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prometheus/discovery/kubernetes/endpoints_test.go
Giedrius Statkevičius e452308e37 discovery/kubernetes: optimize resolvePodRef 
resolvePodRef is in a hot path:

```
ROUTINE ======================== github.com/prometheus/prometheus/discovery/kubernetes.(*Endpoints).resolvePodRef in discovery/kubernetes/endpoints.go
    2.50TB     2.66TB (flat, cum) 22.28% of Total
         .          .    447:func (e *Endpoints) resolvePodRef(ref *apiv1.ObjectReference) *apiv1.Pod {
         .          .    448:   if ref == nil || ref.Kind != "Pod" {
         .          .    449:           return nil
         .          .    450:   }
    2.50TB     2.50TB    451:   p := &apiv1.Pod{}
         .          .    452:   p.Namespace = ref.Namespace
         .          .    453:   p.Name = ref.Name
         .          .    454:
         .   156.31GB    455:   obj, exists, err := e.podStore.Get(p)
         .          .    456:   if err != nil {
         .          .    457:           level.Error(e.logger).Log("msg", "resolving pod ref failed", "err", err)
         .          .    458:           return nil
         .          .    459:   }
         .          .    460:   if !exists {
```

This is some low hanging fruit that we can easily optimize. The key of
an object has format "namespace/name" so generate that inside of
Prometheus itself and use pooling.

```
goos: linux
goarch: amd64
pkg: github.com/prometheus/prometheus/discovery/kubernetes
cpu: Intel(R) Core(TM) i9-10885H CPU @ 2.40GHz
                 │   olddisc    │               newdisc               │
                 │    sec/op    │   sec/op     vs base                │
ResolvePodRef-16   516.3n ± 17%   289.5n ± 7%  -43.92% (p=0.000 n=10)

                 │   olddisc    │              newdisc               │
                 │     B/op     │    B/op     vs base                │
ResolvePodRef-16   1168.00 ± 0%   24.00 ± 0%  -97.95% (p=0.000 n=10)

                 │  olddisc   │            newdisc             │
                 │ allocs/op  │ allocs/op   vs base            │
ResolvePodRef-16   2.000 ± 0%   2.000 ± 0%  ~ (p=1.000 n=10) ¹
¹ all samples are equal
```

Signed-off-by: Giedrius Statkevičius <giedrius.statkevicius@vinted.com>
2024-10-28 12:12:40 +02:00

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// Copyright 2016 The Prometheus 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 kubernetes
import (
"context"
"testing"
"github.com/prometheus/common/model"
"github.com/stretchr/testify/require"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/tools/cache"
"github.com/prometheus/prometheus/discovery/targetgroup"
)
func makeEndpoints() *v1.Endpoints {
nodeName := "foobar"
return &v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
Annotations: map[string]string{
"test.annotation": "test",
},
},
Subsets: []v1.EndpointSubset{
{
Addresses: []v1.EndpointAddress{
{
IP: "1.2.3.4",
Hostname: "testendpoint1",
NodeName: &nodeName,
},
},
Ports: []v1.EndpointPort{
{
Name: "testport",
Port: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
{
Addresses: []v1.EndpointAddress{
{
IP: "2.3.4.5",
},
},
NotReadyAddresses: []v1.EndpointAddress{
{
IP: "2.3.4.5",
},
},
Ports: []v1.EndpointPort{
{
Name: "testport",
Port: 9001,
Protocol: v1.ProtocolTCP,
},
},
},
{
Addresses: []v1.EndpointAddress{
{
IP: "6.7.8.9",
TargetRef: &v1.ObjectReference{
Kind: "Node",
Name: "barbaz",
},
},
},
Ports: []v1.EndpointPort{
{
Name: "testport",
Port: 9002,
Protocol: v1.ProtocolTCP,
},
},
},
},
}
}
func TestEndpointsDiscoveryBeforeRun(t *testing.T) {
n, c := makeDiscovery(RoleEndpoint, NamespaceDiscovery{})
k8sDiscoveryTest{
discovery: n,
beforeRun: func() {
obj := makeEndpoints()
c.CoreV1().Endpoints(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
},
expectedMaxItems: 1,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpoint_node_name": "foobar",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "false",
