frostfs-node/internal/metrics/grpc.go

package metrics

import (
	"git.frostfs.info/TrueCloudLab/frostfs-observability/metrics"
	"github.com/prometheus/client_golang/prometheus"
)

type GrpcServerMetrics interface {
	MarkHealthy(endpoint string)
	MarkUnhealthy(endpoint string)
}

type grpcServerMetrics struct {
	endpointHealth *prometheus.GaugeVec
}

func newGrpcServerMetrics() *grpcServerMetrics {
	return &grpcServerMetrics{
		endpointHealth: metrics.NewGaugeVec(
			prometheus.GaugeOpts{
				Namespace: namespace,
				Subsystem: grpcServerSubsystem,
				Name:      "health",
				Help:      "GRPC Server Endpoint health",
			}, []string{endpointLabel}),
	}
}

func (m *grpcServerMetrics) MarkHealthy(endpoint string) {
	m.endpointHealth.With(prometheus.Labels{endpointLabel: endpoint}).Set(float64(1))
}

func (m *grpcServerMetrics) MarkUnhealthy(endpoint string) {
	m.endpointHealth.With(prometheus.Labels{endpointLabel: endpoint}).Set(float64(0))
}