Setup e2e_node to support testing on ARM64

* Enable dockerized build with --use-dockerized-build=true
* Build and create test artifacts for ARM64 with --target-build-arch=arm64
* Prepull multi-arch ready container image
* Download ARM64 binaries/packages if running on ARM64 machine

test/e2e_node/builder/build.go

@@ -29,6 +29,8 @@ import (
 )
 
 var k8sBinDir = flag.String("k8s-bin-dir", "", "Directory containing k8s kubelet binaries.")
+var useDockerizedBuild = flag.Bool("use-dockerized-build", false, "Use dockerized build for test artifacts")
+var targetBuildArch = flag.String("target-build-arch", "linux/amd64", "Target architecture for the test artifacts for dockerized build")
 
 var buildTargets = []string{
 	"cmd/kubelet",
@@ -47,6 +49,11 @@ func BuildGo() error {
 	}
 	targets := strings.Join(buildTargets, " ")
 	cmd := exec.Command("make", "-C", k8sRoot, fmt.Sprintf("WHAT=%s", targets))
+	if IsDockerizedBuild() {
+		klog.Infof("Building dockerized k8s binaries targets %s for architecture %s", targets, GetTargetBuildArch())
+		// Multi-architecture build is only supported in dockerized build
+		cmd = exec.Command(filepath.Join(k8sRoot, "build/run.sh"), "make", fmt.Sprintf("WHAT=%s", targets), fmt.Sprintf("KUBE_BUILD_PLATFORMS=%s", GetTargetBuildArch()))
+	}
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
 	err = cmd.Run()
@@ -56,6 +63,21 @@ func BuildGo() error {
 	return nil
 }
 
+// IsDockerizedBuild returns if test needs to use dockerized build
+func IsDockerizedBuild() bool {
+	return *useDockerizedBuild
+}
+
+// GetTargetBuildArch returns the target build architecture for dockerized build
+func GetTargetBuildArch() string {
+	return *targetBuildArch
+}
+
+// IsTargetArchArm64 returns if the target is for linux/arm64 platform
+func IsTargetArchArm64() bool {
+	return GetTargetBuildArch() == "linux/arm64"
+}
+
 func getK8sBin(bin string) (string, error) {
 	// Use commandline specified path
 	if *k8sBinDir != "" {
@@ -77,7 +99,7 @@ func getK8sBin(bin string) (string, error) {
 		return filepath.Join(path, bin), nil
 	}
 
-	buildOutputDir, err := utils.GetK8sBuildOutputDir()
+	buildOutputDir, err := utils.GetK8sBuildOutputDir(IsDockerizedBuild(), GetTargetBuildArch())
 	if err != nil {
 		return "", err
 	}