},
{
"__address__": "6.7.8.9:9002",
"__meta_kubernetes_endpoint_address_target_kind": "Node",
"__meta_kubernetes_endpoint_address_target_name": "barbaz",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_endpoints_name": "testendpoints",
"__meta_kubernetes_endpoints_annotation_test_annotation": "test",
"__meta_kubernetes_endpoints_annotationpresent_test_annotation": "true",
},
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryAdd(t *testing.T) {
obj := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "default",
UID: types.UID("deadbeef"),
},
Spec: v1.PodSpec{
NodeName: "testnode",
Containers: []v1.Container{
{
Name: "c1",
Image: "c1:latest",
Ports: []v1.ContainerPort{
{
Name: "mainport",
ContainerPort: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
{
Name: "c2",
Image: "c2:latest",
Ports: []v1.ContainerPort{
{
Name: "sideport",
ContainerPort: 9001,
Protocol: v1.ProtocolTCP,
},
},
},
},
},
Status: v1.PodStatus{
HostIP: "2.3.4.5",
PodIP: "1.2.3.4",
},
}
n, c := makeDiscovery(RoleEndpoint, NamespaceDiscovery{}, obj)
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := &v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
},
Subsets: []v1.EndpointSubset{
{
Addresses: []v1.EndpointAddress{
{
IP: "4.3.2.1",
TargetRef: &v1.ObjectReference{
Kind: "Pod",
Name: "testpod",
Namespace: "default",
},
},
},
Ports: []v1.EndpointPort{
{
Name: "testport",
Port: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
},
}
c.CoreV1().Endpoints(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
},
expectedMaxItems: 1,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "4.3.2.1:9000",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
"__meta_kubernetes_endpoint_address_target_kind": "Pod",
"__meta_kubernetes_endpoint_address_target_name": "testpod",
"__meta_kubernetes_pod_name": "testpod",
"__meta_kubernetes_pod_ip": "1.2.3.4",
"__meta_kubernetes_pod_ready": "unknown",
"__meta_kubernetes_pod_phase": "",
"__meta_kubernetes_pod_node_name": "testnode",
"__meta_kubernetes_pod_host_ip": "2.3.4.5",
"__meta_kubernetes_pod_container_name": "c1",
"__meta_kubernetes_pod_container_image": "c1:latest",
"__meta_kubernetes_pod_container_port_name": "mainport",
"__meta_kubernetes_pod_container_port_number": "9000",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_uid": "deadbeef",
"__meta_kubernetes_pod_container_init": "false",
},
{
"__address__": "1.2.3.4:9001",
"__meta_kubernetes_pod_name": "testpod",
"__meta_kubernetes_pod_ip": "1.2.3.4",
"__meta_kubernetes_pod_ready": "unknown",
"__meta_kubernetes_pod_phase": "",
"__meta_kubernetes_pod_node_name": "testnode",
"__meta_kubernetes_pod_host_ip": "2.3.4.5",
"__meta_kubernetes_pod_container_name": "c2",
"__meta_kubernetes_pod_container_image": "c2:latest",
"__meta_kubernetes_pod_container_port_name": "sideport",
"__meta_kubernetes_pod_container_port_number": "9001",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_uid": "deadbeef",
"__meta_kubernetes_pod_container_init": "false",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_endpoints_name": "testendpoints",
"__meta_kubernetes_namespace": "default",
},
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryDelete(t *testing.T) {
n, c := makeDiscovery(RoleEndpoint, NamespaceDiscovery{}, makeEndpoints())
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := makeEndpoints()
c.CoreV1().Endpoints(obj.Namespace).Delete(context.Background(), obj.Name, metav1.DeleteOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryUpdate(t *testing.T) {
n, c := makeDiscovery(RoleEndpoint, NamespaceDiscovery{}, makeEndpoints())
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := &v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
},
Subsets: []v1.EndpointSubset{
{
Addresses: []v1.EndpointAddress{
{
IP: "1.2.3.4",
},
},
Ports: []v1.EndpointPort{
{
Name: "testport",
Port: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
{
Addresses: []v1.EndpointAddress{
{
IP: "2.3.4.5",
},
},
