CP-54444: Use MAC addresses to find out the mgmt interface.

The interface-rename functionality will be deprecated. Consequently, the
names of the network interfaces will not be renamed as eth<N>. To setup
the host installer's own networking, it can not use the name of
management interface in product since the name is returned from
networkd_db command and will not present in the new host installer's
running environment.

The solution is to use MAC address to find the interface. This also
requires the networkd_db change to return the MAC address.

Signed-off-by: Ming Lu <[email protected]>

Author: minglumlu

product.py

@@ -268,9 +268,20 @@ def fetchIfaceInfoFromNetworkdbAsDict(bridge, iface=None):
                 if not d.get('interfaces') and 'parent' in d:
                     p = fetchIfaceInfoFromNetworkdbAsDict(d['parent'])
                     d['interfaces'] = p['interfaces']
+                    d['hwaddrs'] = p.get('hwaddrs')
 
                 results['net-admin-bridge'] = mgmt_iface
-                results['net-admin-interface'] = d.get('interfaces').split(',')[0]
+                hwaddrs = d.get('hwaddrs')
+                if hwaddrs:
+                    net_admin_ifaces = []
+                    nics = [(name, netutil.getHWAddr(name)) for name in netutil.getNetifList()]
+                    for mac in hwaddrs.lower().split(','):
+                        net_admin_ifaces.extend([name for (name, hwaddr) in nics if mac == hwaddr])
+                    if not net_admin_ifaces:
+                        raise SettingsNotAvailable("Could not find any net admin interface")
+                    results['net-admin-interface'] = net_admin_ifaces[0]
+                else:
+                    results['net-admin-interface'] = d.get('interfaces').split(',')[0]
 
                 if_hwaddr = netutil.getHWAddr(results['net-admin-interface'])