feat: add instance-hypervisor as an AWS node label

Makefile

@@ -80,7 +80,7 @@ codegen: ## Generate code. Must be run if changes are made to ./pkg/apis/...
 
 docgen: ## Generate docs
 	go run hack/docs/metrics_gen_docs.go pkg/ website/content/en/preview/tasks/metrics.md
-	go run hack/docs/instancetypes_gen_docs.go ${KARPENTER_SUBNET_SELECTOR} website/content/en/preview/AWS/instance-types.md
+	go run hack/docs/instancetypes_gen_docs.go website/content/en/preview/AWS/instance-types.md
 
 release: ## Generate release manifests and publish a versioned container image.
 	$(WITH_GOFLAGS) ./hack/release.sh

hack/docs/instancetypes_gen_docs.go

@@ -6,6 +6,11 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
+	"log"
+	"os"
+	"sort"
+	"strings"
+
 	"github.com/aws/karpenter/pkg/apis/provisioning/v1alpha5"
 	"github.com/aws/karpenter/pkg/cloudprovider"
 	"github.com/aws/karpenter/pkg/cloudprovider/aws"
@@ -15,28 +20,25 @@ import (
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/util/sets"
-	"log"
-	"os"
-	"sort"
-	"strings"
 )
 
 func main() {
 	flag.Parse()
-	if flag.NArg() != 2 {
-		log.Printf("Usage: %s subnet-discovery-tag-value path/to/markdown.md", os.Args[0])
+	if flag.NArg() != 1 {
+		log.Printf("Usage: %s path/to/markdown.md", os.Args[0])
 		os.Exit(1)
 	}
 
 	os.Setenv("AWS_SDK_LOAD_CONFIG", "true")
+	os.Setenv("AWS_REGION", "us-east-1")
 	ctx := context.Background()
 
 	cp := aws.NewCloudProvider(ctx, cloudprovider.Options{
 		ClientSet:  nil,
 		KubeClient: nil,
 	})
 	provider := v1alpha1.AWS{SubnetSelector: map[string]string{
-		"karpenter.sh/discovery": flag.Arg(0),
+		"*": "*",
 	}}
 	var buf bytes.Buffer
 	enc := json.NewEncoder(&buf)
@@ -51,7 +53,7 @@ func main() {
 		log.Fatalf("listing instance types, %s", err)
 	}
 
-	outputFileName := flag.Arg(1)
+	outputFileName := flag.Arg(0)
 	f, err := os.Create(outputFileName)
 	if err != nil {
 		log.Fatalf("error creating output file %s, %s", outputFileName, err)

pkg/cloudprovider/aws/apis/v1alpha1/register.go

@@ -57,6 +57,7 @@ var (
 	ResourceAWSNeuron v1.ResourceName = "aws.amazon.com/neuron"
 	ResourceAWSPodENI v1.ResourceName = "vpc.amazonaws.com/pod-eni"
 
+	LabelInstanceHypervisor      = LabelDomain + "/instance-hypervisor"
 	LabelInstanceFamily          = LabelDomain + "/instance-family"
 	LabelInstanceSize            = LabelDomain + "/instance-size"
 	LabelInstanceCPU             = LabelDomain + "/instance-cpu"
@@ -86,6 +87,7 @@ func init() {
 	Scheme.AddKnownTypes(schema.GroupVersion{Group: v1alpha5.ExtensionsGroup, Version: "v1alpha1"}, &AWS{})
 	v1alpha5.RestrictedLabelDomains = v1alpha5.RestrictedLabelDomains.Insert(RestrictedLabelDomains...)
 	v1alpha5.WellKnownLabels = v1alpha5.WellKnownLabels.Insert(
+		LabelInstanceHypervisor,
 		LabelInstanceFamily,
 		LabelInstanceSize,
 		LabelInstanceCPU,

pkg/cloudprovider/aws/fake/ec2api.go

@@ -353,7 +353,7 @@ func (e *EC2API) DescribeInstanceTypesPagesWithContext(_ context.Context, _ *ec2
 				SupportedVirtualizationTypes:  []*string{aws.String("hvm")},
 				BurstablePerformanceSupported: aws.Bool(false),
 				BareMetal:                     aws.Bool(false),
-				Hypervisor:                    aws.String("nitro"),
+				Hypervisor:                    aws.String("xen"),
 				ProcessorInfo: &ec2.ProcessorInfo{
 					SupportedArchitectures: aws.StringSlice([]string{"x86_64"}),
 				},

pkg/cloudprovider/aws/instancetype.go

@@ -128,6 +128,7 @@ func (i *InstanceType) computeRequirements() scheduling.Requirements {
 		v1alpha1.LabelInstanceGPUManufacturer: sets.NewSet(),
 		v1alpha1.LabelInstanceGPUCount:        sets.NewSet(),
 		v1alpha1.LabelInstanceGPUMemory:       sets.NewSet(),
+		v1alpha1.LabelInstanceHypervisor:      sets.NewSet(aws.StringValue(i.Hypervisor)),
 	}
 	// Instance Type Labels
 	instanceTypeParts := strings.Split(aws.StringValue(i.InstanceType), ".")

pkg/cloudprovider/aws/suite_test.go

@@ -192,6 +192,7 @@ var _ = Describe("Allocation", func() {
 				ExpectApplied(ctx, env.Client, provisioner)
 				var pods []*v1.Pod
 				for key, value := range map[string]string{
+					v1alpha1.LabelInstanceHypervisor:      "xen",
 					v1alpha1.LabelInstanceFamily:          "p3",
 					v1alpha1.LabelInstanceSize:            "xlarge",
 					v1alpha1.LabelInstanceCPU:             "32",
@@ -1384,6 +1385,7 @@ var _ = Describe("Allocation", func() {
 			})
 			It("should support well known labels", func() {
 				for _, label := range []string{
+					v1alpha1.LabelInstanceHypervisor,
 					v1alpha1.LabelInstanceFamily,
 					v1alpha1.LabelInstanceSize,
 					v1alpha1.LabelInstanceCPU,