[Yang model] add Restapi yang file (#12287)

* add Restapi Yang model

Author: prsunny

src/sonic-restapi

@@ -46,6 +46,7 @@ Table of Contents
          * [Scheduler](#scheduler)  
          * [Port QoS Map](#port-qos-map)  
          * [Queue](#queue)  
+         * [Restapi](#restapi)  
          * [Tacplus Server](#tacplus-server)    
          * [TC to Priority group map](#tc-to-priority-group-map)  
          * [TC to Queue map](#tc-to-queue-map)    
@@ -1411,6 +1412,18 @@ name as object key and member list as attribute.
 }
 ```
 
+### Restapi
+```
+{
+"RESTAPI": {
+    "certs": {
+        "ca_crt": "/etc/sonic/credentials/ame_root.pem",
+        "server_key": "/etc/sonic/credentials/restapiserver.key",
+        "server_crt": "/etc/sonic/credentials/restapiserver.crt",
+        "client_crt_cname": "client.sonic.net"
+    }
+}
+```
 
 ### Tacplus Server
 

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

@@ -148,6 +148,7 @@ def run(self):
                          './yang-models/sonic-scheduler.yang',
                          './yang-models/sonic-wred-profile.yang',
                          './yang-models/sonic-queue.yang',
+                         './yang-models/sonic-restapi.yang',
                          './yang-models/sonic-dscp-fc-map.yang',
                          './yang-models/sonic-exp-fc-map.yang',
                          './yang-models/sonic-dscp-tc-map.yang',

src/sonic-yang-models/setup.py

@@ -1118,6 +1118,14 @@
 		"port": "50051"
 	    }
         },
+        "RESTAPI": {
+            "certs": {
+                "ca_crt": "/etc/sonic/credentials/ame_root.pem",
+                "server_key": "/etc/sonic/credentials/restapiserver.key",
+                "server_crt": "/etc/sonic/credentials/restapiserver.crt",
+                "client_crt_cname": "client.sonic.net"
+            }
+         },
         "FLEX_COUNTER_TABLE": {
             "PFCWD": {
                 "FLEX_COUNTER_STATUS": "enable"

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

@@ -0,0 +1,9 @@
+{
+    "RESTAPI_TABLE_WITH_INCORRECT_CERT": {
+        "desc": "RESTAPI TABLE_WITH_INCORRECT_CERT failure.",
+        "eStr": ["server_crt"]
+    },
+    "RESTAPI_TABLE_WITH_VALID_CONFIG": {
+        "desc": "RESTAPI TABLE WITH VALID CONFIG."
+    }
+}

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

@@ -0,0 +1,26 @@
+{
+    "RESTAPI_TABLE_WITH_INCORRECT_CERT": {
+        "sonic-restapi:sonic-restapi": {
+            "sonic-restapi:RESTAPI": {
+                "certs": {
+                    "ca_crt": "abcd.config",
+                    "server_crt": "a/b/c",
+                    "server_key": "123",
+                    "client_crt_cname": "client"
+                }
+            }
+        }
+    },
+    "RESTAPI_TABLE_WITH_VALID_CONFIG": {
+        "sonic-restapi:sonic-restapi": {
+            "sonic-restapi:RESTAPI": {
+                "certs": {
+                    "ca_crt": "/etc/sonic/credentials/ame_root.pem",
+                    "server_crt": "/etc/sonic/credentials/restapiserver.crt",
+                    "server_key": "/etc/sonic/credentials/restapiserver.key",
+                    "client_crt_cname": "client.sonic.net"
+                }
+            }
+        }
+    }
+}

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

@@ -0,0 +1,63 @@
+module sonic-restapi {
+
+    yang-version 1.1;
+
+    namespace "https://github.com/Azure/sonic-restapi";
+    prefix restapi;
+
+    import ietf-inet-types {
+        prefix inet;
+    }
+
+    organization
+        "SONiC";
+
+    contact
+        "SONiC";
+
+    description "RESTAPI YANG Module for SONiC OS";
+
+    revision 2022-10-05 {
+        description "First Revision";
+    }
+
+    container sonic-restapi {
+
+        container RESTAPI {
+
+            description "RESTAPI TABLE part of config_db.json";
+
+            container certs {
+
+                leaf ca_crt {
+                    type string {
+                        pattern '(/[a-zA-Z0-9_-]+)*/([a-zA-Z0-9_-]+).pem';
+                    }
+                    description "Local path for ca_crt.";
+                }
+
+                leaf server_crt {
+                    type string {
+                        pattern '(/[a-zA-Z0-9_-]+)*/([a-zA-Z0-9_-]+).crt';
+                    }
+                    description "Local path for server_crt.";
+                }
+
+                leaf client_crt_cname {
+                    type string {
+                        pattern '(/[a-zA-Z0-9_-.]+)*/([a-zA-Z0-9_-.]+)./[a-z]{3}';
+                    }
+                    description "Client cert name.";
+                }
+
+                leaf server_key {
+                    type string {
+                        pattern '(/[a-zA-Z0-9_-]+)*/([a-zA-Z0-9_-]+).key';
+                    }
+                    description "Local path for server_key.";
+                }
+
+            }
+        }
+    }
+}