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gather_test.go
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/*
Copyright 2024 The K8sHorizMetrics Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package k8shorizmetrics_test
import (
"errors"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"github.com/jthomperoo/k8shorizmetrics/v4"
"github.com/jthomperoo/k8shorizmetrics/v4/internal/fake"
"github.com/jthomperoo/k8shorizmetrics/v4/internal/testutil"
"github.com/jthomperoo/k8shorizmetrics/v4/metrics"
"github.com/jthomperoo/k8shorizmetrics/v4/metrics/external"
"github.com/jthomperoo/k8shorizmetrics/v4/metrics/object"
"github.com/jthomperoo/k8shorizmetrics/v4/metrics/podmetrics"
"github.com/jthomperoo/k8shorizmetrics/v4/metrics/pods"
"github.com/jthomperoo/k8shorizmetrics/v4/metrics/resource"
"github.com/jthomperoo/k8shorizmetrics/v4/metrics/value"
autoscalingv2 "k8s.io/api/autoscaling/v2"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/util/sets"
k8sscale "k8s.io/client-go/scale"
)
func TestGatherSingleMetricWithOptions(t *testing.T) {
equateErrorMessage := cmp.Comparer(func(x, y error) bool {
if x == nil || y == nil {
return x == nil && y == nil
}
return x.Error() == y.Error()
})
var tests = []struct {
description string
expected *metrics.Metric
expectedErr error
resource k8shorizmetrics.ResourceGatherer
pods k8shorizmetrics.PodsGatherer
object k8shorizmetrics.ObjectGatherer
external k8shorizmetrics.ExternalGatherer
scaleClient k8sscale.ScalesGetter
cpuInitializationPeriod time.Duration
delayOfInitialReadinessStatus time.Duration
spec autoscalingv2.MetricSpec
namespace string
podSelector labels.Selector
}{
{
description: "Unknown metric type",
expectedErr: errors.New(`unknown metric source type "unknown"`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.MetricSourceType("unknown"),
},
namespace: "test",
},
{
description: "Object Metric: Fail convert metric selector",
expectedErr: errors.New(`failed to get object metric: "invalid" is not a valid label selector operator`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Operator: "invalid",
},
},
},
},
},
},
namespace: "test",
},
{
description: "Object Metric: No target",
expectedErr: errors.New(`invalid object metric source: must be either value or average value`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
},
},
namespace: "test",
},
{
description: "Object Metric: Target not value or average value",
expectedErr: errors.New(`invalid object metric source: must be either value or average value`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.UtilizationMetricType,
},
},
},
namespace: "test",
},
{
description: "Object Metric: Fail to get value",
expectedErr: errors.New(`failed to get object metric: test error`),
object: &fake.ObjectGatherer{
GatherReactor: func(metricName, namespace string, objectRef *autoscalingv2.CrossVersionObjectReference, podSelector, metricSelector labels.Selector) (*object.Metric, error) {
return nil, errors.New("test error")
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Object Metric: Fail to get average",
expectedErr: errors.New(`failed to get object metric: test error`),
object: &fake.ObjectGatherer{
GatherPerPodReactor: func(metricName, namespace string, objectRef *autoscalingv2.CrossVersionObjectReference, metricSelector labels.Selector) (*object.Metric, error) {
return nil, errors.New("test error")
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Object Metric: Value success",
expected: &metrics.Metric{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
Object: &object.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
},
},
object: &fake.ObjectGatherer{
GatherReactor: func(metricName, namespace string, objectRef *autoscalingv2.CrossVersionObjectReference, podSelector, metricSelector labels.Selector) (*object.Metric, error) {
return &object.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
}, nil
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Object Metric: Average value success",
expected: &metrics.Metric{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
Object: &object.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
},
},
object: &fake.ObjectGatherer{
GatherPerPodReactor: func(metricName, namespace string, objectRef *autoscalingv2.CrossVersionObjectReference, metricSelector labels.Selector) (*object.Metric, error) {
return &object.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
}, nil
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Object Metric: Average Value success",
expected: &metrics.Metric{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
Object: &object.Metric{
Current: value.MetricValue{
AverageValue: testutil.Int64Ptr(1),
},
},
},
object: &fake.ObjectGatherer{
GatherPerPodReactor: func(metricName, namespace string, objectRef *autoscalingv2.CrossVersionObjectReference, metricSelector labels.Selector) (*object.Metric, error) {
return &object.Metric{
Current: value.MetricValue{
