/
blackboxexporter.go
364 lines (327 loc) · 10.3 KB
/
blackboxexporter.go
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package blackboxexporter
import (
"reflect"
"github.com/openshift/route-monitor-operator/api/v1alpha1"
"github.com/openshift/route-monitor-operator/pkg/consts/blackboxexporter"
"github.com/openshift/route-monitor-operator/pkg/util/finalizer"
"context"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
"sigs.k8s.io/controller-runtime/pkg/client"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
type BlackBoxExporter struct {
Client client.Client
Log logr.Logger
Ctx context.Context
Image string
NamespacedName types.NamespacedName
}
func New(client client.Client, log logr.Logger, ctx context.Context, blackBoxImage string, blackBoxExporterNamespace string) *BlackBoxExporter {
blackboxNamespacedName := types.NamespacedName{Name: blackboxexporter.BlackBoxExporterName, Namespace: blackBoxExporterNamespace}
return &BlackBoxExporter{client, log, ctx, blackBoxImage, blackboxNamespacedName}
}
func (b *BlackBoxExporter) GetBlackBoxExporterNamespace() string {
return b.NamespacedName.Namespace
}
func (b *BlackBoxExporter) ShouldDeleteBlackBoxExporterResources() (blackboxexporter.ShouldDeleteBlackBoxExporter, error) {
objectsDependingOnExporter := []v1.Object{}
routeMonitors := &v1alpha1.RouteMonitorList{}
if err := b.Client.List(b.Ctx, routeMonitors); err != nil {
return blackboxexporter.KeepBlackBoxExporter, err
}
for i := range routeMonitors.Items {
objectsDependingOnExporter = append(objectsDependingOnExporter, &routeMonitors.Items[i])
}
clusterUrlMonitors := &v1alpha1.ClusterUrlMonitorList{}
if err := b.Client.List(b.Ctx, clusterUrlMonitors); err != nil {
return blackboxexporter.KeepBlackBoxExporter, err
}
for i := range clusterUrlMonitors.Items {
objectsDependingOnExporter = append(objectsDependingOnExporter, &clusterUrlMonitors.Items[i])
}
b.Log.V(4).Info("Number of objects depending on BlackBoxExporter:", "amountOfObjects", len(objectsDependingOnExporter))
if len(objectsDependingOnExporter) == 1 && finalizer.WasDeleteRequested(objectsDependingOnExporter[0]) {
b.Log.V(3).Info("Deleting BlackBoxResources: decided to clean BlackBoxExporter resources")
return blackboxexporter.DeleteBlackBoxExporter, nil
}
return blackboxexporter.KeepBlackBoxExporter, nil
}
func (b *BlackBoxExporter) EnsureBlackBoxExporterDeploymentExists() error {
resource := appsv1.Deployment{}
template := b.templateForBlackBoxExporterDeployment(b.Image, b.NamespacedName)
// Does the resource already exist?
err := b.Client.Get(b.Ctx, b.NamespacedName, &resource)
if err != nil {
// If this is an unknown error
if !k8serrors.IsNotFound(err) {
// return unexpectedly
return err
}
// and create it
err = b.Client.Create(b.Ctx, &template)
if err != nil {
return err
}
return nil
}
// Update the deployment if it's different than the template
if !reflect.DeepEqual(resource.Spec, template.Spec) {
resource.ObjectMeta.ResourceVersion = ""
resource.Spec = template.Spec
err = b.Client.Update(b.Ctx, &resource)
if err != nil {
return err
}
}
return nil
}
func (b *BlackBoxExporter) EnsureBlackBoxExporterServiceExists() error {
resource := corev1.Service{}
populationFunc := func() corev1.Service { return templateForBlackBoxExporterService(b.NamespacedName) }
// Does the resource already exist?
if err := b.Client.Get(b.Ctx, b.NamespacedName, &resource); err != nil {
// If this is an unknown error
if !k8serrors.IsNotFound(err) {
// return unexpectedly
return err
}
// populate the resource with the template
resource := populationFunc()
// and create it
if err = b.Client.Create(b.Ctx, &resource); err != nil {
return err
}
}
return nil
}
func (b *BlackBoxExporter) EnsureBlackBoxExporterConfigMapExists() error {
resource := corev1.ConfigMap{}
populationFunc := func() corev1.ConfigMap { return templateForBlackBoxExporterConfigMap(b.NamespacedName) }
// Does the resource already exist?
