root@slave2:/home/vagrant# sudo su -
root@slave2:/home/vagrant# add-apt-repository ppa:cz.nic-labs/knot-dns-latest
root@slave2:/home/vagrant# apt-get update
root@slave2:/home/vagrant# apt-get install knot
root@slave2:/home/vagrant# systemd disable --now systemd-resolved
root@slave2:/home/vagrant# echo "nameserver 8.8.4.4" > /etc/resolv.conf
root@slave2:/home/vagrant# cat << EOF > /etc/knot/knot.conf
server:
    rundir: "/run/knot"
    user: knot:knot
    listen: [ 0.0.0.0@53, ::@53 ]

log:
  - target: syslog
    any: debug

database:
    storage: "/var/lib/knot"

remote:
  - id: master
    address: 192.168.50.4

acl:
  - id: master_notify
    address: 192.168.50.4
    action: notify

template:
  - id: catz-reverse
    master: master
    acl: master_notify

zone:
  - domain: catalogzone.
    master: master
    acl: master_notify
    catalog-role: interpret
    catalog-template: catz-reverse
EOF
root@slave2:/home/vagrant# service knot restart
root@slave2:/home/vagrant# journalctl -f -n -u knot.service
Mar 17 10:52:14 slave2 systemd[1]: Starting Knot DNS server...
Mar 17 10:52:14 slave2 knotc[9834]: Configuration is valid
Mar 17 10:52:15 slave2 knotd[9845]: info: Knot DNS 3.1.6 starting
Mar 17 10:52:15 slave2 knotd[9845]: info: loaded configuration file '/etc/knot/knot.conf', mapsize 512 MiB
Mar 17 10:52:15 slave2 knotd[9845]: info: using UDP reuseport, incoming TCP Fast Open
Mar 17 10:52:15 slave2 knotd[9845]: info: binding to interface 0.0.0.0@53
Mar 17 10:52:15 slave2 knotd[9845]: info: binding to interface ::@53
Mar 17 10:52:15 slave2 knotd[9845]: info: loading 1 zones
Mar 17 10:52:15 slave2 knotd[9845]: info: [catalogzone.] zone will be loaded
Mar 17 10:52:15 slave2 knotd[9845]: info: starting server
Mar 17 10:52:15 slave2 knotd[9845]: info: [catalogzone.] failed to parse zone file '/var/lib/knot/catalogzone.zone' (not exists)
Mar 17 10:52:15 slave2 knotd[9845]: info: [catalogzone.] zone will be bootstrapped
Mar 17 10:52:15 slave2 knotd[9845]: info: server started in the foreground, PID 9845
Mar 17 10:52:15 slave2 knotd[9845]: info: control, binding to '/run/knot/knot.sock'
Mar 17 10:52:15 slave2 systemd[1]: Started Knot DNS server.
Mar 17 10:52:15 slave2 knotd[9845]: info: [catalogzone.] AXFR, incoming, remote 192.168.50.4@53, started
Mar 17 10:52:15 slave2 knotd[9845]: info: [catalogzone.] AXFR, incoming, remote 192.168.50.4@53, finished, 0.00 seconds, 1 messages, 11733 bytes
Mar 17 10:52:15 slave2 knotd[9845]: info: [catalogzone.] catalog reloaded, 108 updates
Mar 17 10:52:15 slave2 knotd[9845]: info: [catalogzone.] refresh, remote 192.168.50.4@53, zone updated, 0.00 seconds, serial none -> 2022031401
Mar 17 10:52:15 slave2 knotd[9845]: info: [xx.xx.xx.in-addr.arpa.] zone will be loaded
Mar 17 10:52:15 slave2 knotd[9845]: info: [xx.xx.xx.in-addr.arpa.] zone added from catalog
Mar 17 10:52:15 slave2 knotd[9845]: info: [yy.yy.yy..in-addr.arpa.] zone will be loaded
Mar 17 10:52:15 slave2 knotd[9845]: info: [yy.yy.yy.in-addr.arpa.] zone added from catalog
Mar 17 10:52:15 slave2 knotd[9845]: info: [zz.zz.zz.in-addr.arpa.] zone will be loaded
Mar 17 10:52:15 slave2 knotd[9845]: info: [zz.zz.zz.in-addr.arpa.] zone added from catalog
Mar 17 10:52:15 slave2 knotd[9845]: info: [aa.aa.aa.in-addr.arpa.] failed to parse zone file '/var/lib/knot/aa.aa.aa.in-addr.arpa.zone' (not exists)
....