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prometheus/discovery/kubernetes/pod_test.go

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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"
"fmt"
"testing"
"github.com/prometheus/common/model"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"github.com/prometheus/prometheus/discovery/targetgroup"
)
func makeOptionalBool(v bool) *bool {
return &v
}
func makeMultiPortPods() *v1.Pod {
return &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "default",
Labels: map[string]string{"test/label": "testvalue"},
Annotations: map[string]string{"test/annotation": "testannotationvalue"},
UID: types.UID("abc123"),
OwnerReferences: []metav1.OwnerReference{
{
Kind: "testcontrollerkind",
Name: "testcontrollername",
Controller: makeOptionalBool(true),
},
},
},
Spec: v1.PodSpec{
NodeName: "testnode",
Containers: []v1.Container{
{
Name: "testcontainer0",
Image: "testcontainer0:latest",
Ports: []v1.ContainerPort{
{
Name: "testport0",
Protocol: v1.ProtocolTCP,
ContainerPort: int32(9000),
},
{
Name: "testport1",
Protocol: v1.ProtocolUDP,
ContainerPort: int32(9001),
},
},
},
{
Name: "testcontainer1",
Image: "testcontainer1:latest",
},
},
},
Status: v1.PodStatus{
PodIP: "1.2.3.4",
HostIP: "2.3.4.5",
Phase: "Running",
Conditions: []v1.PodCondition{
{
Type: v1.PodReady,
Status: v1.ConditionTrue,
},
},
},
}
}
func makePods() *v1.Pod {
return &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "default",
UID: types.UID("abc123"),
},
Spec: v1.PodSpec{
NodeName: "testnode",
Containers: []v1.Container{
{
Name: "testcontainer",
Image: "testcontainer:latest",
Ports: []v1.ContainerPort{
{
Name: "testport",
Protocol: v1.ProtocolTCP,
ContainerPort: int32(9000),
},
},
},
},
},
Status: v1.PodStatus{
PodIP: "1.2.3.4",
HostIP: "2.3.4.5",
Phase: "Running",
Conditions: []v1.PodCondition{
{
Type: v1.PodReady,
Status: v1.ConditionTrue,
},
},
},
}
}
func makeInitContainerPods() *v1.Pod {
return &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "default",
UID: types.UID("abc123"),
},
Spec: v1.PodSpec{
NodeName: "testnode",
Containers: []v1.Container{
{
Name: "testcontainer",
Image: "testcontainer:latest",
Ports: []v1.ContainerPort{
{
Name: "testport",
Protocol: v1.ProtocolTCP,
ContainerPort: int32(9000),
},
},
},
},
InitContainers: []v1.Container{
{
Name: "initcontainer",
Image: "initcontainer:latest",
},
},
},
Status: v1.PodStatus{
PodIP: "1.2.3.4",
HostIP: "2.3.4.5",
Phase: "Pending",
Conditions: []v1.PodCondition{
{
Type: v1.PodReady,
Status: v1.ConditionFalse,
},
},
},
}
}
func expectedPodTargetGroups(ns string) map[string]*targetgroup.Group {
key := fmt.Sprintf("pod/%s/testpod", ns)
return map[string]*targetgroup.Group{
key: {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_pod_container_name": "testcontainer",
"__meta_kubernetes_pod_container_image": "testcontainer:latest",
"__meta_kubernetes_pod_container_port_name": "testport",
"__meta_kubernetes_pod_container_port_number": "9000",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_container_init": "false",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_pod_name": "testpod",
"__meta_kubernetes_namespace": lv(ns),
"__meta_kubernetes_pod_node_name": "testnode",
"__meta_kubernetes_pod_ip": "1.2.3.4",
"__meta_kubernetes_pod_host_ip": "2.3.4.5",
"__meta_kubernetes_pod_ready": "true",
"__meta_kubernetes_pod_phase": "Running",
"__meta_kubernetes_pod_uid": "abc123",
},
Source: key,
},
}
}
func expectedPodTargetGroupsWithNodeMeta(ns, nodeName string, nodeLabels map[string]string) map[string]*targetgroup.Group {
result := expectedPodTargetGroups(ns)
for _, tg := range result {
tg.Labels["__meta_kubernetes_node_name"] = lv(nodeName)
for k, v := range nodeLabels {
tg.Labels[model.LabelName("__meta_kubernetes_node_label_"+k)] = lv(v)
