46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
// +build monitoring
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package monitoring
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import (
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"net/http"
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"sync"
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"google.golang.org/grpc"
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grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
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"github.com/lightningnetwork/lnd/lncfg"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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var started sync.Once
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// GetPromInterceptors returns the set of interceptors for Prometheus
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// monitoring.
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func GetPromInterceptors() ([]grpc.UnaryServerInterceptor, []grpc.StreamServerInterceptor) {
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unaryInterceptors := []grpc.UnaryServerInterceptor{
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grpc_prometheus.UnaryServerInterceptor,
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}
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streamInterceptors := []grpc.StreamServerInterceptor{
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grpc_prometheus.StreamServerInterceptor,
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}
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return unaryInterceptors, streamInterceptors
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}
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// ExportPrometheusMetrics sets server options, registers gRPC metrics and
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// launches the Prometheus exporter on the specified address.
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func ExportPrometheusMetrics(grpcServer *grpc.Server, cfg lncfg.Prometheus) error {
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started.Do(func() {
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log.Infof("Prometheus exporter started on %v/metrics", cfg.Listen)
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grpc_prometheus.Register(grpcServer)
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http.Handle("/metrics", promhttp.Handler())
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go func() {
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http.ListenAndServe(cfg.Listen, nil)
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}()
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})
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return nil
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}
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