Re: What causes virt-manager to connect in read only mode?

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On 04/13/2009 01:17 PM, Joseph S wrote:
> Virt manager 0.7.0 on Centos (libvirt 0.3.3) does this:
> 
> [Sun, 12 Apr 2009 20:57:00 virt-manager 5830] INFO (virt-manager:144)
> Application startup
> [Sun, 12 Apr 2009 20:57:01 virt-manager 5833] DEBUG (engine:81) About to
> connect to uris ['qemu:///system']
> [Sun, 12 Apr 2009 20:57:01 virt-manager 5833] DEBUG (connection:144)
> Bonding masters are: []
> [Sun, 12 Apr 2009 20:57:01 virt-manager 5833] DEBUG (connection:170) Got
> physical net device /org/freedesktop/Hal/devices/net_00_30_48_c6_55_e0
> [Sun, 12 Apr 2009 20:57:01 virt-manager 5833] DEBUG (connection:230)
> Adding net device eth0 00:30:48:c6:55:e0 /sys/class/net/eth0 (bridge: br0)
> [Sun, 12 Apr 2009 20:57:01 virt-manager 5833] DEBUG (connection:202)
> Checking for VLANs on /sys/class/net/eth0
> [Sun, 12 Apr 2009 20:57:01 virt-manager 5833] DEBUG (connection:170) Got
> physical net device /org/freedesktop/Hal/devices/net_00_30_48_c6_55_e1
> [Sun, 12 Apr 2009 20:57:01 virt-manager 5833] DEBUG (connection:230)
> Adding net device eth1 00:30:48:c6:55:e1 /sys/class/net/eth1 (bridge: br1)
> [Sun, 12 Apr 2009 20:57:01 virt-manager 5833] DEBUG (connection:202)
> Checking for VLANs on /sys/class/net/eth1
> [Sun, 12 Apr 2009 20:57:02 virt-manager 5833] DEBUG (engine:320) window
> counter incremented to 1
> [Sun, 12 Apr 2009 20:57:07 virt-manager 5833] DEBUG (connection:431)
> Scheduling background open thread for qemu:///system
> [Sun, 12 Apr 2009 20:57:07 virt-manager 5833] DEBUG (connection:561)
> Background thread is running
> [Sun, 12 Apr 2009 20:57:07 virt-manager 5833] ERROR (connection:551)
> Read/write connection failed for qemu:///system, falling back on read-only.
> Traceback (most recent call last):
>   File "/usr/local/share/virt-manager/virtManager/connection.py", line
> 536, in _try_open
>     self.vmm = libvirt.openAuth(self.uri,
> AttributeError: 'module' object has no attribute 'openAuth'

The version of libvirt on your machine lacks the openAuth command, so we
are falling back to read-only mode. We could try to detect this and just
try the plain 'open' command instead.

That said, if you are using virt-manager 0.7.0 on centos, you should
probably update libvirt beyond the stock centos version as well, since
that is where most of the features come from.

- Cole

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