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main.go
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main.go
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// 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 (
"net/http"
"os"
"os/signal"
"strconv"
"syscall"
"github.com/gorilla/mux"
"github.com/spf13/cobra"
"github.com/spf13/viper"
jaegerClientConfig "github.com/uber/jaeger-client-go/config"
"github.com/uber/jaeger-lib/metrics/go-kit"
"github.com/uber/jaeger-lib/metrics/go-kit/expvar"
"go.uber.org/zap"
basicB "github.com/uber/jaeger/cmd/builder"
"github.com/uber/jaeger/cmd/flags"
casFlags "github.com/uber/jaeger/cmd/flags/cassandra"
esFlags "github.com/uber/jaeger/cmd/flags/es"
"github.com/uber/jaeger/cmd/query/app"
"github.com/uber/jaeger/cmd/query/app/builder"
"github.com/uber/jaeger/pkg/config"
"github.com/uber/jaeger/pkg/healthcheck"
"github.com/uber/jaeger/pkg/recoveryhandler"
)
func main() {
var serverChannel = make(chan os.Signal, 0)
signal.Notify(serverChannel, os.Interrupt, syscall.SIGTERM)
logger, _ := zap.NewProduction()
casOptions := casFlags.NewOptions("cassandra", "cassandra.archive")
esOptions := esFlags.NewOptions("es", "es.archive")
v := viper.New()
var command = &cobra.Command{
Use: "jaeger-query",
Short: "Jaeger query is a service to access tracing data",
Long: `Jaeger query is a service to access tracing data and host UI.`,
Run: func(cmd *cobra.Command, args []string) {
flags.TryLoadConfigFile(v, logger)
sFlags := new(flags.SharedFlags).InitFromViper(v)
casOptions.InitFromViper(v)
esOptions.InitFromViper(v)
queryOpts := new(builder.QueryOptions).InitFromViper(v)
hc, err := healthcheck.Serve(http.StatusServiceUnavailable, queryOpts.QueryHealthCheckHTTPPort, logger)
if err != nil {
logger.Fatal("Could not start the health check server.", zap.Error(err))
}
metricsFactory := xkit.Wrap("jaeger-query", expvar.NewFactory(10))
tracer, closer, err := jaegerClientConfig.Configuration{
Sampler: &jaegerClientConfig.SamplerConfig{
Type: "probabilistic",
Param: 1.0,
},
RPCMetrics: true,
}.New("jaeger-query", jaegerClientConfig.Metrics(metricsFactory))
if err != nil {
logger.Fatal("Failed to initialize tracer", zap.Error(err))
}
defer closer.Close()
storageBuild, err := builder.NewStorageBuilder(
sFlags.SpanStorage.Type,
sFlags.DependencyStorage.DataFrequency,
basicB.Options.LoggerOption(logger),
basicB.Options.MetricsFactoryOption(metricsFactory),
basicB.Options.CassandraSessionOption(casOptions.GetPrimary()),
basicB.Options.ElasticClientOption(esOptions.GetPrimary()),
)
if err != nil {
logger.Fatal("Failed to init storage builder", zap.Error(err))
}
rHandler := app.NewAPIHandler(
storageBuild.SpanReader,
storageBuild.DependencyReader,
app.HandlerOptions.Prefix(queryOpts.QueryPrefix),
app.HandlerOptions.Logger(logger),
app.HandlerOptions.Tracer(tracer))
sHandler := app.NewStaticAssetsHandler(queryOpts.QueryStaticAssets)
r := mux.NewRouter()
rHandler.RegisterRoutes(r)
sHandler.RegisterRoutes(r)
portStr := ":" + strconv.Itoa(queryOpts.QueryPort)
recoveryHandler := recoveryhandler.NewRecoveryHandler(logger, true)
go func() {
logger.Info("Starting jaeger-query HTTP server", zap.Int("port", queryOpts.QueryPort))
if err := http.ListenAndServe(portStr, recoveryHandler(r)); err != nil {
logger.Fatal("Could not launch service", zap.Error(err))
}
hc.Set(http.StatusInternalServerError)
}()
hc.Ready()
select {
case <-serverChannel:
logger.Info("Jaeger Query is finishing")
}
},
}
config.AddFlags(
v,
command,
flags.AddConfigFileFlag,
flags.AddFlags,
casOptions.AddFlags,
esOptions.AddFlags,
builder.AddFlags,
)
if error := command.Execute(); error != nil {
logger.Fatal(error.Error())
}
}