We should dis-allow detaching volume from VM when it has VM snapshots. VMware keeps VM snapshot meta information at VM basis, disk membership change behind its back will cause problem and it does not provide official API to manipulate at volume level for a VM snapshot.
This is a bug Kelven On 11/6/13, 5:58 AM, "SuichII, Christopher" <chris.su...@netapp.com> wrote: >Bumping this. I believe we need the imput of a VMWare expert, please. > >-Chris >-- >Chris Suich >chris.su...@netapp.com >NetApp Software Engineer >Data Center Platforms Cloud Solutions >Citrix, Cisco & Red Hat > >On Nov 5, 2013, at 1:46 PM, Mike Tutkowski <mike.tutkow...@solidfire.com> >wrote: > >> OK, well, depending on if we can or can't get a VMware person to chime >>in >> on this issue, we may have to disallow disks from being detached from >> VMware VMs with snapshots in 4.3. >> >> >> On Tue, Nov 5, 2013 at 11:44 AM, SuichII, Christopher < >> chris.su...@netapp.com> wrote: >> >>> Correct. >>> >>> #6 FAILS with VMWare and SUCCEEDS with Xen >>> >>> -- >>> Chris Suich >>> chris.su...@netapp.com >>> NetApp Software Engineer >>> Data Center Platforms Cloud Solutions >>> Citrix, Cisco & Red Hat >>> >>> On Nov 5, 2013, at 1:35 PM, Mike Tutkowski >>><mike.tutkow...@solidfire.com> >>> wrote: >>> >>>> I assume 6 fails with VMware, as well? >>>> >>>> Is Xen OK with 6? >>>> >>>> >>>> On Tue, Nov 5, 2013 at 11:26 AM, SuichII, Christopher < >>>> chris.su...@netapp.com> wrote: >>>> >>>>> FWIW, after looking into this more with Xen, when the VM is restored >>>>>in >>>>> step 4, it simply no longer has the volume attached, so this appears >>>>>to >>>>> really be a VMWare issue. Any VMWare experts out there know how we >>>>>can >>>>> handle this? >>>>> >>>>> -Chris >>>>> -- >>>>> Chris Suich >>>>> chris.su...@netapp.com >>>>> NetApp Software Engineer >>>>> Data Center Platforms Cloud Solutions >>>>> Citrix, Cisco & Red Hat >>>>> >>>>> On Nov 5, 2013, at 1:05 PM, SuichII, Christopher < >>> chris.su...@netapp.com> >>>>> wrote: >>>>> >>>>>> We currently don¹t allow volumes to be attached to VMs with >>>>>>snapshots >>>>> and allowing volumes to be detached causes quite a bug: >>>>>> >>>>>> 1) Attach a data disk to a VM >>>>>> 2) Snapshot the VM >>>>>> 3) Detach the data disk >>>>>> 4) Attempt to restore the VM from the snapshot ‹ FAILS since the >>>>>>data >>>>> disk is no longer there, although it is expected to be >>>>>> 5) Attempt to re-attach the volume to the VM ‹ FAILS since you >>>>>>cannot >>>>> attach volumes to VMs with snapshots >>>>>> 6) Attempt to delete the VM snapshot ‹ FAILS since the data disk is >>>>>>no >>>>> longer there, although it is expected to be >>>>>> >>>>>> I have verified the above steps on VMWare, however Xen does not >>>>>>appear >>>>> to fail on step 4, presumably because VMWare handles snapshots quite >>>>> differently than Xen. >>>>>> >>>>>> Does anyone else have any thoughts on whether this is a bug or not? >>> IMO, >>>>> on VMWare, this set of steps can get users into a state where they >>>>>can >>> no >>>>> longer attach new data disks to their VM, so it appears to be a bug >>>>>of >>> some >>>>> kind. >>>>>> >>>>>> -Chris >>>>>> -- >>>>>> Chris Suich >>>>>> chris.su...@netapp.com >>>>>> NetApp Software Engineer >>>>>> Data Center Platforms Cloud Solutions >>>>>> Citrix, Cisco & Red Hat >>>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> *Mike Tutkowski* >>>> *Senior CloudStack Developer, SolidFire Inc.* >>>> e: mike.tutkow...@solidfire.com >>>> o: 303.746.7302 >>>> Advancing the way the world uses the >>>> cloud<http://solidfire.com/solution/overview/?video=play> >>>> *�* >>> >>> >> >> >> -- >> *Mike Tutkowski* >> *Senior CloudStack Developer, SolidFire Inc.* >> e: mike.tutkow...@solidfire.com >> o: 303.746.7302 >> Advancing the way the world uses the >> cloud<http://solidfire.com/solution/overview/?video=play> >> *�* >
