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How do you host your DNS sinkhole/resolver? (sh.itjust.works)

submitted 4 days ago* (last edited 2 days ago) by [email protected] to c/[email protected]

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Currently have nice long docker compose file that hosts my PiHole V6 container (along with a bunch of other containers) however, reason i ask this question is because whenever I go to pull an updated image and recreate the container I experience about 20 minutes of no DNS resolution which to my knowledge is due to the NTP clock being out of sync.

What’s the best way to host a DNS sinkhole/resolver that can mitigate this issue?

Was thinking of utilizing Proxmox & LXC but I suspect I’ll get the same experience.

~~Update: Turns out PiHole doesn’t support two instances, I got both of them on separate devices also set the 2nd DNS server in my routers WAN & LAN DNS settings which did in fact split DNS between both instances however, I lost access to my routers web-ui, my Traefik instance & reverse proxies died and I lost all internet access.~~

~~So, don’t do what I did.~~

Update 2: So everything I said in my first update let’s disregard that, turns out I had my router forcing all DNS to PiHole server 1 which caused my issues mentioned above.

Two servers appears to work!

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[–] [email protected] 13 points 3 days ago (17 children)

If you run a single DNS server, you will always have downtime when it's restarted.

The only way to mitigate that, is to run 2 DNS servers.

I setup my network to use pihole as the first DNS and the router as the second, most of the time pihole is used. Unless it's down

[–] [email protected] 9 points 3 days ago (10 children)

How do you set up clients so they will always use the first one? I thought if a client knows 2 servers they will switch between them.

I plan to add a second Pihole at some point and keep them synced

[–] [email protected] 3 points 3 days ago (1 children)

Are you using pihole to also create custom local DNS records?

[–] [email protected] 2 points 3 days ago

Yes, mostly just the hostnames

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