VMware migration tool: we need your feedback!

neologic

To be able to start with dynamic memory at 4GB (min max) for the Windows Guest.
And then if needed, to be able, to expand to 8GB (min max) on the fly.
However, it seems, that the Windows Guest (2022 Server) always sees static max correct?

olivierlambert

Do you really need dynamic memory? I would prefer to avoid it if you can. Each migration will deflate the VM to the dynamic min, which is a cause of a lot of crashes and migration issues (if not taken into account, eg dynamic too low vs current usage). Keep it with static as far as possible.

neologic

Ok. Thank you for the advise.
Will follow as recommended.
Best regards

Riven

Any plans to check how many vNICs there are and allow us to map each one correctly.

All of our vmware VMs have multiple vNICs and are in different port-groups.

Its not a major hassle to change them post-migration - just a nice-to-have.

olivierlambert

You mean to map each VIF to each Network of your choice?

Riven

@olivierlambert - Yes, so when we do a V2V there is only 1 VIF listed to put the migrated VIFs in to, even if the VM has 5 VIFs

Is it possible to query each vmx and allow us to select a 'network' for each VIF that it has?

olivierlambert

Question for @florent

florent

@Riven said in VMware migration tool: we need your feedback!:

@olivierlambert - Yes, so when we do a V2V there is only 1 VIF listed to put the migrated VIFs in to, even if the VM has 5 VIFs

Is it possible to query each vmx and allow us to select a 'network' for each VIF that it has?

not for now

rtjdamen

@olivierlambert I wanted to comment on this topic, we have migrated around 450 vms in 3 months using this feature, it really was a game changer and without it we were never able to make the step to XCP-NG. during the migration process we saw the feature being improved, overall speed and reliability were great. Compliments on this feature and i think it will help a lot of future customers migrating to XCP-NG.

tcp_len

Migration fails, here is the raw log;

{
  "id": "0lxdi3kqv",
  "properties": {
    "name": "importing vms 14",
    "userId": "9045a9e7-f9b2-44fd-81e9-02c1ea88b37b",
    "total": 1,
    "done": 0,
    "progress": 0
  },
  "start": 1718297723335,
  "status": "interrupted",
  "updatedAt": 1718298405138,
  "tasks": [
    {
      "id": "c3bsox2ydxp",
      "properties": {
        "name": "importing vm 14"
      },
      "start": 1718297723339,
      "status": "pending",
      "tasks": [
        {
          "id": "lvtzb0k3sc9",
          "properties": {
            "name": "connecting to 10.x.x.12"
          },
          "start": 1718297723341,
          "status": "success",
          "end": 1718297723756,
          "result": {
            "_events": {},
            "_eventsCount": 0
          }
        },
        {
          "id": "n6tsha4ebu",
          "properties": {
            "name": "get metadata of 14"
          },
          "start": 1718297723756,
          "status": "pending"
        }
      ]
    }
  ]
}

Danp

@tcp_len We recently released a Vmware migration checklist that you can view here -- https://help.vates.tech/kb/en-us/37/133

Frankly, that log doesn't give us much to go on so you will need to provide more details if you want further assistance, ie:

ESXi version
Type of datastore
Version of XOA or current commit if using XO from sources
XCP host version; fully patched?
Warm or cold migration?
Does the VM have any snapshots?
etc

tcp_len

@Danp

ESXI version 6.5
Data Store - VMFS5
XOA
XCP - Welcome To XCP-Ng 8.2.1
Cold Migraration
No Snapshots

From the checklist posted, I should uninstall the Vmware tools before I attempt migration as well as run #yum update on the XCP host.

andyh

Could anyone explain what we should be setting for 'Original Template' in the Import VM screen ?

Selecting a template appears to create a new empty VM with no apparent attempt to perform the migration.

Using Xen Orchestra from Sources (commit 636c8) against an ESXi 5.1 host, via an nginx reverse proxy (to work around legacy ciphers).

Danp

@andyh This is intended for you to select the template that best represents the source VM. If you are migrating a Debian VM, then pick the Debian option that best matches the source VM.

I'm unsure about compatibility with an ESXi version that one. Do you get any error messages or have you checked the XO logs?

andyh

@Danp No error messages and nothing in either Settings - Logs or via the CLI (journalctl)

It could be due to the age of the ESXi host or the fact I am using a reverse SSL proxy to cope with the legacy ciphers.

I'll look to export the VMs as OVA's and import that way.

probain

The address field doesn't trim trailing whitespace. Not a big deal breaker. But it did take me a couple of minutes until I found out why my copy/paste address was giving me errors

andyh

@danp
I was having a similar issue with OVA imports (using Chrome), tried a different browser (Firefox) and was able to import the OVA.

