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metrics.go
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metrics.go
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// Copyright © 2023 Attestant Limited.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package best
import (
"context"
"time"
"github.com/attestantio/vouch/services/metrics"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
)
var (
auctionBlockUsed *prometheus.CounterVec
auctionBlockTimer prometheus.Histogram
)
func registerMetrics(ctx context.Context, monitor metrics.Service) error {
if auctionBlockUsed != nil {
// Already registered.
return nil
}
if monitor == nil {
// No monitor.
return nil
}
if monitor.Presenter() == "prometheus" {
return registerPrometheusMetrics(ctx)
}
return nil
}
func registerPrometheusMetrics(_ context.Context) error {
auctionBlockUsed = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: "vouch",
Subsystem: "relay_auction_block",
Name: "used_total",
Help: "The auction block provider used by a relay.",
}, []string{"provider"})
if err := prometheus.Register(auctionBlockUsed); err != nil {
return errors.Wrap(err, "failed to register vouch_relay_auction_block_used_total")
}
auctionBlockTimer = prometheus.NewHistogram(prometheus.HistogramOpts{
Namespace: "vouch",
Subsystem: "relay_auction_block",
Name: "duration_seconds",
Help: "The time vouch spends in the auction block operation.",
Buckets: []float64{
0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0,
1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0,
2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0,
3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0,
},
})
if err := prometheus.Register(auctionBlockTimer); err != nil {
return errors.Wrap(err, "failed to register vouch_relay_auction_block_duration_seconds")
}
return nil
}
// monitorAuctionBlock provides metrics for an auction block operation.
func monitorAuctionBlock(provider string, succeeded bool, duration time.Duration) {
if auctionBlockUsed == nil {
// Not yet registered.
return
}
auctionBlockTimer.Observe(duration.Seconds())
if succeeded {
auctionBlockUsed.WithLabelValues(provider).Add(1)
}
}