set rlimit in backend

backend.go

@@ -94,6 +94,10 @@ func backendServer() {
 	if err != nil {
 		log.Panicf("unable to register shrinker: %s", err)
 	}
+	err = setLimits()
+	if err != nil {
+		log.Printf("error setting backend limits: %s", err)
+	}
 	for _, h := range backendhooks {
 		h()
 	}

sensors.go

@@ -41,3 +41,10 @@ func getSensors() Sensors {
 
 	return sensors
 }
+
+func setLimits() error {
+	var limit syscall.Rlimit
+	limit.Cur = 2 * 1024 * 1024 * 1024
+	limit.Max = 2 * 1024 * 1024 * 1024
+	return syscall.Setrlimit(syscall.RLIMIT_DATA, &limit)
+}