Allow changing extenal client image in Felix FVs

Author: mazdakn

felix/fv/infrastructure/ext_client.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tigera, Inc. All rights reserved.
+// Copyright (c) 2022-2025 Tigera, Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -18,13 +18,15 @@ import (
 	"os"
 
 	. "github.com/onsi/gomega"
+	"github.com/sirupsen/logrus"
 
 	"github.com/projectcalico/calico/felix/fv/containers"
 	"github.com/projectcalico/calico/felix/fv/utils"
 )
 
 type ExtClientOpts struct {
 	IPv6Enabled bool
+	Image       string
 }
 
 func RunExtClient(namePrefix string) *containers.Container {
@@ -34,14 +36,20 @@ func RunExtClient(namePrefix string) *containers.Container {
 func RunExtClientWithOpts(namePrefix string, opts ExtClientOpts) *containers.Container {
 	wd, err := os.Getwd()
 	Expect(err).NotTo(HaveOccurred(), "failed to get working directory")
+
+	image := utils.Config.BusyboxImage
+	if opts.Image != "" {
+		image = opts.Image
+	}
+	logrus.Infof("Running external client container with options %#v", opts)
 	c := containers.Run(
 		namePrefix,
 		containers.RunOpts{
 			AutoRemove: true,
 		},
 		"--privileged",                    // So that we can add routes inside the container.
 		"-v", wd+"/../bin:/usr/local/bin", // Map in the test-connectivity binary etc.
-		utils.Config.BusyboxImage,
+		image,
 		"/bin/sh", "-c", "sleep 1000")
 
 	if opts.IPv6Enabled {