LVM over FC sharing

[Spiros Pap]

Hi all,

I have a proxmox 5.2 setup with 3 nodes and I have an LVM volume (it resides on SAN over FC) shared between the nodes.

I brought up a VM on node1 and I successfully migrated it to node2. The problem is that now it seems that only node2 can create new VMs on the LVM. Also I can't migrate a VM from node2 to another. It says:

"TASK ERROR: can't activate LV '/dev/volgrp1-3par/vm-103-disk-1': device-mapper: create ioctl on volgrp1--3par-vm--103--disk--1LVM-m7RX9qjzLHrHIpwEJ7d7R4zdPYbJbTEep3vTlc0FdW6nXYbQdxFimtdKOUg313VO failed: Device or resource busy".

Coudl you tell me what is the problem?

Thanx,
Sp

 

[Spiros Pap]

Hi again,

It seems that I can create new VMs on other nodes. The failures are not consistent.
I also did a live migration of a running VM, while another VM can't be migrated (and it does not have any config that prevents it from migrating).

Any ideas?

Sp

 

[LnxBil]

Could you please provide an overview of your lvm?

pvs
vgs
lvs

Please use CODE tags for better formatting

 

[Spiros Pap]

Hi LnxBil,

You may find LV,VG,PV at:
http://ajax.noc.ntua.gr/~papage/lvm.txt

Basically there is one VG on the FC LUN and then there are LVs that corresnpond to a few tests I made.
Keep in mind that migration and creation of VMs works sometimes and sometimes it doesn't.
I'll need to do more tests in order to find a corellation of when it does work and when it doesn't.


Sp

 

[LnxBil]

Do you mix creating volumes by hand and by the Proxmox VE GUI or API?

 

[Spiros Pap]

Hi,

No i didn't. I just used the GUI.
1 or 2 VMs were created on node1 (the master node) before creating the cluster.

Sp