Add version options for kube-batch

Makefile

@@ -1,8 +1,15 @@
 BIN_DIR=_output/bin
 RELEASE_VER=v0.2
+REPO_PATH=github.com/kubernetes-sigs/kube-batch
+GitSHA=`git rev-parse HEAD`
+Date=`date "+%Y-%m-%d %H:%M:%S"`
 
 kube-batch: init
-	go build -o ${BIN_DIR}/kube-batch ./cmd/kube-batch/
+	go build  -ldflags " \
+	-X '${REPO_PATH}/pkg/version.GitSHA=${GitSHA}' \
+	-X '${REPO_PATH}/pkg/version.Built=${Date}'   \
+	-X '${REPO_PATH}/pkg/version.Version=${RELEASE_VER}'" \
+	-o _output/bin/kube-batch ./cmd/kube-batch
 
 verify: generate-code
 	hack/verify-gofmt.sh

cmd/kube-batch/app/options/options.go

@@ -34,6 +34,7 @@ type ServerOption struct {
 	EnableLeaderElection bool
 	LockObjectNamespace  string
 	DefaultQueue         string
+	PrintVersion         bool
 }
 
 var (
@@ -66,6 +67,7 @@ func (s *ServerOption) AddFlags(fs *pflag.FlagSet) {
 		"executing the main loop. Enable this when running replicated kube-batch for high availability")
 	fs.BoolVar(&s.NamespaceAsQueue, "enable-namespace-as-queue", true, "Make Namespace as Queue with weight one, "+
 		"but kube-batch will not handle Queue CRD anymore")
+	fs.BoolVar(&s.PrintVersion, "version", false, "Show version and quit")
 	fs.StringVar(&s.LockObjectNamespace, "lock-object-namespace", s.LockObjectNamespace, "Define the namespace of the lock object")
 }
 

cmd/kube-batch/app/server.go

@@ -24,6 +24,8 @@ import (
 	"github.com/golang/glog"
 	"github.com/kubernetes-sigs/kube-batch/cmd/kube-batch/app/options"
 	"github.com/kubernetes-sigs/kube-batch/pkg/scheduler"
+	"github.com/kubernetes-sigs/kube-batch/pkg/version"
+
 	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/util/uuid"
 	clientset "k8s.io/client-go/kubernetes"
@@ -42,6 +44,7 @@ const (
 	leaseDuration = 15 * time.Second
 	renewDeadline = 10 * time.Second
 	retryPeriod   = 5 * time.Second
+	apiVersion    = "v1alpha1"
 )
 
 func buildConfig(master, kubeconfig string) (*rest.Config, error) {
@@ -52,6 +55,10 @@ func buildConfig(master, kubeconfig string) (*rest.Config, error) {
 }
 
 func Run(opt *options.ServerOption) error {
+	if opt.PrintVersion {
+		version.PrintVersionAndExit(apiVersion)
+	}
+
 	config, err := buildConfig(opt.Master, opt.Kubeconfig)
 	if err != nil {
 		return err

pkg/version/version.go

@@ -0,0 +1,52 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+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 version
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+)
+
+var (
+	// Version shows the version of kube-batch.
+	Version = "Not provided."
+	// GitSHA shoows the git commit id of kube-batch.
+	GitSHA = "Not provided."
+	// Built shows the built time of the binary.
+	Built = "Not provided."
+)
+
+// PrintVersionAndExit prints versions from the array returned by Info() and exit
+func PrintVersionAndExit(apiVersion string) {
+	for _, i := range Info(apiVersion) {
+		fmt.Printf("%v\n", i)
+	}
+	os.Exit(0)
+}
+
+// Info returns an array of various service versions
+func Info(apiVersion string) []string {
+	return []string{
+		fmt.Sprintf("API Version: %s", apiVersion),
+		fmt.Sprintf("Version: %s", Version),
+		fmt.Sprintf("Git SHA: %s", GitSHA),
+		fmt.Sprintf("Built At: %s", Built),
+		fmt.Sprintf("Go Version: %s", runtime.Version()),
+		fmt.Sprintf("Go OS/Arch: %s/%s", runtime.GOOS, runtime.GOARCH),
+	}
+}