submitted 5 months ago by Cyber@feddit.uk to c/selfhosted@lemmy.world

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After being home for weeks, I went away for business, the 1st night away there was a brief powercut and the firewall (on a UPS) seemed to get stuck.

So, that's no DNS, DHCP, or connectivity between wifi and LAN... All due to (admittedly aging) hardware issue.

Since then my entire home system has had issues whilst it all settles down.

It made me think about getting some redundancy into the system to handle a single failure.

So,.can you give me any insights into High Availability like CARP (for pfSense), VM failover (on Incus?), mesh wifi, Home Assistant, etc?

Of course there are going to be single points, like ISP line, etc, but seems like something to test out.

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[-] neidu3@sh.itjust.works 1 points 5 months ago* (last edited 5 months ago)

Both dhcpd and bind support failover.

If you want to have failover storage you might want to look into beegfs, as storage targets can be mirrored across hosts.

Source: Using all of the above at work. I've had motherboards die on me without causing downtime.

[-] Cyber@feddit.uk 1 points 5 months ago

Not heard of BeeGFS, had a quick look on the Arch wiki... looks quite involved...

But, ok, at least I know that the DHCP part can be dealt with - thanks.

[-] neidu3@sh.itjust.works 2 points 5 months ago

I use beegfs at work for the redundancy and clustering aspect. 1.8PB of storage with 100% redundancy.

While it supports a lot and CAN be quite involved, a very basic setup is in fact pretty simple:

A filesystem on a machine is a storage target.
A machine with storage targets is a storage node. (beegfs-storage)
A management server (beegfs-mgmtd) connects these together into a filesystem.
Any machine runs beegfs-client to mount this filesystem.
One machine needs to run beegfs_meta for the Metadata. It doesn't require a lot.

this post was submitted on 31 Jan 2026

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