Ports: []v1.EndpointPort{
{
Name: "testport",
Port: 9001,
Protocol: v1.ProtocolTCP,
},
},
},
},
}
c.CoreV1().Endpoints(obj.Namespace).Update(context.Background(), obj, metav1.UpdateOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_endpoints_name": "testendpoints",
},
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryEmptySubsets(t *testing.T) {
n, c := makeDiscovery(RoleEndpoint, NamespaceDiscovery{}, makeEndpoints())
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := &v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
},
Subsets: []v1.EndpointSubset{},
}
c.CoreV1().Endpoints(obj.Namespace).Update(context.Background(), obj, metav1.UpdateOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_endpoints_name": "testendpoints",
},
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryWithService(t *testing.T) {
n, c := makeDiscovery(RoleEndpoint, NamespaceDiscovery{}, makeEndpoints())
k8sDiscoveryTest{
discovery: n,
beforeRun: func() {
obj := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
Labels: map[string]string{
"app/name": "test",
},
},
}
c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
},
expectedMaxItems: 1,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpoint_node_name": "foobar",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "false",
},
{
"__address__": "6.7.8.9:9002",
"__meta_kubernetes_endpoint_address_target_kind": "Node",
"__meta_kubernetes_endpoint_address_target_name": "barbaz",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_endpoints_name": "testendpoints",
"__meta_kubernetes_service_label_app_name": "test",
"__meta_kubernetes_service_labelpresent_app_name": "true",
"__meta_kubernetes_service_name": "testendpoints",
"__meta_kubernetes_endpoints_annotation_test_annotation": "test",
"__meta_kubernetes_endpoints_annotationpresent_test_annotation": "true",
},
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryWithServiceUpdate(t *testing.T) {
n, c := makeDiscovery(RoleEndpoint, NamespaceDiscovery{}, makeEndpoints())
k8sDiscoveryTest{
discovery: n,
beforeRun: func() {
obj := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
Labels: map[string]string{
"app/name": "test",
},
},
}
c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
},
afterStart: func() {
obj := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
Labels: map[string]string{
"app/name": "svc",
"component": "testing",
},
},
}
c.CoreV1().Services(obj.Namespace).Update(context.Background(), obj, metav1.UpdateOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpoint_node_name": "foobar",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "false",
},
{
"__address__": "6.7.8.9:9002",
"__meta_kubernetes_endpoint_address_target_kind": "Node",
"__meta_kubernetes_endpoint_address_target_name": "barbaz",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_endpoints_name": "testendpoints",
"__meta_kubernetes_service_label_app_name": "svc",
"__meta_kubernetes_service_labelpresent_app_name": "true",
"__meta_kubernetes_service_name": "testendpoints",
"__meta_kubernetes_service_label_component": "testing",
"__meta_kubernetes_service_labelpresent_component": "true",
"__meta_kubernetes_endpoints_annotation_test_annotation": "test",
"__meta_kubernetes_endpoints_annotationpresent_test_annotation": "true",
},
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryWithNodeMetadata(t *testing.T) {
metadataConfig := AttachMetadataConfig{Node: true}
nodeLabels1 := map[string]string{"az": "us-east1"}
nodeLabels2 := map[string]string{"az": "us-west2"}
node1 := makeNode("foobar", "", "", nodeLabels1, nil)
node2 := makeNode("barbaz", "", "", nodeLabels2, nil)
svc := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
Labels: map[string]string{
"app/name": "test",
},
},
}
n, _ := makeDiscoveryWithMetadata(RoleEndpoint, NamespaceDiscovery{}, metadataConfig, makeEndpoints(), svc, node1, node2)
k8sDiscoveryTest{
discovery: n,
