Switch to ovslib

[Armando Migliaccio]

One L2GW implementation relies on hardware vtep schema and for that agents need to talk to OVSDB. At the time this was initially developed considerations were made in relation to what to use: the python ovsdb library or straight ovsdb over a tcp socket. The latter was chosen and rationale was documented in [1].

We should reassess whether these considerations are still valid, and if they are not, switch to the ovsdb library itself that will allow us to reduce the l2gw code footprint.

 [1] https://raw.githubusercontent.com/openstack/networking-l2gw/master/networking_l2gw/services/l2gateway/agent/ovsdb/README.rst
 [2] https://review.openstack.org/#/c/208524/

[Maruti Kamat (marutik)]

Ofer, the missing piece (Manager table support) in Python ovs lib is blocking us from switching to Python OVS library.
Please let us know if you have any update.

[Maruti Kamat (marutik)]

Ofer, just wanted to know is there a patch you are going to submit on this?

[Ofer Ben-Yacov (ofer-benyacov)]

not ready yet.
This is a lot of code and will take some time.

[Ricardo Noriega (rnoriega-b)]

Hi Ofer,

Can we close this bug?

I saw this patch already merged: https://review.openstack.org/#/c/340974/ but not sure if there are more patches to come.