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Well, the bug discussion seems to point specifically to this dnsmasq fix:

http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=9380ba70d67db6b69f817d8e318de5ba1e990b12

	Neil


On 01/07/15 07:34, Daniel Comnea wrote:
> Hi,
>
> sorry for no feedback, i've been doing more and more test and after
> enabled the dnsmasq log i found the error which i'm not longer sure if
> is related to having duplicated entries
>
> dnsmasq-dhcp[21231]: 0 DHCPRELEASE(tap8ecf66b6-72) 192.168.111.24
> fa:16:3e:72:04:82 unknown lease
>
> Looking around it seems i'm hitting this bug [1] but not clear from the
> description what was the problem on dnsmasp 2.59 (which comes wiht Fuel 5.1)
>
> Any ideas?
>
> Cheers,
> Dani
>
> [1] https://bugs.launchpad.net/neutron/+bug/1271344
>
> On Wed, Jun 10, 2015 at 7:13 AM, Daniel Comnea <comnea.dani at gmail.com
> <mailto:comnea.dani at gmail.com>> wrote:
>
>     Thanks a bunch Kevin!
>
>     I'll try this patch and report back.
>
>     Dani
>
>
>     On Tue, Jun 9, 2015 at 2:50 AM, Kevin Benton <blak111 at gmail.com
>     <mailto:blak111 at gmail.com>> wrote:
>
>         Hi Daniel,
>
>         I'm concerned that we are encountered out-of-order port events
>         on the DHCP agent side so the delete message is processed before
>         the create message. Would you be willing to apply a small patch
>         to your dhcp agent to see if it fixes the issue?
>
>         If it does fix the issue, you should see occasional warnings in
>         the DHCP agent log that show "Received message for port that was
>         already deleted". If it doesn't fix the issue, we may be losing
>         the delete event entirely. If that's the case, it would be great
>         if you can enable debuging on the agent and upload a log of a
>         run when it happens.
>
>         Cheers,
>         Kevin Benton
>
>         Here is the patch:
>
>         diff --git a/neutron/agent/dhcp_agent.py
>         b/neutron/agent/dhcp_agent.py
>         index 71c9709..9b9b637 100644
>         --- a/neutron/agent/dhcp_agent.py
>         +++ b/neutron/agent/dhcp_agent.py
>         @@ -71,6 +71,7 @@ class DhcpAgent(manager.Manager):
>                   self.needs_resync = False
>                   self.conf = cfg.CONF
>                   self.cache = NetworkCache()
>         +        self.deleted_ports = set()
>                   self.root_helper = config.get_root_helper(self.conf)
>                   self.dhcp_driver_cls =
>         importutils.import_class(self.conf.dhcp_driver)
>                   ctx = context.get_admin_context_without_session()
>         @@ -151,6 +152,7 @@ class DhcpAgent(manager.Manager):
>                   LOG.info(_('Synchronizing state'))
>                   pool = eventlet.GreenPool(cfg.CONF.num_sync_threads)
>                   known_network_ids = set(self.cache.get_network_ids())
>         +        self.deleted_ports = set()
>
>                   try:
>                       active_networks =
>         self.plugin_rpc.get_active_networks_info()
>         @@ -302,6 +304,10 @@ class DhcpAgent(manager.Manager):
>               @utils.synchronized('dhcp-agent')
>               def port_update_end(self, context, payload):
>                   """Handle the port.update.end notification event."""
>         +        if payload['port']['id'] in self.deleted_ports:
>         +            LOG.warning(_("Received message for port that was "
>         +                          "already deleted: %s"),
>         payload['port']['id'])
>         +            return
>                   updated_port = dhcp.DictModel(payload['port'])
>                   network =
>         self.cache.get_network_by_id(updated_port.network_id)
>                   if network:
>         @@ -315,6 +321,7 @@ class DhcpAgent(manager.Manager):
>               def port_delete_end(self, context, payload):
>                   """Handle the port.delete.end notification event."""
>                   port = self.cache.get_port_by_id(payload['port_id'])
>         +        self.deleted_ports.add(payload['port_id'])
>                   if port:
>                       network =
>         self.cache.get_network_by_id(port.network_id)
>                       self.cache.remove_port(port)
>
>
>
>
>
>
>
>
>         On Mon, Jun 8, 2015 at 8:26 AM, Daniel Comnea
>         <comnea.dani at gmail.com <mailto:comnea.dani at gmail.com>> wrote:
>
>             Any help, ideas please?
>
>             Thx,
>             Dani
>
>             On Mon, Jun 8, 2015 at 9:25 AM, Daniel Comnea
>             <comnea.dani at gmail.com <mailto:comnea.dani at gmail.com>> wrote:
>
>                 + Operators
>
>                 Much thanks in advance,
>                 Dani
>
>
>
>
>                 On Sun, Jun 7, 2015 at 6:31 PM, Daniel Comnea
>                 <comnea.dani at gmail.com <mailto:comnea.dani at gmail.com>>
>                 wrote:
>
>                     Hi all,
>
>                     I'm running IceHouse (build using Fuel 5.1.1) on
>                     Ubuntu where dnsmask version 2.59-4.
>                     I have a very basic network layout where i have a
>                     private net which has 2 subnets
>
>                       2fb7de9d-d6df-481f-acca-2f7860cffa60 |
>                     private-net                                       |
>                     e79c3477-d3e5-471c-a728-8d881cf31bee
>                     192.168.110.0/24 <http://192.168.110.0/24> |
>                     |
>                     |
>                                           |
>                     f48c3223-8507-455c-9c13-8b727ea5f441
>                     192.168.111.0/24 <http://192.168.111.0/24> |
>
>                     and i'm creating VMs via HEAT.
>                     What is happening is that sometimes i get duplicated
>                     entries in [1] and because of that the VM which was
>                     spun up doesn't get an ip.
>                     The Dnsmask processes are running okay [2] and i
>                     can't see anything special/ wrong in it.
>
>                     Any idea why this is happening? Or are you aware of
>                     any bugs around this area? Do you see a problems
>                     with having 2 subnets mapped to 1 private-net?
>
>
>
>                     Thanks,
>                     Dani
>
>                     [1]
>                     /var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/addn_hosts
>
>                     [2]
>
>                     nobody    5664     1  0 Jun02 ?        00:00:08
>                     dnsmasq --no-hosts --no-resolv --strict-order
>                     --bind-interfaces --interface=tapc9164734-0c
>                     --except-interface=lo
>                     --pid-file=/var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/pid
>                     --dhcp-hostsfile=/var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/host
>                     --addn-hosts=/var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/addn_hosts
>                     --dhcp-optsfile=/var/lib/neutron/dhcp/2fb7de9d-d6df-481f-acca-2f7860cffa60/opts
>                     --leasefile-ro --dhcp-authoritative
>                     --dhcp-range=set:tag0,192.168.110.0,static,86400s
>                     --dhcp-range=set:tag1,192.168.111.0,static,86400s
>                     --dhcp-lease-max=512 --conf-file= --server=10.0.0.31
>                     --server=10.0.0.32 --domain=openstacklocal
>
>
>
>
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>
>
>
>
>         --
>         Kevin Benton
>
>
>
>
>
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