Vnet alias mapping (sonic-net#924)

Author: prsunny

show/main.py

@@ -2989,6 +2989,38 @@ def tablelize(vnet_keys, vnet_data):
 
     click.echo(tabulate(tablelize(vnet_keys, vnet_data), header))
 
+@vnet.command()
+@click.argument('vnet_alias', required=False)
+def alias(vnet_alias):
+    """Show vnet alias to name information"""
+    config_db = ConfigDBConnector()
+    config_db.connect()
+    header = ['Alias', 'Name']
+
+    # Fetching data from config_db for VNET
+    vnet_data = config_db.get_table('VNET')
+    vnet_keys = natsorted(vnet_data.keys())
+
+    def tablelize(vnet_keys, vnet_data, vnet_alias):
+        table = []
+        for k in vnet_keys:
+            r = []
+            if vnet_alias is not None:
+                if vnet_data[k].get('guid') == vnet_alias:
+                    r.append(vnet_data[k].get('guid'))
+                    r.append(k)
+                    table.append(r)
+                    return table
+                else:
+                    continue
+
+            r.append(vnet_data[k].get('guid'))
+            r.append(k)
+            table.append(r)
+        return table
+
+    click.echo(tabulate(tablelize(vnet_keys, vnet_data, vnet_alias), header))
+
 @vnet.command()
 def interfaces():
     """Show vnet interfaces information"""