forked from jan-leila/nix-config
100 lines
2.9 KiB
Nix
100 lines
2.9 KiB
Nix
{
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config,
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lib,
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...
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}: {
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options.host.impermanence.enable = lib.mkEnableOption "are we going to use impermanence on this device";
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config = lib.mkMerge [
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{
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assertions = [
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{
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assertion = !(config.host.impermanence.enable && !config.host.storage.enable);
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message = ''
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Disko storage must be enabled to use impermanence.
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'';
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}
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];
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}
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(
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lib.mkIf config.host.impermanence.enable {
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assertions = [
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{
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assertion = config.host.impermanence.enable && config.host.storage.enable;
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message = "Impermanence can not be used without managed host storage.";
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}
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];
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# fixes issues with /var/lib/private not having the correct permissions https://github.com/nix-community/impermanence/issues/254
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system.activationScripts."createPersistentStorageDirs".deps = ["var-lib-private-permissions" "users" "groups"];
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system.activationScripts = {
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"var-lib-private-permissions" = {
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deps = ["specialfs"];
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text = ''
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mkdir -p /persist/system/root/var/lib/private
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chmod 0700 /persist/system/root/var/lib/private
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'';
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};
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};
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programs.fuse.userAllowOther = true;
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boot.initrd.postResumeCommands = lib.mkAfter ''
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zfs rollback -r rpool/local/system/root@blank
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'';
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fileSystems = {
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"/".neededForBoot = true;
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"/persist/system/root".neededForBoot = true;
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"/persist/system/var/log".neededForBoot = true;
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};
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host.storage.pool.extraDatasets = {
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# persist datasets are datasets that contain information that we would like to keep around
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"persist" = {
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type = "zfs_fs";
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options.canmount = "off";
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options = {
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"com.sun:auto-snapshot" = "true";
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};
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};
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# this is where root data actually lives
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"persist/system/root" = {
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type = "zfs_fs";
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mountpoint = "/persist/system/root";
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};
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"persist/system/var/log" = {
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type = "zfs_fs";
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mountpoint = "/persist/system/var/log";
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# logs should be append only so we shouldn't need to snapshot them
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options = {
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"com.sun:auto-snapshot" = "false";
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};
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};
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};
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environment.persistence."/persist/system/var/log" = {
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enable = true;
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hideMounts = true;
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directories = [
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"/var/log"
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];
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};
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environment.persistence."/persist/system/root" = {
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enable = true;
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hideMounts = true;
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directories = [
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"/var/lib/nixos"
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"/var/lib/systemd/coredump"
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];
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files = [
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"/etc/machine-id"
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];
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};
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security.sudo.extraConfig = "Defaults lecture=never";
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}
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)
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];
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}
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