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Hi Trinath,
have you updated your qemu.conf file with the following settings ? 
user = "root"
group = "root"
clear_emulator_capabilities = 0

and into the cg_group_device_acl = [
/dev/null", "/dev/full", "/dev/zero",
"/dev/random", "/dev/urandom",
"/dev/ptmx", "/dev/kvm", "/dev/kqemu",
"/dev/rtc", "/dev/hpet", "/dev/net/tun",
] 
Razique 
razique.mahroua at gmail.com



Le 20 juin 2012 à 13:30, Trinath Somanchi a écrit :

> Hi-
> 
> When I launch an VM instance, I'm getting this error while spawning.
> 
> 2012-06-20 16:57:21 ERROR nova.compute.manager [req-2266a451-48d4-432a-aca2-54b09873036c ddd1015a21f441fd9dc5fe532fff09f4 3086217db56c4bdba27a6571fd424642] [instance: b104ae3d-0263-41d9-b0e8-80b48746f031] Instance failed to spawn
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031] Traceback (most recent call last):
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 592, in _spawn
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]     self._legacy_nw_info(network_info), block_device_info)
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 114, in wrapped
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]     return f(*args, **kw)
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 922, in spawn
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]     self._create_new_domain(xml)
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 1575, in _create_new_domain
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]     domain.createWithFlags(launch_flags)
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 581, in createWithFlags
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031]     if ret == -1: raise libvirtError ('virDomainCreateWithFlags() failed', dom=self)
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031] libvirtError: internal error Process exited while reading console log output: char device redirected to /dev/pts/11
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031] kvm: -netdev tap,ifname=tap3eb413de-ac,script=,id=hostnet0: could not open /dev/net/tun: Operation not permitted
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031] kvm: -netdev tap,ifname=tap3eb413de-ac,script=,id=hostnet0: Device 'tap' could not be initialized
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031] 
> 2012-06-20 16:57:21 TRACE nova.compute.manager [instance: b104ae3d-0263-41d9-b0e8-80b48746f031] 
> 2012-06-20 16:57:21 DEBUG nova.compute.manager [req-2266a451-48d4-432a-aca2-54b09873036c ddd1015a21f441fd9dc5fe532fff09f4 3086217db56c4bdba27a6571fd424642] [instance: b104ae3d-0263-41d9-b0e8-80b48746f031] Deallocating network for instance from (pid=11561) _deallocate_network /usr/lib/python2.7/dist-packages/nova/compute/manager.py:616
> 2012-06-20 16:57:21 DEBUG nova.rpc.amqp [req-2266a451-48d4-432a-aca2-54b09873036c ddd1015a21f441fd9dc5fe532fff09f4 3086217db56c4bdba27a6571fd424642] Making asynchronous cast on network... from (pid=11561) cast /usr/lib/python2.7/dist-packages/nova/rpc/amqp.py:346
> 2012-06-20 16:57:21 ERROR nova.rpc.amqp [req-2266a451-48d4-432a-aca2-54b09873036c ddd1015a21f441fd9dc5fe532fff09f4 3086217db56c4bdba27a6571fd424642] Exception during message handling
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp Traceback (most recent call last):
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/rpc/amqp.py", line 252, in _process_data
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     rval = node_func(context=ctxt, **node_args)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 114, in wrapped
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     return f(*args, **kw)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 177, in decorated_function
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     sys.exc_info())
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     self.gen.next()
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 171, in decorated_function
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     return function(self, context, instance_uuid, *args, **kwargs)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 651, in run_instance
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     do_run_instance()
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 945, in inner
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     retval = f(*args, **kwargs)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 650, in do_run_instance
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     self._run_instance(context, instance_uuid, **kwargs)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 451, in _run_instance
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     self._set_instance_error_state(context, instance_uuid)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     self.gen.next()
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 432, in _run_instance
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     self._deallocate_network(context, instance)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     self.gen.next()
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 429, in _run_instance
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     injected_files, admin_password)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 592, in _spawn
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     self._legacy_nw_info(network_info), block_device_info)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 114, in wrapped
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     return f(*args, **kw)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 922, in spawn
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     self._create_new_domain(xml)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 1575, in _create_new_domain
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     domain.createWithFlags(launch_flags)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 581, in createWithFlags
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp     if ret == -1: raise libvirtError ('virDomainCreateWithFlags() failed', dom=self)
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp libvirtError: internal error Process exited while reading console log output: char device redirected to /dev/pts/11
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp kvm: -netdev tap,ifname=tap3eb413de-ac,script=,id=hostnet0: could not open /dev/net/tun: Operation not permitted
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp kvm: -netdev tap,ifname=tap3eb413de-ac,script=,id=hostnet0: Device 'tap' could not be initialized
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp 
> 2012-06-20 16:57:21 TRACE nova.rpc.amqp
> 
> 
> Kindly help me resolve this error.
> 
> 
> 
> 
> -- 
> Regards,
> ----------------------------------------------
> Trinath Somanchi,
> +91 9866 235 130
> 
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