146 lines
7.9 KiB
Nix
146 lines
7.9 KiB
Nix
{ config, lib, ... }:
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# common impermanence config for all of my hosts
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let
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cfg = config.impermanence;
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in {
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options.impermanence = with lib; mkOption {
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type = types.submodule {
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options = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = "Enable impermanence";
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};
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path = mkOption {
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type = types.path;
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default = throw "You must set path to persistent storage";
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description = "Default path for persistence";
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};
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directories = mkOption {
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type = with types; listOf (either path attrs);
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default = [ ];
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description = "Extra directories to persist";
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};
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files = mkOption {
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type = with types; listOf (either path attrs);
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default = [ ];
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description = "Extra files to persist";
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};
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persistTmp = mkOption {
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type = types.bool;
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default = true;
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description = "Persist /tmp (and clean on boot)";
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};
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};
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};
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description = "Impermanence settings";
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default = { };
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};
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config = lib.mkIf cfg.enable {
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users.mutableUsers = false;
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# why is this not part of base NixOS?
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systemd.tmpfiles.rules = [ "d /var/lib/systemd/pstore 0755 root root 14d" ];
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# as weird as it sounds, I won't use tmpfs for /tmp in case I'll have to put files over 2GB there
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boot.tmp.cleanOnBoot = lib.mkIf cfg.persistTmp true;
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environment.persistence.${toString cfg.path} = {
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hideMounts = true;
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directories = map (x:
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if builtins.isPath x then toString x
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else if builtins.isPath (x.directory or null) then x // { directory = toString x.directory; }
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else x
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) ([
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# the following two can't be created by impermanence (i.e. they have to exist on disk in stage 1)
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{ directory = /var/lib/nixos; user = "root"; group = "root"; mode = "0755"; }
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{ directory = /var/log; user = "root"; group = "root"; mode = "0755"; }
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# persist this since everything here is cleaned up by systemd-tmpfiles over time anyway
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# ...or so I'd like to believe
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{ directory = /var/lib/systemd; user = "root"; group = "root"; mode = "0755"; }
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{ directory = /var/tmp; user = "root"; group = "root"; mode = "1777"; }
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{ directory = /var/spool; user = "root"; group = "root"; mode = "0777"; }
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] ++ lib.optionals cfg.persistTmp [
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{ directory = /tmp; user = "root"; group = "root"; mode = "1777"; }
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] ++ lib.optionals config.services.mullvad-vpn.enable [
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{ directory = /etc/mullvad-vpn; user = "root"; group = "root"; mode = "0700"; }
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{ directory = /var/cache/mullvad-vpn; user = "root"; group = "root"; mode = "0755"; }
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] ++ lib.optionals config.virtualisation.libvirtd.enable ([
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# { directory = /var/cache/libvirt; user = "root"; group = "root"; mode = "0755"; }
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{ directory = /var/lib/libvirt; user = "root"; group = "root"; mode = "0755"; }
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] ++ lib.optionals config.virtualisation.libvirtd.qemu.swtpm.enable [
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{ directory = /var/lib/swtpm-localca; user = "root"; group = "root"; mode = "0750"; }
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]) ++ lib.optionals config.networking.wireless.iwd.enable [
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{ directory = /var/lib/iwd; user = "root"; group = "root"; mode = "0700"; }
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] ++ lib.optionals (builtins.any (x: x.useDHCP != false) (builtins.attrValues config.networking.interfaces) || config.networking.useDHCP) [
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{ directory = /var/db/dhcpcd; user = "root"; group = "root"; mode = "0755"; }
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] ++ lib.optionals config.services.gitea.enable [
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{ directory = /var/lib/gitea; user = "gitea"; group = "gitea"; mode = "0755"; }
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] ++ lib.optionals config.services.matrix-synapse.enable [
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{ directory = /var/lib/matrix-synapse; user = "matrix-synapse"; group = "matrix-synapse"; mode = "0700"; }
