CheckMonitor runs forever and runs the first check immediately

command/agent/check.go

@@ -55,13 +55,17 @@ func (c *CheckMonitor) Stop() {
 
 // run is invoked by a goroutine to run until Stop() is called
 func (c *CheckMonitor) run() {
+	next := time.After(0)
+	for {
 		select {
-	case <-time.After(c.Interval):
+		case <-next:
 			c.check()
+			next = time.After(c.Interval)
 		case <-c.stopCh:
 			return
 		}
 	}
+}
 
 // check is invoked periodically to perform the script check
 func (c *CheckMonitor) check() {