[one-users] Opennebula migration error

[Vlad Mirel]

Hello!

I have installed Latest Series 4 Stable of OpenNebula. 
I have 2 worker nodes and 1 front-end. On both the worker nodes I can deploy virtual machines.
The problem occurs when I try to migrate one virtual machine from one of the worker nodes to the other one. I am trying to create a cold migration and I am not using a shared data storage, as I am counting on scp .

So, for example I try to do this operation: Migrate from host A to host B.

Here are the logs containing the error:

Thu Jan  9 17:43:04 2014 [LCM][I]: New VM state is SAVE_MIGRATE
Thu Jan  9 17:43:10 2014 [VMM][I]: ExitCode: 0
Thu Jan  9 17:43:10 2014 [VMM][I]: Successfully execute virtualization driver operation: save.
Thu Jan  9 17:43:10 2014 [VMM][I]: ExitCode: 0
Thu Jan  9 17:43:10 2014 [VMM][I]: Successfully execute network driver operation: clean.
Thu Jan  9 17:43:11 2014 [LCM][I]: New VM state is PROLOG_MIGRATE
Thu Jan  9 17:43:11 2014 [LCM][I]: New VM state is BOOT
Thu Jan  9 17:43:12 2014 [VMM][I]: ExitCode: 0
Thu Jan  9 17:43:12 2014 [VMM][I]: Successfully execute network driver operation: pre.
Thu
 Jan  9 17:43:12 2014 [VMM][I]: Command execution fail: 
/var/tmp/one/vmm/kvm/restore '/var/lib/one/datastores/0/230/checkpoint' 
'192.168.1.100' 230 192.168.1.100
Thu Jan 
 9 17:43:12 2014 [VMM][E]: restore: Command "virsh --connect 
qemu:///system restore /var/lib/one/datastores/0/230/checkpoint" failed:
 error: Failed to restore domain from 
/var/lib/one/datastores/0/230/checkpoint
Thu Jan  9 17:43:12 
2014 [VMM][I]: error: Failed to create file 
'/var/lib/one/datastores/0/230/checkpoint': No such file or directory
Thu Jan  9 17:43:12 2014 [VMM][E]: Could not restore from /var/lib/one/datastores/0/230/checkpoint
Thu Jan  9 17:43:12 2014 [VMM][I]: ExitCode: 1
Thu Jan  9 17:43:12 2014 [VMM][I]: Failed to execute virtualization driver operation: restore.
Thu Jan  9 17:43:12 2014 [VMM][E]: Error restoring VM: Could not restore from /var/lib/one/datastores/0/230/checkpoint
Thu Jan  9 17:43:12 2014 [DiM][I]: New VM state is FAILED

This instruction, if ran on host A, where the checkpoint exists gives the following output:

Last login: Thu Jan  9 15:51:59 2014 from utcn.local
$ 
$ virsh --connect qemu:///system restore /var/lib/one/datastores/0/228/checkpoint
Domain restored from /var/lib/one/datastores/0/228/checkpoint

When ran on host B I get the following output:

Last login: Thu Jan  9 15:26:11 2014 from utcn.local
$ virsh --connect qemu:///system restore /var/lib/one/datastores/0/228/checkpoint
error: Failed to restore domain from /var/lib/one/datastores/0/228/checkpoint
error: Failed to create file '/var/lib/one/datastores/0/228/checkpoint': No such file or directory

---------> this errors are identical with those from SUNSTONE

In my opinion, a POSSIBLE CAUSE might be the followin:
-the checkpoint is not copied to the host B => no such file or directory


I would appreciate any help!
 		 	   		  
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