From 6d9772ce007195c640ade310385b8b4088abfedd Mon Sep 17 00:00:00 2001
From: Mike Bryant <mike@mikebryant.me.uk>
Date: Fri, 10 Aug 2018 12:09:14 +0100
Subject: [PATCH] fix: Sort TCP/UDP upstream order (#2885)

Fixes #2721
---
 internal/ingress/controller/controller.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/internal/ingress/controller/controller.go b/internal/ingress/controller/controller.go
index c0474b380..55bbfc6bf 100644
--- a/internal/ingress/controller/controller.go
+++ b/internal/ingress/controller/controller.go
@@ -337,6 +337,11 @@ func (n *NGINXController) getStreamServices(configmapName string, proto apiv1.Pr
 		})
 	}
 
+	// Keep upstream order sorted to reduce unnecessary nginx config reloads.
+	sort.SliceStable(svcs, func(i, j int) bool {
+		return svcs[i].Port < svcs[j].Port
+	})
+
 	return svcs
 }