Latest XCP-ng 8.2: Cannot import XVA, even with latest XOA

bsodmike

Hi all,

Today I've setup a fresh install of XCP-ng 8.2 (latest) on a new Dell R740xd server. I also downloaded the latest version of XCP-ng Center 20.04.01. This is what I tried:

First I tried to import an XVA backup through XCP-ng Center. It would show a yellow VM and hang at that point.
I tried exposing an NFS share to xcpng (host) and ran xe vm-import filename=/tmp/cifsmount/xcpng_vm_backups/20200707T203024Z.xva force=true sr-uuid=d1cdbdfd-1c84-6175-40dc-184bc77297fd. As per the docs, a good import will cause that command to terminate by printing the UUID for the new VM. However, it never terminates, not even in a screen session.
Last option, I've installed XOA (latest) and tried importing the same XVA. No luck.
I have of course tried other XVA backups, nothing works.

Right now I'm testing the XOA cli tool and trying to see if this works. Can someone help please?

Thanks, Mike.

bsodmike

Not much luck here either.

root@xcpng-host0-xoa:/mnt/linux_data/xcpng_vm_backups/docker0# xo-cli vm.import sr=d1cdbdfd-1c84-6175-40dc-184bc77297fd @=20200707T203003Z.xva
✖ Internal Server Error
Error: Internal Server Error
    at onResponse (/usr/local/lib/node_modules/xo-cli/node_modules/http-request-plus/dist/index.js:230:21)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)

olivierlambert

This is clearly not a client issue, but a host issue (or a XVA problem).

Why using force with xe by the way? Let's talk with xe only which is the safest best.

When you start the import, is there a task created?
Check the usual logs (xensource.log)

bsodmike

@olivierlambert Yes, a task is created (in XOA), which never ends.

With xe vm-import it creates a VM in yellow state, but never progresses beyond that.

I just setup a fresh install of Ubuntu 20, I'll export it and try and re-import it as XVA.

olivierlambert

Is the task having any progress?

bsodmike

This post is deleted!

bsodmike

@olivierlambert Hang on there's a sliver of progress now!

bsodmike

@olivierlambert It's showing 1% but not doing much beyond that.

olivierlambert

Anything happening in xensource or SMlog?

bsodmike

@olivierlambert Nothing out of the ordinary. Still 1%.

olivierlambert

Then you have an issue on the storage or in the XVA file itself.

bsodmike

@olivierlambert it's definitely not the storage, will try a different XVA to isolate.

bsodmike

@olivierlambert Are there any compatibility issues, i.e. say exporting a XVA with an older version of XCPng and trying to import with a newer version?

olivierlambert

No known issue with XVA import. Nor any recent tickets about this kind of problem.

bsodmike

@olivierlambert Thanks your comments got me thinking, it could be the NFS mount connection is dropping out; trying a test now to mount it via fstab in XCPng.

bsodmike

@olivierlambert here's another clue. If I mount my local CIFS share onto the XCPng host, after a while I cannot do

cd /mnt
ls -la
# it just hangs here.  I have to kill the SSH session and SSH back in

This only happens after mounting the CIFS share the very first time after boot.

Thoughts?

bsodmike

@olivierlambert bit more info

[20:42 xcpng-host0 ~]# mount -t cifs
//10.0.x.x/linux_data on /mnt/linux_data type cifs (rw,relatime,vers=3.0,cache=strict,username=myuser,uid=0,forceuid,gid=0,noforcegid,addr=10.0.x.x,file_mode=0755,dir_mode=0755,soft,nounix,serverino,mapposix,noperm,rsize=1048576,wsize=1048576,echo_interval=60,actimeo=1)
[20:42 xcpng-host0 ~]# cd /mnt/linux_data
# it just hangs here.  I have to kill the SSH session and SSH back in

olivierlambert

That's your problem: fix your storage (reboot your host to see), and then import will work

bsodmike

@olivierlambert Hah, indeed it was! CIFS is totally unstable, but I was able to get NFS working with these configs:

mount -o vers=3,soft,mountproto=tcp [IP]:/share /mnt/nfs_share/backup.xva