Xcp-ng 8.2.1 - issues reverting to vm snapshot

[AlexanderKgr]

ISSUE TYPE

• Bug Report

COMPONENT NAME

Vm restore

CLOUDSTACK VERSION

4.17.1.0

CONFIGURATION

Advanced Networking

OS / ENVIRONMENT

Ubuntu server 20.04

SUMMARY

When trying to restore a "disk" vm snapshot and vm is poweroff i have the following message

and from the cs logs

When trying to restore a "disk" vm and the vm is powered off from console i have the following message

Which is normal is some consideration

STEPS TO REPRODUCE

Create a vm, take a disk snapshot and try to restore.
You will have the error i describe

EXPECTED RESULTS

Restore vm to snapshot

ACTUAL RESULTS

Error messages

[AlexanderKgr]

snapshot with memory works as it should

[DaanHoogland]

@AlexanderKgr you can revert a disk to a disk snapshot and a vm to a vm snapshot. It seems you are trying to revert a vm to a disk snapshot. Is that correct?
Also you are describing in both examples restoring a powered off vm to a disk snapshot .
Am I misunderstanding your scenarios?

[AlexanderKgr]

Let me clear this.
1st scenario tried to restore a disk snapshot while the instance is off (from cloudstack and from xen orchestra)
Received the error that hypervisor doesn't support guest os - while the instance was working normaly if booted.
It was for a colleague that he wanted to revert his instance to a previous state.
So tried the 2nd scenario.
Shuted down the instance only from console and tried to restored it from xen orchestra, where there wasn't any snapshot.
Tried from cloudstack to restore and i had the error that i couldn't restore disk in a running instance which is normal.

Tried scenarios with disk and memory and everything is working.

Summing up "disk" snapshots with xcp-ng does not work!
Please try it.

[AlexanderKgr]

Anyone?

[DaanHoogland]

@AlexanderKgr it might help to ask on the users mailing list

[weizhouapache]

@AlexanderKgr
guest os mappings for 'Ubuntu 20.04 LTS" are missing for xenserver and vmware.
please update the template guest os type to "Ubuntu 18.04 LTS" and retry.
We will create a fix

[weizhouapache]

the os mappings were added in #4672, but it was broken by #5911
fix: #7095

[MartinEmrich]

I experienced this with ACS 4.18.1 and XCP-ng as a hypervisor.

(i-39-6822-VM_VS_20231020072617) Revert VM: i-39-6822-VM to snapshot: i-39-6822-VM_VS_20231020072617 failed due to Hypervisor com.cloud.hypervisor.xenserver.resource.XenServer650Resource doesn't support guest OS type Debian GNU/Linux 12 (64-bit). you can choose 'Other install media' to run it as HVM

The message is IMHO wrong, the VM with Debian 12 worked fine before.

Could you reopen the issue? Or shall I create a new one?

[weizhouapache]

@MartinEmrich
please create a new issue and link to this. thanks

[MartinEmrich]

@weizhouapache done: #8123