From 9b5c2c386a925abd3df3323d2b2a86fdd55f5e60 Mon Sep 17 00:00:00 2001
From: drivebyer <yang.wu@daocloud.io>
Date: Mon, 17 Jul 2023 16:14:01 +0800
Subject: [PATCH] fix: return error when requested interface has no stats
 available (#17666)

---
 internal/net/net.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/internal/net/net.go b/internal/net/net.go
index 9443156d5..1252baa07 100644
--- a/internal/net/net.go
+++ b/internal/net/net.go
@@ -18,6 +18,8 @@
 package net
 
 import (
+	"fmt"
+
 	"github.com/prometheus/procfs"
 )
 
@@ -31,5 +33,9 @@ func GetInterfaceNetStats(interf string) (procfs.NetDevLine, error) {
 	if err != nil {
 		return procfs.NetDevLine{}, err
 	}
-	return netDev[interf], nil
+	ndl, ok := netDev[interf]
+	if !ok {
+		return procfs.NetDevLine{}, fmt.Errorf("%v interface not found", interf)
+	}
+	return ndl, nil
 }