virt-manager fails to create a filesystem passthrough with the Proxy driver

[Mike Matera]

In the "Add New Virtual Hardware" dialog virt-manager let's you create a filesystem passthrough with the "Proxy" type. That's very useful for safely sharing data owned by a user. However the process fails to complete with an error:

Error adding device: unsupported configuration: unknown fs driver type 'proxy'

The traceback of the error is:

Error adding device: unsupported configuration: unknown fs driver type 'proxy'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/addhardware.py", line 1197, in add_device
    self.vm.add_device(self._dev)
  File "/usr/share/virt-manager/virtManager/domain.py", line 406, in add_device
    self.redefine_cached()
  File "/usr/share/virt-manager/virtManager/domain.py", line 335, in redefine_cached
    self._redefine_xml(xml)
  File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 147, in _redefine_xml
    return self._redefine_helper(origxml, newxml)
  File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 137, in _redefine_helper
    self._define(newxml)
  File "/usr/share/virt-manager/virtManager/domain.py", line 879, in _define
    self.conn.define_domain(newxml)
  File "/usr/share/virt-manager/virtManager/connection.py", line 814, in define_domain
    return self.vmm.defineXML(xml)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3237, in defineXML
    if ret is None:raise libvirtError('virDomainDefineXML() failed', conn=self)
libvirtError: unsupported configuration: unknown fs driver type 'proxy'

This seems wrong because "virtfs-proxy-helper" is installed.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Serge Hallyn (serge-hallyn)]

Could you please show screenshots as you walk through the 'add hardware' wizard?

Also please tell us which release you are on.

[Mike Matera (fatboymaximus)]

Your wish is my command. Here's a walkthrough and the error. I'm using Ubuntu 14.04 LTS.

[Mike Matera (fatboymaximus)]

Here's adding new hardware

[Mike Matera (fatboymaximus)]

Now the error.

[Serge Hallyn (serge-hallyn)]

Thanks. On my ubuntu laptop, where your add new hardware screen shows 'Proxy', mine shows 'mount'. So this looks like something which needs to be fixed in the 14.04 virt-manager.