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otlp_receiver.go
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/
otlp_receiver.go
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// Copyright (c) 2022 The Jaeger 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 handler
import (
"context"
"fmt"
otlp2jaeger "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/jaeger"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/config"
"go.opentelemetry.io/collector/config/configgrpc"
"go.opentelemetry.io/collector/config/confighttp"
"go.opentelemetry.io/collector/config/configtls"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/pdata/ptrace"
"go.opentelemetry.io/collector/receiver/otlpreceiver"
"go.opentelemetry.io/otel"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/cmd/collector/app/flags"
"github.com/jaegertracing/jaeger/cmd/collector/app/processor"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/pkg/config/tlscfg"
"github.com/jaegertracing/jaeger/pkg/tenancy"
)
var _ component.Host = (*otelHost)(nil) // API check
// StartOTLPReceiver starts OpenTelemetry OTLP receiver listening on gRPC and HTTP ports.
func StartOTLPReceiver(options *flags.CollectorOptions, logger *zap.Logger, spanProcessor processor.SpanProcessor, tm *tenancy.Manager) (component.TracesReceiver, error) {
otlpFactory := otlpreceiver.NewFactory()
return startOTLPReceiver(
options,
logger,
spanProcessor,
tm,
otlpFactory,
consumer.NewTraces,
otlpFactory.CreateTracesReceiver,
)
}
// Some of OTELCOL constructor functions return errors when passed nil arguments,
// which is a situation we cannot reproduce. To test our own error handling, this
// function allows to mock those constructors.
func startOTLPReceiver(
options *flags.CollectorOptions,
logger *zap.Logger,
spanProcessor processor.SpanProcessor,
tm *tenancy.Manager,
// from here: params that can be mocked in tests
otlpFactory component.ReceiverFactory,
newTraces func(consume consumer.ConsumeTracesFunc, options ...consumer.Option) (consumer.Traces, error),
createTracesReceiver func(ctx context.Context, set component.ReceiverCreateSettings,
cfg config.Receiver, nextConsumer consumer.Traces) (component.TracesReceiver, error),
) (component.TracesReceiver, error) {
otlpReceiverConfig := otlpFactory.CreateDefaultConfig().(*otlpreceiver.Config)
applyGRPCSettings(otlpReceiverConfig.GRPC, &options.OTLP.GRPC)
applyHTTPSettings(otlpReceiverConfig.HTTP, &options.OTLP.HTTP)
otlpReceiverSettings := component.ReceiverCreateSettings{
TelemetrySettings: component.TelemetrySettings{
Logger: logger,
TracerProvider: otel.GetTracerProvider(), // TODO we may always want no-op here, not the global default
},
}
otlpConsumer := newConsumerDelegate(logger, spanProcessor, tm)
// the following two constructors never return errors given non-nil arguments, so we ignore errors
nextConsumer, err := newTraces(otlpConsumer.consume)
if err != nil {
return nil, fmt.Errorf("could not create the OTLP consumer: %w", err)
}
otlpReceiver, err := createTracesReceiver(
context.Background(),
otlpReceiverSettings,
otlpReceiverConfig,
nextConsumer,
)
if err != nil {
return nil, fmt.Errorf("could not create the OTLP receiver: %w", err)
}
if err := otlpReceiver.Start(context.Background(), &otelHost{logger: logger}); err != nil {
return nil, fmt.Errorf("could not start the OTLP receiver: %w", err)
}
return otlpReceiver, nil
}
func applyGRPCSettings(cfg *configgrpc.GRPCServerSettings, opts *flags.GRPCOptions) {
if opts.HostPort != "" {
cfg.NetAddr.Endpoint = opts.HostPort
}
if opts.TLS.Enabled {
cfg.TLSSetting = applyTLSSettings(&opts.TLS)
}
if opts.MaxReceiveMessageLength > 0 {
cfg.MaxRecvMsgSizeMiB = uint64(opts.MaxReceiveMessageLength / (1024 * 1024))
}
if opts.MaxConnectionAge != 0 || opts.MaxConnectionAgeGrace != 0 {
cfg.Keepalive = &configgrpc.KeepaliveServerConfig{
ServerParameters: &configgrpc.KeepaliveServerParameters{
MaxConnectionAge: opts.MaxConnectionAge,
MaxConnectionAgeGrace: opts.MaxConnectionAgeGrace,
},
}
}
}
func applyHTTPSettings(cfg *confighttp.HTTPServerSettings, opts *flags.HTTPOptions) {
if opts.HostPort != "" {
cfg.Endpoint = opts.HostPort
}
if opts.TLS.Enabled {
cfg.TLSSetting = applyTLSSettings(&opts.TLS)
}
}
func applyTLSSettings(opts *tlscfg.Options) *configtls.TLSServerSetting {
return &configtls.TLSServerSetting{
TLSSetting: configtls.TLSSetting{
CAFile: opts.CAPath,
CertFile: opts.CertPath,
KeyFile: opts.KeyPath,
MinVersion: opts.MinVersion,
MaxVersion: opts.MaxVersion,
},
ClientCAFile: opts.ClientCAPath,
}
}
func newConsumerDelegate(logger *zap.Logger, spanProcessor processor.SpanProcessor, tm *tenancy.Manager) *consumerDelegate {
return &consumerDelegate{
batchConsumer: newBatchConsumer(logger,
spanProcessor,
processor.UnknownTransport, // could be gRPC or HTTP
processor.OTLPSpanFormat,
tm),
protoFromTraces: otlp2jaeger.ProtoFromTraces,
}
}
type consumerDelegate struct {
batchConsumer batchConsumer
protoFromTraces func(td ptrace.Traces) ([]*model.Batch, error)
}
func (c *consumerDelegate) consume(ctx context.Context, td ptrace.Traces) error {
batches, err := c.protoFromTraces(td)
if err != nil {
return err
}
for _, batch := range batches {
err := c.batchConsumer.consume(ctx, batch)
if err != nil {
return err
}
}
return nil
}
// otelHost is a mostly no-op implementation of OTEL component.Host
type otelHost struct {
logger *zap.Logger
}
func (h *otelHost) ReportFatalError(err error) {
h.logger.Fatal("OTLP receiver error", zap.Error(err))
}
func (*otelHost) GetFactory(_ component.Kind, _ config.Type) component.Factory {
return nil
}
func (*otelHost) GetExtensions() map[config.ComponentID]component.Extension {
return nil
}
func (*otelHost) GetExporters() map[config.DataType]map[config.ComponentID]component.Exporter {
return nil
}