JSONify healthcheck Description for BackendConfig

pkg/healthchecks/healthchecks.go

@@ -32,6 +32,7 @@ import (
 	"k8s.io/ingress-gce/pkg/loadbalancers/features"
 	"k8s.io/ingress-gce/pkg/translator"
 	"k8s.io/ingress-gce/pkg/utils"
+	"k8s.io/ingress-gce/pkg/utils/descutils"
 	"k8s.io/klog/v2"
 )
 
@@ -43,13 +44,30 @@ type HealthChecks struct {
 	// This is a workaround which allows us to not have to maintain
 	// a separate health checker for the default backend.
 	defaultBackendSvc types.NamespacedName
+	clusterInfo       descutils.ClusterInfo
 }
 
 // NewHealthChecker creates a new health checker.
 // cloud: the cloud object implementing SingleHealthCheck.
 // defaultHealthCheckPath: is the HTTP path to use for health checks.
 func NewHealthChecker(cloud HealthCheckProvider, healthCheckPath string, defaultBackendSvc types.NamespacedName) *HealthChecks {
-	return &HealthChecks{cloud, healthCheckPath, defaultBackendSvc}
+	ci := generateClusterInfo(cloud.(*gce.Cloud))
+	return &HealthChecks{cloud, healthCheckPath, defaultBackendSvc, ci}
+}
+
+func generateClusterInfo(gceCloud *gce.Cloud) descutils.ClusterInfo {
+	var location string
+	regionalCluster := gceCloud.Regional()
+	if regionalCluster {
+		location = gceCloud.Region()
+	} else {
+		location = gceCloud.Zone()
+	}
+	name, err := gceCloud.ClusterID.GetID()
+	if err != nil {
+		klog.Errorf("Failed to obtain cluster name, %+v", err)
+	}
+	return descutils.ClusterInfo{Name: name, Location: location, Regional: regionalCluster}
 }
 
 // new returns a *HealthCheck with default settings and specified port/protocol
@@ -67,9 +85,23 @@ func (h *HealthChecks) new(sp utils.ServicePort) *translator.HealthCheck {
 	hc.Name = sp.BackendName()
 	hc.Port = sp.NodePort
 	hc.RequestPath = h.pathFromSvcPort(sp)
+	hc.SetHealthcheckInfo(h.generateHealthcheckInfo(hc))
 	return hc
 }
 
+func (h *HealthChecks) generateHealthcheckInfo(hc *translator.HealthCheck) descutils.HealthcheckInfo {
+	ingressType := descutils.ExternalLB
+	if hc.ForILB {
+		ingressType = descutils.InternalLB
+	}
+	return descutils.HealthcheckInfo{
+		ClusterInfo:       h.clusterInfo,
+		ServiceInfo:       descutils.ServiceInfo(h.defaultBackendSvc),
+		HealthcheckConfig: descutils.DefaultHC,
+		IngressType:       ingressType,
+	}
+}
+
 // SyncServicePort implements HealthChecker.
 func (h *HealthChecks) SyncServicePort(sp *utils.ServicePort, probe *v1.Probe) (string, error) {
 	hc := h.new(*sp)

pkg/healthchecks/healthchecks_test.go

@@ -453,7 +453,9 @@ func TestRolloutUpdateCustomHCDescription(t *testing.T) {
 		flags.F.EnableUpdateCustomHealthCheckDescription = oldUpdateDescription
 	}()
 
-	fakeGCE := gce.NewFakeGCECloud(gce.DefaultTestClusterValues())
+	testClusterValues := gce.DefaultTestClusterValues()
+	testClusterValues.Regional = true
+	fakeGCE := gce.NewFakeGCECloud(testClusterValues)
 
 	var (
 		defaultSP       *utils.ServicePort = testSPs["HTTP-80-reg-nil"]
@@ -503,9 +505,17 @@ func TestRolloutUpdateCustomHCDescription(t *testing.T) {
 
 	outputBCHCWithFlag := getSingletonHealthcheck(t, fakeGCE)
 
