[Rdo-list] Trying out Neutron Quickstart running into issues with netns (l2 agent and dhcp agent)

[Thomas Graf]

On 08/05/2013 01:52 PM, Perry Myers wrote:
> On 08/05/2013 04:27 AM, Thomas Graf wrote:
>> On 08/04/2013 05:47 PM, Kashyap Chamarthy wrote:
>>>>> 2013-08-04 09:08:05  WARNING [quantum.openstack.common.loopingcall]
>>>>> task run outlasted interval by 56.853869 sec
>>>>> 2013-08-04 09:08:06     INFO [quantum.agent.dhcp_agent]
>>>>> Synchronizing state
>>>>> 2013-08-04 09:32:34    ERROR [quantum.agent.dhcp_agent] Unable to
>>>>> enable dhcp.
>>>>> Traceback (most recent call last):
>>>>>     File
>>>>> "/usr/lib/python2.6/site-packages/quantum/agent/dhcp_agent.py", line
>>>>> 131, in call_driver
>>>>>       getattr(driver, action)()
>>>>>     File
>>>>> "/usr/lib/python2.6/site-packages/quantum/agent/linux/dhcp.py", line
>>>>> 124, in enable
>>>>>       reuse_existing=True)
>>>>>     File
>>>>> "/usr/lib/python2.6/site-packages/quantum/agent/dhcp_agent.py", line
>>>>> 554, in setup
>>>>>       namespace=namespace)
>>>>>     File
>>>>> "/usr/lib/python2.6/site-packages/quantum/agent/linux/interface.py",
>>>>> line 181, in plug
>>>>>       ns_dev.link.set_address(mac_address)
>>>>>     File
>>>>> "/usr/lib/python2.6/site-packages/quantum/agent/linux/ip_lib.py",
>>>>> line 180, in set_address
>>>>>       self._as_root('set', self.name, 'address', mac_address)
>>>>>     File
>>>>> "/usr/lib/python2.6/site-packages/quantum/agent/linux/ip_lib.py",
>>>>> line 167, in _as_root
>>>>>       kwargs.get('use_root_namespace', False))
>>>>>     File
>>>>> "/usr/lib/python2.6/site-packages/quantum/agent/linux/ip_lib.py",
>>>>> line 47, in _as_root
>>>>>       namespace)
>>>>>     File
>>>>> "/usr/lib/python2.6/site-packages/quantum/agent/linux/ip_lib.py",
>>>>> line 58, in _execute
>>>>>       root_helper=root_helper)
>>>>>     File
>>>>> "/usr/lib/python2.6/site-packages/quantum/agent/linux/utils.py",
>>>>> line 61, in execute
>>>>>       raise RuntimeError(m)
>>>>> RuntimeError:
>>>>> Command: ['sudo', 'quantum-rootwrap', '/etc/quantum/rootwrap.conf',
>>>>> 'ip', 'link', 'set', 'tap07d8cc77-fc', 'address', 'fa:16:3e:da:66:28']
>>>>> Exit code: 2
>>>>> Stdout: ''
>>>>> Stderr: 'RTNETLINK answers: Device or resource busy\n'
>>
>> Quantum attempts to change the MAC address while the link is up. The
>> live MAC address change feature is not supported in the openstack
>> kernel at this point.
>>
>> We can attempt a backport of the feature to the openstack kernel and
>> enable it for tap and veth devices or we modify quantum to bring down
>> the interface before changing the mac address and bring it up again
>> afterwards.
>
> Thanks Thomas.  Or perhaps we need a fix to Quantum itself to create the
> link with the proper MAC address to begin with rather than changing it
> in a second step?

This would make sense from my POV. I doubt that it's desirable to have
the wrong MAC address live at any point.

> With the above error, I wonder if the Quantum Quickstart ever fully
> worked at all on either RHOS or RDO Grizzly?
>
> Terry, how did you work around the above issue when testing on RHOS?