Github user mccheah commented on a diff in the pull request:
https://github.com/apache/spark/pull/21092#discussion_r186244541
--- Diff:
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/features/bindings/PythonDriverFeatureStep.scala
---
@@ -0,0 +1,59 @@
+/*
+ * 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.bindings
+
+import io.fabric8.kubernetes.api.model.ContainerBuilder
+import io.fabric8.kubernetes.api.model.HasMetadata
+
+import org.apache.spark.deploy.k8s.{KubernetesConf,
KubernetesRoleSpecificConf, SparkPod}
+import org.apache.spark.deploy.k8s.Constants._
+import org.apache.spark.deploy.k8s.KubernetesUtils
+import org.apache.spark.deploy.k8s.features.KubernetesFeatureConfigStep
+
+private[spark] class PythonDriverFeatureStep(
+ kubernetesConf: KubernetesConf[_ <: KubernetesRoleSpecificConf])
+ extends KubernetesFeatureConfigStep {
+ override def configurePod(pod: SparkPod): SparkPod = {
+ val mainResource = kubernetesConf.pySparkMainResource()
+ require(mainResource.isDefined, "PySpark Main Resource must be
defined")
+ val otherPyFiles = kubernetesConf.pyFiles().map(pyFile =>
+ KubernetesUtils.resolveFileUrisAndPath(pyFile.split(","))
+ .mkString(":")).getOrElse("")
+ val withPythonPrimaryFileContainer = new
ContainerBuilder(pod.container)
+ .addNewEnv()
+ .withName(ENV_PYSPARK_ARGS)
+ .withValue(kubernetesConf.pySparkAppArgs().getOrElse(""))
+ .endEnv()
+ .addNewEnv()
+ .withName(ENV_PYSPARK_PRIMARY)
+ .withValue(KubernetesUtils.resolveFileUri(mainResource.get))
+ .endEnv()
+ .addNewEnv()
+ .withName(ENV_PYSPARK_FILES)
+ .withValue(if (otherPyFiles == "") {""} else otherPyFiles)
--- End diff --
Don't add empty env vars - see above.
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