magg@cloudHQ1:~$ sudo tail -f /var/log/nova/nova-compute.log
(nova.rpc): TRACE: RemoteError: ProcessExecutionError Unexpected error while running command.
(nova.rpc): TRACE: Command: sudo FLAGFILE=/etc/nova/nova.conf NETWORK_ID=1 dnsmasq --strict-order --bind-interfaces --conf-file= --domain=novalocal --pid-file=/var/lib/nova/networks/nova-br100.pid --listen-address=172.16.0.4 --except-interface=lo --dhcp-range=172.16.0.3,static,120s --dhcp-lease-max=16 --dhcp-hostsfile=/var/lib/nova/networks/nova-br100.conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro
(nova.rpc): TRACE: Exit code: 2
(nova.rpc): TRACE: Stdout: ''
(nova.rpc): TRACE: Stderr: '\ndnsmasq: failed to create listening socket for 172.16.0.4: Address already in use\n'
(nova.rpc): TRACE: [u'Traceback (most recent call last):\n', u'  File "/usr/lib/python2.7/dist-packages/nova/rpc/impl_kombu.py", line 620, in _process_data\n    rval = node_func(context=ctxt, **node_args)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/network/manager.py", line 221, in allocate_for_instance\n    ips = super(FloatingIP, self).allocate_for_instance(context, **kwargs)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/network/manager.py", line 446, in allocate_for_instance\n    requested_networks=requested_networks)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/network/manager.py", line 171, in _allocate_fixed_ips\n    vpn=vpn, address=address)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/network/manager.py", line 1041, in allocate_fixed_ip\n    self._setup_network(context, network)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/network/manager.py", line 1101, in _setup_network\n    self.driver.update_dhcp(context, dev, network_ref)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 685, in inner\n    retval = f(*args, **kwargs)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/network/linux_net.py", line 647, in update_dhcp\n    _execute(*cmd, run_as_root=True)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/network/linux_net.py", line 745, in _execute\n    return utils.execute(*cmd, **kwargs)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 188, in execute\n    cmd=\' \'.join(cmd))\n', u"ProcessExecutionError: Unexpected error while running command.\nCommand: sudo FLAGFILE=/etc/nova/nova.conf NETWORK_ID=1 dnsmasq --strict-order --bind-interfaces --conf-file= --domain=novalocal --pid-file=/var/lib/nova/networks/nova-br100.pid --listen-address=172.16.0.4 --except-interface=lo --dhcp-range=172.16.0.3,static,120s --dhcp-lease-max=16 --dhcp-hostsfile=/var/lib/nova/networks/nova-br100.conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro\nExit code: 2\nStdout: ''\nStderr: '\\ndnsmasq: failed to create listening socket for 172.16.0.4: Address already in use\\n'\n"]
(nova.rpc): TRACE:
2011-11-10 14:03:26,389 INFO nova.compute.manager [-] Updating host status
2011-11-10 14:03:26,643 INFO nova.compute.manager [-] Found 1 in the database and 0 on the hypervisor.
2011-11-10 14:04:26,895 INFO nova.compute.manager [-] Found 1 in the database and 0 on the hypervisor.