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From mike-tutkowski <>
Subject [GitHub] cloudstack pull request: Taking fast and efficient volume snapshot...
Date Sat, 06 Feb 2016 17:21:11 GMT
GitHub user mike-tutkowski opened a pull request:

    Taking fast and efficient volume snapshots with XenServer (and your storage provider)

    A XenServer storage repository (SR) and virtual disk image (VDI) each have UUIDs that
are immutable.
    This poses a problem for SAN snapshots, if you intend on mounting the underlying snapshot
SR alongside the source SR (duplicate UUIDs).
    VMware has a solution for this called re-signaturing (so, in other words, the snapshot
UUIDs can be changed).
    This PR only deals with the CloudStack side of things, but it works in concert with a
new XenServer storage manager created by CloudOps (this storage manager enables re-signaturing
of XenServer SR and VDI UUIDs).
    I have written Marvin integration tests to go along with this, but cannot yet check those
into the CloudStack repo as they rely on SolidFire hardware.
    If anyone would like to see these integration tests, please let me know.

You can merge this pull request into a Git repository by running:

    $ git pull xs-snapshots

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1403
commit 34dc4d7ca9cdc66fc16301d0f8a8ffef790e7462
Author: Mike Tutkowski <>
Date:   2015-11-16T19:18:25Z

    Support for backend snapshots with XenServer

commit c0737879d7e0a5a8e991ab1f97c16db10fc79132
Author: Mike Tutkowski <>
Date:   2016-01-04T05:36:52Z

    Initial changes to make use of both SolidFire snapshots and SolidFire cloning

commit bae4c2780d30194da6149b98248e6fcd0e4faa84
Author: Mike Tutkowski <>
Date:   2015-11-02T23:58:09Z

    Refactoring and enhancements to SolidFire Integration-Testing API Plug-in

commit 8c551edca3fa7ebdc86e69fd747bb8a14d4ed178
Author: Mike Tutkowski <>
Date:   2016-01-05T08:32:39Z

    Only "permanently" make use of cloning a volume from a snapshot when creating a new CloudStack
volume from a volume snapshot

commit db3b66dfd6b172d7dd1a731abe200ef563f1439d
Author: Mike Tutkowski <>
Date:   2016-01-07T19:13:53Z

    Access-related optimization for creating a template from a snapshot

commit a0a8da3b0044d1b388a8a0aa9e8f492b067eb807
Author: Mike Tutkowski <>
Date:   2016-01-07T19:16:48Z

    Correction to used-space calculation

commit 054f110d47543c966a83cf797fea9a0d2046e6af
Author: Mike Tutkowski <>
Date:   2016-01-08T01:27:48Z

    Do not check for remaining volume snapshots before deleting a volume snapshot that is
supported by a back-end volume (only do this when deleting a volume snapshot that is supported
by a back-end snapshot)

commit d8cf010117f664854c82b68a2d4a0d9b4b1e7c25
Author: Mike Tutkowski <>
Date:   2016-01-08T02:27:57Z

    When deleting a CloudStack volume that is tied to a SolidFire volume, only delete the
SolidFire volume if the CloudStack volume's volume snapshots (if any) are all supported by
SolidFire volumes (as opposed to any being supported by SolidFire snapshots)

commit 8655fb1aa3a1cc6ee5443607836a74b103814b02
Author: Mike Tutkowski <>
Date:   2016-01-08T20:22:43Z

    "=" should be "=="

commit 836c9a5b8ae6b2b8175166ba1418b9f59314cb4b
Author: Mike Tutkowski <>
Date:   2016-01-13T19:26:25Z

    For integration-test purposes: Get snapshot details

commit 9528ea8d23ac41b7f5d9735ec29572781ee16e27
Author: Mike Tutkowski <>
Date:   2016-01-20T02:07:42Z

    Enabling support for arbitrary key/value pairs to more easily be stored for SolidFire

commit acf15ed6af5ff7090b2b71bef9f70a72f87cab48
Author: Mike Tutkowski <>
Date:   2016-01-20T22:57:32Z

    Enable the use of arbitrary key/value pairs when creating a SolidFire volume via cloning
and when creating a SolidFire snapshot

commit 1c9516ab27923caa845bf99a3a2eab406a9d7a6f
Author: Mike Tutkowski <>
Date:   2016-01-20T23:57:12Z

    Improved exception handling

commit 7625e188d264633beaf30b1ca04779c1890d02f6
Author: Mike Tutkowski <>
Date:   2016-01-22T18:43:18Z

    The way resigning metadata is invoked has changed. Call SR.create with type RELVMOISCSI.
An exception should be thrown when the time would otherwise have come for the create functionality
to attach the SR. Check if "success" is returned. If so, invoke SR.introduce; else, re-throw
the exception.

commit a0fdf10246aa0a6f123b8583862322d30ecf0f38
Author: Mike Tutkowski <>
Date:   2016-01-29T19:32:26Z

    Check if hostVO == null (not if hostId == null)

commit e851a40caf1392afc27a6583b7e1786cdf579af1
Author: Mike Tutkowski <>
Date:   2016-02-04T23:19:57Z

    If the volume snapshot is backed by a SolidFire snapshot (as opposed to a SolidFire volume),
then add it to the list.

commit 454f005ea3701b3ae47b8e0584eab658a331c5c0
Author: Mike Tutkowski <>
Date:   2016-02-06T03:58:52Z

    Correcting an issue with a rebase


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