tg.Labels[model.LabelName("__meta_kubernetes_node_labelpresent_"+k)] = lv("true")
}
}
return result
}
func TestPodDiscoveryBeforeRun(t *testing.T) {
n, c := makeDiscovery(RolePod, NamespaceDiscovery{})
k8sDiscoveryTest{
discovery: n,
beforeRun: func() {
obj := makeMultiPortPods()
c.CoreV1().Pods(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
},
expectedMaxItems: 1,
expectedRes: map[string]*targetgroup.Group{
"pod/default/testpod": {
Targets: []model.LabelSet{
{
"__address__": "1.2.3.4:9000",
"__meta_kubernetes_pod_container_name": "testcontainer0",
"__meta_kubernetes_pod_container_image": "testcontainer0:latest",
"__meta_kubernetes_pod_container_port_name": "testport0",
"__meta_kubernetes_pod_container_port_number": "9000",
"__meta_kubernetes_pod_container_port_protocol": "TCP",
"__meta_kubernetes_pod_container_init": "false",
},
{
"__address__": "1.2.3.4:9001",
"__meta_kubernetes_pod_container_name": "testcontainer0",
"__meta_kubernetes_pod_container_image": "testcontainer0:latest",
"__meta_kubernetes_pod_container_port_name": "testport1",
"__meta_kubernetes_pod_container_port_number": "9001",
"__meta_kubernetes_pod_container_port_protocol": "UDP",
"__meta_kubernetes_pod_container_init": "false",
},
{
"__address__": "1.2.3.4",
"__meta_kubernetes_pod_container_name": "testcontainer1",
"__meta_kubernetes_pod_container_image": "testcontainer1:latest",
"__meta_kubernetes_pod_container_init": "false",
},
},
Labels: model.LabelSet{
"__meta_kubernetes_pod_name": "testpod",
"__meta_kubernetes_namespace": "default",
"__meta_kubernetes_pod_label_test_label": "testvalue",
"__meta_kubernetes_pod_labelpresent_test_label": "true",
"__meta_kubernetes_pod_annotation_test_annotation": "testannotationvalue",
"__meta_kubernetes_pod_annotationpresent_test_annotation": "true",
"__meta_kubernetes_pod_node_name": "testnode",
"__meta_kubernetes_pod_ip": "1.2.3.4",
"__meta_kubernetes_pod_host_ip": "2.3.4.5",
"__meta_kubernetes_pod_ready": "true",
"__meta_kubernetes_pod_phase": "Running",
"__meta_kubernetes_pod_uid": "abc123",
"__meta_kubernetes_pod_controller_kind": "testcontrollerkind",
"__meta_kubernetes_pod_controller_name": "testcontrollername",
},
Source: "pod/default/testpod",
},
},
}.Run(t)
}
func TestPodDiscoveryInitContainer(t *testing.T) {
n, c := makeDiscovery(RolePod, NamespaceDiscovery{})
ns := "default"
key := fmt.Sprintf("pod/%s/testpod", ns)
expected := expectedPodTargetGroups(ns)
expected[key].Targets = append(expected[key].Targets, model.LabelSet{
"__address__": "1.2.3.4",
"__meta_kubernetes_pod_container_name": "initcontainer",
"__meta_kubernetes_pod_container_image": "initcontainer:latest",
"__meta_kubernetes_pod_container_init": "true",
})
expected[key].Labels["__meta_kubernetes_pod_phase"] = "Pending"
expected[key].Labels["__meta_kubernetes_pod_ready"] = "false"
k8sDiscoveryTest{
discovery: n,
beforeRun: func() {
obj := makeInitContainerPods()
c.CoreV1().Pods(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
},
expectedMaxItems: 1,
expectedRes: expected,
}.Run(t)
}
func TestPodDiscoveryAdd(t *testing.T) {
n, c := makeDiscovery(RolePod, NamespaceDiscovery{})
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := makePods()
c.CoreV1().Pods(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
},
expectedMaxItems: 1,
expectedRes: expectedPodTargetGroups("default"),
}.Run(t)
}
func TestPodDiscoveryDelete(t *testing.T) {
obj := makePods()
n, c := makeDiscovery(RolePod, NamespaceDiscovery{}, obj)
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := makePods()
c.CoreV1().Pods(obj.Namespace).Delete(context.Background(), obj.Name, metav1.DeleteOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"pod/default/testpod": {
Source: "pod/default/testpod",
},
},
}.Run(t)
}
func TestPodDiscoveryUpdate(t *testing.T) {
