Comment 7 for bug 1843557

Ed, to add to comment #6, here's the field scenario:

  neutron-openvswitch:
    charm: cs:neutron-openvswitch
    options:
      use-dvr-snat: True # No network nodes, we need this as True
      enable-local-dhcp-and-metadata: True # No network nodes, we need this as True
      data-port: *data-port
      firewall-driver: openvswitch

  neutron-openvswitch-octavia:
    charm: cs:neutron-openvswitch
    num_units: 0
    options:
      worker-multiplier: *worker-multiplier
      firewall-driver: openvswitch

If use-dvr-snat is not set to True, snat- namespaces wouldn't be scheduled to l3 agents on neutron-openvswitch-octavia units.