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main.go
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main.go
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// Copyright (c) 2019 The Jaeger Authors.
// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 main
import (
"fmt"
"io"
"os"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/uber/jaeger-lib/metrics"
_ "go.uber.org/automaxprocs"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/cmd/agent/app"
"github.com/jaegertracing/jaeger/cmd/agent/app/reporter"
"github.com/jaegertracing/jaeger/cmd/agent/app/reporter/grpc"
"github.com/jaegertracing/jaeger/cmd/agent/app/reporter/tchannel"
"github.com/jaegertracing/jaeger/cmd/docs"
"github.com/jaegertracing/jaeger/cmd/flags"
"github.com/jaegertracing/jaeger/pkg/config"
"github.com/jaegertracing/jaeger/pkg/version"
"github.com/jaegertracing/jaeger/ports"
)
func main() {
svc := flags.NewService(ports.AgentAdminHTTP)
svc.NoStorage = true
v := viper.New()
var command = &cobra.Command{
Use: "jaeger-agent",
Short: "Jaeger agent is a local daemon program which collects tracing data.",
Long: `Jaeger agent is a daemon program that runs on every host and receives tracing data submitted by Jaeger client libraries.`,
RunE: func(cmd *cobra.Command, args []string) error {
if err := svc.Start(v); err != nil {
return err
}
logger := svc.Logger // shortcut
mFactory := svc.MetricsFactory.
Namespace(metrics.NSOptions{Name: "jaeger"}).
Namespace(metrics.NSOptions{Name: "agent"})
rOpts := new(reporter.Options).InitFromViper(v, logger)
tchanBuilder := tchannel.NewBuilder().InitFromViper(v, logger)
grpcBuilder := grpc.NewConnBuilder().InitFromViper(v)
cp, err := app.CreateCollectorProxy(rOpts, tchanBuilder, grpcBuilder, logger, mFactory)
if err != nil {
logger.Fatal("Could not create collector proxy", zap.Error(err))
}
// TODO illustrate discovery service wiring
builder := new(app.Builder).InitFromViper(v)
agent, err := builder.CreateAgent(cp, logger, mFactory)
if err != nil {
return fmt.Errorf("unable to initialize Jaeger Agent: %w", err)
}
logger.Info("Starting agent")
if err := agent.Run(); err != nil {
return fmt.Errorf("failed to run the agent: %w", err)
}
svc.RunAndThen(func() {
if closer, ok := cp.(io.Closer); ok {
closer.Close()
}
})
return nil
},
}
command.AddCommand(version.Command())
command.AddCommand(docs.Command(v))
config.AddFlags(
v,
command,
svc.AddFlags,
app.AddFlags,
reporter.AddFlags,
tchannel.AddFlags,
grpc.AddFlags,
)
if err := command.Execute(); err != nil {
fmt.Println(err.Error())
os.Exit(1)
}
}