From 9b3d690141cbebc8186a3e144b205ff1e98bb77c Mon Sep 17 00:00:00 2001
From: Xiaoyu Zhong <topaz.zhong@gmail.com>
Date: Thu, 2 Jan 2020 17:02:23 +0800
Subject: [PATCH] Stabilize sequence of "export xx=xxx" statements

---
 pkg/model/bootstrapscript.go | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/pkg/model/bootstrapscript.go b/pkg/model/bootstrapscript.go
index 9adf78145c698..0d2e815f6ca3a 100644
--- a/pkg/model/bootstrapscript.go
+++ b/pkg/model/bootstrapscript.go
@@ -22,6 +22,7 @@ import (
 	"encoding/base64"
 	"fmt"
 	"os"
+	"sort"
 	"strconv"
 	"strings"
 	"text/template"
@@ -150,9 +151,17 @@ func (b *BootstrapScript) ResourceNodeUp(ig *kops.InstanceGroup, cluster *kops.C
 			if err != nil {
 				return "", err
 			}
+
+			// Sort keys to have a stable sequence of "export xx=xxx"" statements
+			var keys []string
+			for k := range env {
+				keys = append(keys, k)
+			}
+			sort.Strings(keys)
+
 			var b bytes.Buffer
-			for k, v := range env {
-				b.WriteString(fmt.Sprintf("export %s=%s\n", k, v))
+			for _, k := range keys {
+				b.WriteString(fmt.Sprintf("export %s=%s\n", k, env[k]))
 			}
 			return b.String(), nil
 		},