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Add VDDK support in VMware to KVM migration by harikrishna-patnala · Pull Request #640 · apache/cloudstack-documentation · GitHub

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Add VDDK support in VMware to KVM migration - #640

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sureshanaparti merged 7 commits into
apache:4.22from
shapeblue:vddksupport
May 25, 2026
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sureshanaparti merged 7 commits into
apache:4.22from
shapeblue:vddksupport

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harikrishna-patnala commented Apr 9, 2026 •
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CloudStack supports an optimized VMware-to-KVM migration path using virt-v2v in vpx input mode combined with
VMware's Virtual Disk Development Kit (VDDK). This method eliminates the OVF export phase entirely and streams
disk blocks directly from the source hypervisor into the conversion pipeline, resulting in significantly faster
migration times.

Related PR apache/cloudstack#12970


📚 Documentation preview 📚: https://cloudstack-documentation--640.org.readthedocs.build/en/640/

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Pull request overview

Adds administrator documentation for an optimized VMware-to-KVM migration path using virt-v2v “vpx” mode with VMware VDDK, explaining prerequisites and host/agent configuration needed to enable block-streaming conversions (avoiding OVF export).

Changes:

  • Document VDDK-based streaming workflow vs. the existing OVF-based conversion flow.
  • Add KVM host preparation steps (packages, libguestfs backend, VDDK install, EL9 symlink).
  • Document relevant CloudStack agent properties for VDDK-based conversion and operational recommendations.

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| Property | Description | Default / Example |
+========================+======================================================================+=======================================================+
| ``libguestfs.backend`` | The libguestfs backend for VDDK-based conversion. | ``direct`` |
| | Must be set to ``direct`` for VDDK to work correctly. | |

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if "direct" is must for VDDK to work, should we avoid this config?

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remove this property as per the updated code.

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@harikrishna-patnala can you check this, is this property still valid?

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@blueorangutan docbuild

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@kiranchavala a Jenkins job has been kicked to build the document. I'll keep you posted as I make progress.

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QA-Doc build preview: https://qa.cloudstack.cloud/builds/docs-build/pr/640. (QA-JID 515)

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LGTM

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Add installation steps for Ubuntu 24

andrijapanicsb and others added 3 commits May 15, 2026 02:55
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

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LGTM

sureshanaparti merged commit cd7a44b into apache:4.22 May 25, 2026
1 check passed
sureshanaparti deleted the vddksupport branch May 25, 2026 12:01
github-project-automation Bot moved this from In Progress to Done in Apache CloudStack 4.22.1 May 25, 2026
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