From 3483eb375e6a7c21b604bda6ece1215daf6a9a22 Mon Sep 17 00:00:00 2001
From: Manuel Alejandro de Brito Fontes <aledbf@gmail.com>
Date: Fri, 11 Jan 2019 14:43:02 -0300
Subject: [PATCH] Remove flag sort-backends

---
 cmd/nginx/flags.go                        |  8 +++-----
 internal/ingress/controller/controller.go | 22 ----------------------
 2 files changed, 3 insertions(+), 27 deletions(-)

diff --git a/cmd/nginx/flags.go b/cmd/nginx/flags.go
index 096a39cde3..df5a8167ba 100644
--- a/cmd/nginx/flags.go
+++ b/cmd/nginx/flags.go
@@ -114,9 +114,6 @@ different namespace than their own. May be used together with watch-namespace.`)
 			`Update the load-balancer status of Ingress objects when the controller shuts down.
 Requires the update-status parameter.`)
 
-		sortBackends = flags.Bool("sort-backends", false,
-			`Sort servers inside NGINX upstreams.`)
-
 		useNodeInternalIP = flags.Bool("report-node-internal-ip-address", false,
 			`Set the load-balancer status of Ingress objects to internal Node addresses instead of external.
 Requires the update-status parameter.`)
@@ -130,7 +127,7 @@ Requires the update-status parameter.`)
 		annotationsPrefix = flags.String("annotations-prefix", "nginx.ingress.kubernetes.io",
 			`Prefix of the Ingress annotations specific to the NGINX controller.`)
 
-		enableSSLChainCompletion = flags.Bool("enable-ssl-chain-completion", true,
+		enableSSLChainCompletion = flags.Bool("enable-ssl-chain-completion", false,
 			`Autocomplete SSL certificate chains with missing intermediate CA certificates.
 A valid certificate chain is required to enable OCSP stapling. Certificates
 uploaded to Kubernetes must have the "Authority Information Access" X.509 v3
@@ -163,6 +160,8 @@ Feature backed by OpenResty Lua libraries. Requires that OCSP stapling is not en
 			`Disable support for catch-all Ingresses`)
 	)
 
+	flags.MarkDeprecated("sort-backends", "Feature removed because of the lua load balancer that removed the need of reloads for change in endpoints")
+
 	flag.Set("logtostderr", "true")
 
 	flags.AddGoFlagSet(flag.CommandLine)
@@ -248,7 +247,6 @@ Feature backed by OpenResty Lua libraries. Requires that OCSP stapling is not en
 		PublishStatusAddress:       *publishStatusAddress,
 		ForceNamespaceIsolation:    *forceIsolation,
 		UpdateStatusOnShutdown:     *updateStatusOnShutdown,
-		SortBackends:               *sortBackends,
 		UseNodeInternalIP:          *useNodeInternalIP,
 		SyncRateLimit:              *syncRateLimit,
 		DynamicCertificatesEnabled: *dynamicCertificatesEnabled,
diff --git a/internal/ingress/controller/controller.go b/internal/ingress/controller/controller.go
index be0a1d9504..2522430b25 100644
--- a/internal/ingress/controller/controller.go
+++ b/internal/ingress/controller/controller.go
@@ -18,7 +18,6 @@ package controller
 
 import (
 	"fmt"
-	"math/rand"
 	"sort"
 	"strconv"
 	"strings"
@@ -79,8 +78,6 @@ type Configuration struct {
 	ElectionID             string
 	UpdateStatusOnShutdown bool
 
-	SortBackends bool
-
 	ListenPorts *ngx_config.ListenPorts
 
 	EnableSSLPassthrough bool
@@ -845,17 +842,6 @@ func (n *NGINXController) serviceEndpoints(svcKey, backendPort string) ([]ingres
 				klog.Warningf("Service %q does not have any active Endpoint.", svcKey)
 			}
 
-			if n.cfg.SortBackends {
-				sort.SliceStable(endps, func(i, j int) bool {
-					iName := endps[i].Address
-					jName := endps[j].Address
-					if iName != jName {
-						return iName < jName
-					}
-
-					return endps[i].Port < endps[j].Port
-				})
-			}
 			upstreams = append(upstreams, endps...)
 			break
 		}
@@ -884,14 +870,6 @@ func (n *NGINXController) serviceEndpoints(svcKey, backendPort string) ([]ingres
 		return upstreams, nil
 	}
 
-	if !n.cfg.SortBackends {
-		rand.Seed(time.Now().UnixNano())
-		for i := range upstreams {
-			j := rand.Intn(i + 1)
-			upstreams[i], upstreams[j] = upstreams[j], upstreams[i]
-		}
-	}
-
 	return upstreams, nil
 }