Migrating RHEL from VMWare - disks not showing up

rporter

I'm testing XCP-ng/XOA as a possible replacement for vmware, and have run into an issue with the online migration.

Because of a prior issue, I have created an NFS datastore and successfully migrated a few Windows machines. Any machine that I'm trying to migrate, I first vmotion to the NFS datastore. We're running VSphere 7.0u3, with hosts running ESXi 7.0u3 as well

Now I'm testing with a few RHEL machines. They are on VM hardware version 11 and running RHEL 7 or 8.

After migration, the VMs disks don't show up and it boots into emergency mode. There are no sda, sdb, etc items in the /dev directory

The source was using a vmware Paravirtual driver, which I thought was the problem, but the issue continues even after switching it to an LSI Logic SAS controller

The import task succeeds and the disks are there and connected to the VM, the OS just doesn't seem to be able to see it.

Any suggestions, or am I stuck with exporting to OVF, converting the OVF to OVA, and importing on the Xen side?

olivierlambert

Hi,

Have you read this part? https://docs.xcp-ng.org/installation/migrate-to-xcp-ng/#ova

It's likely your RHEL doesn't have the Xen PV drivers in the kernel. Just follow the instructions there and it should work

imaginapix

@rporter

Are there really no disks or just not under the expected name /dev/sd....

You might check if there are /dev/xvd.... devices. This change can happen because XCP-NG and VMware handle the "hardware" differently. Had the same problem with some VMs and it also changed

This effect also can change the network interface name, so you might check that too.

rporter

@olivierlambert

That did it

Tested with both the LSI and Paravirtual - both succeeded

Thanks