Github user mccheah commented on a diff in the pull request:
https://github.com/apache/spark/pull/22897#discussion_r230119092
--- Diff:
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/features/DriverCommandFeatureStep.scala
---
@@ -0,0 +1,137 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.spark.deploy.k8s.features
+
+import scala.collection.JavaConverters._
+
+import io.fabric8.kubernetes.api.model.{ContainerBuilder, EnvVarBuilder}
+
+import org.apache.spark.deploy.k8s._
+import org.apache.spark.deploy.k8s.Config._
+import org.apache.spark.deploy.k8s.Constants._
+import org.apache.spark.deploy.k8s.submit._
+import org.apache.spark.internal.config._
+import org.apache.spark.launcher.SparkLauncher
+import org.apache.spark.util.Utils
+
+/**
+ * Creates the driver command for running the user app, and propagates
needed configuration so
+ * executors can also find the app code.
+ */
+private[spark] class DriverCommandFeatureStep(conf:
KubernetesConf[KubernetesDriverSpecificConf])
+ extends KubernetesFeatureConfigStep {
+
+ private val driverConf = conf.roleSpecificConf
+
+ override def configurePod(pod: SparkPod): SparkPod = {
+ driverConf.mainAppResource match {
+ case Some(JavaMainAppResource(_)) | None =>
+ configureForJava(pod)
+
+ case Some(PythonMainAppResource(res)) =>
+ configureForPython(pod, res)
+
+ case Some(RMainAppResource(res)) =>
+ configureForR(pod, res)
+ }
+ }
+
+ override def getAdditionalPodSystemProperties(): Map[String, String] = {
+ driverConf.mainAppResource match {
+ case Some(JavaMainAppResource(res)) =>
+ additionalJavaProperties(res)
+
+ case Some(PythonMainAppResource(res)) =>
+ additionalPythonProperties(res)
+
+ case Some(RMainAppResource(res)) =>
+ additionalRProperties(res)
+
+ case None =>
+ Map.empty
--- End diff --
Is this for `SparkLauncher.NO_RESOURCE`? Or otherwise should this even be a
valid state? If it isn't then we should throw an exception here. I'm wondering
if we should encode `SparkLauncher.NO_RESOURCE` as its own resource type.
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