Went back to the reverse proxy and tried in Firefox, I currently have two VMs importing directly from VMware

katapaltes

Greetings. Don't know if Vates is still monitoring this thread, but I've noticed an interesting edge case with the Migration tool where imports fail: When "Native Snapshots" are enabled. (Forgive me if this has been discussed above.)

We are investigating moving our Citrix servers from vSphere 8.0/ESXi 7.0 to XO/XCP-NG 8.3, and both products work very well with Citrix. In our current VMware environment, we take advantage of the VMware VAAI API which provides instant clones and "Native NetApp Snapshots," both of which are pretty awesome. (That is one thing I'll truly miss in any transition from VMware to XCP-NG.) I noticed that when Native Snapshots are enabled on a VM (by installing a NetApp-supplied .VIB on the ESXi hosts, setting some variables on the NetApp, and setting snapshot.alwaysAllowNative=TRUE on the VMs) the import from VMware to XCP-NG fails. When I disable Native Snapshots, the import succeeds.

Note: By "succeeds," I mean that the entire import process runs and the VM appears in XO/XCP-NG Center. By "fail," I mean that the process runs and no VM appears in XO/XCP-NG and the disk images that were being created in the target Storage Repository simply disappear. We're running XO d7e64 at the moment.

florent

@katapaltes hi, I do think we didnt handle this case.
To be fair, the sheer breadth of the capabilities of vmware is always impressive

Would you be able to show us the VM metadata (especially the .vmx and .vmsd ) to see how we can detect them ? We'll probably won't be able to read this snapshot data for now, so we'll have to at least document a reliable process

On the fast clone side : did you try the checkbox on the bottom (fast clone) ? It should be pretty fast since no data are copied.
On the native snapshot side : I now it's on our roadmap, bu can't give you ETA

katapaltes

@florent Hi there, and thank you for your reply. I did a file compare of the .VMX and .VMSD files and found only one difference between when the VM was configured for Native Snapshots and not configured for Native Snapshots. Note that snapshot.alwaysAllowNative = "FALSE" is the default afaik, so a .VMX file without this line in it has Native Snapshots disabled.

C:\Downloads>fc stem2p19_files-snap-false\stem2p19.vmx stem2p19_files-snap-true\stem2p19.vmx
Comparing files STEM2P19_FILES-SNAP-FALSE\stem2p19.vmx and STEM2P19_FILES-SNAP-TRUE\STEM2P19.VMX
***** STEM2P19_FILES-SNAP-FALSE\stem2p19.vmx
usb_xhci:4.parent = "-1"
snapshot.alwaysAllowNative = "FALSE"
***** STEM2P19_FILES-SNAP-TRUE\STEM2P19.VMX
usb_xhci:4.parent = "-1"
snapshot.alwaysAllowNative = "TRUE"

C:\Downloads>fc stem2p19_files-snap-false\stem2p19.vmsd stem2p19_files-snap-true\stem2p19.vmsd
Comparing files STEM2P19_FILES-SNAP-FALSE\stem2p19.vmsd and STEM2P19_FILES-SNAP-TRUE\STEM2P19.VMSD
FC: no differences encountered

I tested several scenarios for fun:

Windows VM with Native Snapshots enabled:
With VM powered down and no snapshot taken, can I still import it successfully?
Yes.
What about powered down and with a (native) snapshot taken?
Yes, with or without "Stop the Source VM" enabled.
What about with VM powered on, snapshot taken, and Stop the Source VM enabled, can I import VM successfully?
No, at the end of the import, both imported disks and the imported VM disappear.
What about with VM powered on, native snapshot enabled, no snapshot taken, and Stop the Source VM enabled, can I import VM successfully?
Yes.

Windows VM with Native Snapshots not enabled (just one single test scenario):
What about with VM powered on, snapshot taken, and Stop the Source VM enabled, can I import VM successfully?
Yes

So the problem seems to be when the VM is powered on and there's a native snapshot present.

The warm migration capability is very cool. I likely won't use it because a reboot would be required to remove VMware Tools anyway. Also, my VMs are not huge and should migrate fast.

I see what you mean by Fast Clone. That is very fast.. I'll try to get that to work with Citrix MCS. I think it may only be useful for our single-sessions hosts, not our RDSH-type hosts, but that would still be helpful.

One last thing: NetApp offers a very good ONTAP simulator for free. Now that ESXi is also free once again (LOL), you may be able to test the above scenario on your end if you like.

Please let me know if you have any questions. Cheers!