obj := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "testpod",
Namespace: "default",
UID: "xyz321",
},
Spec: v1.PodSpec{
NodeName: "testnode",
Containers: []v1.Container{
{
Name: "testcontainer",
Image: "testcontainer:latest",
Ports: []v1.ContainerPort{
{
Name: "testport",
Protocol: v1.ProtocolTCP,
ContainerPort: int32(9000),
},
},
},
},
},
Status: v1.PodStatus{
PodIP: "1.2.3.4",
HostIP: "2.3.4.5",
},
}
n, c := makeDiscovery(RolePod, NamespaceDiscovery{}, obj)
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
obj := makePods()
c.CoreV1().Pods(obj.Namespace).Update(context.Background(), obj, metav1.UpdateOptions{})
},
expectedMaxItems: 2,
expectedRes: expectedPodTargetGroups("default"),
}.Run(t)
}
func TestPodDiscoveryUpdateEmptyPodIP(t *testing.T) {
n, c := makeDiscovery(RolePod, NamespaceDiscovery{})
initialPod := makePods()
updatedPod := makePods()
updatedPod.Status.PodIP = ""
k8sDiscoveryTest{
discovery: n,
beforeRun: func() {
c.CoreV1().Pods(initialPod.Namespace).Create(context.Background(), initialPod, metav1.CreateOptions{})
},
afterStart: func() {
c.CoreV1().Pods(updatedPod.Namespace).Update(context.Background(), updatedPod, metav1.UpdateOptions{})
},
expectedMaxItems: 2,
expectedRes: map[string]*targetgroup.Group{
"pod/default/testpod": {
Source: "pod/default/testpod",
},
},
}.Run(t)
}
func TestPodDiscoveryNamespaces(t *testing.T) {
n, c := makeDiscovery(RolePod, NamespaceDiscovery{Names: []string{"ns1", "ns2"}})
expected := expectedPodTargetGroups("ns1")
for k, v := range expectedPodTargetGroups("ns2") {
expected[k] = v
}
k8sDiscoveryTest{
discovery: n,
beforeRun: func() {
for _, ns := range []string{"ns1", "ns2"} {
pod := makePods()
pod.Namespace = ns
c.CoreV1().Pods(pod.Namespace).Create(context.Background(), pod, metav1.CreateOptions{})
}
},
expectedMaxItems: 2,
expectedRes: expected,
}.Run(t)
}
func TestPodDiscoveryOwnNamespace(t *testing.T) {
n, c := makeDiscovery(RolePod, NamespaceDiscovery{IncludeOwnNamespace: true})
expected := expectedPodTargetGroups("own-ns")
k8sDiscoveryTest{
discovery: n,
beforeRun: func() {
for _, ns := range []string{"own-ns", "non-own-ns"} {
pod := makePods()
pod.Namespace = ns
c.CoreV1().Pods(pod.Namespace).Create(context.Background(), pod, metav1.CreateOptions{})
}
},
expectedMaxItems: 1,
expectedRes: expected,
}.Run(t)
}
func TestPodDiscoveryWithNodeMetadata(t *testing.T) {
attachMetadata := AttachMetadataConfig{Node: true}
n, c := makeDiscoveryWithMetadata(RolePod, NamespaceDiscovery{}, attachMetadata)
nodeLbls := map[string]string{"l1": "v1"}
k8sDiscoveryTest{
discovery: n,
afterStart: func() {
nodes := makeNode("testnode", "", "", nodeLbls, nil)
c.CoreV1().Nodes().Create(context.Background(), nodes, metav1.CreateOptions{})
pods := makePods()
c.CoreV1().Pods(pods.Namespace).Create(context.Background(), pods, metav1.CreateOptions{})
},
expectedMaxItems: 2,
expectedRes: expectedPodTargetGroupsWithNodeMeta("default", "testnode", nodeLbls),
}.Run(t)
}
func TestPodDiscoveryWithNodeMetadataUpdateNode(t *testing.T) {
nodeLbls := map[string]string{"l2": "v2"}
attachMetadata := AttachMetadataConfig{Node: true}
n, c := makeDiscoveryWithMetadata(RolePod, NamespaceDiscovery{}, attachMetadata)
k8sDiscoveryTest{
discovery: n,
beforeRun: func() {
oldNodeLbls := map[string]string{"l1": "v1"}
nodes := makeNode("testnode", "", "", oldNodeLbls, nil)
c.CoreV1().Nodes().Create(context.Background(), nodes, metav1.CreateOptions{})
},
afterStart: func() {
pods := makePods()
c.CoreV1().Pods(pods.Namespace).Create(context.Background(), pods, metav1.CreateOptions{})
nodes := makeNode("testnode", "", "", nodeLbls, nil)
c.CoreV1().Nodes().Update(context.Background(), nodes, metav1.UpdateOptions{})
},
expectedMaxItems: 2,
expectedRes: expectedPodTargetGroupsWithNodeMeta("default", "testnode", nodeLbls),
}.Run(t)
}