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] ++ lib.optionals config.services.heisenbridge.enable [
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{ directory = /var/lib/heisenbridge; user = "heisenbridge"; group = "heisenbridge"; mode = "0755"; }
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] ++ lib.optionals config.services.murmur.enable [
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{ directory = /var/lib/murmur; user = "murmur"; group = "murmur"; mode = "0700"; }
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] ++ lib.optionals config.services.nextcloud.enable [
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{ directory = /var/lib/nextcloud; user = "nextcloud"; group = "nextcloud"; mode = "0750"; }
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] ++ lib.optionals config.services.botamusique.enable [
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{ directory = /var/lib/private/botamusique; user = "root"; group = "root"; mode = "0750"; }
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] ++ lib.optionals config.security.acme.acceptTerms [
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{ directory = /var/lib/acme; user = "acme"; group = "acme"; mode = "0755"; }
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] ++ lib.optionals config.services.printing.enable [
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{ directory = /var/lib/cups; user = "root"; group = "root"; mode = "0755"; }
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{ directory = /var/cache/cups; user = "root"; group = "lp"; mode = "0770"; }
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] ++ lib.optionals config.services.fail2ban.enable [
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{ directory = /var/lib/fail2ban; user = "root"; group = "root"; mode = "0700"; }
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] ++ lib.optionals config.services.opendkim.enable [
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{ directory = /var/lib/opendkim; user = "opendkim"; group = "opendkim"; mode = "0700"; }
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] ++ lib.optionals config.services.pleroma.enable [
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{ directory = /var/lib/pleroma; user = "pleroma"; group = "pleroma"; mode = "0700"; }
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] ++ lib.optionals config.services.akkoma.enable [
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{ directory = /var/lib/akkoma; user = "akkoma"; group = "akkoma"; mode = "0700"; }
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] ++ lib.optionals config.services.hydra.enable [
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{ directory = /var/lib/hydra; user = "hydra"; group = "hydra"; mode = "0755"; }
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] ++ lib.optionals config.services.grafana.enable [
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{ directory = /var/lib/grafana; user = "grafana"; group = "grafana"; mode = "0755"; }
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] ++ lib.optionals config.services.prometheus.enable [
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{ directory = /var/lib/${config.services.prometheus.stateDir}; user = "prometheus"; group = "prometheus"; mode = "0755"; }
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] ++ lib.optionals config.services.postfix.enable [
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{ directory = /var/lib/postfix; user = "root"; group = "root"; mode = "0755"; }
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] ++ lib.optionals config.services.postgresql.enable [
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{ directory = /var/lib/postgresql; user = "postgres"; group = "postgres"; mode = "0755"; }
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] ++ lib.optionals config.services.unbound.enable [
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{ directory = /var/lib/unbound; user = "unbound"; group = "unbound"; mode = "0755"; }
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] ++ lib.optionals config.services.searx.enable [
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{ directory = /var/lib/searx; user = "searx"; group = "searx"; mode = "0700"; }
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] ++ lib.optionals config.services.roundcube.enable [
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{ directory = /var/lib/roundcube; user = "roundcube"; group = "roundcube"; mode = "0700"; }
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] ++ lib.optionals config.services.rspamd.enable [
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{ directory = /var/lib/rspamd; user = "rspamd"; group = "rspamd"; mode = "0700"; }
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] ++ lib.optionals (config.services.redis.servers.rspamd.enable or false) [
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{ directory = /var/lib/redis-rspamd; user = "redis-rspamd"; group = "redis-rspamd"; mode = "0700"; }
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] ++ lib.optionals config.services.dovecot2.enable [
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{ directory = /var/lib/dhparams; user = "root"; group = "root"; mode = "0755"; }
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{ directory = /var/lib/dovecot; user = "root"; group = "root"; mode = "0755"; }
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] ++ lib.optionals config.security.sudo.enable [
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{ directory = /var/db/sudo/lectured; user = "root"; group = "root"; mode = "0700"; }
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] ++ cfg.directories);
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files = map (x:
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if builtins.isPath x then toString x
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else if builtins.isPath (x.file or null) then x // { file = toString x.file; }
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else x
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) ([
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# hardware-related
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/etc/adjtime
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# needed at least for /var/log
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/etc/machine-id
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] ++ lib.optionals config.services.openssh.enable [
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# keep ssh fingerprints stable
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/etc/ssh/ssh_host_ed25519_key
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/etc/ssh/ssh_host_ed25519_key.pub
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/etc/ssh/ssh_host_rsa_key
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/etc/ssh/ssh_host_rsa_key.pub
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] ++ cfg.files);
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};
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};
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}
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