The policy rule issue now lives here
https://bugs.launchpad.net/neutron/+bug/1759956
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https://bugs.launchpad.net/bugs/1759918
Title:
[dvr] router remove subnet silently fails
To
"cannot be deleted directly via the port API" is by design it seems:
https://bugs.launchpad.net/neutron/+bug/1425504
However, deleting via a subnet should be possible.
Client debug log revealed the issue (I also had a static route
configured to 192.168.200.0/24 on pubrouter via neutron extra
SELECT 1 failure seems to be OK:
http://docs.sqlalchemy.org/en/latest/core/pooling.html#disconnect-handling-pessimistic
So this fails:
remove_router_interface failed (client error): There was a conflict when
trying to complete your request.
remove_router_interface