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Should I use a dedicated DHCP/DNS server hardware (lemmy.world)

submitted 10 months ago* (last edited 10 months ago) by [email protected] to c/[email protected]

29 comments fedilink hide all child comments

My current setup has my DHCP + DNS on my Unifi USG. However, as I have all my apps hosted on a different server (unifi, plex, home assistant, NAS, etc.) I've ran into issues trying to get things set up.

Basically, Unifi needs to know where the unifi server is, but it's assigning the IP address to it.

Should I put DHCP+DNS onto it's own system? Should I put it on my current server? And any non-Pi recommendations for systems? (I've had the PI filesystem clobber itself too many times)

Edit: I'm starting to think that the real problem is having UNIFI on the same system as the server, as it prevents me reconfiguring any of the server routing information without also disconnecting unifi...

Edit 2: I'm going to try switching the server from a static DHCP lease to a static IP. If that's doesn't work, then I think I'll move the unifi server onto it's own system. Thanks!

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[–] [email protected] 4 points 10 months ago (3 children)

Sidnenote about the PI filesystem self-clobbering: Are you running off of an SD card? Running off an external SSD is way more reliable in my experience. Even a decent USB stick tends to be better than micro-SD in the long run, but even the cheapest external SSD blows both of them out of the water. Since I switched my PIs over to that, they've never had any disk-related issues.

[–] [email protected] 1 points 10 months ago (1 children)

I've completely bricked two SD cards using a Pi. The USB option sounds interesting, I'll have to try it.

[–] [email protected] 2 points 10 months ago (1 children)

Grab this cable: https://www.amazon.com/gp/product/B00XLAZODE/ (make sure it's the USB 3.1 version, not the USB 3.0) then plug in any SATA device. you should be able to find a 512GB SATA SSD for less than $40.

[–] [email protected] 1 points 10 months ago

Damn this is so much simpler than the USB 2 version I have from 8 years ago...

[–] [email protected] 1 points 10 months ago

You can use log2ram to mitigate that.

Alternatively, you can even boot a root filesystem residing on an NFS share, but in the case of a rpi hosting the network's DNS and DHCP services, you could end up with a chicken and egg problem.

[–] [email protected] 0 points 10 months ago (1 children)

Yeah, whoever thought that sd cards were a good idea for anything even resembling operating systems is a dum dum

[–] [email protected] 4 points 10 months ago (1 children)

what do you mean? they're fine unless you want to read or write to them... wait a minute

[–] [email protected] 3 points 10 months ago

They're fine if the OS is read-only. Unraid loads from a USB drive, but the entire OS is copied into RAM on boot and there's barely any reads or writes after that.