Support retrieving the VM UUID on Windows

Signed-off-by: Ben Moss <bmoss@pivotal.io>

pkg/cloudprovider/providers/vsphere/BUILD

@@ -13,6 +13,9 @@ go_library(
         "nodemanager.go",
         "vsphere.go",
         "vsphere_util.go",
+        "vsphere_util_linux.go",
+        "vsphere_util_unsupported.go",
+        "vsphere_util_windows.go",
     ],
     importpath = "k8s.io/kubernetes/pkg/cloudprovider/providers/vsphere",
     deps = [

pkg/cloudprovider/providers/vsphere/vsphere_util.go

@@ -20,7 +20,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -44,8 +43,6 @@ const (
 	Folder                = "Folder"
 	VirtualMachine        = "VirtualMachine"
 	DummyDiskName         = "kube-dummyDisk.vmdk"
-	UUIDPath              = "/sys/class/dmi/id/product_serial"
-	UUIDPrefix            = "VMware-"
 	ProviderPrefix        = "vsphere://"
 	vSphereConfFileEnvVar = "VSPHERE_CONF_FILE"
 )
@@ -534,29 +531,6 @@ func (vs *VSphere) GetNodeNameFromProviderID(providerID string) (string, error)
 	return nodeName, nil
 }
 
-func GetVMUUID() (string, error) {
-	id, err := ioutil.ReadFile(UUIDPath)
-	if err != nil {
-		return "", fmt.Errorf("error retrieving vm uuid: %s", err)
-	}
-	uuidFromFile := string(id[:])
-	//strip leading and trailing white space and new line char
-	uuid := strings.TrimSpace(uuidFromFile)
-	// check the uuid starts with "VMware-"
-	if !strings.HasPrefix(uuid, UUIDPrefix) {
-		return "", fmt.Errorf("Failed to match Prefix, UUID read from the file is %v", uuidFromFile)
-	}
-	// Strip the prefix and white spaces and -
-	uuid = strings.Replace(uuid[len(UUIDPrefix):(len(uuid))], " ", "", -1)
-	uuid = strings.Replace(uuid, "-", "", -1)
-	if len(uuid) != 32 {
-		return "", fmt.Errorf("Length check failed, UUID read from the file is %v", uuidFromFile)
-	}
-	// need to add dashes, e.g. "564d395e-d807-e18a-cb25-b79f65eb2b9f"
-	uuid = fmt.Sprintf("%s-%s-%s-%s-%s", uuid[0:8], uuid[8:12], uuid[12:16], uuid[16:20], uuid[20:32])
-	return uuid, nil
-}
-
 func GetUUIDFromProviderID(providerID string) string {
 	return strings.TrimPrefix(providerID, ProviderPrefix)
 }

pkg/cloudprovider/providers/vsphere/vsphere_util_linux.go

@@ -0,0 +1,53 @@
+// +build linux
+
+/*
+Copyright 2018 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 vsphere
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strings"
+)
+
+const (
+	UUIDPath   = "/sys/class/dmi/id/product_serial"
+	UUIDPrefix = "VMware-"
+)
+
+func GetVMUUID() (string, error) {
+	id, err := ioutil.ReadFile(UUIDPath)
+	if err != nil {
+		return "", fmt.Errorf("error retrieving vm uuid: %s", err)
+	}
+	uuidFromFile := string(id[:])
+	//strip leading and trailing white space and new line char
+	uuid := strings.TrimSpace(uuidFromFile)
+	// check the uuid starts with "VMware-"
+	if !strings.HasPrefix(uuid, UUIDPrefix) {
+		return "", fmt.Errorf("Failed to match Prefix, UUID read from the file is %v", uuidFromFile)
+	}
+	// Strip the prefix and white spaces and -
+	uuid = strings.Replace(uuid[len(UUIDPrefix):(len(uuid))], " ", "", -1)
+	uuid = strings.Replace(uuid, "-", "", -1)
+	if len(uuid) != 32 {
+		return "", fmt.Errorf("Length check failed, UUID read from the file is %v", uuidFromFile)
+	}
+	// need to add dashes, e.g. "564d395e-d807-e18a-cb25-b79f65eb2b9f"
+	uuid = fmt.Sprintf("%s-%s-%s-%s-%s", uuid[0:8], uuid[8:12], uuid[12:16], uuid[16:20], uuid[20:32])
+	return uuid, nil
+}

pkg/cloudprovider/providers/vsphere/vsphere_util_unsupported.go

@@ -0,0 +1,25 @@
+// +build !windows,!linux
+
+/*
+Copyright 2018 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 vsphere
+
+import "fmt"
+
+func GetVMUUID() (string, error) {
+	return "", fmt.Errorf("Retrieving VM UUID on this build is not implemented.")
+}

pkg/cloudprovider/providers/vsphere/vsphere_util_windows.go

@@ -0,0 +1,37 @@
+// +build windows
+
+/*
+Copyright 2018 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 vsphere
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+func GetVMUUID() (string, error) {
+	result, err := exec.Command("wmic", "csproduct", "get", "UUID").Output()
+	if err != nil {
+		return "", fmt.Errorf("error retrieving vm uuid: %s", err)
+	}
+	fields := strings.Fields(string(result))
+	if len(fields) != 2 {
+		return "", fmt.Errorf("received unexpected value retrieving vm uuid: %q", string(result))
+	}
+	return fields[1], nil
+}