[ovs-discuss] OVN: configuration in Neutron DB?

[Numan Siddique]

Adding Daniel and Lucas. Maybe you can also include opendev ML to get
appropriate responses from the OpenStack side.

Please see below for few comments.


On Wed, Jul 29, 2020 at 12:02 PM Tony Liu <tonyliu0592 at hotmail.com> wrote:

> Quick update. I changed the script to create 256 routers first, then set
> each of them as gateway.
> There is no create and set back to back. It seems working fine now.
>
> It would be good someone can clarify my questions. It seems that it's
> not guaranteed that the
> object is ready when client get OK response of creation request. Is this
> expected?
>
>
> Thanks!
>
> Tony
>
> ------------------------------
> *From:* dev <ovs-dev-bounces at openvswitch.org> on behalf of Tony Liu <
> tonyliu0592 at hotmail.com>
> *Sent:* July 28, 2020 10:37 PM
> *To:* ovs-discuss at openvswitch.org <ovs-discuss at openvswitch.org>;
> ovs-dev at openvswitch.org <ovs-dev at openvswitch.org>
> *Subject:* [ovs-dev] OVN: configuration in Neutron DB?
>
> Hi,
>
> In case of integration with OpenStack, for example, when a client requests
> to create a network,
> is this network configuration saved in both Neutron DB and OVN DB, or OVN
> DB only?
>

The neutron API first saves in the neutron db and the neutron OVN mechanism
driver will talk
to the Northbound ovsdb-server and create corresponding OVN logical
resources.


> Also, when a client gets a network from Neutron API, is the configuration
> read from Neutron DB
> or OVN DB?
>

I think its read from the neutron DB.



>
> Other than coding, is there any doc about how Neutron OVN ML2 driver works?
>

You can refer here -
https://docs.openstack.org/neutron/latest/admin/ovn/refarch/refarch.html



>
> I have this script to create 256 routers and set each of them as gateway.
> router()
> {
>     local op=$1
>
>     for c in `seq 0 1 255`; do
>         echo "INFO: $op router-$c..."
>         openstack router $op router-$c
>         if [ "$op" == "create" ]; then
>             openstack router set \
>                 --external-gateway public \
>                 --fixed-ip ip-address=10.6.33.$c \
>                 --disable-snat \
>                 router-$c
>         fi
>     done
> }
> I see lots failures from Neutron log when get/show a router. It seems like
> that, when setting a router,
> the router is not completely ready yet. Is it possible?
>
> After running that script, I see some logical routers in ovn-nb-db don't
> have gw_port_id. And there
> are some duplications. Here is an example. Each of them has unique UUID.
>
> external_ids        : {"neutron:gw_port_id"="",
> "neutron:revision_number"="1", "neutron:router_name"=router-255}
> external_ids        : {"neutron:gw_port_id"="",
> "neutron:revision_number"="1", "neutron:router_name"=router-232}
> external_ids        : {"neutron:gw_port_id"="",
> "neutron:revision_number"="0", "neutron:router_name"=router-158}
> external_ids        : {"neutron:gw_port_id"="",
> "neutron:revision_number"="0", "neutron:router_name"=router-158}
> external_ids        :
> {"neutron:gw_port_id"="e52dda53-c914-4ea7-840b-8632a5770680",
> "neutron:revision_number"="2", "neutron:router_name"=router-158}
>
> I enabled nb-db debug logging and searched, eg. router-158, it only shows
> in a jsonrpc reply message
> including 3 router-158, as the above.
>
> Any clues?
>
>
Maybe Daniel/Lucas can comment.

Thanks
Numan


>
> Thanks!
>
> Tony
>
>
>
> _______________________________________________
> dev mailing list
> dev at openvswitch.org
> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
> _______________________________________________
> discuss mailing list
> discuss at openvswitch.org
> https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openvswitch.org/pipermail/ovs-discuss/attachments/20200729/7694f29a/attachment.html>