[YANG] Create YANG Model for Console (#11806)

How I did it
Create YANG Model for SONiC console related features.

How to verify it
Add tests

Signed-off-by: Jing Kan jika@microsoft.com

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

@@ -19,6 +19,7 @@ Table of Contents
          * [Buffer port egress profile list](#buffer-port-egress-profile-list)  
          * [Cable length](#cable-length)  
          * [COPP_TABLE](#copp_table)  
+         * [Console](#console)  
          * [CRM](#crm)  
          * [Data Plane L3 Interfaces](#data-plane-l3-interfaces)  
          * [DEFAULT_LOSSLESS_BUFFER_PARAMETER](#DEFAULT_LOSSLESS_BUFFER_PARAMETER)  
@@ -687,6 +688,29 @@ This kind of profiles will be handled by buffer manager and won't be applied to
 }
 ```
 
+### Console
+
+```
+{
+"CONSOLE_PORT": {
+    "1": {
+        "baud_rate": "115200",
+        "flow_control": "0",
+        "remote_device": "host-1"
+    },
+    "2": {
+        "baud_rate": "9600",
+        "flow_control": "1"
+    }
+  },
+"CONSOLE_SWITCH": {
+    "console_mgmt": {
+        "enabled": "yes"
+    }
+  }
+}
+```
+
 ### CRM
 
 ```

src/sonic-yang-models/setup.py

@@ -98,6 +98,7 @@ setup(
                          './yang-models/sonic-buffer-queue.yang',
                          './yang-models/sonic-cable-length.yang',
                          './yang-models/sonic-copp.yang',
+                         './yang-models/sonic-console.yang',
                          './yang-models/sonic-crm.yang',
                          './yang-models/sonic-default-lossless-buffer-parameter.yang',
                          './yang-models/sonic-device_metadata.yang',

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

@@ -1964,6 +1964,23 @@
                 "default_dynamic_th": "0",
                 "over_subscribe_ratio": "0"
             }
+        },
+
+        "CONSOLE_PORT": {
+            "1": {
+                "baud_rate": "115200",
+                "flow_control": "0",
+                "remote_device": "host-1"
+            },
+            "2": {
+                "baud_rate": "9600",
+                "flow_control": "1"
+            }
+        },
+        "CONSOLE_SWITCH": {
+            "console_mgmt": {
+                "enabled": "yes"
+            }
         }
     },
     "SAMPLE_CONFIG_DB_UNKNOWN": {

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

@@ -0,0 +1,40 @@
+{
+    "CONSOLE_DISABLED": {
+        "desc": "Verifying CONSOLE_SWITCH configuration."
+    },
+    "CONSOLE_DEFAULT_CONSOLE_MGMT": {
+        "desc": "CONSOLE_SWITCH default value for console_mgmt enabled field.",
+        "eStrKey": "Verify",
+        "verify": {
+            "xpath": "/sonic-console:sonic-console/CONSOLE_SWITCH/console_mgmt/enabled",
+            "key": "sonic-console:enabled",
+            "value": "no"
+        }
+    },
+    "CONSOLE_DISABLED_INCORRECT_PATTERN": {
+        "desc": "CONSOLE_SWITCH configuration pattern failure.",
+        "eStrKey": "Pattern"
+    },
+    "CONSOLE_PORT_DEFAULT_FLOW_CONTROL": {
+        "desc": "CONSOLE_PORT default value for flow_control field.",
+        "eStrKey": "Verify",
+        "verify": {
+            "xpath": "/sonic-console:sonic-console/CONSOLE_PORT/CONSOLE_PORT_LIST[name='1']/flow_control",
+            "key": "sonic-console:flow_control",
+            "value": "0"
+        }
+    },
+    "CONSOLE_PORT_INVALID_NAME": {
+        "desc": "CONSOLE_PORT invalid name failure.",
+        "eStrKey": "InvalidValue",
+        "eStr": ["name"]
+    },
+    "CONSOLE_PORT_INVALID_BAUD": {
+        "desc": "CONSOLE_PORT invalid baud failure.",
+        "eStrKey": "InvalidValue",
+        "eStr": ["baud"]
+    },
+    "CONSOLE_PORT_VALID": {
+        "desc": "Verifying CONSOLE_PORT configuration no failure."
+    }
+}

