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collector.go
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collector.go
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// Copyright (c) 2020 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 app
import (
"context"
"fmt"
"io"
"net/http"
"time"
"go.opentelemetry.io/collector/receiver"
"go.uber.org/zap"
"google.golang.org/grpc"
"github.com/jaegertracing/jaeger/cmd/collector/app/flags"
"github.com/jaegertracing/jaeger/cmd/collector/app/handler"
"github.com/jaegertracing/jaeger/cmd/collector/app/processor"
"github.com/jaegertracing/jaeger/cmd/collector/app/sampling/strategystore"
"github.com/jaegertracing/jaeger/cmd/collector/app/server"
"github.com/jaegertracing/jaeger/pkg/healthcheck"
"github.com/jaegertracing/jaeger/pkg/metrics"
"github.com/jaegertracing/jaeger/pkg/tenancy"
"github.com/jaegertracing/jaeger/storage/spanstore"
)
const (
metricNumWorkers = "collector.num-workers"
metricQueueSize = "collector.queue-size"
)
// Collector returns the collector as a manageable unit of work
type Collector struct {
// required to start a new collector
serviceName string
logger *zap.Logger
metricsFactory metrics.Factory
spanWriter spanstore.Writer
strategyStore strategystore.StrategyStore
aggregator strategystore.Aggregator
hCheck *healthcheck.HealthCheck
spanProcessor processor.SpanProcessor
spanHandlers *SpanHandlers
tenancyMgr *tenancy.Manager
// state, read only
hServer *http.Server
zkServer *http.Server
grpcServer *grpc.Server
otlpReceiver receiver.Traces
tlsGRPCCertWatcherCloser io.Closer
tlsHTTPCertWatcherCloser io.Closer
tlsZipkinCertWatcherCloser io.Closer
}
// CollectorParams to construct a new Jaeger Collector.
type CollectorParams struct {
ServiceName string
Logger *zap.Logger
MetricsFactory metrics.Factory
SpanWriter spanstore.Writer
StrategyStore strategystore.StrategyStore
Aggregator strategystore.Aggregator
HealthCheck *healthcheck.HealthCheck
TenancyMgr *tenancy.Manager
}
// New constructs a new collector component, ready to be started
func New(params *CollectorParams) *Collector {
return &Collector{
serviceName: params.ServiceName,
logger: params.Logger,
metricsFactory: params.MetricsFactory,
spanWriter: params.SpanWriter,
strategyStore: params.StrategyStore,
aggregator: params.Aggregator,
hCheck: params.HealthCheck,
tenancyMgr: params.TenancyMgr,
}
}
// Start the component and underlying dependencies
func (c *Collector) Start(options *flags.CollectorOptions) error {
handlerBuilder := &SpanHandlerBuilder{
SpanWriter: c.spanWriter,
CollectorOpts: options,
Logger: c.logger,
MetricsFactory: c.metricsFactory,
TenancyMgr: c.tenancyMgr,
}
var additionalProcessors []ProcessSpan
if c.aggregator != nil {
additionalProcessors = append(additionalProcessors, handleRootSpan(c.aggregator, c.logger))
}
c.spanProcessor = handlerBuilder.BuildSpanProcessor(additionalProcessors...)
