2y ago

HA redundancy options

I'm currently running HA on a Pi3... it works fine, but it's now a single point of failure.

I have some new hardware arriving to run VMs in and was intending to move HA to it, but now I'm wondering if I can have HA in 2 places for fault tolerance.

I'm aware that there's no built-in failover options, but has anyone done something similar?

9 comments

If you succeed, how do you plan to handle ZigBee or Zwave connections? I'm a bit unhappy with my ZigBee dongle remaining a single point of failure.
- I don't have any zigbee devices at the moment, but I was looking into network based ones... not sure if I can have 2 of those? (Again, no zigbee expirence yet to know the options)
  Best Zigbee Coordinators for Home Assistant 2023
  
  From everything I've seen, the networked ones are never recommended over USB dongles.
HA might be possible in a active passive configuration if you don't have any dependencies on external hardware like a zigbee stick. Active active would need support by HA and I don't think that is implemented.
I think the most secure thing is to keep regular backups so you can roll back easily.
- Thanks, yes, I think active-active would be another magnitude harder... and would need database, history, etc on shared storage... over the top to jist ensure the lights stay on.
  And backups are essential for all use cases (and not just the built-in HA backup left on the device / VM / container that just failed!)
  Thanks
You may wanna look at Kubernetes. It’s basically docker with failover.

9 comments