[Openstack-operators] [neutron] heads up to long time ovs users...

IWAMOTO Toshihiro iwamoto at valinux.co.jp
Fri Sep 21 01:36:56 UTC 2018

The neutron team is finally removing the ovs-ofctl option.


The ovs-ofctl of_interface option wasn't default since Newton and was
deprecated in Pike.

So, if you are a long time ovs-agent user and upgrading to a new
coming release, you must switch from the ovs-ofctl implementation to
the native implementation and are affected by the following issue.


The loss of communication mentioned in this bug report would be a few
seconds to a few minutes depending on the number of network
interfaces.  It happens when an ovs-agent is restarted with the new
of_interface (so only once during the upgrade) and persists until the
network interfaces are set up.

Please speak up if you cannot tolerate this during upgrades.

IIUC, this bug is unfixable and I'd like to move forward as
maintaining two of_interface implementation is a burden for the
neutron team.

IWAMOTO Toshihiro

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