[minigraph] Add downstreamsubrole parsing to 20911 minigraph.py (#7193)

src/sonic-config-engine/minigraph.py

@@ -602,6 +602,7 @@ def parse_meta(meta, hname):
     deployment_id = None
     region = None
     cloudtype = None
+    downstream_subrole = None
     device_metas = meta.find(str(QName(ns, "Devices")))
     for device in device_metas.findall(str(QName(ns1, "DeviceMetadata"))):
         if device.find(str(QName(ns1, "Name"))).text.lower() == hname.lower():
@@ -628,7 +629,9 @@ def parse_meta(meta, hname):
                     region = value
                 elif name == "CloudType":
                     cloudtype = value
-    return syslog_servers, dhcp_servers, ntp_servers, tacacs_servers, mgmt_routes, erspan_dst, deployment_id, region, cloudtype
+                elif name == "DownStreamSubRole":
+                    downstream_subrole = value
+    return syslog_servers, dhcp_servers, ntp_servers, tacacs_servers, mgmt_routes, erspan_dst, deployment_id, region, cloudtype, downstream_subrole
 
 
 def parse_linkmeta(meta, hname):
@@ -881,6 +884,7 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None):
     neighbors = None
     devices = None
     sub_role = None
+    downstream_subrole = None
     docker_routing_config_mode = "separated"
     port_speeds_default = {}
     port_speed_png = {}
@@ -937,7 +941,7 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None):
             elif child.tag == str(QName(ns, "UngDec")):
                 (u_neighbors, u_devices, _, _, _, _, _, _) = parse_png(child, hostname)
             elif child.tag == str(QName(ns, "MetadataDeclaration")):
-                (syslog_servers, dhcp_servers, ntp_servers, tacacs_servers, mgmt_routes, erspan_dst, deployment_id, region, cloudtype) = parse_meta(child, hostname)
+                (syslog_servers, dhcp_servers, ntp_servers, tacacs_servers, mgmt_routes, erspan_dst, deployment_id, region, cloudtype, downstream_subrole) = parse_meta(child, hostname)
             elif child.tag == str(QName(ns, "LinkMetadataDeclaration")):
                 linkmetas = parse_linkmeta(child, hostname)
             elif child.tag == str(QName(ns, "DeviceInfos")):
@@ -985,6 +989,10 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None):
         current_device['sub_role'] = sub_role
         results['DEVICE_METADATA']['localhost']['sub_role'] =  sub_role
         results['DEVICE_METADATA']['localhost']['asic_name'] =  asic_name
+
+    if downstream_subrole is not None:
+        results['DEVICE_METADATA']['localhost']['downstream_subrole'] = downstream_subrole
+
     results['BGP_NEIGHBOR'] = bgp_sessions
     results['BGP_MONITORS'] = bgp_monitors
     results['BGP_PEER_RANGE'] = bgp_peers_with_range

src/sonic-config-engine/tests/simple-sample-graph-metadata.xml

@@ -253,6 +253,11 @@
      <a:Reference i:nil="true"/>
      <a:Value>10.0.10.7;10.0.10.8</a:Value>
     </a:DeviceProperty>
+    <a:DeviceProperty>
+     <a:Name>DownStreamSubRole</a:Name>
+     <a:Reference i:nil="true"/>
+     <a:Value>downstream_subrole_y</a:Value>
+    </a:DeviceProperty>
   </a:Properties>
   </a:DeviceMetadata>
  </Devices>

src/sonic-config-engine/tests/test_cfggen.py

@@ -78,6 +78,11 @@ def test_minigraph_cloudtype(self):
         output = self.run_script(argument)
         self.assertEqual(output.strip(), 'Public')
 
+    def test_minigraph_downstream_subrole(self):
+        argument = '-v "DEVICE_METADATA[\'localhost\'][\'downstream_subrole\']" -m "' + self.sample_graph_metadata + '"'
+        output = self.run_script(argument)
+        self.assertEqual(output.strip(), 'downstream_subrole_y')
+
     def test_print_data(self):
         argument = '-m "' + self.sample_graph + '" --print-data'
         output = self.run_script(argument)