Open Stack

On Sep 30, 2013, at 1:12 AM, Daniel P. Berrange <berrange at redhat.com> wrote:

> On Fri, Sep 27, 2013 at 02:11:36PM -0400, Solly Ross wrote:
>> Hello Fellow OpenStackers,
>> 
>> I was working on a bug (https://bugzilla.redhat.com/show_bug.cgi?id=975014)
>> involving the Nova resize functionality in the libvirt driver.  So, it
>> turns out that the bug is caused by nova code trying to ssh directly
>> into another compute node.  Since it was not authorized to do so, the
>> command failed.
>> 
>> So, my question is this: should nova really be SSHing directly into a
>> peer machine to create a directory?  Doesn't that kind of defeat the
>> purpose of the centralized RPC mechanism?  However, if this is the
>> intended functionality, should Packstack be smarter about setting up
>> permissions (this was a packstack install) when there are two or more
>> compute nodes listed?
> 
> Yes, I think that it is really pretty bogus design to use ssh in this way
> in Nova & this should be fixed to not use ssh.
> 
> Daniel

Agreed. I think the simplest implementation would be to upload a temporary
snapshot to glance that can be deleted after the resize/migrate is confirmed.

Vish