lnrpc 0.1.0

RPC bindings for github.com/lightningnetwork/lnd
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

// +build monitoring

package monitoring

import (
	"net/http"
	"sync"

	"google.golang.org/grpc"

	"github.com/grpc-ecosystem/go-grpc-prometheus"
	"github.com/lightningnetwork/lnd/lncfg"
	"github.com/prometheus/client_golang/prometheus/promhttp"
)

var started sync.Once

// GetPromInterceptors returns the set of interceptors for Prometheus
// monitoring.
func GetPromInterceptors() ([]grpc.UnaryServerInterceptor, []grpc.StreamServerInterceptor) {
	unaryInterceptors := []grpc.UnaryServerInterceptor{
		grpc_prometheus.UnaryServerInterceptor,
	}
	streamInterceptors := []grpc.StreamServerInterceptor{
		grpc_prometheus.StreamServerInterceptor,
	}
	return unaryInterceptors, streamInterceptors
}

// ExportPrometheusMetrics sets server options, registers gRPC metrics and
// launches the Prometheus exporter on the specified address.
func ExportPrometheusMetrics(grpcServer *grpc.Server, cfg lncfg.Prometheus) error {
	started.Do(func() {
		log.Infof("Prometheus exporter started on %v/metrics", cfg.Listen)

		grpc_prometheus.Register(grpcServer)

		http.Handle("/metrics", promhttp.Handler())
		go func() {
			http.ListenAndServe(cfg.Listen, nil)
		}()
	})

	return nil
}