mirror of https://github.com/linkerd/linkerd2.git
140 lines
3.7 KiB
Go
140 lines
3.7 KiB
Go
package servicemirror
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import (
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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logging "github.com/sirupsen/logrus"
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)
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const (
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gatewayNameLabel = "gateway_name"
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gatewayNamespaceLabel = "gateway_namespace"
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gatewayClusterName = "remote_cluster_name"
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eventTypeLabelName = "event_type"
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probeSuccessfulLabel = "probe_successful"
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)
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type probeMetricVecs struct {
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services *prometheus.GaugeVec
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alive *prometheus.GaugeVec
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latencies *prometheus.HistogramVec
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enqueues *prometheus.CounterVec
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dequeues *prometheus.CounterVec
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probes *prometheus.CounterVec
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}
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type probeMetrics struct {
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services prometheus.Gauge
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alive prometheus.Gauge
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latencies prometheus.Observer
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probes *prometheus.CounterVec
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unregister func()
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}
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func newProbeMetricVecs() probeMetricVecs {
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labelNames := []string{gatewayNameLabel, gatewayNamespaceLabel, gatewayClusterName}
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probes := promauto.NewCounterVec(
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prometheus.CounterOpts{
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Name: "gateway_probes",
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Help: "A counter for the number of actual performed probes to a gateway",
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},
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[]string{gatewayNameLabel, gatewayNamespaceLabel, gatewayClusterName, probeSuccessfulLabel},
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)
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enqueues := promauto.NewCounterVec(
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prometheus.CounterOpts{
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Name: "probe_manager_event_enqueues",
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Help: "A counter for the number of enqueued events to the probe manager",
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},
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[]string{eventTypeLabelName},
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)
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dequeues := promauto.NewCounterVec(
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prometheus.CounterOpts{
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Name: "probe_manager_event_dequeues",
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Help: "A counter for the number of dequeued events to the probe manager",
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},
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[]string{eventTypeLabelName},
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)
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services := promauto.NewGaugeVec(
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prometheus.GaugeOpts{
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Name: "num_mirrored_services",
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Help: "A gauge for the current number of mirrored services associated with a gateway",
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},
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labelNames,
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)
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alive := promauto.NewGaugeVec(
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prometheus.GaugeOpts{
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Name: "gateway_alive",
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Help: "A gauge which is 1 if the gateway is alive and 0 if it is not.",
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},
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labelNames,
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)
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latencies := promauto.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: "gateway_probe_latency_ms",
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Help: "A histogram of latencies to a remote gateway.",
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Buckets: []float64{
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1, 2, 3, 4, 5,
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10, 20, 30, 40, 50,
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100, 200, 300, 400, 500,
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1000, 2000, 3000, 4000, 5000,
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10000, 20000, 30000, 40000, 50000,
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},
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},
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labelNames)
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return probeMetricVecs{
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services: services,
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alive: alive,
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latencies: latencies,
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enqueues: enqueues,
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dequeues: dequeues,
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probes: probes,
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}
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}
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func (mv probeMetricVecs) newWorkerMetrics(gatewayNamespace, gatewayName, remoteClusterName string) (*probeMetrics, error) {
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labels := prometheus.Labels{
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gatewayNameLabel: gatewayName,
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gatewayNamespaceLabel: gatewayNamespace,
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gatewayClusterName: remoteClusterName,
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}
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curriedProbes, err := mv.probes.CurryWith(labels)
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if err != nil {
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return nil, err
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}
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return &probeMetrics{
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services: mv.services.With(labels),
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alive: mv.alive.With(labels),
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latencies: mv.latencies.With(labels),
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probes: curriedProbes,
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unregister: func() {
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mv.unregister(gatewayNamespace, gatewayName, remoteClusterName)
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},
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}, nil
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}
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func (mv probeMetricVecs) unregister(gatewayNamespace, gatewayName, remoteClusterName string) {
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labels := prometheus.Labels{
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gatewayNameLabel: gatewayName,
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gatewayNamespaceLabel: gatewayNamespace,
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gatewayClusterName: remoteClusterName,
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}
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if !mv.services.Delete(labels) {
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logging.Warnf("unable to delete num_mirrored_services metric with labels %s", labels)
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}
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if !mv.alive.Delete(labels) {
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logging.Warnf("unable to delete gateway_alive metric with labels %s", labels)
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}
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if !mv.latencies.Delete(labels) {
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logging.Warnf("unable to delete gateway_probe_latency_ms metric with labels %s", labels)
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}
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}
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