mirror of https://github.com/certusone/vouch.git
99 lines
2.5 KiB
Go
99 lines
2.5 KiB
Go
// Copyright © 2021 Attestant Limited.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"context"
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"github.com/attestantio/vouch/services/metrics"
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"github.com/pkg/errors"
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"github.com/prometheus/client_golang/prometheus"
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)
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var metricsNamespace = "vouch"
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var releaseMetric *prometheus.GaugeVec
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var readyMetric prometheus.Gauge
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func registerMetrics(ctx context.Context, monitor metrics.Service) error {
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if releaseMetric != nil {
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// Already registered.
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return nil
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}
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if monitor == nil {
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// No monitor.
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return nil
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}
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switch monitor.Presenter() {
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case "prometheus":
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return registerPrometheusMetrics(ctx)
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case "null":
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log.Debug().Msg("no metrics will be generated for this module")
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}
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return nil
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}
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func registerPrometheusMetrics(ctx context.Context) error {
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startTime := prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: metricsNamespace,
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Name: "start_time_secs",
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Help: "The timestamp at which this instance started.",
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})
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if err := prometheus.Register(startTime); err != nil {
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return errors.Wrap(err, "failed to regsiter start_time_secs")
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}
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startTime.SetToCurrentTime()
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releaseMetric = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: metricsNamespace,
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Name: "release",
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Help: "The release of this instance.",
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}, []string{"version"})
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if err := prometheus.Register(releaseMetric); err != nil {
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return err
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}
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readyMetric = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: metricsNamespace,
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Name: "ready",
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Help: "1 if ready to serve requests, otherwise 0.",
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})
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if err := prometheus.Register(readyMetric); err != nil {
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return errors.Wrap(err, "failed to regsiter ready")
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}
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return nil
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}
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// SetRelease is called when the release version is established.
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func setRelease(ctx context.Context, version string) {
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if releaseMetric == nil {
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return
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}
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releaseMetric.WithLabelValues(version).Set(1)
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}
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func setReady(ctx context.Context, ready bool) {
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if readyMetric == nil {
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return
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}
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if ready {
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readyMetric.Set(1)
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} else {
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readyMetric.Set(0)
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}
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}
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