HA migration issue with Linux VMs on Proxmox 9.0.10 (FC LVM datastore)

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el_vagokz

New Member
Sep 25, 2025
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Hello,


We are testing Proxmox 9.0.10 and faced the following issue:


  • Datastore for VMs: FC-based LVM
  • All VMs have QEMU guest agents installed (Linux and Windows)
  • HA is enabled across the cluster

Behavior:


  • When a node is powered off, all VMs (Linux and Windows) migrate successfully to the remaining nodes.
  • However, when the FC connection is lost on a node:
    • Windows VMs migrate to other nodes as expected
    • Linux VMs do not migrate and show I/O errors in the console

Question:
Is it possible to configure Proxmox so that Linux VMs also migrate automatically when the node loses access to the FC datastore?


Thanks in advance for any advice.
 
Hi @el_vagokz , welcome to the forum.

There is no special sauce in PVE to enable automatic HA migration of VM nodes when storage connectivity is lost. Have you looked at the Windows logs during the failure window? Is it possible Windows shuts down (powers off), which causes the HA system to pick it up elsewhere?

There should be information in hypervisor log about HA events, what initiated them, etc. I'd recommend looking at that sequence - it may be helpful.

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox
 
LnxBil said:
PVE is not able to mitigate a storage failure and migrate the VMs, storage HA has to be provided by the storage layer.
Click to expand...
I can only see this happen if the VM is powered off, then PVE HA will try to start it, potentially detect storage outage (as you correctly noted there seems to be no redundancy there), and then start it on another host.

Linux Kernel will try IO indefinitely and the VM is not shutdown by any "smart" process.

I could be missing something, of course. Op's analyses of VM and hypervisor logs should bring more clarity here.
Obviously, having redundancy for FC is proper way to address this situation.

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox
 
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