Merge pull request #12194 from justinsb/warn_if_unknown_arch

Warn if KOPS_ARCH is not a recognized value

util/pkg/architectures/BUILD.bazel

@@ -5,4 +5,5 @@ go_library(
     srcs = ["architectures.go"],
     importpath = "k8s.io/kops/util/pkg/architectures",
     visibility = ["//visibility:public"],
+    deps = ["//vendor/k8s.io/klog/v2:go_default_library"],
 )

util/pkg/architectures/architectures.go

@@ -20,6 +20,8 @@ import (
 	"fmt"
 	"os"
 	"runtime"
+
+	"k8s.io/klog/v2"
 )
 
 type Architecture string
@@ -44,11 +46,15 @@ func GetSupported() []Architecture {
 	// Kubernetes PR builds only generate AMD64 binaries at the moment
 	// Force support only for AMD64 or ARM64
 	arch := os.Getenv("KOPS_ARCH")
+	if arch != "" {
 		switch arch {
 		case "amd64":
 			return []Architecture{ArchitectureAmd64}
 		case "arm64":
 			return []Architecture{ArchitectureArm64}
+		default:
+			klog.Warningf("unknown architecture KOPS_ARCH=%q", arch)
+		}
 	}
 
 	return []Architecture{