Subject: Errors when trimming VM

[paulst...@gmail.com]

Hello,

I have the following error when I try to trim my debian-8 template VM

qvm-trim-template debian-8
Disk usage before:
6212224 /var/lib/qubes/vm-templates/debian-8/root.img
Creating temporary VM...
Traceback (most recent call last):
File "/usr/bin/qvm-trim-template", line 172, in <module>
main()
File "/usr/bin/qvm-trim-template", line 115, in main
fstrim_vm.create_on_disk()
File "/usr/lib64/python2.7/site-packages/qubes/modules/000QubesVm.py", line 1292, in create_on_disk
self.storage.create_on_disk(verbose, source_template)
File "/usr/lib64/python2.7/site-packages/qubes/storage/__init__.py", line 175, in create_on_disk
os.mkdir (self.vmdir)
OSError: [Errno 17] File exists: '/var/lib/qubes/appvms/trim-debian-8'

I tried the following naive solution but it didn't work

mv /var/lib/qubes/appvms/trim-debian-8 /var/lib/qubes/appvms/trim-debian-8.old

qvm-trim-template debian-8
Disk usage before:
6212224 /var/lib/qubes/vm-templates/debian-8/root.img
Creating temporary VM...
Traceback (most recent call last):
File "/usr/bin/qvm-trim-template", line 172, in <module>
main()
File "/usr/bin/qvm-trim-template", line 115, in main
fstrim_vm.create_on_disk()
File "/usr/lib64/python2.7/site-packages/qubes/modules/000QubesVm.py", line 1314, in create_on_disk
self._update_libvirt_domain()
File "/usr/lib64/python2.7/site-packages/qubes/modules/000QubesVm.py", line 761, in _update_libvirt_domain
raise e
libvirt.libvirtError: operation failed: domain 'trim-debian-8' already exists with uuid 7f653418-846b-4ddd-b42f-52d800fc478c

I thought about trying to recover a backup qubes.xml from
/var/lib/qubes/backup, but the UUID 7f653418-846b-4ddd-b42f-52d800fc478c
does not appear in any them and I'm not sure which one to use because
I've run updates since.

If I then do

rm -rf /var/lib/qubes/appvms/trim-debian-8
mv /var/lib/qubes/appvms/trim-debian-8.old /var/lib/qubes/appvms/trim-debian-8

I'm back to where I started.

Can anyone please tell me how to fix this problem.

Thanks,

Paul

[paulst...@gmail.com]

Since posting my question above I found the following
https://groups.google.com/forum/#!topic/qubes-users/23tna6I9gE4

It guided me to a solution which was to run

rm -rf /var/lib/qubes/appvms/trim-debian-8
virsh -c xen:/// undefine trim-debian-8
qvm-trim-template debian-8

This fixes the problem.