From 91ba9ccefe37f5d661dc29d0e581c709030453c5 Mon Sep 17 00:00:00 2001
From: Mahmood Ali <mahmood@hashicorp.com>
Date: Tue, 21 Jul 2020 15:40:41 -0400
Subject: [PATCH] honor config.NetworkInterface in NodeNetworks

---
 client/fingerprint/network.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/client/fingerprint/network.go b/client/fingerprint/network.go
index 32565d7a0..1c77a7657 100644
--- a/client/fingerprint/network.go
+++ b/client/fingerprint/network.go
@@ -235,13 +235,17 @@ func deriveAddressAlias(iface net.Interface, addr net.IP, config *config.Config)
 		}
 	}
 
-	ri, err := sockaddr.NewRouteInfo()
-	if err == nil {
+	if config.NetworkInterface != "" {
+		if config.NetworkInterface == iface.Name {
+			return "default"
+		}
+	} else if ri, err := sockaddr.NewRouteInfo(); err == nil {
 		defaultIface, err := ri.GetDefaultInterfaceName()
 		if err == nil && iface.Name == defaultIface {
 			return "default"
 		}
 	}
+
 	return ""
 }