-	if outputBCHCWithFlag.Description != translator.DescriptionForHealthChecksFromBackendConfig {
+	wantDescription := "" +
+		fmt.Sprintf("{\n") +
+		fmt.Sprintf("    \"K8sCluster\": \"/locations/%s/clusters/%s\",\n", gce.DefaultTestClusterValues().Region, gce.DefaultTestClusterValues().ClusterID) +
+		fmt.Sprintf("    \"K8sResource\": \"/namespaces/%s/services/%s\",\n", defaultBackendSvc.Namespace, defaultBackendSvc.Name) +
+		fmt.Sprintf("    \"K8sResourceDependency\": \"Ingress External Load Balancer\",\n") +
+		fmt.Sprintf("    \"Config\": \"BackendConfig\"\n") +
+		fmt.Sprintf("}")
+
+	if outputBCHCWithFlag.Description != wantDescription {
 		t.Fatalf("incorrect Description, is: \"%v\", want: \"%v\"",
-			outputBCHCWithFlag.Description, translator.DescriptionForHealthChecksFromBackendConfig)
+			outputBCHCWithFlag.Description, wantDescription)
 	}
 
 	// Verify that only the Description is modified after rollout.
@@ -1325,15 +1335,40 @@ func TestSyncServicePort(t *testing.T) {
 	// settings.
 
 	for _, tc := range cases {
+		tc := *tc
 		tc.updateHCDescription = true
 		tc.desc = tc.desc + " with updateHCDescription"
-		cases = append(cases, tc)
+		copyOfWant := *tc.wantComputeHC
+		if tc.sp.BackendConfig != nil {
+			var wantLocation, wantIngressType string
+			if tc.regional {
+				wantLocation = gce.DefaultTestClusterValues().Region
+			} else {
+				wantLocation = gce.DefaultTestClusterValues().ZoneName
+			}
+			if tc.sp.L7ILBEnabled {
+				wantIngressType = "Ingress Internal Load Balancer"
+			} else {
+				wantIngressType = "Ingress External Load Balancer"
+			}
+			copyOfWant.Description = "" +
+				fmt.Sprintf("{\n") +
+				fmt.Sprintf("    \"K8sCluster\": \"/locations/%s/clusters/%s\",\n", wantLocation, gce.DefaultTestClusterValues().ClusterID) +
+				fmt.Sprintf("    \"K8sResource\": \"/namespaces/%s/services/%s\",\n", defaultBackendSvc.Namespace, defaultBackendSvc.Name) +
+				fmt.Sprintf("    \"K8sResourceDependency\": \"%s\",\n", wantIngressType) +
+				fmt.Sprintf("    \"Config\": \"BackendConfig\"\n") +
+				fmt.Sprintf("}")
+		}
+		tc.wantComputeHC = &copyOfWant
+		cases = append(cases, &tc)
 	}
 
 	for _, tc := range cases {
 		t.Run(tc.desc, func(t *testing.T) {
 			flags.F.EnableUpdateCustomHealthCheckDescription = tc.updateHCDescription
-			fakeGCE := gce.NewFakeGCECloud(gce.DefaultTestClusterValues())
+			testClusterValues := gce.DefaultTestClusterValues()
+			testClusterValues.Regional = tc.regional
+			fakeGCE := gce.NewFakeGCECloud(testClusterValues)
 
 			mock := fakeGCE.Compute().(*cloud.MockGCE)
 			setupMockUpdate(mock)
@@ -1364,20 +1399,20 @@ func TestSyncServicePort(t *testing.T) {
 					t.Fatalf("Got %d healthchecks, want 1\n%s", len(computeHCs), pretty.Sprint(computeHCs))
 				}
 
-				gotHC := computeHCs[0]
 				// Filter out SelfLink because it is hard to deal with in the mock and
 				// test cases.
-				filter := func(hc *compute.HealthCheck) {
+				filter := func(hc compute.HealthCheck) compute.HealthCheck {
 					hc.SelfLink = ""
 					if !tc.updateHCDescription {
 						hc.Description = ""
 					}
+					return hc
 				}
-				filter(gotHC)
-				filter(tc.wantComputeHC)
+				gotHC := filter(*computeHCs[0])
+				wantHC := filter(*tc.wantComputeHC)
 
