114 lines
3.2 KiB
Go
114 lines
3.2 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package metrics
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import (
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"context"
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"net"
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"net/http"
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grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
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"github.com/pkg/errors"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"google.golang.org/grpc"
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"gopkg.in/yaml.v3"
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"d7y.io/dragonfly/v2/cdn/config"
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"d7y.io/dragonfly/v2/internal/constants"
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logger "d7y.io/dragonfly/v2/internal/dflog"
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)
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// Variables declared for metrics.
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var (
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DownloadCount = promauto.NewCounter(prometheus.CounterOpts{
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Namespace: constants.MetricsNamespace,
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Subsystem: constants.CDNMetricsName,
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Name: "download_total",
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Help: "Counter of the number of the downloading.",
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})
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DownloadFailureCount = promauto.NewCounter(prometheus.CounterOpts{
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Namespace: constants.MetricsNamespace,
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Subsystem: constants.CDNMetricsName,
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Name: "download_failure_total",
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Help: "Counter of the number of failed of the downloading.",
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})
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DownloadTraffic = promauto.NewCounter(prometheus.CounterOpts{
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Namespace: constants.MetricsNamespace,
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Subsystem: constants.CDNMetricsName,
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Name: "download_traffic",
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Help: "Counter of the number of download traffic.",
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})
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ConcurrentDownloadGauge = promauto.NewGauge(prometheus.GaugeOpts{
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Namespace: constants.MetricsNamespace,
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Subsystem: constants.CDNMetricsName,
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Name: "concurrent_download_total",
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Help: "Gauger of the number of concurrent of the downloading.",
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})
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)
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type Server struct {
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config *config.RestConfig
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httpServer *http.Server
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}
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func New(config *config.RestConfig, rpcServer *grpc.Server) (*Server, error) {
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// scheduler config values
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s, err := yaml.Marshal(config)
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if err != nil {
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return nil, errors.Wrap(err, "marshal metrics server config")
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}
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logger.Infof("metrics server config: \n%s", s)
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grpc_prometheus.Register(rpcServer)
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return &Server{
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config: config,
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httpServer: &http.Server{},
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}, nil
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}
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// Handler returns an http handler for the blob server.
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func (s *Server) Handler() http.Handler {
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mux := http.NewServeMux()
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mux.Handle("/metrics", promhttp.Handler())
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return mux
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}
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// ListenAndServe is a blocking call which runs s.
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func (s *Server) ListenAndServe(h http.Handler) error {
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l, err := net.Listen("tcp", s.config.Addr)
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if err != nil {
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return err
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}
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s.httpServer.Handler = h
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logger.Infof("====starting metrics server at %s====", s.config.Addr)
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err = s.httpServer.Serve(l)
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if errors.Is(err, http.ErrServerClosed) {
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return nil
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}
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return err
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}
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func (s *Server) Shutdown(ctx context.Context) error {
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defer logger.Infof("====stopped metrics server====")
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return s.httpServer.Shutdown(ctx)
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}
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