br-int: could not open network device

[macchese]

Problem: after deploying a ovn-dedicated-chassis, cannot bind any vif to any openstack network

charm: ovn-dedicated-chassis
channel: 23.09/stable
Rev: 132
ubuntu: 22.04

1. deployed 3 ovn-central units
Unit Workload Agent Machine Public address Ports Message
ovn-central/10* active idle 7/lxd/35 192.168.70.127 6641-6642/tcp Unit is ready (leader: ovnnb_db, ovnsb_db northd: active)
ovn-central/11 active idle 8/lxd/35 192.168.70.128 6641-6642/tcp Unit is ready
ovn-central/12 active idle 3/lxd/37 192.168.70.129 6641-6642/tcp Unit is ready

2. deployed an ovn-dedicated-chassis (alias: ovn-chassis-gw)
App Version Status Scale Charm Channel Rev Exposed Message
ovn-chassis-gw 23.09.0 active 1 ovn-dedicated-chassis 23.09/stable 132 no Unit is ready

Unit Workload Agent Machine Public address Ports Message
ovn-chassis-gw/5* active idle 8 192.168.6.110 Unit is ready

Machine State Address Inst id Base AZ Message
8 started 192.168.6.110 op1 ubuntu@22.04 default Deployed

Integration provider Requirer Interface Type Message
ovn-central:ovsdb ovn-chassis-gw:ovsdb ovsdb regular
vault:certificates ovn-chassis-gw:certificates tls-certificates regular

3. on the chassis-gw node:
root@op1:/var/log/openvswitch# ovs-vsctl show
02e22c0c-e807-4bea-b9b8-216de8f3fa83
    Manager "ptcp:6640:127.0.0.1"
    Bridge br-provider
        fail_mode: standalone
        datapath_type: system
        Port br-provider
            Interface br-provider
                type: internal
        Port patch-provnet-0f6dc796-6023-45ab-af78-ab19fc8bde81-to-br-int
            Interface patch-provnet-0f6dc796-6023-45ab-af78-ab19fc8bde81-to-br-int
                type: patch
                options: {peer=patch-br-int-to-provnet-0f6dc796-6023-45ab-af78-ab19fc8bde81}
        Port bond0
            Interface bond0
                type: system
    Bridge br-int
        fail_mode: secure
        datapath_type: system
        Port patch-br-int-to-provnet-0f6dc796-6023-45ab-af78-ab19fc8bde81
            Interface patch-br-int-to-provnet-0f6dc796-6023-45ab-af78-ab19fc8bde81
                type: patch
                options: {peer=patch-provnet-0f6dc796-6023-45ab-af78-ab19fc8bde81-to-br-int}
        Port tapfa291087-30
            Interface tapfa291087-30
                error: "could not open network device tapfa291087-30 (No such device)"
        Port br-int
            Interface br-int
                type: internal
        Port tap47621598-0b
            Interface tap47621598-0b
                error: "could not open network device tap47621598-0b (No such device)"
    ovs_version: "3.2.1"

of course if I deploy a nova-compute unit on this node, no interface manages to bind to any network I could set-up

[macchese (max-liccardo)]

from ovs-vswitchd.log on the chassis-gw node:

dpif|WARN|system@ovs-system: failed to query port patch-br-int-to-provnet-0f6dc796-6023-45ab-af78-ab19fc8bde81: Invalid argument

[macchese (max-liccardo)]

I resolved removing the interfaces with status :error and switching to nova-compute + ovn-chassis