Fix last flaky terratest

* Do not fail immediately on 503
* Fixes k8gb-io#1345

Signed-off-by: Yury Tsarev <yury@upbound.io>

terratest/utils/extensions.go

@@ -21,14 +21,15 @@ Generated by GoLic, for more details see: https://github.com/AbsaOSS/golic
 import (
 	"encoding/json"
 	"fmt"
-	"github.com/gruntwork-io/terratest/modules/retry"
 	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
 	"testing"
 	"time"
 
+	"github.com/gruntwork-io/terratest/modules/retry"
+
 	"github.com/AbsaOSS/gopkg/dns"
 	gopkgstr "github.com/AbsaOSS/gopkg/string"
 	"github.com/gruntwork-io/terratest/modules/helm"
@@ -432,8 +433,11 @@ func (i *Instance) HitTestApp() (result *TestAppResult) {
 	result = new(TestAppResult)
 	coreDNSIP := i.GetCoreDNSIP()
 	command := []string{"sh", "-c", fmt.Sprintf("wget -qO - %s", i.w.state.gslb.host)}
-	for t := 0; t < 3; t++ {
+	for t := 0; t < 60; t++ {
 		result.Body, err = RunBusyBoxCommand(i.w.t, i.w.k8sOptions, coreDNSIP, command)
+		if err != nil && strings.Contains(err.Error(), "503") {
+			continue
+		}
 		require.NoError(i.w.t, err, "busybox", command, result.Body)
 		if strings.HasPrefix(result.Body, "{") {
 			break