expectedMaxItems: 1,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpoint_node_name": "foobar",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
"__meta_kubernetes_node_label_az": "us-east1",
"__meta_kubernetes_node_labelpresent_az": "true",
"__meta_kubernetes_node_name": "foobar",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "false",
},
{
"__address__": "6.7.8.9:9002",
"__meta_kubernetes_endpoint_address_target_kind": "Node",
"__meta_kubernetes_endpoint_address_target_name": "barbaz",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
"__meta_kubernetes_node_label_az": "us-west2",
"__meta_kubernetes_node_labelpresent_az": "true",
"__meta_kubernetes_node_name": "barbaz",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_endpoints_name": "testendpoints",
"__meta_kubernetes_service_label_app_name": "test",
"__meta_kubernetes_service_labelpresent_app_name": "true",
"__meta_kubernetes_service_name": "testendpoints",
"__meta_kubernetes_endpoints_annotation_test_annotation": "test",
"__meta_kubernetes_endpoints_annotationpresent_test_annotation": "true",
},
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryWithUpdatedNodeMetadata(t *testing.T) {
nodeLabels1 := map[string]string{"az": "us-east1"}
nodeLabels2 := map[string]string{"az": "us-west2"}
node1 := makeNode("foobar", "", "", nodeLabels1, nil)
node2 := makeNode("barbaz", "", "", nodeLabels2, nil)
metadataConfig := AttachMetadataConfig{Node: true}
svc := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
Labels: map[string]string{
"app/name": "test",
},
},
}
n, c := makeDiscoveryWithMetadata(RoleEndpoint, NamespaceDiscovery{}, metadataConfig, makeEndpoints(), node1, node2, svc)
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
node1.Labels["az"] = "eu-central1"
c.CoreV1().Nodes().Update(context.Background(), node1, metav1.UpdateOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpoint_node_name": "foobar",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
"__meta_kubernetes_node_label_az": "us-east1",
"__meta_kubernetes_node_labelpresent_az": "true",
"__meta_kubernetes_node_name": "foobar",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "false",
},
{
"__address__": "6.7.8.9:9002",
"__meta_kubernetes_endpoint_address_target_kind": "Node",
"__meta_kubernetes_endpoint_address_target_name": "barbaz",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
"__meta_kubernetes_node_label_az": "us-west2",
"__meta_kubernetes_node_labelpresent_az": "true",
"__meta_kubernetes_node_name": "barbaz",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_endpoints_name": "testendpoints",
"__meta_kubernetes_service_label_app_name": "test",
"__meta_kubernetes_service_labelpresent_app_name": "true",
"__meta_kubernetes_service_name": "testendpoints",
"__meta_kubernetes_endpoints_annotation_test_annotation": "test",
"__meta_kubernetes_endpoints_annotationpresent_test_annotation": "true",
},
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryNamespaces(t *testing.T) {
epOne := makeEndpoints()
epOne.Namespace = "ns1"
objs := []runtime.Object{
epOne,
&v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "ns2",
},
Subsets: []v1.EndpointSubset{
{
Addresses: []v1.EndpointAddress{
{
IP: "4.3.2.1",
TargetRef: &v1.ObjectReference{
Kind: "Pod",
Name: "testpod",
Namespace: "ns2",
},
},
},
Ports: []v1.EndpointPort{
{
Name: "testport",
Port: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
},
},
&v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "ns1",
Labels: map[string]string{
"app": "app1",
},
},
},
&v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "ns2",
UID: types.UID("deadbeef"),
},
Spec: v1.PodSpec{
NodeName: "testnode",
Containers: []v1.Container{
{
Name: "c1",
Image: "c1:latest",
Ports: []v1.ContainerPort{
{
Name: "mainport",
ContainerPort: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
},
},
Status: v1.PodStatus{
HostIP: "2.3.4.5",
PodIP: "4.3.2.1",
},
},
}
n, _ := makeDiscovery(RoleEndpoint, NamespaceDiscovery{Names: []string{"ns1", "ns2"}}, objs...)
