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Re: [Xen-API] legacy vbds and new vdis

  • To: Jim Fehlig <jfehlig@xxxxxxxxxx>
  • From: Tom Wilkie <tom.wilkie@xxxxxxxxx>
  • Date: Wed, 9 May 2007 10:53:13 +0100
  • Cc: Xen-API <xen-api@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Wed, 09 May 2007 02:51:24 -0700
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  • List-id: Discussion of API issues surrounding Xen <xen-api.lists.xensource.com>

If you use the new xm which creates stuff via the XenAPI, then a vdi is created. If you look at tools/python/xen/xm/xenapi_create.py theres code that basically already does this, but in xm.

If you want to put this into xend for the old api, then I think that would be fine, but we're going to deprecate and eventually remove the old SXP based interface.

Hope this helps


On 9 May 2007, at 01:00, Jim Fehlig wrote:

While moving the cim providers forward on new Xen API functionality I
come across a problem retrieving the uname information of a vbd. If vbd
is created via Xen API, a vdi had to be created first and is
subsequently retrievable via vdi field of vbd record. However, if a vm
is 'xm newed' or 'xm created' using a traditional conf file, vdis are
not created and hence not accessible via the vdi field of vbd. So there is no way to retrieve (via Xen API) the uname of device backing the vbd.

I'm considering a patch that creates a 'default' vdi for each vbd when
vms are created outside of Xen API, but not convinced this is the proper
solution.  Suggestions before creating such a patch?


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