sudo systemctl disable systemd-resolved
sudo systemctl stop systemd-resolved

sudo ls -lh /etc/resolv.conf
sudo rm /etc/resolv.conf
sudo echo "nameserver 1.1.1.1" > /etc/resolv.conf

sudo apt-get update
sudo apt-get install pdns-server pdns-backend-mysql

nano /etc/powerdns/pdns.d/pdns.local.gmysql.conf

launch+=gmysql
gmysql-host=xxx.xxx.xxx.xxx
gmysql-user=webserver_dns
gmysql-dbname=webserver_dns
gmysql-password=secret
gmysql-dnssec=yes

sudo systemctl restart pdns