k8sDiscoveryTest{
discovery: n,
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"endpoints/ns1/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpoint_node_name": "foobar",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "false",
},
{
"__address__": "6.7.8.9:9002",
"__meta_kubernetes_endpoint_address_target_kind": "Node",
"__meta_kubernetes_endpoint_address_target_name": "barbaz",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "ns1",
"__meta_kubernetes_endpoints_name": "testendpoints",
"__meta_kubernetes_endpoints_annotation_test_annotation": "test",
"__meta_kubernetes_endpoints_annotationpresent_test_annotation": "true",
"__meta_kubernetes_service_label_app": "app1",
"__meta_kubernetes_service_labelpresent_app": "true",
"__meta_kubernetes_service_name": "testendpoints",
},
Source: "endpoints/ns1/testendpoints",
},
"endpoints/ns2/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "4.3.2.1:9000",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
"__meta_kubernetes_endpoint_address_target_kind": "Pod",
"__meta_kubernetes_endpoint_address_target_name": "testpod",
"__meta_kubernetes_pod_name": "testpod",
"__meta_kubernetes_pod_ip": "4.3.2.1",
"__meta_kubernetes_pod_ready": "unknown",
"__meta_kubernetes_pod_phase": "",
"__meta_kubernetes_pod_node_name": "testnode",
"__meta_kubernetes_pod_host_ip": "2.3.4.5",
"__meta_kubernetes_pod_container_name": "c1",
"__meta_kubernetes_pod_container_image": "c1:latest",
"__meta_kubernetes_pod_container_port_name": "mainport",
"__meta_kubernetes_pod_container_port_number": "9000",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_uid": "deadbeef",
"__meta_kubernetes_pod_container_init": "false",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "ns2",
"__meta_kubernetes_endpoints_name": "testendpoints",
},
Source: "endpoints/ns2/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryOwnNamespace(t *testing.T) {
epOne := makeEndpoints()
epOne.Namespace = "own-ns"
epTwo := makeEndpoints()
epTwo.Namespace = "non-own-ns"
podOne := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "own-ns",
UID: types.UID("deadbeef"),
},
Spec: v1.PodSpec{
NodeName: "testnode",
Containers: []v1.Container{
{
Name: "p1",
Image: "p1:latest",
Ports: []v1.ContainerPort{
{
Name: "mainport",
ContainerPort: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
},
},
Status: v1.PodStatus{
HostIP: "2.3.4.5",
PodIP: "4.3.2.1",
},
}
podTwo := podOne.DeepCopy()
podTwo.Namespace = "non-own-ns"
objs := []runtime.Object{
epOne,
epTwo,
podOne,
podTwo,
}
n, _ := makeDiscovery(RoleEndpoint, NamespaceDiscovery{IncludeOwnNamespace: true}, objs...)
k8sDiscoveryTest{
discovery: n,
expectedMaxItems: 1,
expectedRes: map[string]*targetgroup.Group{
"endpoints/own-ns/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_endpoint_hostname": "testendpoint1",
"__meta_kubernetes_endpoint_node_name": "foobar",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
{
"__address__": "2.3.4.5:9001",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "false",
},
{
"__address__": "6.7.8.9:9002",
"__meta_kubernetes_endpoint_address_target_kind": "Node",
"__meta_kubernetes_endpoint_address_target_name": "barbaz",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "own-ns",
"__meta_kubernetes_endpoints_name": "testendpoints",
"__meta_kubernetes_endpoints_annotation_test_annotation": "test",
"__meta_kubernetes_endpoints_annotationpresent_test_annotation": "true",
},
Source: "endpoints/own-ns/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoveryEmptyPodStatus(t *testing.T) {
ep := makeEndpoints()
ep.Namespace = "ns"
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "ns",
UID: types.UID("deadbeef"),
},
Spec: v1.PodSpec{
NodeName: "testnode",
Containers: []v1.Container{
{
Name: "p1",
Image: "p1:latest",
Ports: []v1.ContainerPort{
{
Name: "mainport",
ContainerPort: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
},
},
Status: v1.PodStatus{},
}
objs := []runtime.Object{
ep,
pod,
}
n, _ := makeDiscovery(RoleEndpoint, NamespaceDiscovery{IncludeOwnNamespace: true}, objs...)
k8sDiscoveryTest{
discovery: n,
expectedMaxItems: 0,
expectedRes: map[string]*targetgroup.Group{},
}.Run(t)
}
// TestEndpointsDiscoveryUpdatePod makes sure that Endpoints discovery detects underlying Pods changes.