AverageValue: testutil.Int64Ptr(1),
},
}, nil
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Pod Metric: Fail convert metric selector",
expectedErr: errors.New(`failed to get pods metric: "invalid" is not a valid label selector operator`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.PodsMetricSourceType,
Pods: &autoscalingv2.PodsMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Operator: "invalid",
},
},
},
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Pods Metric: Target not average value",
expectedErr: errors.New(`invalid pods metric source: must be average value`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.PodsMetricSourceType,
Pods: &autoscalingv2.PodsMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Pods Metric: Fail to get",
expectedErr: errors.New(`failed to get pods metric: test error`),
pods: &fake.PodsGatherer{
GatherReactor: func(metricName, namespace string, podSelector, metricSelector labels.Selector) (*pods.Metric, error) {
return nil, errors.New("test error")
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.PodsMetricSourceType,
Pods: &autoscalingv2.PodsMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Pods Metric: Success",
expected: &metrics.Metric{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.PodsMetricSourceType,
Pods: &autoscalingv2.PodsMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
Pods: &pods.Metric{
ReadyPodCount: 2,
IgnoredPods: sets.String{},
MissingPods: sets.String{},
TotalPods: 2,
Timestamp: time.Time{},
PodMetricsInfo: podmetrics.MetricsInfo{
"test": podmetrics.Metric{
Value: 10,
Timestamp: time.Time{},
},
},
},
},
pods: &fake.PodsGatherer{
GatherReactor: func(metricName, namespace string, podSelector, metricSelector labels.Selector) (*pods.Metric, error) {
return &pods.Metric{
ReadyPodCount: 2,
IgnoredPods: sets.String{},
MissingPods: sets.String{},
TotalPods: 2,
Timestamp: time.Time{},
PodMetricsInfo: podmetrics.MetricsInfo{
"test": podmetrics.Metric{
Value: 10,
Timestamp: time.Time{},
},
},
}, nil
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.PodsMetricSourceType,
Pods: &autoscalingv2.PodsMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Resource Metric: No target",
expectedErr: errors.New(`invalid resource metric source: must be either average value or average utilization`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{},
},
namespace: "test",
},
{
description: "Resource Metric: Target not average value or average utilization",
expectedErr: errors.New(`invalid resource metric source: must be either average value or average utilization`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Resource Metric: Fail to get average value",
expectedErr: errors.New(`failed to get resource metric: test error`),
resource: &fake.ResourceGatherer{
GatherRawReactor: func(resourceName corev1.ResourceName, namespace string, podSelector labels.Selector, cpuInitializationPeriod, delayOfInitialReadinessStatus time.Duration) (*resource.Metric, error) {
return nil, errors.New("test error")
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Resource Metric: Fail to get average utilization",
expectedErr: errors.New(`failed to get resource metric: test error`),
resource: &fake.ResourceGatherer{
GatherReactor: func(resourceName corev1.ResourceName, namespace string, podSelector labels.Selector, cpuInitializationPeriod, delayOfInitialReadinessStatus time.Duration) (*resource.Metric, error) {
return nil, errors.New("test error")
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.UtilizationMetricType,
},
},
},
namespace: "test",
},
{
description: "Resource Metric: Average value success",
expected: &metrics.Metric{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
Resource: &resource.Metric{
ReadyPodCount: 2,
IgnoredPods: sets.String{},
MissingPods: sets.String{},
TotalPods: 2,
Timestamp: time.Time{},
PodMetricsInfo: podmetrics.MetricsInfo{
"test": podmetrics.Metric{
Value: 10,
Timestamp: time.Time{},
},
},
},
},
resource: &fake.ResourceGatherer{
GatherRawReactor: func(resourceName corev1.ResourceName, namespace string, podSelector labels.Selector, cpuInitializationPeriod, delayOfInitialReadinessStatus time.Duration) (*resource.Metric, error) {
return &resource.Metric{
ReadyPodCount: 2,
IgnoredPods: sets.String{},
MissingPods: sets.String{},
TotalPods: 2,
Timestamp: time.Time{},
PodMetricsInfo: podmetrics.MetricsInfo{
"test": podmetrics.Metric{
Value: 10,
Timestamp: time.Time{},
},
},
}, nil
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
{
description: "Resource Metric: Average utilization success",
expected: &metrics.Metric{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.UtilizationMetricType,
},
},
},
Resource: &resource.Metric{
ReadyPodCount: 2,
IgnoredPods: sets.String{},
MissingPods: sets.String{},
TotalPods: 2,
Timestamp: time.Time{},
PodMetricsInfo: podmetrics.MetricsInfo{
"test": podmetrics.Metric{
Value: 10,
Timestamp: time.Time{},
},
},
},
},
