[202205][yang] Extend device_metadata yang model with rack_mgmt_map (#15140)

* [yang] Extend device_metadata yang model with rack_mgmt_map

* Update doc and sample

Author: yaqiangz

src/sonic-yang-models/doc/Configuration.md

@@ -822,7 +822,8 @@ instance is supported in SONiC.
         "bgp_asn": "65100",
         "deployment_id": "1",
         "type": "ToRRouter",
-        "buffer_model": "traditional"
+        "buffer_model": "traditional",
+        "rack_mgmt_map": "dummy_value"
     }
   }
 }

src/sonic-yang-models/tests/files/sample_config_db.json

@@ -315,7 +315,8 @@
                 "switch_type": "voq",
                 "max_cores": "8",
                 "sub_role": "FrontEnd",
-                "dhcp_server": "disabled"
+                "dhcp_server": "disabled",
+                "rack_mgmt_map": "dummy_value"
             }
         },
         "VLAN": {

src/sonic-yang-models/tests/yang_model_tests/tests/device_metadata.json

@@ -113,6 +113,13 @@
     "DEVICE_METADATA_INVALID_DHCP_SERVER": {
         "desc": "Verifying invalid dhcp_server configuration.",
         "eStrKey": "InvalidValue"
+    },
+    "DEVICE_METADATA_VALID_RACK_MGMT_MAP": {
+        "desc": "Verifying rack_mgmt_map configuration."
+    },
+    "DEVICE_METADATA_INVALID_RACK_MGMT_MAP": {
+        "desc": "Verifying invalid rack_mgmt_map configuration.",
+        "eStr": "Invalid length for the rack mgmt map."
     }
 
 }

src/sonic-yang-models/tests/yang_model_tests/tests_config/device_metadata.json

@@ -311,5 +311,23 @@
                 }
             }
         }
+    },
+    "DEVICE_METADATA_VALID_RACK_MGMT_MAP": {
+        "sonic-device_metadata:sonic-device_metadata": {
+            "sonic-device_metadata:DEVICE_METADATA": {
+                "sonic-device_metadata:localhost": {
+                    "rack_mgmt_map": "dummy_value"
+                }
+            }
+        }
+    },
+    "DEVICE_METADATA_INVALID_RACK_MGMT_MAP": {
+        "sonic-device_metadata:sonic-device_metadata": {
+            "sonic-device_metadata:DEVICE_METADATA": {
+                "sonic-device_metadata:localhost": {
+                    "rack_mgmt_map": "dummy_value-dummy_value-dummy_value-dummy_value-dummy_value-dummy_value-dummy_value-dummy_value-dummy_value-dummy_value-dummy_value-dummy_value-dummy_value"
+                }
+            }
+        }
     }
 }

src/sonic-yang-models/yang-models/sonic-device_metadata.yang

@@ -193,6 +193,15 @@ module sonic-device_metadata {
                     type stypes:admin_mode;
                     description "Indicate whether enable the embedded DHCP server.";
                 }
+
+                leaf rack_mgmt_map {
+                    type string {
+                        length 0..128 {
+                            error-message "Invalid length for the rack mgmt map.";
+                        }
+                    }
+                    description "Information of rack mgmt map.";
+                }
             }
             /* end of container localhost */
         }