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

@@ -0,0 +1,88 @@
+{
+    "CONSOLE_DISABLED": {
+        "sonic-console:sonic-console": {
+            "sonic-console:CONSOLE_SWITCH": {
+                "sonic-console:console_mgmt": {
+                    "enabled": "no"
+                }
+            }
+        }
+    },
+    "CONSOLE_DEFAULT_CONSOLE_MGMT": {
+        "sonic-console:sonic-console": {
+            "sonic-console:CONSOLE_SWITCH": {
+                "sonic-console:console_mgmt": {
+                }
+            }
+        }
+    },
+    "CONSOLE_DISABLED_INCORRECT_PATTERN": {
+        "sonic-console:sonic-console": {
+            "sonic-console:CONSOLE_SWITCH": {
+                "sonic-console:console_mgmt": {
+                    "enabled": "false"
+                }
+            }
+        }
+    },
+    "CONSOLE_PORT_DEFAULT_FLOW_CONTROL": {
+        "sonic-console:sonic-console": {
+            "sonic-console:CONSOLE_PORT": {
+                "CONSOLE_PORT_LIST": [
+                    {
+                        "name": "1",
+                        "baud_rate": "9600"
+                    }
+                ]
+            }
+        }
+    },
+    "CONSOLE_PORT_INVALID_NAME": {
+        "sonic-console:sonic-console": {
+            "sonic-console:CONSOLE_PORT": {
+                "CONSOLE_PORT_LIST": [
+                    {
+                        "name": "invalid",
+                        "baud_rate": "9600"
+                    }
+                ]
+            }
+        }
+    },
+    "CONSOLE_PORT_INVALID_BAUD": {
+        "sonic-console:sonic-console": {
+            "sonic-console:CONSOLE_PORT": {
+                "CONSOLE_PORT_LIST": [
+                    {
+                        "name": "1",
+                        "baud_rate": "invalid"
+                    }
+                ]
+            }
+        }
+    },
+    "CONSOLE_PORT_VALID": {
+        "sonic-console:sonic-console": {
+            "sonic-console:CONSOLE_PORT": {
+                "CONSOLE_PORT_LIST": [
+                    {
+                        "name": "1",
+                        "baud_rate": "9600",
+                        "flow_control": "1",
+                        "remote_device": "remote_host_1"
+                    },
+                    {
+                        "name": "2",
+                        "baud_rate": "9600",
+                        "flow_control": "0",
+                        "remote_device": "remote_host_2"
+                    },
+                    {
+                        "name": "3",
+                        "baud_rate": "9600"
+                    }
+                ]
+            }
+        }
+    }
+}

src/sonic-yang-models/yang-models/sonic-console.yang

@@ -0,0 +1,76 @@
+module sonic-console {
+    yang-version 1.1;
+    namespace "http://github.com/Azure/sonic-console";
+    prefix console;
+
+    import sonic-types {
+        prefix stypes;
+    }
+
+    description "SONiC CONSOLE";
+
+    revision 2022-08-22 {
+        description "First Revision";
+    }
+
+    typedef console-mgmt-enabled {
+        description "configuration to set if console switch is enabled or not";
+        type string {
+            pattern "yes|no";
+        }
+    }
+
+    typedef console-flow-control {
+        description "configuration to set if enable flow control on a console port";
+        type string {
+            pattern "0|1";
+        }
+    }
+
+    container sonic-console {
+        container CONSOLE_PORT {
+            description "CONSOLE_PORT part of config_db.json";
+
+            list CONSOLE_PORT_LIST {
+                key "name";
+                
+                leaf name {
+                    description "Configure console port name";
+                    type uint16;
+                }
+
+                leaf baud_rate {
+                    description "Configure baud rate";
+                    type uint32;
+                }
+
+                leaf flow_control {
+                    description "Configure if enable/disable flow control";
+                    type console-flow-control;
+                    default "0";
+                }
+
+                leaf remote_device {
+                    description "Configure the remote device name";
+                    type stypes:hostname;
+                }
+            }
+
+        } /* end of container CONSOLE_PORT */
+
+        container CONSOLE_SWITCH {
+            description "CONSOLE_SWITCH part of config_db.json";
+
+            container console_mgmt {
+                leaf enabled {
+                    description "This configuration indicate if enable console management feature on SONiC";
+                    type console-mgmt-enabled;
+                    default "no";
+                }
+            }
+
+        } /* end of container CONSOLE_SWITCH */
+
+    } /* end of top level container */
+
+} /* end of module sonic-console */