[route_check] Filter out VNET routes (sonic-net#1612)

* Filter out VNET routes, Fix errors related to VNET routes printed by route_check script
Signed-off-by: Volodymyr Samotiy <[email protected]>

Author: volodymyrsamotiy

scripts/route_check.py

@@ -413,6 +413,36 @@ def filter_out_default_routes(lst):
     return upd
 
 
+def filter_out_vnet_routes(routes):
+    """
+    Helper to filter out VNET routes
+    :param routes: list of routes to filter
+    :return filtered list of routes.
+    """
+    db = swsscommon.DBConnector('APPL_DB', 0)
+
+    vnet_route_table = swsscommon.Table(db, 'VNET_ROUTE_TABLE')
+    vnet_route_tunnel_table = swsscommon.Table(db, 'VNET_ROUTE_TUNNEL_TABLE')
+
+    vnet_routes_db_keys = vnet_route_table.getKeys() + vnet_route_tunnel_table.getKeys()
+
+    vnet_routes = []
+
+    for vnet_route_db_key in vnet_routes_db_keys:
+        vnet_route_attrs = vnet_route_db_key.split(':')
+        vnet_name = vnet_route_attrs[0]
+        vnet_route = vnet_route_attrs[1]
+        vnet_routes.append(vnet_route)
+
+    updated_routes = []
+
+    for route in routes:
+        if not (route in vnet_routes):
+            updated_routes.append(route)
+
+    return updated_routes
+
+
 def check_routes():
     """
     The heart of this script which runs the checks.
@@ -448,6 +478,7 @@ def check_routes():
     # Check missed ASIC routes against APPL-DB INTF_TABLE
     _, rt_asic_miss = diff_sorted_lists(intf_appl, rt_asic_miss)
     rt_asic_miss = filter_out_default_routes(rt_asic_miss)
+    rt_asic_miss = filter_out_vnet_routes(rt_asic_miss)
 
     # Check APPL-DB INTF_TABLE with ASIC table route entries
     intf_appl_miss, _ = diff_sorted_lists(intf_appl, rt_asic)

tests/route_check_test.py

@@ -24,6 +24,7 @@
 OP_DEL = "DEL"
 
 ROUTE_TABLE = 'ROUTE_TABLE'
+VNET_ROUTE_TABLE = 'VNET_ROUTE_TABLE'
 INTF_TABLE = 'INTF_TABLE'
 RT_ENTRY_TABLE = 'ASIC_STATE'
 SEPARATOR = ":"
@@ -252,6 +253,45 @@
                 "10.10.196.30/31"
             ]
         }
+    },
+    "6": {
+        DESCR: "Good one with VNET routes",
+        ARGS: "route_check",
+        PRE: {
+            APPL_DB: {
+                ROUTE_TABLE: {
+                    "0.0.0.0/0" : { "ifname": "portchannel0" },
+                    "10.10.196.12/31" : { "ifname": "portchannel0" },
+                    "10.10.196.20/31" : { "ifname": "portchannel0" },
+                    "10.10.196.30/31" : { "ifname": "lo" }
+                },
+                VNET_ROUTE_TABLE: {
+                    "Vnet1:30.1.10.0/24": { "ifname": "Vlan3001" },
+                    "Vnet1:50.1.1.0/24": { "ifname": "Vlan3001" },
+                    "Vnet1:50.2.2.0/24": { "ifname": "Vlan3001" }
+                },
+                INTF_TABLE: {
+                    "PortChannel1013:10.10.196.24/31": {},
+                    "PortChannel1023:2603:10b0:503:df4::5d/126": {},
+                    "PortChannel1024": {},
+                    "Vlan3001": { "vnet_name": "Vnet1" },
+                    "Vlan3001:30.1.10.1/24": {}
+                }
+            },
+            ASIC_DB: {
+                RT_ENTRY_TABLE: {
+                    RT_ENTRY_KEY_PREFIX + "10.10.196.12/31" + RT_ENTRY_KEY_SUFFIX: {},
+                    RT_ENTRY_KEY_PREFIX + "10.10.196.20/31" + RT_ENTRY_KEY_SUFFIX: {},
+                    RT_ENTRY_KEY_PREFIX + "10.10.196.24/32" + RT_ENTRY_KEY_SUFFIX: {},
+                    RT_ENTRY_KEY_PREFIX + "2603:10b0:503:df4::5d/128" + RT_ENTRY_KEY_SUFFIX: {},
+                    RT_ENTRY_KEY_PREFIX + "0.0.0.0/0" + RT_ENTRY_KEY_SUFFIX: {},
+                    RT_ENTRY_KEY_PREFIX + "30.1.10.1/32" + RT_ENTRY_KEY_SUFFIX: {},
+                    RT_ENTRY_KEY_PREFIX + "30.1.10.0/24" + RT_ENTRY_KEY_SUFFIX: {},
+                    RT_ENTRY_KEY_PREFIX + "50.1.1.0/24" + RT_ENTRY_KEY_SUFFIX: {},
+                    RT_ENTRY_KEY_PREFIX + "50.2.2.0/24" + RT_ENTRY_KEY_SUFFIX: {}
+                }
+            }
+        }
     }
 }