Multiple VM on thin lvm pool

[GiovanniP]

Hello all,
I exported a SAN volume to 2 different hosts and I have create a thin pool on this volumne.
After that I have created a virtual Machine; during the windows installation, I tried to create another VM on the same thin pool but the proxmox anwers with this error message:


Task viewer: VM 106 - Create

OutputStatus

Stop
Using default stripesize 64.00 KiB.
device-mapper: create ioctl on LVM--VG01-dataLVM-T6Pm6LkKFhD0vtIzB2388ieL0sC5Y94KNCv5hFRHqy0r5U4aYLGf9RDcQzyR5PCh-pool failed: Device or resource busy
TASK ERROR: create failed - lvcreate 'LVM-VG01/vm-106-disk-1' error: Aborting. Failed to locally activate thin pool LVM-VG01/data.


Is there a way to create and manage 2+ Virtual Machine on a same LV thin pool?
On rhev I have seen that this is possibile using Storage Pool Manager; is there a similar service on proxmox?

Thx
Giovanni

----------------------------------
# pveversion -v
proxmox-ve: 5.1-32 (running kernel: 4.13.13-2-pve)
pve-manager: 5.1-41 (running version: 5.1-41/0b958203)
pve-kernel-4.13.13-2-pve: 4.13.13-32
libpve-http-server-perl: 2.0-8
lvm2: 2.02.168-pve6
corosync: 2.4.2-pve3
libqb0: 1.0.1-1
pve-cluster: 5.0-19
qemu-server: 5.0-18
pve-firmware: 2.0-3
libpve-common-perl: 5.0-25
libpve-guest-common-perl: 2.0-14
libpve-access-control: 5.0-7
libpve-storage-perl: 5.0-17
pve-libspice-server1: 0.12.8-3
vncterm: 1.5-3
pve-docs: 5.1-12
pve-qemu-kvm: 2.9.1-5
pve-container: 2.0-18
pve-firewall: 3.0-5
pve-ha-manager: 2.0-4
ksm-control-daemon: 1.2-2
glusterfs-client: 3.8.8-1
lxc-pve: 2.1.1-2
lxcfs: 2.0.8-1
criu: 2.11.1-1~bpo90
novnc-pve: 0.6-4
smartmontools: 6.5+svn4324-1
zfsutils-linux: 0.7.3-pve1~bpo9
openvswitch-switch: 2.6.2~pre+git20161223-3

 

[dcsapak]

I exported a SAN volume to 2 different hosts and I have create a thin pool on this volumne.

you cannot use lvm thin on a shared block device, this will not work please use plain lvm (not thin)

 

[GiovanniP]

Hi, thank you for the answer.
Ok I'll use plain LVM.
some questions:

1. plain LVM can't make snapshot, right?
2. can multiple VM on multiple host "survive" on the same VG ? Do I need some extra configuration?

Thank you
Gio

 

[LnxBil]

1. plain LVM can't make snapshot, right?

Unfortunately, no.

2. can multiple VM on multiple host "survive" on the same VG ? Do I need some extra configuration?

If you create the volumes with PVE, everything is fine.