Comment on Noob question about PiHole
rentar42@kbin.social 10 months ago
The issue is that according to the spec the two DNS servers provided by DHCP are equivalent. While most clients favor the first one as the default, that's not universally the case and when and how it switches to the secondary can vary by client (and effectively appear random). So you won't be able to know for sure which client uses your DNS, especially after your DNS server was unreachable for a while for whatever reason. Personally I've "just" gotten a second Pi to run redundant copies of PiHole, but only having a single DNS server is usually fine as well.
Kir@feddit.it 10 months ago
This answered my question. Thank you. I guess I will sacrifice redundancy
Froyn@kbin.social 10 months ago
Or set up a second pi-hole.
dorkage@lemmy.ca 10 months ago
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 10 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 10 months ago
How do you manage automatically transferring the ip of the main rpi to the backup rpi when the first disappears?