Add --version flag.

cmd/node_problem_detector.go

@@ -0,0 +1,56 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 (
+	"flag"
+	"net/url"
+	"os"
+
+	"k8s.io/node-problem-detector/pkg/kernelmonitor"
+	"k8s.io/node-problem-detector/pkg/problemdetector"
+	"k8s.io/node-problem-detector/pkg/version"
+
+	"github.com/golang/glog"
+)
+
+// TODO: Move flags to options directory.
+var (
+	kernelMonitorConfigPath = flag.String("kernel-monitor", "/config/kernel-monitor.json", "The path to the kernel monitor config file")
+	apiServerOverride       = flag.String("apiserver-override", "", "Custom URI used to connect to Kubernetes ApiServer")
+	printVersion            = flag.Bool("version", false, "Print version information and quit")
+)
+
+func validateCmdParams() {
+	if _, err := url.Parse(*apiServerOverride); err != nil {
+		glog.Fatalf("apiserver-override %q is not a valid HTTP URI: %v", *apiServerOverride, err)
+	}
+}
+
+func main() {
+	flag.Parse()
+	validateCmdParams()
+
+	if *printVersion {
+		version.PrintVersion()
+		os.Exit(0)
+	}
+
+	k := kernelmonitor.NewKernelMonitorOrDie(*kernelMonitorConfigPath)
+	p := problemdetector.NewProblemDetector(k, *apiServerOverride)
+	p.Run()
+}