c.spanHandlers = handlerBuilder.BuildHandlers(c.spanProcessor)
grpcServer, err := server.StartGRPCServer(&server.GRPCServerParams{
HostPort: options.GRPC.HostPort,
Handler: c.spanHandlers.GRPCHandler,
TLSConfig: options.GRPC.TLS,
SamplingStore: c.strategyStore,
Logger: c.logger,
MaxReceiveMessageLength: options.GRPC.MaxReceiveMessageLength,
MaxConnectionAge: options.GRPC.MaxConnectionAge,
MaxConnectionAgeGrace: options.GRPC.MaxConnectionAgeGrace,
})
if err != nil {
return fmt.Errorf("could not start gRPC server: %w", err)
}
c.grpcServer = grpcServer
httpServer, err := server.StartHTTPServer(&server.HTTPServerParams{
HostPort: options.HTTP.HostPort,
Handler: c.spanHandlers.JaegerBatchesHandler,
TLSConfig: options.HTTP.TLS,
HealthCheck: c.hCheck,
MetricsFactory: c.metricsFactory,
SamplingStore: c.strategyStore,
Logger: c.logger,
})
if err != nil {
return fmt.Errorf("could not start HTTP server: %w", err)
}
c.hServer = httpServer
c.tlsGRPCCertWatcherCloser = &options.GRPC.TLS
c.tlsHTTPCertWatcherCloser = &options.HTTP.TLS
c.tlsZipkinCertWatcherCloser = &options.Zipkin.TLS
zkServer, err := server.StartZipkinServer(&server.ZipkinServerParams{
HostPort: options.Zipkin.HTTPHostPort,
Handler: c.spanHandlers.ZipkinSpansHandler,
TLSConfig: options.Zipkin.TLS,
HealthCheck: c.hCheck,
CORSConfig: options.Zipkin.CORS,
Logger: c.logger,
MetricsFactory: c.metricsFactory,
KeepAlive: options.Zipkin.KeepAlive,
})
if err != nil {
return fmt.Errorf("could not start Zipkin server: %w", err)
}
c.zkServer = zkServer
if options.OTLP.Enabled {
otlpReceiver, err := handler.StartOTLPReceiver(options, c.logger, c.spanProcessor, c.tenancyMgr)
if err != nil {
return fmt.Errorf("could not start OTLP receiver: %w", err)
}
c.otlpReceiver = otlpReceiver
}
c.publishOpts(options)
return nil
}
func (c *Collector) publishOpts(cOpts *flags.CollectorOptions) {
internalFactory := c.metricsFactory.Namespace(metrics.NSOptions{Name: "internal"})
internalFactory.Gauge(metrics.Options{Name: metricNumWorkers}).Update(int64(cOpts.NumWorkers))
internalFactory.Gauge(metrics.Options{Name: metricQueueSize}).Update(int64(cOpts.QueueSize))
}
// Close the component and all its underlying dependencies
func (c *Collector) Close() error {
// Stop gRPC server
if c.grpcServer != nil {
c.grpcServer.GracefulStop()
}
// Stop HTTP server
if c.hServer != nil {
timeout, cancel := context.WithTimeout(context.Background(), 5*time.Second)
if err := c.hServer.Shutdown(timeout); err != nil {
c.logger.Fatal("failed to stop the main HTTP server", zap.Error(err))
}
defer cancel()
}
// Stop Zipkin server
if c.zkServer != nil {
timeout, cancel := context.WithTimeout(context.Background(), 5*time.Second)
if err := c.zkServer.Shutdown(timeout); err != nil {
c.logger.Fatal("failed to stop the Zipkin server", zap.Error(err))
}
defer cancel()
}
// Stop OpenTelemetry OTLP receiver
if c.otlpReceiver != nil {
timeout, cancel := context.WithTimeout(context.Background(), 5*time.Second)
if err := c.otlpReceiver.Shutdown(timeout); err != nil {
c.logger.Fatal("failed to stop the OTLP receiver", zap.Error(err))
}
defer cancel()
}
if err := c.spanProcessor.Close(); err != nil {
c.logger.Error("failed to close span processor.", zap.Error(err))
}
// aggregator does not exist for all strategy stores. only Close() if exists.
if c.aggregator != nil {
if err := c.aggregator.Close(); err != nil {
c.logger.Error("failed to close aggregator.", zap.Error(err))
}
}
// watchers actually never return errors from Close
_ = c.tlsGRPCCertWatcherCloser.Close()
_ = c.tlsHTTPCertWatcherCloser.Close()
_ = c.tlsZipkinCertWatcherCloser.Close()
return nil
}
// SpanHandlers returns span handlers used by the Collector.
func (c *Collector) SpanHandlers() *SpanHandlers {
return c.spanHandlers
}