Support specify CPU cores and Memory restricts for driver (#340)

Signed-off-by: duyanghao <[email protected]>

Author: duyanghao

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

@@ -19,7 +19,7 @@ package org.apache.spark.deploy.kubernetes.submit
 import java.io.File
 import java.util.Collections
 
-import io.fabric8.kubernetes.api.model.{ContainerBuilder, EnvVarBuilder, OwnerReferenceBuilder, PodBuilder}
+import io.fabric8.kubernetes.api.model.{ContainerBuilder, EnvVarBuilder, OwnerReferenceBuilder, PodBuilder, QuantityBuilder}
 import io.fabric8.kubernetes.client.KubernetesClient
 import scala.collection.JavaConverters._
 
@@ -61,6 +61,11 @@ private[spark] class Client(
     .getOrElse(kubernetesAppId)
   private val driverDockerImage = sparkConf.get(DRIVER_DOCKER_IMAGE)
   private val dockerImagePullPolicy = sparkConf.get(DOCKER_IMAGE_PULL_POLICY)
+
+  // CPU settings
+  private val driverCpuCores = sparkConf.getOption("spark.driver.cores").getOrElse("1")
+
+  // Memory settings
   private val driverMemoryMb = sparkConf.get(org.apache.spark.internal.config.DRIVER_MEMORY)
   private val memoryOverheadMb = sparkConf
     .get(KUBERNETES_DRIVER_MEMORY_OVERHEAD)
@@ -97,6 +102,15 @@ private[spark] class Client(
         .withValue(classPath)
         .build()
     }
+    val driverCpuQuantity = new QuantityBuilder(false)
+      .withAmount(driverCpuCores)
+      .build()
+    val driverMemoryQuantity = new QuantityBuilder(false)
+      .withAmount(s"${driverMemoryMb}M")
+      .build()
+    val driverMemoryLimitQuantity = new QuantityBuilder(false)
+      .withAmount(s"${driverContainerMemoryWithOverhead}M")
+      .build()
     val driverContainer = new ContainerBuilder()
       .withName(DRIVER_CONTAINER_NAME)
       .withImage(driverDockerImage)
@@ -114,6 +128,12 @@ private[spark] class Client(
         .withName(ENV_DRIVER_ARGS)
         .withValue(appArgs.mkString(" "))
         .endEnv()
+      .withNewResources()
+        .addToRequests("cpu", driverCpuQuantity)
+        .addToLimits("cpu", driverCpuQuantity)
+        .addToRequests("memory", driverMemoryQuantity)
+        .addToLimits("memory", driverMemoryLimitQuantity)
+        .endResources()
       .build()
     val basePod = new PodBuilder()
       .withNewMetadata()