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package statesync
import (
"github.com/go-kit/kit/metrics"
"github.com/go-kit/kit/metrics/discard"
"github.com/go-kit/kit/metrics/prometheus"
stdprometheus "github.com/prometheus/client_golang/prometheus"
)
const (
// MetricsSubsystem is a subsystem shared by all metrics exposed by this package.
MetricsSubsystem = "statesync"
)
// Metrics contains metrics exposed by this package.
type Metrics struct {
TotalSnapshots metrics.Counter
ChunkProcessAvgTime metrics.Gauge
SnapshotHeight metrics.Gauge
SnapshotChunk metrics.Counter
SnapshotChunkTotal metrics.Gauge
BackFilledBlocks metrics.Counter
BackFillBlocksTotal metrics.Gauge
}
// PrometheusMetrics returns Metrics build using Prometheus client library.
// Optionally, labels can be provided along with their values ("foo",
// "fooValue").
func PrometheusMetrics(namespace string, labelsAndValues ...string) *Metrics {
labels := []string{}
for i := 0; i < len(labelsAndValues); i += 2 {
labels = append(labels, labelsAndValues[i])
}
return &Metrics{
TotalSnapshots: prometheus.NewCounterFrom(stdprometheus.CounterOpts{
Namespace: namespace,
Subsystem: MetricsSubsystem,
Name: "total_snapshots",
Help: "The total number of snapshots discovered.",
}, labels).With(labelsAndValues...),
ChunkProcessAvgTime: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: namespace,
Subsystem: MetricsSubsystem,
Name: "chunk_process_avg_time",
Help: "The average processing time per chunk.",
}, labels).With(labelsAndValues...),
SnapshotHeight: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: namespace,
Subsystem: MetricsSubsystem,
Name: "snapshot_height",
Help: "The height of the current snapshot the has been processed.",
}, labels).With(labelsAndValues...),
SnapshotChunk: prometheus.NewCounterFrom(stdprometheus.CounterOpts{
Namespace: namespace,
Subsystem: MetricsSubsystem,
Name: "snapshot_chunk",
Help: "The current number of chunks that have been processed.",
}, labels).With(labelsAndValues...),
SnapshotChunkTotal: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: namespace,
Subsystem: MetricsSubsystem,
Name: "snapshot_chunks_total",
Help: "The total number of chunks in the current snapshot.",
}, labels).With(labelsAndValues...),
BackFilledBlocks: prometheus.NewCounterFrom(stdprometheus.CounterOpts{
Namespace: namespace,
Subsystem: MetricsSubsystem,
Name: "backfilled_blocks",
Help: "The current number of blocks that have been back-filled.",
}, labels).With(labelsAndValues...),
BackFillBlocksTotal: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: namespace,
Subsystem: MetricsSubsystem,
Name: "backfilled_blocks_total",
Help: "The total number of blocks that need to be back-filled.",
}, labels).With(labelsAndValues...),
}
}
// NopMetrics returns no-op Metrics.
func NopMetrics() *Metrics {
return &Metrics{
TotalSnapshots: discard.NewCounter(),
ChunkProcessAvgTime: discard.NewGauge(),
SnapshotHeight: discard.NewGauge(),
SnapshotChunk: discard.NewCounter(),
SnapshotChunkTotal: discard.NewGauge(),
BackFilledBlocks: discard.NewCounter(),
BackFillBlocksTotal: discard.NewGauge(),
}
}