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this post was submitted on 11 Oct 2023
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That’s a good idea that I hadn’t considered. I’ll see if I can get Pihole running on an old android phone I have lying around.
Edit: I now have PiHole running on an old Pixel 3a and have decommissioned my PiHole docker container on my home server.
My server and a raspberry are running adguard home
Both have autoupdate with autoreboot. If I need to change something, connect, disconnected, everything will continue working
I have a google router and It allows me to enter 2 DNS servers incase the first DNS Server doesnt work.
That's pretty standard for nearly every router and Internet connected device. There is almost always a setting for Primary and Secondary DNS servers. Sometimes you can even set more (ie. 2 IPv6 DNS servers in addition to the 2 IPv4 DNS servers)
You should probably also sync them. I use orbital sync for this. https://github.com/mattwebbio/orbital-sync
Or gravity-sync. I use two Pi-holes with gravity-sync and it's very reliable and effortless.
I run pihole on a proxmox cluster (lxc containers), 2 separate IPs and I setup keepalived and made the virtual IP the primary dns ip that my dhcp server hands out, pihole1 is the master and pihole2 secondary. I use gravity sync to keep both piholes in sync. Works very well and I can reboot one at a time without losing dns at all. Techno tim on YouTube has a guide on how to setup keepalived on 2 pihole servers that helped me set it up.
This is not an answer to the question at all
Yeah it is? There's a reason your dns confutation has a backup IP address.
That is true. But a simple service like dsn doesn't go sideways every month usually. If he gets two of these services running, he just had double the trouble.