As I am setting up my infrastructure at home using docker I wanted to ask, is it better to have DNS, something like pi-hole, on my main docker swarm or would it be better to have it on a dedicated machine/docker host separate from the rest of my infrastructure?
My primary DNS is pihole on a rpi dedicated to the task; but I run a second instance of pihole via my main docker stack for redundancy. Should one or the other be unavailable, there's a second one to pick up the slack.
I just provide both DNS IPs to LAN clients via DHCP.
Gravity Sync is a great tool to keep both piholes settings/records/lists in sync.