-				if !reflect.DeepEqual(gotHC, tc.wantComputeHC) {
-					t.Fatalf("Compute healthcheck is:\n%s, want:\n%s", pretty.Sprint(gotHC), pretty.Sprint(tc.wantComputeHC))
+				if !reflect.DeepEqual(gotHC, wantHC) {
+					t.Fatalf("Compute healthcheck is:\n%s, want:\n%s", pretty.Sprint(gotHC), pretty.Sprint(wantHC))
 				}
 			}
 

pkg/translator/healthchecks.go

@@ -32,6 +32,7 @@ import (
 	"k8s.io/ingress-gce/pkg/flags"
 	"k8s.io/ingress-gce/pkg/loadbalancers/features"
 	"k8s.io/ingress-gce/pkg/utils"
+	"k8s.io/ingress-gce/pkg/utils/descutils"
 	"k8s.io/klog/v2"
 )
 
@@ -90,6 +91,19 @@ type HealthCheck struct {
 	// compute struct back.
 	computealpha.HTTPHealthCheck
 	computealpha.HealthCheck
+	healthcheckInfo descutils.HealthcheckInfo
+}
+
+func (hc *HealthCheck) UpdateHealthcheckConfig(c descutils.HealthcheckConfig) {
+	hc.healthcheckInfo.HealthcheckConfig = c
+	hc.SetHealthcheckInfo(hc.healthcheckInfo) // This is not a no-op.
+}
+
+func (hc *HealthCheck) SetHealthcheckInfo(i descutils.HealthcheckInfo) {
+	hc.healthcheckInfo = i
+	if flags.F.EnableUpdateCustomHealthCheckDescription && i.HealthcheckConfig == descutils.BackendConfigHC {
+		hc.Description = hc.healthcheckInfo.GenerateHealthcheckDescription()
+	}
 }
 
 // NewHealthCheck creates a HealthCheck which abstracts nested structs away
@@ -227,6 +241,7 @@ func (hc *HealthCheck) UpdateFromBackendConfig(c *backendconfigv1.HealthCheckCon
 	if flags.F.EnableUpdateCustomHealthCheckDescription {
 		hc.Description = DescriptionForHealthChecksFromBackendConfig
 	}
+	hc.UpdateHealthcheckConfig(descutils.BackendConfigHC)
 }
 
 // DefaultHealthCheck simply returns the default health check.
@@ -337,4 +352,5 @@ func ApplyProbeSettingsToHC(p *v1.Probe, hc *HealthCheck) {
 	}
 
 	hc.Description = DescriptionForHealthChecksFromReadinessProbe
+	hc.UpdateHealthcheckConfig(descutils.ReadinessProbeHC)
 }

pkg/utils/descutils/utils.go

@@ -16,7 +16,64 @@ limitations under the License.
 
 package descutils
 
-import "fmt"
+import (
+	"encoding/json"
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/klog/v2"
+)
+
+type ClusterInfo struct {
+	Name     string
+	Location string
+	Regional bool
+}
+
+type ServiceInfo types.NamespacedName
+
+type HealthcheckConfig string
+
+const (
+	DefaultHC        HealthcheckConfig = "Default"
+	ReadinessProbeHC HealthcheckConfig = "ReadinessProbe"
+	BackendConfigHC  HealthcheckConfig = "BackendConfig"
+)
+
+type IngressType string
+
+const (
+	InternalLB IngressType = "Ingress Internal Load Balancer"
+	ExternalLB IngressType = "Ingress External Load Balancer"
+)
+
+type HealthcheckInfo struct {
+	ClusterInfo
+	ServiceInfo
+	HealthcheckConfig
+	IngressType
+}
+
+type HealthcheckDesc struct {
+	K8sCluster            string
+	K8sResource           string
+	K8sResourceDependency IngressType
+	Config                HealthcheckConfig
+}
+
+func (i *ClusterInfo) generateClusterDescription() string {
+	// locType here differs from locType in GenerateClusterLink().
+	locType := "locations"
+	return fmt.Sprintf("/%s/%s/clusters/%s", locType, i.Location, i.Name)
+}
+
+func NewServiceInfo(namespace, resourceName string) ServiceInfo {
+	return ServiceInfo{namespace, resourceName}
+}
+
+func (i *ServiceInfo) generateK8sResourceDescription() string {
+	return GenerateK8sResourceLink(i.Namespace, "services", i.Name)
+}
 
