ah, I missed the latest update, sorry. you could have just retargeted
the bug instead of creating a new one
** Also affects: neutron
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2077430
Title:
[OVN] Router gateway does not have a chassis defined
Status in neutron:
New
Status in neutron package in Ubuntu:
Invalid
Bug description:
# Problem Description
I have:
- 2 VMs connected to inner-net
- inner-router(with default gateway in outer-net and a port in inner-net)
- outer router(with default gateway in public network and a port in outer-net)
NOTE: I don't have any static routes defined for these routers.
Graphical visualization can be found here:
https://i.ibb.co/gzjd604/Screenshot-from-2024-08-20-13-26-55.png
This scenario works perfectly fine for OVS ML2 driver(VMs have
Internet connectivity), but not for OVN.
I noticed that gateway port for inner-router is DOWN(you can see this
on the above screenshot) which looks quite suspicious.
I applied https://review.opendev.org/c/openstack/neutron/+/907504 but
it didn't solve the problem.
# Further Investigation
I noticed that inner-router's gateway interface does not have a
chassis assigned:
```
router 7a5baad4-657d-42fc-bf35-1b8e4115050e
(neutron-028eb3f7-af0b-4080-87d6-e84b24675b6d) (aka inner-router)
port lrp-a221d264-8fa3-4430-99f7-f453887b96aa
mac: "fa:16:3e:af:b0:ae"
networks: ["10.10.0.60/24"]
port lrp-9ac7815d-75dc-4198-aa94-bfe5ad5431e2
mac: "fa:16:3e:05:30:57"
networks: ["10.0.0.1/24"]
nat 8fca2dfd-2284-4e18-98be-137606f0f0b9
external ip: "10.10.0.60"
logical ip: "10.0.0.0/24"
type: "snat"
```
I fixed it with `ovn-nbctl lrp-set-gateway-chassis
lrp-a221d264-8fa3-4430-99f7-f453887b96aa
efcb326f-f18c-4b65-9da9-260dd0e2e603`.
Now everything looks good. Internet connectivity is working and
neutron gateway port(10.10.0.60) is ACTIVE instead of DOWN.
# How to reproduce the issue
(assuming that you have a test environment with 'public' network
already defined)
```
openstack network create outer-net --external --disable-port-security
openstack subnet create --network outer-net --subnet-range 10.10.0.0/24
outer-subnet
openstack router create outer-router --external-gateway public
openstack router add subnet outer-router outer-subnet
openstack network create inner-net --disable-port-security
openstack subnet create --network inner-net --subnet-range 10.0.0.0/24
inner-subnet
openstack router create --external-gateway outer-net inner-router
openstack router add subnet inner-router inner-subnet
openstack server create \
--network inner-net \
--image 'cirros' \
--flavor 'tempest1' \
vm-inner-1
```
Then, log in to vm-inner-1 and try to ping 8.8.8.8.
For OVS it works, for OVN it doesn't.
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