[SPARK-25828][K8S] Bumping Kubernetes-Client version to 4.1.0

dev/deps/spark-deps-hadoop-2.7

@@ -132,13 +132,13 @@ jta-1.1.jar
 jtransforms-2.4.0.jar
 jul-to-slf4j-1.7.16.jar
 kryo-shaded-4.0.2.jar
-kubernetes-client-3.0.0.jar
-kubernetes-model-2.0.0.jar
+kubernetes-client-4.1.0.jar
+kubernetes-model-4.1.0.jar
 leveldbjni-all-1.8.jar
 libfb303-0.9.3.jar
 libthrift-0.9.3.jar
 log4j-1.2.17.jar
-logging-interceptor-3.8.1.jar
+logging-interceptor-3.9.1.jar
 lz4-java-1.5.0.jar
 machinist_2.11-0.6.1.jar
 macro-compat_2.11-1.1.1.jar

dev/deps/spark-deps-hadoop-3.1

@@ -147,13 +147,13 @@ kerby-pkix-1.0.1.jar
 kerby-util-1.0.1.jar
 kerby-xdr-1.0.1.jar
 kryo-shaded-4.0.2.jar
-kubernetes-client-3.0.0.jar
-kubernetes-model-2.0.0.jar
+kubernetes-client-4.1.0.jar
+kubernetes-model-4.1.0.jar
 leveldbjni-all-1.8.jar
 libfb303-0.9.3.jar
 libthrift-0.9.3.jar
 log4j-1.2.17.jar
-logging-interceptor-3.8.1.jar
+logging-interceptor-3.9.1.jar
 lz4-java-1.5.0.jar
 machinist_2.11-0.6.1.jar
 macro-compat_2.11-1.1.1.jar

docs/running-on-kubernetes.md

@@ -45,7 +45,8 @@ logs and remains in "completed" state in the Kubernetes API until it's eventuall
 
 Note that in the completed state, the driver pod does *not* use any computational or memory resources.
 
-The driver and executor pod scheduling is handled by Kubernetes. It is possible to schedule the
+The driver and executor pod scheduling is handled by Kubernetes. Communication to the Kubernetes API is done via fabric8, and we are 
+currently running <code>kubernetes-client</code> version <code>4.1.0</code>. Make sure that when you are making infrastructure additions that you are aware of said version. It is possible to schedule the
 driver and executor pods on a subset of available nodes through a [node selector](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector)
 using the configuration property for it. It will be possible to use more advanced
 scheduling hints like [node/pod affinities](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity) in a future release.

resource-managers/kubernetes/core/pom.xml

@@ -29,7 +29,7 @@
   <name>Spark Project Kubernetes</name>
   <properties>
     <sbt.project.name>kubernetes</sbt.project.name>
-    <kubernetes.client.version>3.0.0</kubernetes.client.version>
+    <kubernetes.client.version>4.1.0</kubernetes.client.version>
   </properties>
 
   <dependencies>

resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/KubernetesUtils.scala

@@ -18,7 +18,7 @@ package org.apache.spark.deploy.k8s
 
 import scala.collection.JavaConverters._
 
-import io.fabric8.kubernetes.api.model.{ContainerStateRunning, ContainerStateTerminated, ContainerStateWaiting, ContainerStatus, Pod, Time}
+import io.fabric8.kubernetes.api.model.{ContainerStateRunning, ContainerStateTerminated, ContainerStateWaiting, ContainerStatus, Pod}
 
 import org.apache.spark.{SparkConf, SparkException}
 import org.apache.spark.util.Utils
@@ -157,7 +157,7 @@ private[spark] object KubernetesUtils {
       }.getOrElse(Seq(("container state", "N/A")))
   }
 
-  def formatTime(time: Time): String = {
-    if (time != null) time.getTime else "N/A"
+  def formatTime(time: String): String = {
+    if (time != null) time else "N/A"
   }
 }

resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/features/MountVolumesFeatureStep.scala

@@ -56,8 +56,9 @@ private[spark] class MountVolumesFeatureStep(
 
       val volumeBuilder = spec.volumeConf match {
         case KubernetesHostPathVolumeConf(hostPath) =>
+          /* "" means that no checks will be performed before mounting the hostPath volume */
           new VolumeBuilder()
-            .withHostPath(new HostPathVolumeSource(hostPath))
+            .withHostPath(new HostPathVolumeSource(hostPath, ""))
 
         case KubernetesPVCVolumeConf(claimName) =>
           new VolumeBuilder()

resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/LoggingPodStatusWatcher.scala

@@ -20,7 +20,7 @@ import java.util.concurrent.{CountDownLatch, TimeUnit}
 
 import scala.collection.JavaConverters._
 
-import io.fabric8.kubernetes.api.model.{ContainerStateRunning, ContainerStateTerminated, ContainerStateWaiting, ContainerStatus, Pod, Time}
+import io.fabric8.kubernetes.api.model.Pod
 import io.fabric8.kubernetes.client.{KubernetesClientException, Watcher}
 import io.fabric8.kubernetes.client.Watcher.Action
 

resource-managers/kubernetes/core/src/test/scala/org/apache/spark/scheduler/cluster/k8s/ExecutorLifecycleTestUtils.scala

@@ -82,7 +82,7 @@ object ExecutorLifecycleTestUtils {
   def deletedExecutor(executorId: Long): Pod = {
     new PodBuilder(podWithAttachedContainerForId(executorId))
       .editOrNewMetadata()
-        .withNewDeletionTimestamp("523012521")
+        .withDeletionTimestamp("523012521")
         .endMetadata()
       .build()
   }

resource-managers/kubernetes/integration-tests/pom.xml

@@ -29,7 +29,7 @@
     <download-maven-plugin.version>1.3.0</download-maven-plugin.version>
     <exec-maven-plugin.version>1.4.0</exec-maven-plugin.version>
     <extraScalaTestArgs></extraScalaTestArgs>
-    <kubernetes-client.version>3.0.0</kubernetes-client.version>
+    <kubernetes-client.version>4.1.0</kubernetes-client.version>
     <scala-maven-plugin.version>3.2.2</scala-maven-plugin.version>
     <scalatest-maven-plugin.version>1.0</scalatest-maven-plugin.version>
     <sbt.project.name>kubernetes-integration-tests</sbt.project.name>