Open Stack

Dave:

The nova account needs to be able to do passwordless (i.e., key-based) ssh
between nodes so it can copy files across nodes for migrations and resizes.

This is documented in the Xen section of the admin guide (
http://docs.openstack.org/folsom/openstack-compute/admin/content/introduction-to-xen.html),
but I'm pretty sure it applies to KVM as well, I'll file a doc bug about it.

Lorin


On Fri, Nov 30, 2012 at 1:17 PM, Dave Spano <dspano at optogenics.com> wrote:

> Has anyone come across this error when they try to resize an instance in
> Folsom?
>
>
> 2012-11-29 12:17:19 TRACE nova.openstack.common.rpc.amqp   File
> "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2827,
> in migrate_disk_and_power_off
> 2012-11-29 12:17:19 TRACE nova.openstack.common.rpc.amqp     raise e
> 2012-11-29 12:17:19 TRACE nova.openstack.common.rpc.amqp
> ProcessExecutionError: Unexpected error while running command.
> 2012-11-29 12:17:19 TRACE nova.openstack.common.rpc.amqp Command: ssh
> 192.168.1.66 mkdir -p /var/lib/nova/instances/instance-0000008e
> 2012-11-29 12:17:19 TRACE nova.openstack.common.rpc.amqp Exit code: 255
> 2012-11-29 12:17:19 TRACE nova.openstack.common.rpc.amqp Stdout: ''
> 2012-11-29 12:17:19 TRACE nova.openstack.common.rpc.amqp Stderr: 'Host key
> verification failed.\r\n'
>
>
> Block migration and a resize on the same host works, just not to another
> host. Is there a pre-requisite that I'm missing?
>
>
> Dave Spano
> Optogenics
> Systems Administrator
>
>
>
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>


-- 
Lorin Hochstein
Lead Architect - Cloud Services
Nimbis Services, Inc.
www.nimbisservices.com
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