 func GenerateClusterLink(name, location string, regional bool) string {
 	if name == "" || location == "" {
@@ -33,3 +90,16 @@ func GenerateClusterLink(name, location string, regional bool) string {
 func GenerateK8sResourceLink(namespace, resourceType, resourceName string) string {
 	return fmt.Sprintf("/namespaces/%s/%s/%s", namespace, resourceType, resourceName)
 }
+
+func (i *HealthcheckInfo) GenerateHealthcheckDescription() string {
+	desc := HealthcheckDesc{}
+	desc.K8sCluster = i.ClusterInfo.generateClusterDescription()
+	desc.K8sResource = i.ServiceInfo.generateK8sResourceDescription()
+	desc.K8sResourceDependency = i.IngressType
+	desc.Config = i.HealthcheckConfig
+	json, err := json.MarshalIndent(desc, "", "    ")
+	if err != nil {
+		klog.Error("Failed to marshall HealthcheckDesc %s: %v", desc, err)
+	}
+	return string(json)
+}

pkg/utils/descutils/utils_test.go

@@ -78,3 +78,64 @@ func TestK8sResourceLink(t *testing.T) {
 		t.Errorf("unexpected cluster link: wanted %s, but got %s", expectedLink, generatedLink)
 	}
 }
+
+func TestGenerateClusterDescription(t *testing.T) {
+	testName := "cluster-name"
+	testRegion := "pl-central7"
+	clusterInfo := ClusterInfo{testName, testRegion, true}
+	expectedDescription := "/locations/pl-central7/clusters/cluster-name"
+
+	generatedDescription := clusterInfo.generateClusterDescription()
+	if generatedDescription != expectedDescription {
+		t.Errorf("unexpected cluster description: wanted %s, but got %s", expectedDescription, generatedDescription)
+	}
+
+	testZone := "pl-central7-g"
+	clusterInfo = ClusterInfo{testName, testZone, false}
+	expectedDescription = "/locations/pl-central7-g/clusters/cluster-name"
+
+	generatedDescription = clusterInfo.generateClusterDescription()
+	if generatedDescription != expectedDescription {
+		t.Errorf("unexpected cluster description: wanted %s, but got %s", expectedDescription, generatedDescription)
+	}
+}
+
+func TestGenerateK8sResourceDescription(t *testing.T) {
+	testName := "service-name"
+	testNamespace := "testNamespace"
+	serviceInfo := NewServiceInfo(testNamespace, testName)
+	expectedDescription := "/namespaces/testNamespace/services/service-name"
+
+	generatedDescription := serviceInfo.generateK8sResourceDescription()
+	if generatedDescription != expectedDescription {
+		t.Errorf("unexpected service description: wanted %v, but got %v", expectedDescription, generatedDescription)
+	}
+}
+
+func TestGenerateHealthcheckDescription(t *testing.T) {
+	testCluster := "cluster-name"
+	testRegion := "pl-central7"
+	clusterInfo := ClusterInfo{testCluster, testRegion, true}
+	testService := "service-name"
+	testNamespace := "testNamespace"
+	serviceInfo := NewServiceInfo(testNamespace, testService)
+	hcConfig := DefaultHC
+	i := HealthcheckInfo{
+		ClusterInfo:       clusterInfo,
+		ServiceInfo:       serviceInfo,
+		HealthcheckConfig: hcConfig,
+		IngressType:       InternalLB,
+	}
+	expectedDescription := "" +
+		"{\n" +
+		"    \"K8sCluster\": \"/locations/pl-central7/clusters/cluster-name\",\n" +
+		"    \"K8sResource\": \"/namespaces/testNamespace/services/service-name\",\n" +
+		"    \"K8sResourceDependency\": \"Ingress Internal Load Balancer\",\n" +
+		"    \"Config\": \"Default\"\n" +
+		"}"
+
+	generatedDescription := i.GenerateHealthcheckDescription()
+	if generatedDescription != expectedDescription {
+		t.Errorf("unexpected healthcheck description: wanted %v, but got %v", expectedDescription, generatedDescription)
+	}
+}