os/hosts/droppie/restic-backup.nix

51 lines
1.3 KiB
Nix

{pkgs, ...}: let
shutdownWaitMinutes = 10;
shutdownScript = pkgs.writeShellScriptBin "shutdown-wait" ''
STATUS_FILES="/media/internal/backups-pub-solar/status"
running=""
for f in $STATUS_FILES; do
declare started
declare finished
started=$(source $f ; echo ''${BACKUP_STARTED})
finished=$(source $f ; echo ''${BACKUP_FINISHED})
if [ -z "''${finished}" ]; then
echo "backup $(dirname $f) still running"
running="yes"
break
fi
done
if [ -n "''${running}" ] && [ "''${running}" = "yes" ]; then
echo "backups are still running"
exit 1
fi
echo "WARNING: System will be shut down within the next ${builtins.toString shutdownWaitMinutes} minutes" | ${pkgs.util-linux}/bin/wall
sleep 10
shutdown -P +${builtins.toString shutdownWaitMinutes}
'';
in {
systemd.services."shutdown-after-backup" = {
enable = true;
serviceConfig = {
ExecStart = "${shutdownScript}/bin/shutdown-wait";
Type = "oneshot";
};
};
systemd.timers."shutdown-after-backup" = {
enable = true;
timerConfig = {
OnCalendar = "*-*-* 02..09:00,15,30,45:00 Etc/UTC";
};
wantedBy = ["timers.target"];
partOf = ["shutdown-after-backup.service"];
};
}