*   The Go version was upgraded from go1.8.3 to **go1.9.2** ([#51375](https://github.com/kubernetes/kubernetes/pull/51375),[ @cblecker](https://github.com/cblecker))
    *   The minimum supported go version bumps to 1.9.1. ([#55301](https://github.com/kubernetes/kubernetes/pull/55301),[ @xiangpengzhao](https://github.com/xiangpengzhao))

- Rev the Azure SDK for networking to 2017-06-01 ([#61955](https://github.com/kubernetes/kubernetes/pull/61955))
- Es-image has been upgraded to Elasticsearch 6.3.2 ([#67484](https://github.com/kubernetes/kubernetes/pull/67484))
- metrics-server has been upgraded to v0.3.1. ([#68746](https://github.com/kubernetes/kubernetes/pull/68746))
- GLBC has been updated to v1.2.3 ([#66793](https://github.com/kubernetes/kubernetes/pull/66793))

        to.attribute(ARTIFACT_TYPE, 'gradle-baseline-jars')
    }
}

def currentUpgradedPropertiesFile = layout.buildDirectory.file("gradle-api-info/current-upgraded-properties.json")
def baselineUpgradedPropertiesFile = layout.buildDirectory.file("gradle-api-info/baseline-upgraded-properties.json")
def extractGradleApiInfo = tasks.register("extractGradleApiInfo", gradlebuild.binarycompatibility.ExtractGradleApiInfoTask) {

   * MoreExecutors#listeningDecorator( java.util.concurrent.ExecutorService)}, {@link
   * ListenableFutureTask}, {@link AbstractFuture}, and other utilities over creating plain {@code
   * Future} instances to be upgraded to {@code ListenableFuture} after the fact.
   */
  public static <V extends @Nullable Object> ListenableFuture<V> listenInPoolThread(
      Future<V> future) {
    if (future instanceof ListenableFuture) {

   * MoreExecutors#listeningDecorator( java.util.concurrent.ExecutorService)}, {@link
   * ListenableFutureTask}, {@link AbstractFuture}, and other utilities over creating plain {@code
   * Future} instances to be upgraded to {@code ListenableFuture} after the fact.
   */
  public static <V extends @Nullable Object> ListenableFuture<V> listenInPoolThread(
      Future<V> future) {
    if (future instanceof ListenableFuture) {

* Fix a scalability issue where high rates of event writes degraded etcd performance. ([#64539](https://github.com/kubernetes/kubernetes/pull/64539), [@ccding](https://github.com/ccding))

@CacheableTask
public abstract class ExtractGradleApiInfoTask extends DefaultTask {

    private static final String GRADLE_API_INFO_JAR = "gradle-runtime-api-info";
    private static final String UPGRADED_PROPERTIES_FILE = "upgraded-properties.json";

    public ExtractGradleApiInfoTask() {
        getGradleApiInfoJarPrefix().convention(GRADLE_API_INFO_JAR);
    }

    @Input
    public abstract Property<String> getGradleApiInfoJarPrefix();

                    val v2Jar = v2.tasks.named("jar")
                    val newUpgradedPropertiesFile = layout.buildDirectory.file("gradle-api-info/new-upgraded-properties.json")
                    val oldUpgradedPropertiesFile = layout.buildDirectory.file("gradle-api-info/old-upgraded-properties.json")
                    val extractGradleApiInfo = tasks.register<ExtractGradleApiInfoTask>("extractGradleApiInfo") {

* fix smb mount issue ([#65751](https://github.com/kubernetes/kubernetes/pull/65751), [@andyzhangx](https://github.com/andyzhangx))
* Fix a scalability issue where high rates of event writes degraded etcd performance. ([#64539](https://github.com/kubernetes/kubernetes/pull/64539), [@ccding](https://github.com/ccding))

	// cmd represents the upgradeCheck command
	cmd := &cobra.Command{
		Use:   "precheck",
		Short: "Check whether Istio can safely be installed or upgraded",
		Long:  `precheck inspects a Kubernetes cluster for Istio install and upgrade requirements.`,
		Example: `  # Verify that Istio can be installed or upgraded
  istioctl x precheck

  # Check only a single namespace
  istioctl x precheck --namespace default