mgr/cephadm: Add check for virtual_interface_networks

Added an additional look up for if a match with the ceph networks is not found it will check the virtual_interface_networks list from the config that will enable matching to those networks, enabling dummy IP usage as described in the docs: https://docs.ceph.com/en/reef/cephadm/services/rgw/#selecting-network-interfaces-for-the-virtual-ip.

Fixes: https://tracker.ceph.com/issues/66874
Signed-off-by: Bradley Bishop <[email protected]>

Author: bishopbm1

src/pybind/mgr/cephadm/serve.py

@@ -802,6 +802,14 @@ def has_interface_for_vip(host: str, sspec: ServiceSpec) -> bool:
                         )
                         found = True
                         break
+                if not found and spec.virtual_interface_networks:
+                    for subnet, ifaces in self.mgr.cache.networks.get(host, {}).items():
+                        if subnet in spec.virtual_interface_networks:
+                            logger.debug(
+                                f'{subnet} found in virtual_interface_networks list {list(spec.virtual_interface_networks)}'
+                            )
+                            found = True
+                            break
                 if not found:
                     self.log.info(
                         f"Filtered out host {host}: Host has no interface available for VIP: {vip}"