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Date: Thu, 14 Nov 2013 16:41:21 +0000 (UTC)
From: "Chris Suich (JIRA)" <jira@apache.org>
To: cloudstack-issues@incubator.apache.org
Message-ID: <JIRA.12679242.1384447246259.74337.1384447281703@arcas>
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References: <JIRA.12679242.1384447246259@arcas>
Subject: [jira] [Created] (CLOUDSTACK-5172) Removing disks from VMWare VMs
 with snapshots causes problems
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Chris Suich created CLOUDSTACK-5172:
---------------------------------------

             Summary: Removing disks from VMWare VMs with snapshots causes =
problems
                 Key: CLOUDSTACK-5172
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-5172
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the defa=
ult.)
          Components: Snapshot, VMware
    Affects Versions: 4.3.0
            Reporter: Chris Suich
             Fix For: 4.3.0


We currently don=E2=80=99t allow volumes to be attached to VMs with snapsho=
ts 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 =E2=80=94 FAILS since the da=
ta disk is no longer there, although it is expected to be
5) Attempt to re-attach the volume to the VM =E2=80=94 FAILS since you cann=
ot attach volumes to VMs with snapshots
6) Attempt to delete the VM snapshot =E2=80=94 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 f=
ail on step 4, presumably because VMWare handles snapshots quite differentl=
y than Xen.

After discussion on the dev list, it sounds like the proper course of actio=
n would be to prohibit disks from being detached from VMWare VMs with snaps=
hots.


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