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.

  • Llamatron@lemmy.worldEnglish
    1·
    1 day 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.

    • SayCyberOnceMore@feddit.ukEnglish
      2·
      8 hours 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.

      • Llamatron@lemmy.worldEnglish
        1·
        3 hours 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.

    • tofuEnglish
      2·
      1 day 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.