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Fix virtio-win install steps for EL hosts - #657
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andrijapanicsb
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May 26, 2026
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Pls make sure this is reviewed and merged for 4.22.x - since "yum install virtio-win" will not work at all. |
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41be3baCompareClarify installation instructions for virt-v2v and virtio drivers, including logging and error handling for Windows VMs.
Updated the instructions for importing VMware VMs into KVM, including recommendations for virt-v2v versions and installation steps for required tools.
andrijapanicsb
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May 27, 2026
ContributorAuthor
@sureshanaparti please make sure this is merged as part of the official release docs, since some instructions were wrong (virtio-win installation on EL hosts). And there is also a clarification on the needed VDDK library versions, for stability etc (everything tested last few days by me) |
… 2025 smbus driver issue The Enterprise Linux distribution virtio-win packages can be old enough to contain no drivers for recent Windows releases, in which case virt-v2v converts the guest without a virtio storage driver and the imported VM cannot boot. Document overwriting the ISO with the latest upstream build, and document the Windows Server 2025 first-boot reboot loop caused by the rejected smbus driver signature, with its workaround.
… ISO The previous note said to remove the driver from the driver set without explaining that virt-v2v reads it from the ISO itself, which cannot be edited in place. Document the full extract, delete and rebuild sequence with xorriso; verified on an EL9 conversion host against virtio-win 0.1.285.
… on auto-detection Auto-detection of the VDDK directory can pick up the wrong libraries on real hosts - leftovers from container images, a second VDDK installation, or a partially extracted tree - and the resulting conversion failures are hard to trace to the wrong library path. The text presented the property as an option for non-standard locations; it is now the recommended default, with auto-detection described as a fallback only. This also completes a sentence that was previously cut off mid-reference.
…and newer only Older Windows releases accept the driver's signature and work with the unmodified upstream ISO; make that explicit so operators do not rebuild the ISO unnecessarily.
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andrijapanicsb
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Aug 6, 2026
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@codex please review, because it seems nobody gives a...damn about actually help users with proper docs.... this is all filed-tested/sourced data (most of it) |
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Summary
yum install virtio-winguidance with direct installation of the Fedora-providedvirtio-win.noarch.rpm./usr/share/virtio-winis the virt-v2v driver search path and simplify the Debian RPM conversion workaround.smbusdriver signature (virtio-win 0.1.285) and its workaround (remove the non-essentialsmbus.inf/smbus.catfrom the driver set before conversion).Related to #640.
📚 Documentation preview 📚: https://cloudstack-documentation--657.org.readthedocs.build/en/657/