Kdump Remote ssh yang enhancements (#19540)

Why I did it
Added support for Kdump remote SSH feature in existing sonic-kdump.yang

How I did it
Modified sonic-kdump.yang file to add support for ssh , ssh_connection and ssh_path strings

How to verify it
Updated yang model with required changes for feature

Author: ridahanif96

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

@@ -1370,7 +1370,10 @@ The configuration is applied globally for each ECMP and LAG on a switch.
         "config": {
             "enabled": "true",
             "num_dumps": "3",
-            "memory": "0M-2G:256M,2G-4G:256M,4G-8G:384M,8G-:448M"
+            "memory": "0M-2G:256M,2G-4G:256M,4G-8G:384M,8G-:448M",
+            "remote": "true",
+            "ssh_string": "username@ipaddress",
+            "ssh_path": "a/b/c"
          }
      }
 }

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

@@ -15,5 +15,8 @@
     "KDUMP_WITH_INVALID_MEMORY": {
         "desc": "Configuring kdump config with invalid memory config.",
         "eStr": ["pattern", "does not satisfy"]
+    },
+    "KDUMP_WITH_VALID_REMOTE_VALUES": {
+        "desc": "Configuring the kdump with valid remote ssh values."
     }
 }

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

@@ -5,7 +5,10 @@
                 "config": {
                     "enabled": "true",
                     "num_dumps": "3",
-                    "memory": "0M-2G:256M,2G-4G:256M,4G-8G:384M,8G-:448M"
+                    "memory": "0M-2G:256M,2G-4G:256M,4G-8G:384M,8G-:448M",
+                    "remote": "true",
+                    "ssh_string" : "[email protected]",
+                    "ssh_path":  "/home/ali/.ssh/id_rsa" 
                 }
             }
         }
@@ -16,7 +19,10 @@
                 "config": {
                     "enabled": "true",
                     "num_dumps": "9",
-                    "memory": "512M"
+                    "memory": "512M",
+                    "remote": "true",
+                    "ssh_string" : "[email protected]",
+                    "ssh_path":  "/home/ali/.ssh/id_rsa" 
                 }
             }
         }
@@ -27,7 +33,10 @@
                 "config": {
                     "enabled": "false",
                     "num_dumps": "1",
-                    "memory": "512M"
+                    "memory": "512M",
+                    "remote": "true",
+                    "ssh_string" : "[email protected]",
+                    "ssh_path":  "/home/ali/.ssh/id_rsa" 
                 }
             }
         }
@@ -38,7 +47,10 @@
                 "config": {
                     "enabled": "true",
                     "num_dumps": "100",
-                    "memory": "0M-2G:256M,2G-4G:256M,4G-8G:384M,8G-:448M"
+                    "memory": "0M-2G:256M,2G-4G:256M,4G-8G:384M,8G-:448M",
+                    "remote": "true",
+                     "ssh_string" : "[email protected]",
+                    "ssh_path":  "/home/ali/.ssh/id_rsa"  
                 }
             }
         }
@@ -49,7 +61,25 @@
                 "config": {
                     "enabled": "true",
                     "num_dumps": "3",
-                    "memory": "666"
+                    "memory": "666",
+                    "remote": "true",
+                    "ssh_string" : "[email protected]",
+                    "ssh_path":  "/home/ali/.ssh/id_rsa" 
+                }
+            }
+        }
+    },
+
+    "KDUMP_WITH_VALID_REMOTE_VALUES": {
+        "sonic-kdump:sonic-kdump": {
+            "sonic-kdump:KDUMP": {
+                "config": {
+                    "enabled": "true",
+                    "num_dumps": "3",
+                    "memory": "0M-2G:256M,2G-4G:256M,4G-8G:384M,8G-:448M",
+                    "remote": "true",
+                    "ssh_string" : "[email protected]",
+                    "ssh_path":  "/home/ali/.ssh/id_rsa" 
                 }
             }
         }

src/sonic-yang-models/yang-models/sonic-kdump.yang

@@ -54,6 +54,28 @@ module sonic-kdump {
                     description
                         "Maximum number of Kernel Core files Stored";
                 }
+                leaf remote {
+                    type boolean;
+                    description
+                        "Enable or Disable the Kdump remote ssh mechanism";
+                }
+
+                leaf ssh_string {
+                    type string {
+                        pattern "([a-zA-Z0-9._%+-]+@([a-zA-Z0-9.-]+|[0-9]{1,3}(\\.[0-9]{1,3}){3}))";
+                    }
+                    description  "Remote ssh connection string";
+
+                }
+
+                leaf ssh_path {
+                    type string {
+                        pattern "(/([a-zA-Z0-9._-]+|\\.)+)+";
+                    }
+                    description  "Remote ssh private key path";
+
+                }
+
             }
         }
     }