[SOLVED] Migration, LVM, Resize disk, DRBD

[cfuchs]

Hi,

I don't get it. First I installed a two node cluster according to https://pve.proxmox.com/wiki/DRBD9, but I cannot resize the disk of a VM ("... not implemented ..."), migration works well. So I decided to change the setup according to https://pve.proxmox.com/wiki/DRBD . Now I can resize the disk but cannot migrate the VM to the other node ("... storage lvm not supported ..."). As I far as I can remember this was possible in PVE 3.4.

Another issue in the first installation was, that in the Datacenter GUI the DRBD space was shown with 4 TB space but 2 TB used and 2 TB free. That was not right, because I only have a 2 TB disk setup.

Thank for any help.

Regards,

Christian

--
Here are the packet versions:
proxmox-ve: 4.1-28 (running kernel: 4.2.6-1-pve)
pve-manager: 4.1-2 (running version: 4.1-2/78c5f4a2)
pve-kernel-4.2.6-1-pve: 4.2.6-28
lvm2: 2.02.116-pve2
corosync-pve: 2.3.5-2
libqb0: 0.17.2-1
pve-cluster: 4.0-29
qemu-server: 4.0-42
pve-firmware: 1.1-7
libpve-common-perl: 4.0-42
libpve-access-control: 4.0-10
libpve-storage-perl: 4.0-38
pve-libspice-server1: 0.12.5-2
vncterm: 1.2-1
pve-qemu-kvm: 2.4-18
pve-container: 1.0-35
pve-firewall: 2.0-14
pve-ha-manager: 1.0-16
ksm-control-daemon: 1.2-1
glusterfs-client: 3.5.2-2+deb8u1
lxc-pve: 1.1.5-5
lxcfs: 0.13-pve2
cgmanager: 0.39-pve1
criu: 1.6.0-1
zfsutils: 0.6.5-pve6~jessie

And here are the hardware specs:
2 x Dell PowerEdge T710, 128 GB RAM, 2 x 600 GB SAS (RAID 1, PVE), 6 x 600 GB SAS (RAID 6, DRBD), 10 Gbit NIC for DRBD

 

[cfuchs]

I've found a solution I can live with.
Example:
On both nodes
lvresize -L +2G /dev/drbdpool/vm-100-disk-1_00

Adjust size of disk in /var/lib/drbd.d/drbdmanage_vm-100-disk-1.res

Power up VM
On primary node
drbdadm resize vm-100-disk-1 -v
drbdadm adjust vm-100-disk-1

Shutdown VM, not only restart
Start VM
Resize disk (e. g. with gparted)

 

[JD Tissot]

Hi,
Well, you mark it SOLVED, but in my Proxmox web management console my VM disk have the same size before. I grow the disk from 4G to 7G. I follow your procedure (which is perfect, but Proxmox management console MUST do that), but my disk is shown with a 4G size in Web management tool.