Manila-share in error for missing br-int

[Giuseppe Petralia]

This is on yoga/stable, manila rev. 240, manila-generic rev 45

ubuntu@pc6a-infra:~$ juju status manila --relations
Model Controller Cloud/Region Version SLA Timestamp
openstack foundations-maas maas_cloud 3.6.3 unsupported 11:53:15Z

App Version Status Scale Charm Channel Rev Exposed Message
hacluster-manila 2.0.3 active 3 hacluster 2.4/stable 131 no Unit is ready and clustered
manila 14.1.1 active 3 manila yoga/stable 240 no Unit is ready
manila-generic 14.1.1 active 3 manila-generic yoga/stable 45 no Unit is ready
manila-mysql-router 8.0.41 active 3 mysql-router 8.0/stable 257 no Unit is ready
public-policy-routing active 3 advanced-routing latest/stable 31 no Unit is ready

Unit Workload Agent Machine Public address Ports Message
manila/0* active idle 0/lxd/13 10.17.2.36 8786/tcp Unit is ready
  hacluster-manila/0* active idle 10.17.2.36 Unit is ready and clustered
  manila-generic/0* active idle 10.17.2.36 Unit is ready
  manila-mysql-router/5 active idle 10.17.2.36 Unit is ready
  public-policy-routing/47 active idle 10.17.2.36 Unit is ready
manila/1 active idle 1/lxd/19 10.17.2.32 8786/tcp Unit is ready
  hacluster-manila/2 active idle 10.17.2.32 Unit is ready and clustered
  manila-generic/2 active idle 10.17.2.32 Unit is ready
  manila-mysql-router/6 active idle 10.17.2.32 Unit is ready
  public-policy-routing/49 active idle 10.17.2.32 Unit is ready
manila/2 active idle 2/lxd/17 10.17.2.34 8786/tcp Unit is ready
  hacluster-manila/1 active idle 10.17.2.34 Unit is ready and clustered
  manila-generic/1 active idle 10.17.2.34 Unit is ready
  manila-mysql-router/3* active idle 10.17.2.34 Unit is ready
  public-policy-routing/48 active idle 10.17.2.34 Unit is ready

Machine State Address Inst id Base AZ Message
0 started 10.17.2.125 pc6a-rb3-n1 ubuntu@22.04 zone1 Deployed
0/lxd/13 started 10.17.2.36 juju-5addf7-0-lxd-13 ubuntu@20.04 zone1 Container started
1 started 10.17.2.124 pc6a-rb3-n3 ubuntu@22.04 zone3 Deployed
1/lxd/19 started 10.17.2.32 juju-5addf7-1-lxd-19 ubuntu@20.04 zone3 Container started
2 started 10.17.2.129 pc6a-rb3-n4 ubuntu@22.04 zone1 Deployed
2/lxd/17 started 10.17.2.34 juju-5addf7-2-lxd-17 ubuntu@20.04 zone1 Container started

Manila-share is constantly in error loop with

```
2025-03-13 11:50:36.193 378627 INFO manila.service [-] Starting manila-share node (version 14.1.1)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service [req-8a997ca8-8142-44ba-83aa-ee89e8175d92 - - - - -] Error starting thread.: manila.exception.BridgeDoesNotExist: Bridge br-int does not exist.
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service Traceback (most recent call last):
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/oslo_service/service.py", line 806, in run_service
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service service.start()
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/service.py", line 137, in start
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service self.manager.init_host()
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/share/manager.py", line 220, in wrapped
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service return f(self, *args, **kwargs)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/share/manager.py", line 359, in init_host
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service (self.driver.service_instance_manager.network_helper.
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/oslo_concurrency/lockutils.py", line 391, in inner
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service return f(*args, **kwargs)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/share/drivers/service_instance.py", line 246, in network_helper
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service self._network_helper.setup_connectivity_with_service_instances()
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/share/drivers/service_instance.py", line 975, in setup_connectivity_with_service_instances
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service self._plug_interface_in_host(interface_name, device, port)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/oslo_concurrency/lockutils.py", line 391, in inner
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service return f(*args, **kwargs)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/share/drivers/service_instance.py", line 995, in _plug_interface_in_host
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service self.vif_driver.plug(interface_name, port['id'], port['mac_address'])
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/network/linux/interface.py", line 51, in wrapped_func
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service return source_func(self, *args, **kwargs)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/oslo_concurrency/lockutils.py", line 391, in inner
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service return f(*args, **kwargs)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/network/linux/interface.py", line 49, in source_func
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service return f(self, *args, **kwargs)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/network/linux/interface.py", line 188, in plug
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service self.check_bridge_exists(bridge)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/manila/network/linux/interface.py", line 130, in check_bridge_exists
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service raise exception.BridgeDoesNotExist(bridge=bridge)
2025-03-13 11:50:36.705 378627 ERROR oslo_service.service manila.exception.BridgeDoesNotExist: Bridge br-int does not exist.
```

Manually installing openvswitch-switch and running `ovs-vsctl add br-int` makes the error stopping

But I am not sure if I need any additional bridge and any connection to an interface on the lxd.

It seems that manila needs a similar configuration like Octavia when trying to work with Manila Generic driver

[Giuseppe Petralia (peppepetra)]

I think that the charm needs some relations similar to the octavia charm to be able to connect to the VMs on the overlay network:

manila-ovn-chassis:ovsdb-subordinate manila-generic:ovsdb-subordinate
ovn-central:ovsdb-cms manila-generic:ovsdb-cms