/var/lib/PackageKit" # wtf is this?
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# "/var/lib/power-profiles-daemon" # redundant with nixos declarations
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# "/var/lib/private" # empty on lappy
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# "/var/lib/systemd" # nothing obviously necessary
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# "/var/lib/udisks2" # empty on lappy
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# "/var/lib/upower" # historic charge data. unnecessary, but maybe used somewhere?
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#
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# servo additions:
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{ user = "998"; group = "996"; mode = "0755"; directory = "/var/lib/acme"; } # TODO: mode?
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# "/var/lib/dhparams" # https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/security/dhparams.nix
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# "/var/lib/dovecot"
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# "/var/lib/duplicity"
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{ user = "994"; group = "993"; mode = "0755"; directory = "/var/lib/gitea"; } # TODO: mode? could be more granular
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{ user = "261"; group = "261"; mode = "0755"; directory = "/var/lib/ipfs"; } # TODO: mode? could be more granular
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/lib/jackett"; } # TODO: mode? we only need this to save Indexer creds ==> migrate to config?
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{ user = "996"; group = "994"; mode = "0755"; directory = "/var/lib/jellyfin"; } # TODO: mode? could be more granular
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{ user = "993"; group = "992"; mode = "0755"; directory = "/var/lib/matrix-appservice-irc"; } # TODO: mode?
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{ user = "224"; group = "224"; mode = "0755"; directory = "/var/lib/matrix-synapse"; } # TODO: mode?
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{ user = "221"; group = "221"; mode = "0755"; directory = "/var/lib/opendkim"; } # TODO: mode? move this to the nix config (SOPS)
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{ user = "997"; group = "995"; mode = "0755"; directory = "/var/lib/pleroma"; } # TODO: mode? could be more granular
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{ user = "71"; group = "71"; mode = "0755"; directory = "/var/lib/postgresql"; } # TODO: mode?
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/lib/postfix"; } # TODO: mode? could be more granular
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{ user = "70"; group = "70"; mode = "0755"; directory = "/var/lib/transmission"; } # TODO: mode? we need this specifically for the stats tracking in .config/
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{ user = "colin"; group = "users"; mode = "0755"; directory = "/var/lib/uninsane"; }
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/log"; }
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{ user = "root"; group = "root"; mode = "0755"; directory = "/var/backup"; } # for e.g. postgres dumps
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# TODO: what even GOES in /srv?
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{ user = "root"; group = "root"; mode = "0755"; directory = "/srv"; }
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];
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files = [
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"/etc/machine-id"
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# "/home/colin/knowledge"
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"/home/colin/.zsh_history"
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# # XXX these only need persistence because i have mutableUsers = true, i think
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# "/etc/group"
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# "/etc/passwd"
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# "/etc/shadow"
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# { file = "/home/test2"; persistentStoragePath = "/nix/persist"; }
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];
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};
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systemd.services.sane-sops = {
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description = "sops relies on /etc/ssh being available, so re-run its activation AFTER fs-local";
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script = config.system.activationScripts.setupSecrets.text;
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after = [ "fs-local.target" ];
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wantedBy = [ "multi-user.target" ];
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};
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};
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}
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