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Your hosts get ips from the fixed range in multi_host mode. It looks like your network is multi_host=True. this is the only reason  sonoma would have been assigned an ip. So you can either run nova-network on sonoma or set multi_host=0 on your network in the database. If you want to switch back to multi_host=0 you will likely have to clean out the db tables, so you might do best dropping all records from the networks and fixed_ips tables and recreating the network.

Vish

On Nov 20, 2012, at 4:52 PM, Ahmed Al-Mehdi <ahmed at coraid.com> wrote:

> Hi Vish,
> 
> Thank you very much for your help, I really appreciate it.
> 
> My setup has two nodes:
> 
> controller-node (hostname: bodega;  nova-network running;  no nova-compute running)
> 	eth0:	10.176.20.158
> 	eth1:	No IP assigned (VM network)
>  
> compute-node (hostname: sonoma;  nova-compute running only).  
> 	eth0:	10.176.20.4
> 	eth1:	No IP assigned (VM network)
> 
> My network configuration is in single-host mode.  Both the host's hostname and their IPs has not changed.
> 
> I believe my setup is affected with issue (a), "have a network or fixed ip with an old hostname assigned".
> 
> root at bodega:/etc/nova# mysql -u root -pmysqlsecret   nova -e 'select * from fixed_ips where host="sonoma"'
> +---------------------+---------------------+------------+---------+----+---------------+------------+-----------+--------+----------+----------------------+--------+---------------+
> | created_at          | updated_at          | deleted_at | deleted | id | address       | network_id | allocated | leased | reserved | virtual_interface_id | host   | instance_uuid |
> +---------------------+---------------------+------------+---------+----+---------------+------------+-----------+--------+----------+----------------------+--------+---------------+
> | 2012-11-13 18:49:37 | 2012-11-16 21:45:32 | NULL       |       0 |  3 | 192.168.100.2 |          1 |         0 |      0 |        0 |                 NULL | sonoma | NULL          |
> +---------------------+---------------------+------------+---------+----+---------------+------------+-----------+--------+----------+----------------------+--------+---------------+
> root at bodega:/etc/nova# 
> root at bodega:/etc/nova# mysql -u root -pmysqlsecret   nova -e 'select * from networks where host="sonoma"'
> root at bodega:/etc/nova#  (NO OUTPUT)
> 
> I am a bit confused, why is "192.168.100.2" assigned to sonoma?  Isn't that IP range reserved for VMs?
> 
> Should sonoma have the IP address "10.176.20.4"?  How can I clear the issue, so I don't get the RPC message timeout.
> 
> 
> Regards,
> Ahmed.
> 
> 
> From: Vishvananda Ishaya <vishvananda at gmail.com>
> Date: Tuesday, November 20, 2012 4:08 PM
> To: Ahmed Al-Mehdi <ahmed at coraid.com>
> Cc: "openstack at lists.launchpad.net" <openstack at lists.launchpad.net>
> Subject: Re: [Openstack] Floating IP vs. Fixed IP in nova-network
> 
>> 
>> On Nov 20, 2012, at 4:02 PM, Ahmed Al-Mehdi <ahmed at coraid.com> wrote:
>> 
>>> Hi Vish,
>>> 
>>> I do not have auto_assign_floating_ip set.  So, I can safely assume nova-network is assigning fixed-IP, right?
>> 
>> you always get a fixed ip
>>> 
>>> Sorry to impose, but do you have a few minutes to help me understand by I am getting a RPC message timeout issue which is prohibiting me from launching a VM.  I looked through the logs extensively, but I can't figure out, who the RPC msg is destine for, and why no response.
>> 
>> do you have a machine with the hostname sonoma? Perhaps you did at one point and the hostname has changed?
>> 
>> I suspect either:
>> 
>> a) you have a network or fixed ip with an old hostname assigned:
>> mysql nova -e 'select * from fixed_ips where host="sonoma"'
>> mysql nova -e 'select * from networks where host="sonoma"'
>> 
>> or (more likely)
>> b) you are running multi_host mode and you have nova-compute running on the host 'sonoma' and you don't have nova-network running on the host like you should.
>> 
>> Vish
>> 
>>> 
>>> 2012-11-18 15:50:29 DEBUG nova.openstack.common.rpc.amqp [-] Making asynchronous call on network.sonoma ... from (pid=1375) multicall /usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/amqp
>>> .py:351
>>> 2012-11-18 15:50:29 DEBUG nova.openstack.common.rpc.amqp [-] MSG_ID is d73be9ea76b3412493d0752abb9d5a02 from (pid=1375) multicall /usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/amqp.py:
>>> 354
>>> 2012-11-18 15:50:52 DEBUG nova.openstack.common.rpc.amqp [-] received {u'_context_roles': [], u'_msg_id': u'b2bc0715982846cd916a8ff61b2513af', u'_context_quota_class': None, u'_context_request_id':
