Mailing List Archive: Destroying an HVM Zombie [Guest]

I've created a CentOS-7 VM from the CLI by following the instructions in
the "Citrix XenServer 7.2 Virtual Machine User's Guide":

===========================
# xe network-list | grep -B1 eth0
uuid ( RO) : 47a6223e-74d0-b75d-bec3-0ca6324b498c
name-label ( RW): Pool-wide network associated with eth0

# xe pool-param-list uuid=e3cdb4f9-6589-2ac2-f08a-9318a8a48a61 | grep
default-SR
default-SR ( RW): 21044441-dfba-9293-408b-41379e194718

# xe vm-install template=Red\ Hat\ Enterprise\ Linux\ 7
new-name-label=CentOS7-1 sr-uuid=21044441-dfba-9293-408b-41379e194718
2f343ae1-0d57-ef21-6a54-6abe7b7264c6

# xe vif-create vm-uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
network-uuid=47a6223e-74d0-b75d-bec3-0ca6324b498c mac=random device=0
f21d558a-c9ba-bb65-d2bc-6c2310d4a0cf

# xe vm-param-set uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
other-config:install-repository=nfs://
192.168.0.95/srv/images/ISO/CentOS-7.7-x86_64-Minimal.iso

# xe vm-start uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
===========================

But I'm not able to connect to the VNC console because the guest doesn't
seem to have an entry in Xenstore:

===========================
# xe vm-list | grep -B1 -A1 CentOS
uuid ( RO) : 2f343ae1-0d57-ef21-6a54-6abe7b7264c6
name-label ( RW): CentOS7-1
power-state ( RO): running

# xe vm-param-list uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6 | grep dom-id
dom-id ( RO): 1

# xenstore-read /local/domain/1
xenstore-read: couldn't read path /local/domain/1
===========================

And I'm not able to shutdown or destroy the VM:

===========================
# xe vm-suspend uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
You attempted an operation on a VM which lacks the feature.
vm: 2f343ae1-0d57-ef21-6a54-6abe7b7264c6 (CentOS7-1)

# xe vm-shutdown uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
You attempted an operation on a VM which lacks the feature.
vm: 2f343ae1-0d57-ef21-6a54-6abe7b7264c6 (CentOS7-1)

# xe vm-destroy uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
You attempted an operation on a VM that was not in an appropriate power
state at the time; for example, you attempted to start a VM that was
already running. The parameters returned are the VM's handle, and the
expected and actual VM state at the time of the call.
vm: 2f343ae1-0d57-ef21-6a54-6abe7b7264c6 (CentOS7-1)
expected: halted, suspended
actual: running
===========================

How can I destroy this VM?

TIA,
Eric Pretorious
Reno, Nevada

FWIW: I've successfully destroyed this "zombie" VM using the vm-uninstall
command...

# xe vm-uninstall vm=CentOS7-1
The following items are about to be destroyed
VM : 2f343ae1-0d57-ef21-6a54-6abe7b7264c6 (CentOS7-1)
VDI: 5e023cf6-d7ac-4c62-8e62-4f129a82e443 (0)
Type 'yes' to continue
yes
All objects destroyed

HTH,
Eric P.
Reno, Nevada

On Thu, Nov 3, 2022 at 5:36 PM Practical XenServer <
practicalxenserver@gmail.com> wrote:

> I've created a CentOS-7 VM from the CLI by following the instructions in
> the "Citrix XenServer 7.2 Virtual Machine User's Guide":
>
> ===========================
> # xe network-list | grep -B1 eth0
> uuid ( RO) : 47a6223e-74d0-b75d-bec3-0ca6324b498c
> name-label ( RW): Pool-wide network associated with eth0
>
> # xe pool-param-list uuid=e3cdb4f9-6589-2ac2-f08a-9318a8a48a61 | grep
> default-SR
> default-SR ( RW): 21044441-dfba-9293-408b-41379e194718
>
> # xe vm-install template=Red\ Hat\ Enterprise\ Linux\ 7
> new-name-label=CentOS7-1 sr-uuid=21044441-dfba-9293-408b-41379e194718
> 2f343ae1-0d57-ef21-6a54-6abe7b7264c6
>
> # xe vif-create vm-uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
> network-uuid=47a6223e-74d0-b75d-bec3-0ca6324b498c mac=random device=0
> f21d558a-c9ba-bb65-d2bc-6c2310d4a0cf
>
> # xe vm-param-set uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
> other-config:install-repository=nfs://
> 192.168.0.95/srv/images/ISO/CentOS-7.7-x86_64-Minimal.iso
>
> # xe vm-start uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
> ===========================
>
> But I'm not able to connect to the VNC console because the guest doesn't
> seem to have an entry in Xenstore:
>
> ===========================
> # xe vm-list | grep -B1 -A1 CentOS
> uuid ( RO) : 2f343ae1-0d57-ef21-6a54-6abe7b7264c6
> name-label ( RW): CentOS7-1
> power-state ( RO): running
>
> # xe vm-param-list uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6 | grep dom-id
> dom-id ( RO): 1
>
> # xenstore-read /local/domain/1
> xenstore-read: couldn't read path /local/domain/1
> ===========================
>
> And I'm not able to shutdown or destroy the VM:
>
> ===========================
> # xe vm-suspend uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
> You attempted an operation on a VM which lacks the feature.
> vm: 2f343ae1-0d57-ef21-6a54-6abe7b7264c6 (CentOS7-1)
>
> # xe vm-shutdown uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
> You attempted an operation on a VM which lacks the feature.
> vm: 2f343ae1-0d57-ef21-6a54-6abe7b7264c6 (CentOS7-1)
>
> # xe vm-destroy uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
> You attempted an operation on a VM that was not in an appropriate power
> state at the time; for example, you attempted to start a VM that was
> already running. The parameters returned are the VM's handle, and the
> expected and actual VM state at the time of the call.
> vm: 2f343ae1-0d57-ef21-6a54-6abe7b7264c6 (CentOS7-1)
> expected: halted, suspended
> actual: running
> ===========================
>
> How can I destroy this VM?
>
> TIA,
> Eric Pretorious
> Reno, Nevada
>