Auto-register routes based on kubernetes service annotations

cmd/mc-router/main.go

@@ -1,35 +1,36 @@
 package main
 
 import (
-	"net"
-	"github.com/itzg/mc-router/server"
-	"github.com/alecthomas/kingpin"
-	"strconv"
-	"github.com/sirupsen/logrus"
 	"context"
+	"fmt"
+	"github.com/alecthomas/kingpin"
+	"github.com/itzg/mc-router/server"
+	"github.com/sirupsen/logrus"
+	"net"
 	"os"
 	"os/signal"
-	"fmt"
+	"strconv"
 )
 
 var (
 	port = kingpin.Flag("port", "The port bound to listen for Minecraft client connections").
 		Default("25565").Int()
 	apiBinding = kingpin.Flag("api-binding", "The host:port bound for servicing API requests").
-		String()
+			String()
 	mappings = kingpin.Flag("mapping", "Mapping of external hostname to internal server host:port").
-		StringMap()
+			StringMap()
 	versionFlag = kingpin.Flag("version", "Output version and exit").
-		Bool()
+			Bool()
+	kubeConfigFile = kingpin.Flag("kube-config", "The path to a kubernetes configuration file").String()
 )
 
 var (
 	version = "dev"
-	commit = "none"
-	date = "unknown"
+	commit  = "none"
+	date    = "unknown"
 )
 
-func showVersion()  {
+func showVersion() {
 	fmt.Printf("%v, commit %v, built at %v", version, commit, date)
 }
 
@@ -54,6 +55,13 @@ func main() {
 		server.StartApiServer(*apiBinding)
 	}
 
+	err := server.K8sWatcher.Start(*kubeConfigFile)
+	if err != nil {
+		logrus.WithError(err).Warn("Skipping kubernetes integration")
+	} else {
+		defer server.K8sWatcher.Stop()
+	}
+
 	<-c
 	logrus.Info("Stopping")
 	cancel()