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otlp.go
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otlp.go
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otlpreceiver
import (
"context"
"net"
"net/http"
"sync"
"github.com/gorilla/mux"
"go.uber.org/zap"
"google.golang.org/grpc"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/component/componenterror"
"go.opentelemetry.io/collector/config/configgrpc"
"go.opentelemetry.io/collector/config/confighttp"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/model/otlp"
"go.opentelemetry.io/collector/model/otlpgrpc"
"go.opentelemetry.io/collector/receiver/otlpreceiver/internal/logs"
"go.opentelemetry.io/collector/receiver/otlpreceiver/internal/metrics"
"go.opentelemetry.io/collector/receiver/otlpreceiver/internal/trace"
)
const (
pbContentType = "application/x-protobuf"
jsonContentType = "application/json"
)
// otlpReceiver is the type that exposes Trace and Metrics reception.
type otlpReceiver struct {
cfg *Config
serverGRPC *grpc.Server
httpMux *mux.Router
serverHTTP *http.Server
traceReceiver *trace.Receiver
metricsReceiver *metrics.Receiver
logReceiver *logs.Receiver
shutdownWG sync.WaitGroup
logger *zap.Logger
}
// newOtlpReceiver just creates the OpenTelemetry receiver services. It is the caller's
// responsibility to invoke the respective Start*Reception methods as well
// as the various Stop*Reception methods to end it.
func newOtlpReceiver(cfg *Config, logger *zap.Logger) *otlpReceiver {
r := &otlpReceiver{
cfg: cfg,
logger: logger,
}
if cfg.HTTP != nil {
r.httpMux = mux.NewRouter()
}
return r
}
func (r *otlpReceiver) startGRPCServer(cfg *configgrpc.GRPCServerSettings, host component.Host) error {
r.logger.Info("Starting GRPC server on endpoint " + cfg.NetAddr.Endpoint)
gln, err := cfg.ToListener()
if err != nil {
return err
}
r.shutdownWG.Add(1)
go func() {
defer r.shutdownWG.Done()
if errGrpc := r.serverGRPC.Serve(gln); errGrpc != nil && errGrpc != grpc.ErrServerStopped {
host.ReportFatalError(errGrpc)
}
}()
return nil
}
func (r *otlpReceiver) startHTTPServer(cfg *confighttp.HTTPServerSettings, host component.Host) error {
r.logger.Info("Starting HTTP server on endpoint " + cfg.Endpoint)
var hln net.Listener
hln, err := r.cfg.HTTP.ToListener()
if err != nil {
return err
}
r.shutdownWG.Add(1)
go func() {
defer r.shutdownWG.Done()
if errHTTP := r.serverHTTP.Serve(hln); errHTTP != http.ErrServerClosed {
host.ReportFatalError(errHTTP)
}
}()
return nil
}
func (r *otlpReceiver) startProtocolServers(host component.Host) error {
var err error
if r.cfg.GRPC != nil {
var opts []grpc.ServerOption
opts, err = r.cfg.GRPC.ToServerOption(host.GetExtensions())
if err != nil {
return err
}
r.serverGRPC = grpc.NewServer(opts...)
if r.traceReceiver != nil {
otlpgrpc.RegisterTracesServer(r.serverGRPC, r.traceReceiver)
}
if r.metricsReceiver != nil {
otlpgrpc.RegisterMetricsServer(r.serverGRPC, r.metricsReceiver)
}
if r.logReceiver != nil {
otlpgrpc.RegisterLogsServer(r.serverGRPC, r.logReceiver)
}
err = r.startGRPCServer(r.cfg.GRPC, host)
if err != nil {
return err
}
if r.cfg.GRPC.NetAddr.Endpoint == defaultGRPCEndpoint {
r.logger.Info("Setting up a second GRPC listener on legacy endpoint " + legacyGRPCEndpoint)
// Copy the config.
cfgLegacyGRPC := r.cfg.GRPC
// And use the legacy endpoint.
cfgLegacyGRPC.NetAddr.Endpoint = legacyGRPCEndpoint
err = r.startGRPCServer(cfgLegacyGRPC, host)
if err != nil {
return err
}
}
}
if r.cfg.HTTP != nil {
r.serverHTTP = r.cfg.HTTP.ToServer(
r.httpMux,
confighttp.WithErrorHandler(errorHandler),
)
err = r.startHTTPServer(r.cfg.HTTP, host)
if err != nil {
return err
}
}
return err
}
// Start runs the trace receiver on the gRPC server. Currently
// it also enables the metrics receiver too.
