Add hyperkit version

Makefile

@@ -86,6 +86,9 @@ SOURCE_PACKAGES = ./cmd/... ./pkg/... ./test/...
 # kvm2 ldflags
 KVM2_LDFLAGS := -X k8s.io/minikube/pkg/drivers/kvm.version=$(VERSION) -X k8s.io/minikube/pkg/drivers/kvm.gitCommitID=$(COMMIT) 
 
+# hyperkit ldflags
+HYPERKIT_LDFLAGS := -X k8s.io/minikube/pkg/drivers/hyperkit.version=$(VERSION) -X k8s.io/minikube/pkg/drivers/hyperkit.gitCommitID=$(COMMIT)
+
 # $(call DOCKER, image, command)
 define DOCKER
 	docker run --rm -e GOCACHE=/app/.cache -e IN_DOCKER=1 --user $(shell id -u):$(shell id -g) -w /app -v $(PWD):/app -v $(GOPATH):/go --entrypoint /bin/bash $(1) -c '$(2)'
@@ -329,7 +332,9 @@ out/docker-machine-driver-hyperkit:
 ifeq ($(MINIKUBE_BUILD_IN_DOCKER),y)
 	$(call DOCKER,$(HYPERKIT_BUILD_IMAGE),CC=o64-clang CXX=o64-clang++ /usr/bin/make $@)
 else
-	GOOS=darwin CGO_ENABLED=1 go build -o $(BUILD_DIR)/docker-machine-driver-hyperkit k8s.io/minikube/cmd/drivers/hyperkit
+	GOOS=darwin CGO_ENABLED=1 go build \
+		-ldflags="$(HYPERKIT_LDFLAGS)"   \
+		-o $(BUILD_DIR)/docker-machine-driver-hyperkit k8s.io/minikube/cmd/drivers/hyperkit
 endif
 
 .PHONY: install-hyperkit-driver

cmd/drivers/hyperkit/main.go

@@ -19,10 +19,19 @@ limitations under the License.
 package main
 
 import (
+	"fmt"
+	"os"
+
 	"github.com/docker/machine/libmachine/drivers/plugin"
 	"k8s.io/minikube/pkg/drivers/hyperkit"
 )
 
 func main() {
+	if len(os.Args) > 1 && os.Args[1] == "version" {
+		fmt.Println("version:", hyperkit.GetVersion())
+		fmt.Println("commit:", hyperkit.GetGitCommitID())
+		return
+	}
+
 	plugin.RegisterDriver(hyperkit.NewDriver("", ""))
 }

docs/drivers.md

@@ -133,6 +133,14 @@ or, to use hyperkit as a default driver for minikube:
 minikube config set vm-driver hyperkit
 ```
 
+### Troubleshoot
+
+Make sure you are running the lastest version of your driver.
+
+```shell
+docker-machine-driver-hyperkit version
+```
+
 ## HyperV driver
 
 Hyper-v users may need to create a new external network switch as described [here](https://docs.docker.com/machine/drivers/hyper-v/). This step may prevent a problem in which `minikube start` hangs indefinitely, unable to ssh into the minikube virtual machine. In this add, add the `--hyperv-virtual-switch=switch-name` argument to the `minikube start` command.

pkg/drivers/hyperkit/version.go

@@ -0,0 +1,35 @@
+/*
+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 hyperkit
+
+// The current version of the docker-machine-driver-hyperkit
+
+// version is a private field and should be set when compiling with --ldflags="-X k8s.io/minikube/pkg/drivers/hyperkit.version=vX.Y.Z"
+var version = "v0.0.0-unset"
+
+// gitCommitID is a private field and should be set when compiling with --ldflags="-X k8s.io/minikube/pkg/drivers/hyperkit.gitCommitID=<commit-id>"
+var gitCommitID = ""
+
+// GetVersion returns the current docker-machine-driver-hyperkit version
+func GetVersion() string {
+	return version
+}
+
+// GetGitCommitID returns the git commit id from which it is being built
+func GetGitCommitID() string {
+	return gitCommitID
+}