From e77de69a153151a010ae7bf4bd92187336a7b9ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=88=98=E7=A5=A5=E8=B6=85?= <iwind.liu@gmail.com>
Date: Wed, 4 May 2022 16:40:25 +0800
Subject: [PATCH] =?UTF-8?q?=E8=8A=82=E7=82=B9=E5=A2=9E=E5=8A=A0DNS?=
 =?UTF-8?q?=E8=A7=A3=E6=9E=90=E5=BA=93=E7=B1=BB=E5=9E=8B=E8=AE=BE=E7=BD=AE?=
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---
 internal/nodes/node.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/internal/nodes/node.go b/internal/nodes/node.go
index d88bc06..f3dd5ce 100644
--- a/internal/nodes/node.go
+++ b/internal/nodes/node.go
@@ -878,6 +878,22 @@ func (this *Node) onReload(config *nodeconfigs.NodeConfig) {
 	if config.ProductConfig != nil {
 		teaconst.GlobalProductName = config.ProductConfig.Name
 	}
+
+	// DNS resolver
+	if config.DNSResolver != nil {
+		var err error
+		switch config.DNSResolver.Type {
+		case nodeconfigs.DNSResolverTypeGoNative:
+			err = os.Setenv("GODEBUG", "netdns=go+2")
+		case nodeconfigs.DNSResolverTypeCGO:
+			err = os.Setenv("GODEBUG", "netdns=cgo+2")
+		default:
+			err = os.Unsetenv("GODEBUG")
+		}
+		if err != nil {
+			remotelogs.Error("NODE", "[DNS_RESOLVER]set env failed: "+err.Error())
+		}
+	}
 }
 
 // reload server config