56 lines
1.5 KiB
Nix
56 lines
1.5 KiB
Nix
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{ lib, ... }:
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{
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# A setup which would clean root subvolume between boots remove automatically removed roots that
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# are older than one day:
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#
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# Source: https://github.com/nix-community/impermanence
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boot.initrd.postDeviceCommands = lib.mkAfter ''
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mkdir /btrfs_tmp
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mount /dev/mapper/luksroot /btrfs_tmp
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if [[ -e /btrfs_tmp/root ]]; then
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mkdir -p /btrfs_tmp/old_roots
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timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:%M:%S")
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mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
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fi
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delete_subvolume_recursively() {
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IFS=$'\n'
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for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
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delete_subvolume_recursively "/btrfs_tmp/$i"
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done
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btrfs subvolume delete "$1"
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}
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for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +1); do
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delete_subvolume_recursively "$i"
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done
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btrfs subvolume create /btrfs_tmp/root
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umount /btrfs_tmp
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rm -r /btrfs_tmp
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'';
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age.identityPaths = map (v: "/persistent/system/etc/ssh/${v}") [
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"ssh_host_rsa_key"
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"ssh_host_ed25519_key"
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];
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environment.persistence."/persistent/system" = {
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hideMounts = true;
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directories = [
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"/var/lib/bluetooth"
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"/var/lib/nixos"
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"/var/lib/systemd/coredump"
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"/etc/NetworkManager/system-connections"
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];
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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_rsa_key.pub"
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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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];
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};
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}
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