// See https://github.com/prometheus/prometheus/issues/11305 for more details.
func TestEndpointsDiscoveryUpdatePod(t *testing.T) {
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "default",
UID: types.UID("deadbeef"),
},
Spec: v1.PodSpec{
NodeName: "testnode",
Containers: []v1.Container{
{
Name: "c1",
Image: "c1:latest",
Ports: []v1.ContainerPort{
{
Name: "mainport",
ContainerPort: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
},
},
Status: v1.PodStatus{
// Pod is in Pending phase when discovered for first time.
Phase: "Pending",
Conditions: []v1.PodCondition{
{
Type: v1.PodReady,
Status: v1.ConditionFalse,
},
},
HostIP: "2.3.4.5",
PodIP: "4.3.2.1",
},
}
objs := []runtime.Object{
&v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
},
Subsets: []v1.EndpointSubset{
{
Addresses: []v1.EndpointAddress{
{
IP: "4.3.2.1",
// The Pending Pod may be included because the Endpoints was created manually.
// Or because the corresponding service has ".spec.publishNotReadyAddresses: true".
TargetRef: &v1.ObjectReference{
Kind: "Pod",
Name: "testpod",
Namespace: "default",
},
},
},
Ports: []v1.EndpointPort{
{
Name: "mainport",
Port: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
},
},
pod,
}
n, c := makeDiscovery(RoleEndpoint, NamespaceDiscovery{}, objs...)
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
// the Pod becomes Ready.
pod.Status.Phase = "Running"
pod.Status.Conditions = []v1.PodCondition{
{
Type: v1.PodReady,
Status: v1.ConditionTrue,
},
}
c.CoreV1().Pods(pod.Namespace).Update(context.Background(), pod, metav1.UpdateOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testendpoints": {
Targets: []model.LabelSet{
{
"__address__": "4.3.2.1:9000",
"__meta_kubernetes_endpoint_port_name": "mainport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
"__meta_kubernetes_endpoint_address_target_kind": "Pod",
"__meta_kubernetes_endpoint_address_target_name": "testpod",
"__meta_kubernetes_pod_name": "testpod",
"__meta_kubernetes_pod_ip": "4.3.2.1",
"__meta_kubernetes_pod_ready": "true",
"__meta_kubernetes_pod_phase": "Running",
"__meta_kubernetes_pod_node_name": "testnode",
"__meta_kubernetes_pod_host_ip": "2.3.4.5",
"__meta_kubernetes_pod_container_name": "c1",
"__meta_kubernetes_pod_container_image": "c1:latest",
"__meta_kubernetes_pod_container_port_name": "mainport",
"__meta_kubernetes_pod_container_port_number": "9000",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_uid": "deadbeef",
"__meta_kubernetes_pod_container_init": "false",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_endpoints_name": "testendpoints",
},
Source: "endpoints/default/testendpoints",
},
},
}.Run(t)
}
func TestEndpointsDiscoverySidecarContainer(t *testing.T) {
objs := []runtime.Object{
&v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{
Name: "testsidecar",
Namespace: "default",
},
Subsets: []v1.EndpointSubset{
{
Addresses: []v1.EndpointAddress{
{
IP: "4.3.2.1",
TargetRef: &v1.ObjectReference{
Kind: "Pod",
Name: "testpod",
Namespace: "default",
},
},
},
Ports: []v1.EndpointPort{
{
Name: "testport",
Port: 9000,
Protocol: v1.ProtocolTCP,
},
{
Name: "initport",
Port: 9111,
Protocol: v1.ProtocolTCP,
},
},
},
},
},
&v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "default",
UID: types.UID("deadbeef"),
},
Spec: v1.PodSpec{
NodeName: "testnode",
InitContainers: []v1.Container{
{
Name: "ic1",
Image: "ic1:latest",
Ports: []v1.ContainerPort{
{
Name: "initport",
ContainerPort: 1111,
Protocol: v1.ProtocolTCP,
},
},
},
{
Name: "ic2",
Image: "ic2:latest",
Ports: []v1.ContainerPort{
{
Name: "initport",
ContainerPort: 9111,
Protocol: v1.ProtocolTCP,
},
},
},
},
Containers: []v1.Container{
{
Name: "c1",
Image: "c1:latest",
Ports: []v1.ContainerPort{
{
Name: "mainport",
ContainerPort: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
},
},
Status: v1.PodStatus{
HostIP: "2.3.4.5",
PodIP: "4.3.2.1",
},
},
}
n, _ := makeDiscovery(RoleEndpoint, NamespaceDiscovery{}, objs...)
