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Allow non-default registry to be used for metrics of SD components

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Signed-off-by: Paulin Todev <paulin.todev@gmail.com>
This commit is contained in:
Paulin Todev 2023-10-23 14:55:36 +01:00
parent 5082655392
commit 6de80d7fb0
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GPG key ID: 9A127C7452ED9879
70 changed files with 1056 additions and 693 deletions
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69
discovery/kubernetes/kubernetes.go
View file

@ -58,24 +58,14 @@ import (
const (
// metaLabelPrefix is the meta prefix used for all meta labels.
// in this discovery.
metaLabelPrefix = model.MetaLabelPrefix + "kubernetes_"
namespaceLabel = metaLabelPrefix + "namespace"
metricsNamespace = "prometheus_sd_kubernetes"
presentValue = model.LabelValue("true")
metaLabelPrefix = model.MetaLabelPrefix + "kubernetes_"
namespaceLabel = metaLabelPrefix + "namespace"
presentValue = model.LabelValue("true")
)
var (
// Http header.
userAgent = fmt.Sprintf("Prometheus/%s", version.Version)
// Custom events metric.
eventCount = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: metricsNamespace,
Name: "events_total",
Help: "The number of Kubernetes events handled.",
},
[]string{"role", "event"},
)
// DefaultSDConfig is the default Kubernetes SD configuration.
DefaultSDConfig = SDConfig{
HTTPClientConfig: config.DefaultHTTPClientConfig,
@ -84,15 +74,6 @@ var (
func init() {
discovery.RegisterConfig(&SDConfig{})
prometheus.MustRegister(eventCount)
// Initialize metric vectors.
for _, role := range []string{"endpointslice", "endpoints", "node", "pod", "service", "ingress"} {
for _, evt := range []string{"add", "delete", "update"} {
eventCount.WithLabelValues(role, evt)
}
}
(&clientGoRequestMetricAdapter{}).Register(prometheus.DefaultRegisterer)
(&clientGoWorkqueueMetricsProvider{}).Register(prometheus.DefaultRegisterer)
}
// Role is role of the service in Kubernetes.
@ -137,7 +118,7 @@ func (*SDConfig) Name() string { return "kubernetes" }
// NewDiscoverer returns a Discoverer for the Config.
func (c *SDConfig) NewDiscoverer(opts discovery.DiscovererOptions) (discovery.Discoverer, error) {
return New(opts.Logger, c)
return New(opts.Logger, opts.Registerer, c)
}
// SetDirectory joins any relative file paths with dir.
@ -274,6 +255,8 @@ type Discovery struct {
selectors roleSelector
ownNamespace string
attachMetadata AttachMetadataConfig
eventCount *prometheus.CounterVec
metricRegisterer discovery.MetricRegisterer
}
func (d *Discovery) getNamespaces() []string {
@ -292,7 +275,7 @@ func (d *Discovery) getNamespaces() []string {
}
// New creates a new Kubernetes discovery for the given role.
func New(l log.Logger, conf *SDConfig) (*Discovery, error) {
func New(l log.Logger, reg prometheus.Registerer, conf *SDConfig) (*Discovery, error) {
if l == nil {
l = log.NewNopLogger()
}
@ -346,7 +329,7 @@ func New(l log.Logger, conf *SDConfig) (*Discovery, error) {
return nil, err
}
return &Discovery{
d := &Discovery{
client: c,
logger: l,
role: conf.Role,
@ -355,7 +338,26 @@ func New(l log.Logger, conf *SDConfig) (*Discovery, error) {
selectors: mapSelector(conf.Selectors),
ownNamespace: ownNamespace,
attachMetadata: conf.AttachMetadata,
}, nil
eventCount: prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: discovery.KubernetesMetricsNamespace,
Name: "events_total",
Help: "The number of Kubernetes events handled.",
},
[]string{"role", "event"},
),
}
d.metricRegisterer = discovery.NewMetricRegisterer(reg, []prometheus.Collector{d.eventCount})
// Initialize metric vectors.
for _, role := range []string{"endpointslice", "endpoints", "node", "pod", "service", "ingress"} {
for _, evt := range []string{"add", "delete", "update"} {
d.eventCount.WithLabelValues(role, evt)
}
}
return d, nil
}
func mapSelector(rawSelector []SelectorConfig) roleSelector {
@ -391,6 +393,14 @@ const resyncDisabled = 0
// Run implements the discoverer interface.
func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
d.Lock()
err := d.metricRegisterer.RegisterMetrics()
if err != nil {
level.Error(d.logger).Log("msg", "Unable to register metrics", "err", err.Error())
return
}
defer d.metricRegisterer.UnregisterMetrics()
namespaces := d.getNamespaces()
switch d.role {
@ -482,6 +492,7 @@ func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
cache.NewSharedInformer(slw, &apiv1.Service{}, resyncDisabled),
cache.NewSharedInformer(plw, &apiv1.Pod{}, resyncDisabled),
nodeInf,
d.eventCount,
)
d.discoverers = append(d.discoverers, eps)
go eps.endpointSliceInf.Run(ctx.Done())
@ -541,6 +552,7 @@ func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
cache.NewSharedInformer(slw, &apiv1.Service{}, resyncDisabled),
cache.NewSharedInformer(plw, &apiv1.Pod{}, resyncDisabled),
nodeInf,
d.eventCount,
)
d.discoverers = append(d.discoverers, eps)
go eps.endpointsInf.Run(ctx.Done())
@ -572,6 +584,7 @@ func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
log.With(d.logger, "role", "pod"),
d.newPodsByNodeInformer(plw),
nodeInformer,
d.eventCount,
)
d.discoverers = append(d.discoverers, pod)
go pod.podInf.Run(ctx.Done())
@ -594,6 +607,7 @@ func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
svc := NewService(
log.With(d.logger, "role", "service"),
cache.NewSharedInformer(slw, &apiv1.Service{}, resyncDisabled),
d.eventCount,
)
d.discoverers = append(d.discoverers, svc)
go svc.informer.Run(ctx.Done())
@ -651,13 +665,14 @@ func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
ingress := NewIngress(
log.With(d.logger, "role", "ingress"),
informer,
d.eventCount,
)
d.discoverers = append(d.discoverers, ingress)
go ingress.informer.Run(ctx.Done())
}
case RoleNode:
nodeInformer := d.newNodeInformer(ctx)
node := NewNode(log.With(d.logger, "role", "node"), nodeInformer)
node := NewNode(log.With(d.logger, "role", "node"), nodeInformer, d.eventCount)
d.discoverers = append(d.discoverers, node)
go node.informer.Run(ctx.Done())
default: