migrate vm fails iscsi + lvm, 2 nodes, 1 nas

[nate]

I set up iscsi storage and LVM using "LVM Groups with Network Backing" as described here: http://pve.proxmox.com/wiki/Storage_Model


Then I installed a new vm (ubuntu 12.04) just to test a migration on the LVM , named it LVM1. VM runs fine on cluster 1. If I stop it and try to migrate it to cluster 2. It dies.

I get this error:

Found duplicate PV YaTBH5YDXgmAg281xpeFPcBJHEBUfuDm: using /dev/sdc not /dev/sdb
Found duplicate PV YaTBH5YDXgmAg281xpeFPcBJHEBUfuDm: using /dev/sdc not /dev/sdb
May 18 17:25:05 starting migration of VM 131 to node 'cloud2' (10.15.223.138)
May 18 17:25:05 copying disk images
May 18 17:25:08 ERROR: Failed to sync data - mount error: mount.nfs: No route to host
May 18 17:25:08 aborting phase 1 - cleanup resources
May 18 17:25:08 ERROR: migration aborted (duration 00:00:03): Failed to sync data - mount error: mount.nfs: No route to host TASK ERROR: migration aborted


I'm not sure what I am doing wrong?

 

[udo]

I set up iscsi storage and LVM using "LVM Groups with Network Backing" as described here: http://pve.proxmox.com/wiki/Storage_Model


Then I installed a new vm (ubuntu 12.04) just to test a migration on the LVM , named it LVM1. VM runs fine on cluster 1. If I stop it and try to migrate it to cluster 2. It dies.

I get this error:

Found duplicate PV YaTBH5YDXgmAg281xpeFPcBJHEBUfuDm: using /dev/sdc not /dev/sdb
Found duplicate PV YaTBH5YDXgmAg281xpeFPcBJHEBUfuDm: using /dev/sdc not /dev/sdb
May 18 17:25:05 starting migration of VM 131 to node 'cloud2' (10.15.223.138)
May 18 17:25:05 copying disk images
May 18 17:25:08 ERROR: Failed to sync data - mount error: mount.nfs: No route to host
May 18 17:25:08 aborting phase 1 - cleanup resources
May 18 17:25:08 ERROR: migration aborted (duration 00:00:03): Failed to sync data - mount error: mount.nfs: No route to host TASK ERROR: migration aborted


I'm not sure what I am doing wrong?

Hi,
there are two things:
first the doubled PVs - it seems that your host see the iSCSI-Disk twice (multipath) and don't know which is the right disk. Solution: use only one path or install and configure multipath (for the beginning it's easier to use only one path and if all run's well, switch to multipath).

second: the vm is an kvm, or an container? Normaly on a kvm-vm your iscsi-lvm-storage must defined as shared (because all nodes can use the storage together). And in this case the disk-content don't be copied, because the other node can use the vm-disk(s) allready.

Udo