ohlaph6d ago

What device are you guys hosting on?

https://lemmy.world/post/45095751

What device are you guys hosting on? - Lemmy.World

I’m thinking about getting started using Docker and an older Raspberry Pi. I’m already hosting a grafana service on it, so It can’t be fully dedicated to ha. So curious what everyone is using.

Show threadLlamatron6d ago
Up until a couple of weeks I was running it on a dedicated Pi4. It’s now running as a VM in ProxMox on a Lenovo M710q I got off ebay for £40. I did load it up with RAM, upgrade the CPU and add another NIC so it probably came in at more like the cost of a 16Gb Pi5 but I’m super happy with it.
Show threadSayCyberOnceMore

It’s now running as a VM in ProxMox on a pair of Lenovo M710q mini PCs

So, have you got High Availability setup? If so, I’d like to know more about that part…

Apr 3 at 6:54amWeb
Show threadLlamatron6d ago

So my plan had been to set up a pair of ProxMox hosts, use Ceph to do the shared storage and use HA so VMs could magically move around if a host died. However, I discovered Ceph and HA need a minimum of 3 hosts. HA can be done if you set up a Pi or some other 3rd host that can act as the 3rd vote in the event of a failure but as I didn’t have Ceph I’ve not bothered trying.

I’ve read Ceph can work on 2 but not well or reliably.

I might setup a 3rd host some day but it seems a bit of a waste as I just don’t need that amount of resources for what I’m running.

And I should have known really, I’ve a bit of a background in VMware, albeit at the enterprise level so I’ve never had to even think about 2 or 3 node clusters.

Show threadtofu6d ago
You can do HA in Proxmox with ZFS replication instead of Ceph. Third device something else as you said. It’s what I’m doing.
Show threadLlamatron6d ago
Thanks, I’ll look into it.
Show threadLlamatron4d ago

You don’t happen to know of a guide on how to set this up? All I’ve found so far has told me that ZFS isn’t meant to mirror over network.

Or do you mean how you can enable replication on a VM?

Show threadtofu4d ago
You can enable replication, and once you have the VM disk replicated, you can enable High Availability. Open the VM in the webinterface, click “More” at bottom right, and select “Manage HA”.
Show threadSayCyberOnceMore5d ago

Ah, ok.

Yep, I’m in a similar situation… I have a few VMs, but not enough for lots of failover infrastructure… (redundant switches, etc)

I was thinking you might be just cloning 1 device to the other or something.

Show threadLlamatron5d ago
Oh I have a pair of D-Link switches (again off ebay) that are stacked together. My router, NAS and both ProxMox hosts have LACP connections to both. And my home WiFi is a couple Aruba IAPs, one on each switch. So if I lose a switch then most things will keep running.
Show threadGreatAlbatross2d ago
I hit this stumbling block.
And I don’t quite want to go the whole hog/headache of HA.
My solution was to run warm-spare: Once a week the VM can be synced to the second box, but never powered on.
And HA backups are pretty good anyway, it doesn’t take long to bring it back.