How to import an ISCSI LUN from a TrueNAS Snapshot in xcp-ng

Computer Hardware & Server Infrastructure Builds
1

Hi

I have:

3x XCP-NG host in the same pool

they are connect to a Truenas with ISCSI and Multipath is activ on all of the server.

I have create a new zvol from a snapshot of my iscsi zvol.

when I want to connect the LUN to my xcp-ng I keep getting an error:
“DMP failed to activate mapper path”

Just want to restore a vm from a snapshot.

I tried to connect the target to another xcp-ng, there I can’t add the target without formating the volume.

anyone an idea?

Thnaks

2

I have never tried to do it that way, try their forums https://xcp-ng.org/forum/

3

Are you connecting the zvol clone one of the three servers in your pool?

When a storage repository is created a UUID is generated to be used for the naming of the SR on the backend. If you do a ‘pvs’ from any of your hypervisors you can see this. I think what is going on is that there is a conflict adding the SR because of another SR existing with the same UUID and name on the backend.

If you have some spare hardware around you could try and connect a freshly installed XCP-ng node to your cloned zvol SR and see where that gets you.

Hope that helps!

4

@mobeets

The conflict with UUID was the issue.

End up with using another xcpng and it works.

Thanks