resource: &fake.ResourceGatherer{
GatherReactor: func(resourceName corev1.ResourceName, namespace string, podSelector labels.Selector, cpuInitializationPeriod, delayOfInitialReadinessStatus time.Duration) (*resource.Metric, error) {
return &resource.Metric{
ReadyPodCount: 2,
IgnoredPods: sets.String{},
MissingPods: sets.String{},
TotalPods: 2,
Timestamp: time.Time{},
PodMetricsInfo: podmetrics.MetricsInfo{
"test": podmetrics.Metric{
Value: 10,
Timestamp: time.Time{},
},
},
}, nil
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.UtilizationMetricType,
},
},
},
namespace: "test",
},
{
description: "External Metric: No target",
expectedErr: errors.New(`invalid external metric source: must be either value or average value`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ExternalMetricSourceType,
External: &autoscalingv2.ExternalMetricSource{},
},
namespace: "test",
},
{
description: "External Metric: Target not value or average value",
expectedErr: errors.New(`invalid external metric source: must be either value or average value`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ExternalMetricSourceType,
External: &autoscalingv2.ExternalMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.UtilizationMetricType,
},
},
},
namespace: "test",
},
{
description: "External Metric: Fail to get value",
expectedErr: errors.New(`failed to get external metric: test error`),
external: &fake.ExternalGatherer{
GatherReactor: func(metricName, namespace string, metricSelector *metav1.LabelSelector, podSelector labels.Selector) (*external.Metric, error) {
return nil, errors.New("test error")
},
},
scaleClient: nil,
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ExternalMetricSourceType,
External: &autoscalingv2.ExternalMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
namespace: "test",
},
{
description: "External Metric: Fail to get average",
expectedErr: errors.New(`failed to get external metric: test error`),
external: &fake.ExternalGatherer{
GatherPerPodReactor: func(metricName, namespace string, metricSelector *metav1.LabelSelector) (*external.Metric, error) {
return nil, errors.New("test error")
},
},
scaleClient: nil,
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ExternalMetricSourceType,
External: &autoscalingv2.ExternalMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
{
description: "External Metric: Value success",
expected: &metrics.Metric{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ExternalMetricSourceType,
External: &autoscalingv2.ExternalMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
External: &external.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
},
},
external: &fake.ExternalGatherer{
GatherReactor: func(metricName, namespace string, metricSelector *metav1.LabelSelector, podSelector labels.Selector) (*external.Metric, error) {
return &external.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
}, nil
},
},
scaleClient: nil,
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ExternalMetricSourceType,
External: &autoscalingv2.ExternalMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
namespace: "test",
},
{
description: "External Metric: Average value success",
expected: &metrics.Metric{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ExternalMetricSourceType,
External: &autoscalingv2.ExternalMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
External: &external.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
},
},
external: &fake.ExternalGatherer{
GatherPerPodReactor: func(metricName, namespace string, metricSelector *metav1.LabelSelector) (*external.Metric, error) {
return &external.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
}, nil
},
},
scaleClient: nil,
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ExternalMetricSourceType,
External: &autoscalingv2.ExternalMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
namespace: "test",
},
}
for _, test := range tests {
t.Run(test.description, func(t *testing.T) {
gatherer := &k8shorizmetrics.Gatherer{
External: test.external,
Object: test.object,
Pods: test.pods,
Resource: test.resource,
ScaleClient: test.scaleClient,
CPUInitializationPeriod: test.cpuInitializationPeriod,
DelayOfInitialReadinessStatus: test.delayOfInitialReadinessStatus,
}
metric, err := gatherer.GatherSingleMetricWithOptions(test.spec, test.namespace, test.podSelector, test.cpuInitializationPeriod, test.delayOfInitialReadinessStatus)
if !cmp.Equal(&err, &test.expectedErr, equateErrorMessage) {
t.Errorf("error mismatch (-want +got):\n%s", cmp.Diff(test.expectedErr, err, equateErrorMessage))
return
}
if !cmp.Equal(test.expected, metric) {
t.Errorf("metrics mismatch (-want +got):\n%s", cmp.Diff(test.expected, metric))
}
})
}
}
func TestGatherSingleMetric(t *testing.T) {
equateErrorMessage := cmp.Comparer(func(x, y error) bool {
if x == nil || y == nil {
return x == nil && y == nil
}
return x.Error() == y.Error()
})
var tests = []struct {
description string
