From c8cb018203b6264e16adb16c0ed7d62cdf287131 Mon Sep 17 00:00:00 2001
From: Shreyas Rao <42259948+shreyas-s-rao@users.noreply.github.com>
Date: Wed, 2 Aug 2023 14:59:07 +0530
Subject: [PATCH] Skip scale-up checks for first member of etcd cluster. (#649)
 (#654)

Co-authored-by: Ishan Tyagi <42602577+ishan16696@users.noreply.github.com>
---
 pkg/initializer/initializer.go | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/pkg/initializer/initializer.go b/pkg/initializer/initializer.go
index d887d4d7f..48dc6be9d 100644
--- a/pkg/initializer/initializer.go
+++ b/pkg/initializer/initializer.go
@@ -19,6 +19,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/gardener/etcd-backup-restore/pkg/errors"
@@ -57,8 +58,15 @@ func (e *EtcdInitializer) Initialize(mode validator.Mode, failBelowRevision int6
 	ctx := context.Background()
 	var err error
 
-	//Etcd cluster scale-up case
-	if miscellaneous.IsMultiNode(logger) {
+	podName, err := miscellaneous.GetEnvVarOrError("POD_NAME")
+	if err != nil {
+		logger.Fatalf("Error reading POD_NAME env var : %v", err)
+	}
+
+	// Etcd cluster scale-up case
+	// Note: first member of etcd cluster can never be part of scale-up case.
+	// TODO: consider removing this special check for first cluster member when backup-restore can check presence of any member in cluster.
+	if miscellaneous.IsMultiNode(logger) && !strings.HasSuffix(podName, "0") {
 		clientSet, err := miscellaneous.GetKubernetesClientSetOrError()
 		if err != nil {
 			logger.Fatalf("failed to create clientset, %v", err)