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100 lines
3.2 KiB
Go
100 lines
3.2 KiB
Go
// Package metrics provides an abstraction around metrics collection
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// in order to bundle all metrics related calls in one location
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package metrics
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import (
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"net/http"
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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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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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const (
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metricSecretsCreated = "secrets_created"
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metricSecretsRead = "secrets_read"
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metricSecretsCreateErrors = "secrets_create_errors"
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meticsSecretsReadErrors = "secrets_read_errors"
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metricsSecretsStored = "secrets_stored"
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labelReason = "reason"
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namespace = "ots"
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)
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type (
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// Collector contains all required methods to collect metrics
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// and to populate them into the Handler
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Collector struct {
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secretsCreated prometheus.Counter
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secretsRead prometheus.Counter
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secretsCreateErrors *prometheus.CounterVec
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secretsReadErrors *prometheus.CounterVec
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secretsStored prometheus.Gauge
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}
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)
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// Handler returns the handler to be registered at /metrics
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func Handler() http.Handler { return promhttp.Handler() }
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// New creates a new Collector and registers the metrics
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func New() *Collector {
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return &Collector{
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secretsCreated: promauto.NewCounter(prometheus.CounterOpts{
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Namespace: namespace,
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Name: metricSecretsCreated,
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Help: "number of successfully created secrets",
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}),
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secretsRead: promauto.NewCounter(prometheus.CounterOpts{
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Namespace: namespace,
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Name: metricSecretsRead,
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Help: "number of fetched (and destroyed) secrets",
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}),
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secretsCreateErrors: promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: namespace,
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Name: metricSecretsCreateErrors,
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Help: "number of errors on secret creation for each reason",
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}, []string{labelReason}),
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secretsReadErrors: promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: namespace,
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Name: meticsSecretsReadErrors,
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Help: "number of read-errors for each reason",
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}, []string{labelReason}),
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secretsStored: promauto.NewGauge(prometheus.GaugeOpts{
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Namespace: namespace,
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Name: metricsSecretsStored,
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Help: "number of secrets currently held in the backend store",
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}),
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}
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}
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// CountSecretCreated signalizes a secret has successfully been created
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func (c Collector) CountSecretCreated() { c.secretsCreated.Inc() }
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// CountSecretRead signalizes a secret has successfully been read and destroyed
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func (c Collector) CountSecretRead() { c.secretsRead.Inc() }
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// CountSecretCreateError signalizes an error occurred during secret
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// creation. The reason must not be the error.Error() but a simple
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// static string describing the error.
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func (c Collector) CountSecretCreateError(reason string) {
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c.secretsCreateErrors.WithLabelValues(reason).Inc()
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}
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// CountSecretReadError signalizes an error occurred during secret
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// read. The reason must not be the error.Error() but a simple
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// static string describing the error.
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func (c Collector) CountSecretReadError(reason string) {
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c.secretsReadErrors.WithLabelValues(reason).Inc()
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}
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// UpdateSecretsCount sets the current amount of secrets stored in the
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// backend storage
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func (c Collector) UpdateSecretsCount(count int64) {
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c.secretsStored.Set(float64(count))
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}
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