expected *metrics.Metric
expectedErr error
resource k8shorizmetrics.ResourceGatherer
pods k8shorizmetrics.PodsGatherer
object k8shorizmetrics.ObjectGatherer
external k8shorizmetrics.ExternalGatherer
scaleClient k8sscale.ScalesGetter
cpuInitializationPeriod time.Duration
delayOfInitialReadinessStatus time.Duration
spec autoscalingv2.MetricSpec
namespace string
podSelector labels.Selector
}{
{
description: "Failure",
expectedErr: errors.New(`failed to get object metric: "invalid" is not a valid label selector operator`),
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Operator: "invalid",
},
},
},
},
},
},
namespace: "test",
},
{
description: "Success",
expected: &metrics.Metric{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
Object: &object.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
},
},
object: &fake.ObjectGatherer{
GatherReactor: func(metricName, namespace string, objectRef *autoscalingv2.CrossVersionObjectReference, podSelector, metricSelector labels.Selector) (*object.Metric, error) {
return &object.Metric{
Current: value.MetricValue{
Value: testutil.Int64Ptr(1),
},
}, nil
},
},
cpuInitializationPeriod: 0,
delayOfInitialReadinessStatus: 0,
spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ObjectMetricSourceType,
Object: &autoscalingv2.ObjectMetricSource{
Metric: autoscalingv2.MetricIdentifier{
Selector: metav1.SetAsLabelSelector(labels.Set{}),
},
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.ValueMetricType,
},
},
},
namespace: "test",
},
}
for _, test := range tests {
t.Run(test.description, func(t *testing.T) {
gatherer := &k8shorizmetrics.Gatherer{
External: test.external,
Object: test.object,
Pods: test.pods,
Resource: test.resource,
ScaleClient: test.scaleClient,
CPUInitializationPeriod: test.cpuInitializationPeriod,
DelayOfInitialReadinessStatus: test.delayOfInitialReadinessStatus,
}
metric, err := gatherer.GatherSingleMetric(test.spec, test.namespace, test.podSelector)
if !cmp.Equal(&err, &test.expectedErr, equateErrorMessage) {
t.Errorf("error mismatch (-want +got):\n%s", cmp.Diff(test.expectedErr, err, equateErrorMessage))
return
}
if !cmp.Equal(test.expected, metric) {
t.Errorf("metrics mismatch (-want +got):\n%s", cmp.Diff(test.expected, metric))
}
})
}
}
func TestGatherWithOptions(t *testing.T) {
var tests = []struct {
description string
expected []*metrics.Metric
expectedErr *k8shorizmetrics.GathererMultiMetricError
resource k8shorizmetrics.ResourceGatherer
pods k8shorizmetrics.PodsGatherer
object k8shorizmetrics.ObjectGatherer
external k8shorizmetrics.ExternalGatherer
scaleClient k8sscale.ScalesGetter
specs []autoscalingv2.MetricSpec
namespace string
podSelector labels.Selector
cpuInitializationPeriod time.Duration
delayOfInitialReadinessStatus time.Duration
}{
{
description: "Single spec fail to gather",
expectedErr: &k8shorizmetrics.GathererMultiMetricError{
Partial: false,
Errors: []error{
errors.New(`failed to get resource metric: test error`),
},
},
resource: &fake.ResourceGatherer{
GatherRawReactor: func(resourceName corev1.ResourceName, namespace string, podSelector labels.Selector, cpuInitializationPeriod, delayOfInitialReadinessStatus time.Duration) (*resource.Metric, error) {
return nil, errors.New(`test error`)
},
},
specs: []autoscalingv2.MetricSpec{
{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
},
},
{
description: "Two specs fail to gather both",
expectedErr: &k8shorizmetrics.GathererMultiMetricError{
Partial: false,
Errors: []error{
errors.New(`failed to get resource metric: test error`),
errors.New(`failed to get resource metric: test error`),
},
},
resource: &fake.ResourceGatherer{
GatherRawReactor: func(resourceName corev1.ResourceName, namespace string, podSelector labels.Selector, cpuInitializationPeriod, delayOfInitialReadinessStatus time.Duration) (*resource.Metric, error) {
return nil, errors.New(`test error`)
},
},
specs: []autoscalingv2.MetricSpec{
{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
},
},
{
description: "Two specs fail to gather one, other successful",
expected: []*metrics.Metric{
{
Spec: autoscalingv2.MetricSpec{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Name: "second",
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.AverageValueMetricType,
},
},
},
Resource: &resource.Metric{
ReadyPodCount: 2,
IgnoredPods: sets.String{},
MissingPods: sets.String{},
TotalPods: 2,
Timestamp: time.Time{},
PodMetricsInfo: podmetrics.MetricsInfo{
"test": podmetrics.Metric{
Value: 10,
Timestamp: time.Time{},
},
},
},
},
},
expectedErr: &k8shorizmetrics.GathererMultiMetricError{
Partial: true,
Errors: []error{
errors.New(`failed to get resource metric: test error`),
},
},
resource: &fake.ResourceGatherer{
GatherRawReactor: func(resourceName corev1.ResourceName, namespace string, podSelector labels.Selector, cpuInitializationPeriod, delayOfInitialReadinessStatus time.Duration) (*resource.Metric, error) {
if resourceName == "first" {
return nil, errors.New(`test error`)
}