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prometheus/discovery/kubernetes/endpoints_test.go
fpetkovski de87515b24 Implement target discovery in own k8s namespace 
This commit adds support for discovering targets from the same
Kubernetes namespace as the Prometheus pod itself. Own-namespace
discovery can be indicated by using "." as the namespace.

Fixes #9782

Signed-off-by: fpetkovski <filip.petkovsky@gmail.com>
2021-12-14 13:41:38 +01:00

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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"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"github.com/prometheus/prometheus/discovery/targetgroup"
)
func makeEndpoints() *v1.Endpoints {
nodeName := "foobar"
return &v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{
Name: "testendpoints",
Namespace: "default",
},
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,
},
},
},
},
}
}
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",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_endpoints_name": "testendpoints",
},
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",
Ports: []v1.ContainerPort{
{
Name: "mainport",
ContainerPort: 9000,
Protocol: v1.ProtocolTCP,
},
},
},
{
Name: "c2",
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_port_name": "mainport",
"__meta_kubernetes_pod_container_port_number": "9000",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_uid": "deadbeef",
},
{
"__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_port_name": "sideport",
"__meta_kubernetes_pod_container_port_number": "9001",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_uid": "deadbeef",
},
},
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",
},
},
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",
},
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",
},
},
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",
},
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",
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",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "ns1",
"__meta_kubernetes_endpoints_name": "testendpoints",
"__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_port_name": "mainport",
"__meta_kubernetes_pod_container_port_number": "9000",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_uid": "deadbeef",
},
},
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",
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",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_namespace": "own-ns",
"__meta_kubernetes_endpoints_name": "testendpoints",
},
Source: "endpoints/own-ns/testendpoints",
},
},
}.Run(t)
}
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