cannot create VM - [EFAULT] Failed to connect to libvirt

[ruhakan]

Version: TrueNAS-SCALE-23.10.1.3
long story short - trying to create a VM on truenas scale. The first VM ever.
creation fails. below tested to create the most simple VM config.
all troubleshooting guides i came across are not valid for version 23. So running out of ideas.

...please help :)

Error: Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/middlewared/main.py", line 201, in call_method
result = await self.middleware._call(message['method'], serviceobj, methodobj, params, app=self) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1342, in _call
return await methodobj(*prepared_call.args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/middlewared/service/crud_service.py", line 169, in create
return await self.middleware._call(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1342, in _call
return await methodobj(*prepared_call.args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/middlewared/service/crud_service.py", line 194, in nf
rv = await func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/middlewared/schema/processor.py", line 44, in nf
res = await f(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/middlewared/schema/processor.py", line 177, in nf
return await func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/middlewared/plugins/vm/vms.py", line 198, in do_create
await self.middleware.run_in_thread(self._check_setup_connection)
File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1254, in run_in_thread
return await self.run_in_executor(self.thread_pool_executor, method, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1251, in run_in_executor
return await loop.run_in_executor(pool, functools.partial(method, *args, **kwargs)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/concurrent/futures/thread.py", line 58, in run result = self.fn(*self.args, **self.kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/middlewared/plugins/vm/connection.py", line 71, in _check_setup_connection
self._check_connection_alive() File "/usr/lib/python3/dist-packages/middlewared/plugins/vm/connection.py", line 66, in _check_connection_alive
raise CallError('Failed to connect to libvirt') middlewared.service_exception.CallError: [EFAULT] Failed to connect to libvirt

 

[chuck32]

Unfortunately I don't know what happened to the jira ticket. Seems like it was deleted?

 

[SKiZZ]

I had the same issue and it turned out to be too many files opened because I worked on setting up apps first before any virtualization. I used these settings.

Too many open files

Hello, I've been using Freenas/Truenas a while now and have been using Transmission on NAS's for the longest time. I've never really had an issue until the last year or so. My issue is that (apparently) randomly transmission crashes saying/usr/local/share/transmission/web/index.html (Too many...

www.truenas.com

 

[SKiZZ]

Looks like you may also need to add after increasing files.

 

[ruhakan]

That did it! Thank you guys.

just to recap:
I set those sysctl values:

sudo sysctl -w fs.inotify.max_user_watches=1048576;sudo sysctl -w fs.inotify.max_user_instances=8192;sudo sysctl -w vm.max_map_count=524288;

and then set the ACL as SKiZZ pointed out.

VM creation works now.

 

[SKiZZ]

That did it! Thank you guys.

just to recap:
I set those sysctl values:

and then set the ACL as SKiZZ pointed out.

VM creation works now.

I think you'll need to do the below for it be persistant. The sudo command makes it so you dont have to reboot.

 

[ruhakan]

I think you'll need to do the below for it be persistant. The sudo command makes it so you dont have to reboot.

View attachment 75309

I actually did that via the gui - just wanted to post a summary for the next poor soul to stumble over this conversation.

 

[grumpus811]

I am that poor soul. I had to do both. It worked, thank you.