technitium 
Making Technitium DNS Survive a Proxmox Host Failure
Adding ZFS replication and Proxmox HA to a two-container Technitium DNS setup, the order of operations that tripped me up, a real migration test, and Uptime Kuma monitoring.
Goodbye AdGuard Home: Five VLANs, One Technitium DNS Cluster
Replacing five AdGuard Home instances with two clustered Technitium DNS servers: one DHCP server for every VLAN, separate blocking policies per network, and a few things that didn't work the first time.