59 lines
1.6 KiB
Nix
59 lines
1.6 KiB
Nix
{ lib, ... }:
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{
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environment.persistence."/persist" = {
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enable = true;
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directories = [
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"/var/lib/nixos"
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"/var/lib/acme"
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"/var/lib/prometheus2"
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"/var/lib/immich"
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"/var/lib/redis-immich"
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"/var/lib/postgresql"
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"/var/lib/grafana"
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"/var/lib/freshrss"
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];
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files = [
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# so that systemd doesn't think each boot is the first
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"/etc/machine-id"
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# ssh host keys
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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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# tailscale
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"/var/lib/tailscale/tailscaled.state"
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];
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users.rpqt = {
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directories = [ ];
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files = [ ];
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};
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};
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# Empty root and remove snapshots older than 30 days
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boot.initrd.postDeviceCommands = lib.mkAfter ''
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mkdir /btrfs_tmp
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mount /dev/disk/by-label/nixos /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 $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +30); do
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delete_subvolume_recursively "$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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rmdir /btrfs_tmp
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'';
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}
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