prometheus/discovery/kubernetes/service_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

341 lines
10 KiB
Go

// 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"
"fmt"
"testing"
"github.com/prometheus/common/model"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/prometheus/prometheus/discovery/targetgroup"
)
func makeMultiPortService() *v1.Service {
return &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "testservice",
Namespace: "default",
Labels: map[string]string{"test-label": "testvalue"},
Annotations: map[string]string{"test-annotation": "testannotationvalue"},
},
Spec: v1.ServiceSpec{
Ports: []v1.ServicePort{
{
Name: "testport0",
Protocol: v1.ProtocolTCP,
Port: int32(30900),
},
{
Name: "testport1",
Protocol: v1.ProtocolUDP,
Port: int32(30901),
},
},
Type: v1.ServiceTypeClusterIP,
ClusterIP: "10.0.0.1",
},
}
}
func makeSuffixedService(suffix string) *v1.Service {
return &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("testservice%s", suffix),
Namespace: "default",
},
Spec: v1.ServiceSpec{
Ports: []v1.ServicePort{
{
Name: "testport",
Protocol: v1.ProtocolTCP,
Port: int32(30900),
},
},
Type: v1.ServiceTypeClusterIP,
ClusterIP: "10.0.0.1",
},
}
}
func makeService() *v1.Service {
return makeSuffixedService("")
}
func makeExternalService() *v1.Service {
return &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "testservice-external",
Namespace: "default",
},
Spec: v1.ServiceSpec{
Ports: []v1.ServicePort{
{
Name: "testport",
Protocol: v1.ProtocolTCP,
Port: int32(31900),
},
},
Type: v1.ServiceTypeExternalName,
ExternalName: "FooExternalName",
},
}
}
func TestServiceDiscoveryAdd(t *testing.T) {
n, c := makeDiscovery(RoleService, NamespaceDiscovery{})
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := makeService()
c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
obj = makeExternalService()
c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"svc/default/testservice": {
Targets: []model.LabelSet{
{
"__meta_kubernetes_service_port_protocol": "TCP",
"__address__": "testservice.default.svc:30900",
"__meta_kubernetes_service_type": "ClusterIP",
"__meta_kubernetes_service_cluster_ip": "10.0.0.1",
"__meta_kubernetes_service_port_name": "testport",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_service_name": "testservice",
"__meta_kubernetes_namespace": "default",
},
Source: "svc/default/testservice",
},
"svc/default/testservice-external": {
Targets: []model.LabelSet{
{
"__meta_kubernetes_service_port_protocol": "TCP",
"__address__": "testservice-external.default.svc:31900",
"__meta_kubernetes_service_type": "ExternalName",
"__meta_kubernetes_service_port_name": "testport",
"__meta_kubernetes_service_external_name": "FooExternalName",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_service_name": "testservice-external",
"__meta_kubernetes_namespace": "default",
},
Source: "svc/default/testservice-external",
},
},
}.Run(t)
}
func TestServiceDiscoveryDelete(t *testing.T) {
n, c := makeDiscovery(RoleService, NamespaceDiscovery{}, makeService())
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := makeService()
c.CoreV1().Services(obj.Namespace).Delete(context.Background(), obj.Name, metav1.DeleteOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"svc/default/testservice": {
Source: "svc/default/testservice",
},
},
}.Run(t)
}
func TestServiceDiscoveryUpdate(t *testing.T) {
n, c := makeDiscovery(RoleService, NamespaceDiscovery{}, makeService())
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := makeMultiPortService()
c.CoreV1().Services(obj.Namespace).Update(context.Background(), obj, metav1.UpdateOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"svc/default/testservice": {
Targets: []model.LabelSet{
{
"__meta_kubernetes_service_port_protocol": "TCP",
"__address__": "testservice.default.svc:30900",
"__meta_kubernetes_service_type": "ClusterIP",
"__meta_kubernetes_service_cluster_ip": "10.0.0.1",
"__meta_kubernetes_service_port_name": "testport0",
},
{
"__meta_kubernetes_service_port_protocol": "UDP",
"__address__": "testservice.default.svc:30901",
"__meta_kubernetes_service_type": "ClusterIP",
