[knot-dns-users] Knot DNS - backup strategy

Hello all,     my Knot DNS is now in production and I would like to setup some backup tasks for the configuration and of course keys. Are there any recommendations regarding backup? And restore? I can see that it is very easy to dump current config but I am to sure how to backup keys. What do you recommend? Save the content of /var/lib/knot on a hourly/daily basis? I am not using shared keys. Thanks With regards Ales