>>>  u'req-22e6e99a-c582-449c-8d61-d4ee57f1ac57', u'_context_service_catalog': None, u'_context_user_name': None, u'_context_auth_token': '<SANITIZED>', u'args': {u'instance_id': 5, u'instance_uuid': u
>>> '4e80964e-5bd1-4df4-a517-223c79d55517', u'host': u'sonoma', u'project_id': u'ce1e819636744dc680fa5515f6475e87', u'rxtx_factor': 1.0}, u'_context_instance_lock_checked': False, u'_context_project_na
>>> me': None, u'_context_is_admin': True, u'_context_project_id': None, u'_context_timestamp': u'2012-11-18T23:50:47.233052', u'_context_read_deleted': u'no', u'_context_user_id': None, u'method': u'g
>>> et_instance_nw_info', u'_context_remote_address': None} from (pid=1375) _safe_log /usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/common.py:195
>>> 2012-11-18 15:50:52 DEBUG nova.openstack.common.rpc.amqp [-] unpacked context: {'project_name': None, 'user_id': None, 'roles': [], 'timestamp': u'2012-11-18T23:50:47.233052', 'auth_token': '<SANIT
>>> IZED>', 'remote_address': None, 'quota_class': None, 'is_admin': True, 'service_catalog': None, 'request_id': u'req-22e6e99a-c582-449c-8d61-d4ee57f1ac57', 'instance_lock_checked': False, 'project_i
>>> d': None, 'user_name': None, 'read_deleted': u'no'} from (pid=1375) _safe_log /usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/common.py:195
>>> 2012-11-18 15:50:52 DEBUG nova.utils [req-22e6e99a-c582-449c-8d61-d4ee57f1ac57 None None] Got semaphore "get_dhcp" for method "_get_dhcp_ip"... from (pid=1375) inner /usr/lib/python2.7/dist-package
>>> s/nova/utils.py:713
>>> 2012-11-18 15:50:52 DEBUG nova.utils [req-22e6e99a-c582-449c-8d61-d4ee57f1ac57 None None] Got semaphore "get_dhcp" for method "_get_dhcp_ip"... from (pid=1375) inner /usr/lib/python2.7/dist-package
>>> s/nova/utils.py:713
>>> 2012-11-18 15:51:09 DEBUG nova.manager [-] Running periodic task FlatDHCPManager._publish_service_capabilities from (pid=1375) periodic_tasks /usr/lib/python2.7/dist-packages/nova/manager.py:172
>>> 2012-11-18 15:51:09 DEBUG nova.manager [-] Running periodic task FlatDHCPManager._disassociate_stale_fixed_ips from (pid=1375) periodic_tasks /usr/lib/python2.7/dist-packages/nova/manager.py:172
>>> 2012-11-18 15:51:29 ERROR nova.openstack.common.rpc.common [-] Timed out waiting for RPC response: timed out
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common Traceback (most recent call last):
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common   File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/impl_kombu.py", line 513, in ensure
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common     return method(*args, **kwargs)
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common   File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/impl_kombu.py", line 590, in _consume
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common     return self.connection.drain_events(timeout=timeout)
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/connection.py", line 175, in drain_events
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common     return self.transport.drain_events(self.connection, **kwargs)
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/transport/pyamqplib.py", line 238, in drain_events
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common     return connection.drain_events(**kwargs)
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/transport/pyamqplib.py", line 57, in drain_events
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common     return self.wait_multi(self.channels.values(), timeout=timeout)
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/transport/pyamqplib.py", line 63, in wait_multi
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common     chanmap.keys(), allowed_methods, timeout=timeout)
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/transport/pyamqplib.py", line 120, in _wait_multiple
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common     channel, method_sig, args, content = read_timeout(timeout)
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/transport/pyamqplib.py", line 94, in read_timeout
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common     return self.method_reader.read_method()
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common   File "/usr/lib/python2.7/dist-packages/amqplib/client_0_8/method_framing.py", line 221, in read_method
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common     raise m
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common timeout: timed out
>>> 2012-11-18 15:51:29 TRACE nova.openstack.common.rpc.common
>>> 
>>> Thank you,
>>> Ahmed.
>> 

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