добавлена фича защиты маршрутов

config.go

@@ -13,6 +13,7 @@ type Gateway struct {
 type Config struct {
 	Controller string    `json:"controller"`
 	Gateway    []Gateway `json:"gateway"`
+	Protected  []string  `json:"protected"`
 	Metric     int       `json:"metric"`
 	Timeout    int       `json:"timeout"`
 	Interval   int       `json:"interval"`

routes.go

@@ -103,12 +103,12 @@ func hotswapUpdate(cfg *Config, gatewayStates map[string]bool, subnets []string)
 		}
 		if !gatewayStates[name] {
 			log.Printf("Gateway %q is down, deleting route %s via %s", name, r.Subnet, r.Gateway)
-			delRoute(r.Subnet, r.Gateway)
+			delRoute(r.Subnet, r.Gateway, cfg.Protected)
 			continue
 		}
 		if !subnetsContains(subnets, r.Subnet) {
 			log.Printf("Subnet %s not in subnets list, deleting route via %s", r.Subnet, r.Gateway)
-			delRoute(r.Subnet, r.Gateway)
+			delRoute(r.Subnet, r.Gateway, cfg.Protected)
 		}
 	}
 
@@ -150,11 +150,11 @@ func failoverUpdate(cfg *Config, gatewayStates map[string]bool, subnets []string
 				continue
 			}
 			log.Printf("Subnet %s not in subnets, deleting primary route via %s", r.Subnet, r.Gateway)
-			delRoute(r.Subnet, r.Gateway)
+			delRoute(r.Subnet, r.Gateway, cfg.Protected)
 			continue
 		}
 		log.Printf("Deleting route %s via %s (gateway %q)", r.Subnet, r.Gateway, name)
-		delRoute(r.Subnet, r.Gateway)
+		delRoute(r.Subnet, r.Gateway, cfg.Protected)
 	}
 
 	if primaryGW == nil {
@@ -171,7 +171,11 @@ func failoverUpdate(cfg *Config, gatewayStates map[string]bool, subnets []string
 	}
 }
 
-func delRoute(subnet, gw string) {
+func delRoute(subnet, gw string, protected []string) {
+	if subnetsContains(protected, subnet) {
+		log.Printf("Route %s is protected, skipping delete", subnet)
+		return
+	}
 	cmd := exec.Command("ip", "route", "del", subnet, "via", gw)
 	if err := cmd.Run(); err != nil {
 		log.Printf("Failed to delete route %s via %s: %v", subnet, gw, err)

srm.json

@@ -8,5 +8,8 @@
     "timeout": 3,
     "interval": 10,
     "port": 8089,
-    "hotswap": false
+    "hotswap": false,
+    "protected":[
+        "2.2.2.2/32"
+    ]
 }