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package main
import (
"context"
"os"
"os/signal"
"runtime/debug"
"time"
"github.com/alecthomas/kong"
"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
castorev1pb "code.tvl.fyi/tvix/castore-go"
narBridgeHttp "code.tvl.fyi/tvix/nar-bridge/pkg/http"
storev1pb "code.tvl.fyi/tvix/store-go"
log "github.com/sirupsen/logrus"
)
// `help:"Expose a tvix-store gRPC Interface as HTTP NAR/NARinfo"`
var cli struct {
LogLevel string `enum:"trace,debug,info,warn,error,fatal,panic" help:"The log level to log with" default:"info"`
ListenAddr string `name:"listen-addr" help:"The address this service listens on" type:"string" default:"[::]:9000"` //nolint:lll
EnableAccessLog bool `name:"access-log" help:"Enable access logging" type:"bool" default:"true" negatable:""` //nolint:lll
StoreAddr string `name:"store-addr" help:"The address to the tvix-store RPC interface this will connect to" default:"localhost:8000"` //nolint:lll
EnableOtlp bool `name:"otlp" help:"Enable OpenTelemetry for logs, spans, and metrics" default:"true"` //nolint:lll
}
func main() {
_ = kong.Parse(&cli)
logLevel, err := log.ParseLevel(cli.LogLevel)
if err != nil {
log.Panic("invalid log level")
return
}
log.SetLevel(logLevel)
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
defer stop()
if cli.EnableOtlp {
buildInfo, ok := debug.ReadBuildInfo()
if !ok {
log.Fatal("failed to read build info")
}
shutdown, err := setupOpenTelemetry(ctx, "nar-bridge", buildInfo.Main.Version)
if err != nil {
log.WithError(err).Fatal("failed to setup OpenTelemetry")
}
defer shutdown(context.Background())
}
// connect to tvix-store
log.Debugf("Dialing to %v", cli.StoreAddr)
conn, err := grpc.DialContext(ctx, cli.StoreAddr,
grpc.WithTransportCredentials(insecure.NewCredentials()),
grpc.WithStatsHandler(otelgrpc.NewClientHandler()),
)
if err != nil {
log.Fatalf("did not connect: %v", err)
}
defer conn.Close()
s := narBridgeHttp.New(
castorev1pb.NewDirectoryServiceClient(conn),
castorev1pb.NewBlobServiceClient(conn),
storev1pb.NewPathInfoServiceClient(conn),
cli.EnableAccessLog,
30,
)
log.Printf("Starting nar-bridge-http at %v", cli.ListenAddr)
go s.ListenAndServe(cli.ListenAddr)
// listen for the interrupt signal.
<-ctx.Done()
// Restore default behaviour on the interrupt signal
stop()
log.Info("Received Signal, shutting down, press Ctl+C again to force.")
timeoutCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
if err := s.Shutdown(timeoutCtx); err != nil {
log.WithError(err).Warn("failed to shutdown")
os.Exit(1)
}
}
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