Hello Everyone, We are currently working on a patch set to add/delete router interfaces in the OVN plugin. This patch was initially worked on by Gal Sagie (https://review.openstack.org/#/c/206919/) and we took over to take it completion.
There are bunch of gate tests that are failing as a result of this patch and we have fixed a few of them. What remain to be fixed are the following. test_dhcp6_stateless_from_os test_dualnet_multi_prefix_dhcpv6_stateless test_dualnet_multi_prefix_slaac test_multi_prefix_dhcpv6_stateless test_multi_prefix_slaac test_slaac_from_os The reason for the failure of these tests has got to do with the way OVN handles router interface. In openstack multiple subnets can be added to a network and for each of these subnets the router interface has to be explicitly configured. So for a given network there can be multiple router interfaces. With the current NB schema in OVN there can be only 1 router interface for a network. Most of the above test cases try to add multiple subnets in a network, configure router interfaces, do some connectivity tests and then clean up. When a router interface is configured for the first subnet all the DB tables are populated correctly, but when the router interface for the second subnet is created, it results in deletion of the router interface of the first subnet. So every time a router interface is configured for a subnet, it results in deletion of the previous subnets router interface, provided both the subnets belong to the same network. The test cases fail when they are trying to remove the router interface that has already been deleted from OVN NB. We considered an option to see if we can have a router port in "Logical Switch" table refer to multiple rows in the "Logical Router Port" table, but the router port in the schema is defined as a hard reference to uuid of the "Logical Router Port" table. Given that we want to demo l3 in Tokyo, should we consider disabling these tests until we figure out how to fix the issue ? Should i start a separate thread on ovs-dev to follow up on the issue? Thanks, Chandra
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