func (r *otlpReceiver) Start(_ context.Context, host component.Host) error {
return r.startProtocolServers(host)
}
// Shutdown is a method to turn off receiving.
func (r *otlpReceiver) Shutdown(ctx context.Context) error {
var err error
if r.serverHTTP != nil {
err = r.serverHTTP.Shutdown(ctx)
}
if r.serverGRPC != nil {
r.serverGRPC.GracefulStop()
}
r.shutdownWG.Wait()
return err
}
var tracesPbUnmarshaler = otlp.NewProtobufTracesUnmarshaler()
var tracesJSONUnmarshaler = otlp.NewJSONTracesUnmarshaler()
func (r *otlpReceiver) registerTraceConsumer(tc consumer.Traces) error {
if tc == nil {
return componenterror.ErrNilNextConsumer
}
r.traceReceiver = trace.New(r.cfg.ID(), tc)
if r.httpMux != nil {
r.httpMux.HandleFunc("/v1/traces", func(resp http.ResponseWriter, req *http.Request) {
handleTraces(resp, req, pbContentType, r.traceReceiver, tracesPbUnmarshaler)
}).Methods(http.MethodPost).Headers("Content-Type", pbContentType)
// For backwards compatibility see https://github.com/open-telemetry/opentelemetry-collector/issues/1968
r.httpMux.HandleFunc("/v1/trace", func(resp http.ResponseWriter, req *http.Request) {
handleTraces(resp, req, pbContentType, r.traceReceiver, tracesPbUnmarshaler)
}).Methods(http.MethodPost).Headers("Content-Type", pbContentType)
r.httpMux.HandleFunc("/v1/traces", func(resp http.ResponseWriter, req *http.Request) {
handleTraces(resp, req, jsonContentType, r.traceReceiver, tracesJSONUnmarshaler)
}).Methods(http.MethodPost).Headers("Content-Type", jsonContentType)
// For backwards compatibility see https://github.com/open-telemetry/opentelemetry-collector/issues/1968
r.httpMux.HandleFunc("/v1/trace", func(resp http.ResponseWriter, req *http.Request) {
handleTraces(resp, req, jsonContentType, r.traceReceiver, tracesJSONUnmarshaler)
}).Methods(http.MethodPost).Headers("Content-Type", jsonContentType)
}
return nil
}
var metricsPbUnmarshaler = otlp.NewProtobufMetricsUnmarshaler()
var metricsJSONUnmarshaler = otlp.NewJSONMetricsUnmarshaler()
func (r *otlpReceiver) registerMetricsConsumer(mc consumer.Metrics) error {
if mc == nil {
return componenterror.ErrNilNextConsumer
}
r.metricsReceiver = metrics.New(r.cfg.ID(), mc)
if r.httpMux != nil {
r.httpMux.HandleFunc("/v1/metrics", func(resp http.ResponseWriter, req *http.Request) {
handleMetrics(resp, req, pbContentType, r.metricsReceiver, metricsPbUnmarshaler)
}).Methods(http.MethodPost).Headers("Content-Type", pbContentType)
r.httpMux.HandleFunc("/v1/metrics", func(resp http.ResponseWriter, req *http.Request) {
handleMetrics(resp, req, jsonContentType, r.metricsReceiver, metricsJSONUnmarshaler)
}).Methods(http.MethodPost).Headers("Content-Type", jsonContentType)
}
return nil
}
var logsPbUnmarshaler = otlp.NewProtobufLogsUnmarshaler()
var logsJSONUnmarshaler = otlp.NewJSONLogsUnmarshaler()
func (r *otlpReceiver) registerLogsConsumer(lc consumer.Logs) error {
if lc == nil {
return componenterror.ErrNilNextConsumer
}
r.logReceiver = logs.New(r.cfg.ID(), lc)
if r.httpMux != nil {
r.httpMux.HandleFunc("/v1/logs", func(w http.ResponseWriter, req *http.Request) {
handleLogs(w, req, pbContentType, r.logReceiver, logsPbUnmarshaler)
}).Methods(http.MethodPost).Headers("Content-Type", pbContentType)
r.httpMux.HandleFunc("/v1/logs", func(w http.ResponseWriter, req *http.Request) {
handleLogs(w, req, jsonContentType, r.logReceiver, logsJSONUnmarshaler)
}).Methods(http.MethodPost).Headers("Content-Type", jsonContentType)
}
return nil
}