this post was submitted on 17 Jan 2024
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29
Noob question about PiHole (feddit.it)
submitted 6 months ago by Kir@feddit.it to c/selfhosted@lemmy.world
44 comments fedilink hide all child comments
 

Hy everyone, I have a PiHole instance running on my home server, and I changed my router (Fritz box) DNS in order to use my PiHole. Everything runs great.

I was wondering if I can put another DNS provider on my "alternative DNS server" in my router, in order to have a fallback alternative in case my server is down, or if I should avoid it.

I'm asking this because I don't know if the request will be handled in parallel between the two DNS provider (that would make my PiHole useless) or not. Thank you.

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[–] Froyn@kbin.social 6 points 6 months ago (1 children)

Or set up a second pi-hole.

[–] dorkage@lemmy.ca 3 points 6 months ago (2 children)

I run multiple pinholes using keepalived. Then I only use one DNS in my DHCP server. Second pihole will seemlessly take over if the first one goes down whilst using the original DNS address.

Work quite well. I had to learn the hard way that only using a single pihole was just asking for my partner to be mad when it didn't work / when I was doing server maintenance. Now I have multiple and they can all seemlessly take over if any my server nodes are down

[–] Lordjohn68@lemmy.world 1 points 5 months ago

Keepalived is the way. Gravity sync keeps everything in line. Works like a charm. I migrated yesterday from wifi to wired and cannot be happier. As a bonus did not need to reconfigure pivpn.

[–] Darkassassin07@lemmy.ca 1 points 5 months ago (2 children)

How do you manage automatically transferring the ip of the main rpi to the backup rpi when the first disappears?

[–] dorkage@lemmy.ca 2 points 5 months ago

Keepalived

[–] bigMouthCommie@kolektiva.social -3 points 5 months ago (1 children)

clone the Mac address

[–] Darkassassin07@lemmy.ca 1 points 5 months ago (2 children)

Don't you then run into MAC conflicts?

How do you keep both on the network?

[–] bigMouthCommie@kolektiva.social -2 points 5 months ago

oh. fuck.

Arduino? lol

[–] bigMouthCommie@kolektiva.social -3 points 5 months ago (1 children)

I'm just spit balling here: backup pi pings munute-ly main pi. if main pi is down 2 pings, it resets Mac and reboots network interface.

[–] Darkassassin07@lemmy.ca 1 points 5 months ago (1 children)

Then when the main PI returns it creates a conflict...

[–] bigMouthCommie@kolektiva.social -2 points 5 months ago

oh hm...

hmmm

ok. both pis know the live IP and the backup IP, and have the same config: cold boot into backup I and ping live ip