if err := b.Client.Get(b.Ctx, b.NamespacedName, &resource); err != nil {
// If this is an unknown error
if !k8serrors.IsNotFound(err) {
// return unexpectedly
return err
}
// populate the resource with the template
resource := populationFunc()
// and create it
return b.Client.Create(b.Ctx, &resource)
}
return nil
}
// deploymentForBlackBoxExporter returns a blackbox deployment
func (b *BlackBoxExporter) templateForBlackBoxExporterDeployment(blackBoxImage string, blackBoxNamespacedName types.NamespacedName) appsv1.Deployment {
nodeLabel := "node-role.kubernetes.io/master"
labels := blackboxexporter.GenerateBlackBoxExporterLables()
labelSelectors := metav1.LabelSelector{
MatchLabels: labels}
// hardcode the replicasize for no
// replicas := m.Spec.Size
var replicas int32 = 1
dep := appsv1.Deployment{
ObjectMeta: metav1.ObjectMeta{
Name: blackBoxNamespacedName.Name,
Namespace: blackBoxNamespacedName.Namespace,
Labels: labels,
},
Spec: appsv1.DeploymentSpec{
Replicas: &replicas,
Selector: &labelSelectors,
Template: corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: labels,
},
Spec: corev1.PodSpec{
Affinity: &corev1.Affinity{
NodeAffinity: &corev1.NodeAffinity{
PreferredDuringSchedulingIgnoredDuringExecution: []corev1.PreferredSchedulingTerm{{
Preference: corev1.NodeSelectorTerm{
MatchExpressions: []corev1.NodeSelectorRequirement{{
Key: nodeLabel,
Operator: corev1.NodeSelectorOpExists,
}},
},
Weight: 1,
}},
},
},
Tolerations: []corev1.Toleration{{
Operator: corev1.TolerationOpExists,
Effect: corev1.TaintEffectNoSchedule,
Key: nodeLabel,
}},
Containers: []corev1.Container{{
Image: blackBoxImage,
Name: "blackbox-exporter",
Args: []string{
"--config.file=/config/blackbox.yaml",
},
Ports: []corev1.ContainerPort{{
ContainerPort: blackboxexporter.BlackBoxExporterPortNumber,
Name: blackboxexporter.BlackBoxExporterPortName,
}},
VolumeMounts: []corev1.VolumeMount{
{
Name: "blackbox-config",
ReadOnly: true,
MountPath: "/config",
},
},
}},
Volumes: []corev1.Volume{
{
Name: "blackbox-config",
VolumeSource: corev1.VolumeSource{
ConfigMap: &corev1.ConfigMapVolumeSource{
LocalObjectReference: corev1.LocalObjectReference{
Name: blackBoxNamespacedName.Name,
},
},
},
},
},
},
},
},
}
return dep
}
// templateForBlackBoxExporterService returns a blackbox service
func templateForBlackBoxExporterService(blackboxNamespacedName types.NamespacedName) corev1.Service {
labels := blackboxexporter.GenerateBlackBoxExporterLables()
svc := corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: blackboxNamespacedName.Name,
Namespace: blackboxNamespacedName.Namespace,
Labels: labels,
},
Spec: corev1.ServiceSpec{
Selector: labels,
Ports: []corev1.ServicePort{{
TargetPort: intstr.FromString(blackboxexporter.BlackBoxExporterPortName),
Port: blackboxexporter.BlackBoxExporterPortNumber,
Name: blackboxexporter.BlackBoxExporterPortName,
}},
},
}
return svc
}
func templateForBlackBoxExporterConfigMap(blackboxNamespacedName types.NamespacedName) corev1.ConfigMap {
labels := blackboxexporter.GenerateBlackBoxExporterLables()
cfg := `modules:
http_2xx:
prober: http
timeout: 15s
insecure_http_2xx:
prober: http
timeout: 15s
http:
tls_config:
insecure_skip_verify: true`
cm := corev1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: blackboxNamespacedName.Name,
Namespace: blackboxNamespacedName.Namespace,
Labels: labels,
},
Data: map[string]string{
"blackbox.yaml": cfg,
},
}
return cm
}
func (b *BlackBoxExporter) EnsureBlackBoxExporterDeploymentAbsent() error {
resource := &appsv1.Deployment{}
// Does the resource already exist?
err := b.Client.Get(b.Ctx, b.NamespacedName, resource)
if err != nil {
// If this is an unknown error
if !k8serrors.IsNotFound(err) {
// return unexpectedly
return err
}
// Resource doesn't exist, nothing to do
return nil
}
err = b.Client.Delete(b.Ctx, resource)
if err != nil {
return err
}
return nil
}
func (b *BlackBoxExporter) EnsureBlackBoxExporterServiceAbsent() error {
resource := &corev1.Service{}
// Does the resource already exist?
err := b.Client.Get(b.Ctx, b.NamespacedName, resource)
if err != nil {
// If this is an unknown error
if !k8serrors.IsNotFound(err) {
// return unexpectedly
return err
}
// Resource doesn't exist, nothing to do
return nil
}
err = b.Client.Delete(b.Ctx, resource)
if err != nil {
return err
}
return nil
}
func (b *BlackBoxExporter) EnsureBlackBoxExporterConfigMapAbsent() error {
resource := &corev1.ConfigMap{}
// Does the resource already exist?
err := b.Client.Get(b.Ctx, b.NamespacedName, resource)
if err != nil {
// If this is an unknown error
if !k8serrors.IsNotFound(err) {
// return unexpectedly
return err
}
// Resource doesn't exist, nothing to do
return nil
}
err = b.Client.Delete(b.Ctx, resource)
if err != nil {
return err
}
return nil
}
func (b *BlackBoxExporter) EnsureBlackBoxExporterResourcesAbsent() error {
b.Log.V(2).Info("Entering EnsureBlackBoxExporterServiceAbsent")
if err := b.EnsureBlackBoxExporterServiceAbsent(); err != nil {
return err
}
b.Log.V(2).Info("Entering EnsureBlackBoxExporterDeploymentAbsent")
if err := b.EnsureBlackBoxExporterDeploymentAbsent(); err != nil {
return err
}
b.Log.V(2).Info("Entering EnsureBlackBoxExporterConfigMapAbsent")
if err := b.EnsureBlackBoxExporterConfigMapAbsent(); err != nil {
return err
}
return nil
}
func (b *BlackBoxExporter) EnsureBlackBoxExporterResourcesExist() error {
if err := b.EnsureBlackBoxExporterConfigMapExists(); err != nil {
return err
}
if err := b.EnsureBlackBoxExporterDeploymentExists(); err != nil {
return err
}
// Creating Service after because:
//
// A Service should not point to an empty target (Deployment)
if err := b.EnsureBlackBoxExporterServiceExists(); err != nil {
return err
}
return nil
}