Add Yang model for SYSTEM_DEFAULTS table

src/sonic-yang-models/setup.py

@@ -104,6 +104,7 @@ def run(self):
                          './yang-models/sonic-extension.yang',
                          './yang-models/sonic-flex_counter.yang',
                          './yang-models/sonic-feature.yang',
+                         './yang-models/sonic-system-defaults.yang',
                          './yang-models/sonic-interface.yang',
                          './yang-models/sonic-kdump.yang',
                          './yang-models/sonic-loopback-interface.yang',
@@ -166,6 +167,7 @@ def run(self):
                          './cvlyang-models/sonic-extension.yang',
                          './cvlyang-models/sonic-flex_counter.yang',
                          './cvlyang-models/sonic-feature.yang',
+                         './cvlyang-models/sonic-system-defaults.yang',
                          './cvlyang-models/sonic-interface.yang',
                          './cvlyang-models/sonic-kdump.yang',
                          './cvlyang-models/sonic-loopback-interface.yang',

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

@@ -1874,6 +1874,11 @@
                      "LAG"
                  ]
              }
+        },
+        "SYSTEM_DEFAULTS": {
+            "tunnel_qos_remap": {
+                "status": "enabled"
+            }
         }
     },
     "SAMPLE_CONFIG_DB_UNKNOWN": {

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

@@ -0,0 +1,10 @@
+{
+    "SYSTEM_DEFAULTS_WITH_CORRECT_VALUES": {
+        "desc": "CONFIG SYSTEM_DEFAULTS TABLE WITH ALL THE CORRECT VALUES"
+    },
+    "SYSTEM_DEFAULTS_WITH_INVALID_STATUS_VALUE" : {
+        "desc": "Referring invalid status value",
+        "eStrKey": "Pattern",
+        "eStr": "does not satisfy"
+    }
+}

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

@@ -0,0 +1,26 @@
+{
+    "SYSTEM_DEFAULTS_WITH_CORRECT_VALUES": {
+        "sonic-system-defaults:sonic-system-defaults": {
+            "sonic-system-defaults:SYSTEM_DEFAULTS": {
+                "SYSTEM_DEFAULTS_LIST": [
+                    {
+                        "name": "tunnel_qos_remap",
+                        "status": "enabled"
+                    }
+                ]
+            }
+        }
+    },
+    "SYSTEM_DEFAULTS_WITH_INVALID_STATUS_VALUE": {
+        "sonic-system-defaults:sonic-system-defaults": {
+            "sonic-system-defaults:SYSTEM_DEFAULTS": {
+                "SYSTEM_DEFAULTS_LIST": [
+                    {
+                        "name": "tunnel_qos_remap",
+                        "status": "invalid_status"
+                    }
+                ]
+            }
+        }
+    }
+}

src/sonic-yang-models/yang-models/sonic-system-defaults.yang

@@ -0,0 +1,41 @@
+module sonic-system-defaults{
+
+    yang-version 1.1;
+
+    namespace "https://github.com/Azure/system-defaults";
+    prefix system-defaults;
+
+    import sonic-types {
+        prefix stypes;
+    }
+
+    description "SYSTEM_DEFAULTS Table yang Module for SONiC";
+
+    container sonic-system-defaults {
+
+        container SYSTEM_DEFAULTS {
+
+            description "system_defaults table in config_db.json";
+
+            list SYSTEM_DEFAULTS_LIST {
+
+                key "name";
+
+                leaf name {
+                    description "feature name in SYSTEM_DEFAULTS table";
+                    type string {
+                        length 1..32;
+                    }
+                }
+
+                leaf status {
+                    description "default status of the feature";
+                    type string {
+                        pattern "enabled|disabled";
+                    }
+                }
+
+            }
+        }
+    }
+}