k8sDiscoveryTest{
discovery: n,
expectedMaxItems: 1,
expectedRes: map[string]*targetgroup.Group{
"endpoints/default/testsidecar": {
Targets: []model.LabelSet{
{
"__address__": "4.3.2.1:9000",
"__meta_kubernetes_endpoint_address_target_kind": "Pod",
"__meta_kubernetes_endpoint_address_target_name": "testpod",
"__meta_kubernetes_endpoint_port_name": "testport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
"__meta_kubernetes_pod_container_image": "c1:latest",
"__meta_kubernetes_pod_container_name": "c1",
"__meta_kubernetes_pod_container_port_name": "mainport",
"__meta_kubernetes_pod_container_port_number": "9000",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_host_ip": "2.3.4.5",
"__meta_kubernetes_pod_ip": "4.3.2.1",
"__meta_kubernetes_pod_name": "testpod",
"__meta_kubernetes_pod_node_name": "testnode",
"__meta_kubernetes_pod_phase": "",
"__meta_kubernetes_pod_ready": "unknown",
"__meta_kubernetes_pod_uid": "deadbeef",
"__meta_kubernetes_pod_container_init": "false",
},
{
"__address__": "4.3.2.1:9111",
"__meta_kubernetes_endpoint_address_target_kind": "Pod",
"__meta_kubernetes_endpoint_address_target_name": "testpod",
"__meta_kubernetes_endpoint_port_name": "initport",
"__meta_kubernetes_endpoint_port_protocol": "TCP",
"__meta_kubernetes_endpoint_ready": "true",
"__meta_kubernetes_pod_container_image": "ic2:latest",
"__meta_kubernetes_pod_container_name": "ic2",
"__meta_kubernetes_pod_container_port_name": "initport",
"__meta_kubernetes_pod_container_port_number": "9111",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_host_ip": "2.3.4.5",
"__meta_kubernetes_pod_ip": "4.3.2.1",
"__meta_kubernetes_pod_name": "testpod",
"__meta_kubernetes_pod_node_name": "testnode",
"__meta_kubernetes_pod_phase": "",
"__meta_kubernetes_pod_ready": "unknown",
"__meta_kubernetes_pod_uid": "deadbeef",
"__meta_kubernetes_pod_container_init": "true",
},
{
"__address__": "4.3.2.1:1111",
"__meta_kubernetes_pod_container_image": "ic1:latest",
"__meta_kubernetes_pod_container_name": "ic1",
"__meta_kubernetes_pod_container_port_name": "initport",
"__meta_kubernetes_pod_container_port_number": "1111",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_host_ip": "2.3.4.5",
"__meta_kubernetes_pod_ip": "4.3.2.1",
"__meta_kubernetes_pod_name": "testpod",
"__meta_kubernetes_pod_node_name": "testnode",
"__meta_kubernetes_pod_phase": "",
"__meta_kubernetes_pod_ready": "unknown",
"__meta_kubernetes_pod_uid": "deadbeef",
"__meta_kubernetes_pod_container_init": "true",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_endpoints_name": "testsidecar",
"__meta_kubernetes_namespace": "default",
},
Source: "endpoints/default/testsidecar",
},
},
}.Run(t)
}
func BenchmarkResolvePodRef(b *testing.B) {
indexer := cache.NewIndexer(cache.DeletionHandlingMetaNamespaceKeyFunc, nil)
e := &Endpoints{
podStore: indexer,
}
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
p := e.resolvePodRef(&v1.ObjectReference{
Kind: "Pod",
Name: "testpod",
Namespace: "foo",
})
require.Nil(b, p)
}
}
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