/
serve.go
126 lines (110 loc) · 3.81 KB
/
serve.go
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// Copyright © 2018 Zachary Seguin <zachary@zacharyseguin.ca>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package cmd
import (
"crypto/tls"
"net"
"os"
"os/signal"
"syscall"
"github.com/alerting/alerts/pkg/alerts"
raven "github.com/getsentry/raven-go"
"github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc"
opentracing "github.com/opentracing/opentracing-go"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"google.golang.org/grpc"
)
// serveCmd represents the serve command
var serveCmd = &cobra.Command{
Use: "serve",
Short: "Serve the Alerts microservice",
Long: `Provides the Alerts microservice.`,
Run: func(cmd *cobra.Command, args []string) {
// Initialize Alerts service.
service, err := alerts.NewServer(storage, resourcesClient)
if err != nil {
log.WithError(err).Error("Unable to create server")
raven.CaptureErrorAndWait(err, nil)
return
}
// Setup the gRPC server.
grpcServer := grpc.NewServer(
grpc.UnaryInterceptor(otgrpc.OpenTracingServerInterceptor(opentracing.GlobalTracer())),
grpc.StreamInterceptor(otgrpc.OpenTracingStreamServerInterceptor(opentracing.GlobalTracer())),
grpc.MaxMsgSize(1024*1024*1024),
)
alerts.RegisterAlertsServiceServer(grpcServer, service)
// Setup gRPC security.
var listener net.Listener
cert := cmd.Flag("cert").Value.String()
key := cmd.Flag("key").Value.String()
listen := cmd.Flag("listen").Value.String()
if cert != "" && key != "" {
log.WithFields(log.Fields{
"cert": cert,
"key": key,
}).Info("Configuring TLS")
keypair, err := tls.LoadX509KeyPair(cert, key)
if err != nil {
log.WithError(err).Error("Unable to load TLS keypair")
raven.CaptureErrorAndWait(err, nil)
return
}
listener, err = tls.Listen("tcp", listen, &tls.Config{
Certificates: []tls.Certificate{keypair},
})
if err != nil {
log.WithError(err).Error("Unable to listen")
raven.CaptureErrorAndWait(err, nil)
return
}
} else {
listener, err = net.Listen("tcp", listen)
if err != nil {
log.WithError(err).Error("Unable to listen")
raven.CaptureErrorAndWait(err, nil)
return
}
}
// Listen for signal to stop serving.
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
go func() {
sig := <-sigs
log.WithField("signal", sig).Info("Stopping server")
grpcServer.Stop()
}()
// Initialize the HTTP server.
log.Infof("Listening on %s", listen)
err = grpcServer.Serve(listener)
if err != nil {
log.WithError(err).Error("Error serving gRPC")
raven.CaptureErrorAndWait(err, nil)
return
}
},
}
func init() {
rootCmd.AddCommand(serveCmd)
serveCmd.Flags().String("listen", ":2400", "Address to listen on.")
serveCmd.Flags().String("cert", "", "TLS certificate")
serveCmd.Flags().String("key", "", "TLS key")
}