[Openstack-operators] [Openstack] Strange: lost physical connectivity to compute hosts when using native (ryu) openflow interface
gustavo.randich at gmail.com
Fri Apr 28 16:04:55 UTC 2017
Hi Kevin, we are using the default listen address of loopback interface:
# grep -r of_listen_address /etc/neutron
tcp/127.0.0.1:6640 -> ovsdb-server /etc/openvswitch/conf.db
-vconsole:emer -vsyslog:err -vfile:info
--pidfile=/var/run/openvswitch/ovsdb-server.pid --detach --monitor
On Fri, Apr 28, 2017 at 5:00 AM, Kevin Benton <kevin at benton.pub> wrote:
> Are you using an of_listen_address value of an interface being brought
> On Apr 25, 2017 17:34, "Gustavo Randich" <gustavo.randich at gmail.com>
>> (using Mitaka / Ubuntu 16 / Neutron DVR / OVS / VXLAN / l2_population)
>> This sounds very strange (to me): recently, after a switch outage, we
>> lost connectivity to all our Mitaka hosts. We had to enter via iLO host by
>> host and restart networking service to regain access. Then restart
>> neutron-openvswitch-agent to regain access to VMs.
>> At first glance we thought it was a problem with the NIC linux driver of
>> the hosts not detecting link state correctly.
>> Then we reproduced the issue simply bringing down physical interfaces for
>> around 5 minutes, then up again. Same issue.
>> And then.... we found that if instead of using native (ryu) OpenFlow
>> interface in Neutron Openvswitch we used ovs-ofctl, the problem disappears.
>> Any clue?
>> Thanks in advance.
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