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main.go
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main.go
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package main
import (
"fmt"
"os"
"os/signal"
"time"
"github.com/cactus/go-statsd-client/v5/statsd"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"golang.org/x/crypto/ssh/terminal"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer"
_ "gopkg.in/relistan/rubberneck.v1"
"github.com/streamdal/streamdal/apps/server/apis/grpcapi"
"github.com/streamdal/streamdal/apps/server/apis/httpapi"
"github.com/streamdal/streamdal/apps/server/config"
"github.com/streamdal/streamdal/apps/server/deps"
)
var (
version = "No version specified"
)
func main() {
cfg := config.New(version)
logLevel, err := logrus.ParseLevel(cfg.LogLevel)
if err != nil {
logrus.Fatalf("Failed to parse log level: %v", err)
}
if cfg.Debug {
logLevel = logrus.DebugLevel
}
logrus.SetLevel(logLevel)
// Start DataDog tracer
if os.Getenv("DD_ENV") != "" {
tracer.Start(tracer.WithAnalytics(true))
defer tracer.Stop()
}
// JSON formatter for log output if not running in a TTY
// because loggers likes JSON but humans like colors
if !terminal.IsTerminal(int(os.Stderr.Fd())) {
logrus.SetFormatter(&logrus.JSONFormatter{})
}
log := logrus.WithField("method", "main")
d, err := deps.New(cfg)
if err != nil {
log.WithError(err).Fatal("could not setup dependencies")
}
logrus.Infof("Install ID: '%s'", d.Config.InstallID)
logrus.Infof("Node ID: '%s'", d.Config.NodeID)
logrus.Infof("Telemetry Disabled: %t", d.Config.TelemetryDisable)
// Clean up telemetry on shutdown
defer func(Telemetry statsd.Statter) {
if err := Telemetry.Close(); err != nil {
logrus.Error(err)
}
}(d.Telemetry)
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
signal.Notify(c, os.Kill)
go func() {
sig := <-c
logrus.Debugf("Received system call: %+v", sig)
logrus.Info("Shutting down Streamdal server...")
d.ShutdownFunc()
}()
if err := run(d); err != nil {
log.Fatal(err)
}
}
func run(d *deps.Dependencies) error {
errChan := make(chan error, 1)
// Run gRPC server
go func() {
api, err := grpcapi.New(&grpcapi.Options{
Config: d.Config,
StoreService: d.StoreService,
BusService: d.BusService,
ShutdownContext: d.ShutdownContext,
CmdService: d.CmdService,
NotifyService: d.NotifyService,
RedisBackend: d.RedisBackend,
PubSubService: d.PubSubService,
MetricsService: d.MetricsService,
KVService: d.KVService,
DemoMode: d.Config.DemoMode,
Telemetry: d.Telemetry,
WasmService: d.WasmService,
InstallID: d.Config.InstallID,
NodeID: d.Config.NodeID,
})
if err != nil {
errChan <- errors.Wrap(err, "error during gRPC API setup")
return
}
if err := api.Run(); err != nil {
errChan <- errors.Wrap(err, "error during gRPC API run")
return
}
}()
// Run REST server
go func() {
api, err := httpapi.New(&httpapi.Options{
KVService: d.KVService,
HTTPAPIListenAddress: d.Config.HTTPAPIListenAddress,
Version: d.Config.GetVersion(),
ShutdownContext: d.ShutdownContext,
Health: d.Health,
BusService: d.BusService,
AuthToken: d.Config.AuthToken,
})
if err != nil {
errChan <- errors.Wrap(err, "error during HTTP API setup")
return
}
if err := api.Run(); err != nil {
errChan <- errors.Wrap(err, "error during HTTP API run")
}
}()
// Run Messaging service
go func() {
if err := d.BusService.RunBroadcastConsumer(); err != nil {
errChan <- errors.Wrap(err, "error during RedisBackend consumer run")
}
}()
// Tail/peek consumers are separate from the main consumer to avoid
// bogging down the main consumer with traffic during an active tail
go func() {
if err := d.BusService.RunTailConsumer(); err != nil {
errChan <- errors.Wrap(err, "error during RedisBackend consumer run")
}
}()
displayInfo(d)
go d.RunUptimeTelemetry()
// If shutting down, no need to listen for errCh
select {
case err := <-errChan:
fmt.Println("received an error on errChan in run(): ", err)
return err
case <-d.ShutdownContext.Done():
// Give components a moment to shut down
time.Sleep(5 * time.Second)
logrus.Info("Shutting down...")
return nil
}
}
func displayInfo(d *deps.Dependencies) {
logrus.Infof("version: %s", d.Config.GetVersion())
}