"__meta_kubernetes_service_cluster_ip": "10.0.0.1",
"__meta_kubernetes_service_port_name": "testport1",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_service_name": "testservice",
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_service_label_test_label": "testvalue",
"__meta_kubernetes_service_labelpresent_test_label": "true",
"__meta_kubernetes_service_annotation_test_annotation": "testannotationvalue",
"__meta_kubernetes_service_annotationpresent_test_annotation": "true",
},
Source: "svc/default/testservice",
},
},
}.Run(t)
}
func TestServiceDiscoveryNamespaces(t *testing.T) {
n, c := makeDiscovery(RoleService, NamespaceDiscovery{Names: []string{"ns1", "ns2"}})
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
for _, ns := range []string{"ns1", "ns2"} {
obj := makeService()
obj.Namespace = ns
c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
}
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"svc/ns1/testservice": {
Targets: []model.LabelSet{
{
"__meta_kubernetes_service_port_protocol": "TCP",
"__address__": "testservice.ns1.svc:30900",
"__meta_kubernetes_service_type": "ClusterIP",
"__meta_kubernetes_service_cluster_ip": "10.0.0.1",
"__meta_kubernetes_service_port_name": "testport",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_service_name": "testservice",
"__meta_kubernetes_namespace": "ns1",
},
Source: "svc/ns1/testservice",
},
"svc/ns2/testservice": {
Targets: []model.LabelSet{
{
"__meta_kubernetes_service_port_protocol": "TCP",
"__address__": "testservice.ns2.svc:30900",
"__meta_kubernetes_service_type": "ClusterIP",
"__meta_kubernetes_service_cluster_ip": "10.0.0.1",
"__meta_kubernetes_service_port_name": "testport",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_service_name": "testservice",
"__meta_kubernetes_namespace": "ns2",
},
Source: "svc/ns2/testservice",
},
},
}.Run(t)
}
func TestServiceDiscoveryOwnNamespace(t *testing.T) {
n, c := makeDiscovery(RoleService, NamespaceDiscovery{IncludeOwnNamespace: true})
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
for _, ns := range []string{"own-ns", "non-own-ns"} {
obj := makeService()
obj.Namespace = ns
c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
}
},
expectedMaxItems: 1,
expectedRes: map[string]*targetgroup.Group{
"svc/own-ns/testservice": {
Targets: []model.LabelSet{
{
"__meta_kubernetes_service_port_protocol": "TCP",
"__address__": "testservice.own-ns.svc:30900",
"__meta_kubernetes_service_type": "ClusterIP",
"__meta_kubernetes_service_cluster_ip": "10.0.0.1",
"__meta_kubernetes_service_port_name": "testport",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_service_name": "testservice",
"__meta_kubernetes_namespace": "own-ns",
},
Source: "svc/own-ns/testservice",
},
},
}.Run(t)
}
func TestServiceDiscoveryAllNamespaces(t *testing.T) {
n, c := makeDiscovery(RoleService, NamespaceDiscovery{})
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
for _, ns := range []string{"own-ns", "non-own-ns"} {
obj := makeService()
obj.Namespace = ns
c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
}
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"svc/own-ns/testservice": {
Targets: []model.LabelSet{
{
"__meta_kubernetes_service_port_protocol": "TCP",
"__address__": "testservice.own-ns.svc:30900",
"__meta_kubernetes_service_type": "ClusterIP",
"__meta_kubernetes_service_cluster_ip": "10.0.0.1",
"__meta_kubernetes_service_port_name": "testport",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_service_name": "testservice",
"__meta_kubernetes_namespace": "own-ns",
},
Source: "svc/own-ns/testservice",
},
"svc/non-own-ns/testservice": {
Targets: []model.LabelSet{
{
"__meta_kubernetes_service_port_protocol": "TCP",
"__address__": "testservice.non-own-ns.svc:30900",
"__meta_kubernetes_service_type": "ClusterIP",
"__meta_kubernetes_service_cluster_ip": "10.0.0.1",
"__meta_kubernetes_service_port_name": "testport",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_service_name": "testservice",
"__meta_kubernetes_namespace": "non-own-ns",
},
Source: "svc/non-own-ns/testservice",
},
},
}.Run(t)
}