KubernetesDriverBuilder.scala

/*
 * 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
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package org.apache.spark.deploy.k8s.submit

import org.apache.spark.deploy.k8s.{KubernetesConf, KubernetesDriverSpec, KubernetesDriverSpecificConf, KubernetesRoleSpecificConf}
import org.apache.spark.deploy.k8s.features._

private[spark] class KubernetesDriverBuilder(
    provideBasicStep: (KubernetesConf[KubernetesDriverSpecificConf]) => BasicDriverFeatureStep =
      new BasicDriverFeatureStep(_),
    provideCredentialsStep: (KubernetesConf[KubernetesDriverSpecificConf])
      => DriverKubernetesCredentialsFeatureStep =
      new DriverKubernetesCredentialsFeatureStep(_),
    provideServiceStep: (KubernetesConf[KubernetesDriverSpecificConf]) => DriverServiceFeatureStep =
      new DriverServiceFeatureStep(_),
    provideSecretsStep: (KubernetesConf[_ <: KubernetesRoleSpecificConf]
      => MountSecretsFeatureStep) =
      new MountSecretsFeatureStep(_),
    provideEnvSecretsStep: (KubernetesConf[_ <: KubernetesRoleSpecificConf]
      => EnvSecretsFeatureStep) =
    new EnvSecretsFeatureStep(_),
    provideLocalDirsStep: (KubernetesConf[_ <: KubernetesRoleSpecificConf])
      => LocalDirsFeatureStep =
      new LocalDirsFeatureStep(_)) {

  def buildFromFeatures(
    kubernetesConf: KubernetesConf[KubernetesDriverSpecificConf]): KubernetesDriverSpec = {
    val baseFeatures = Seq(
      provideBasicStep(kubernetesConf),
      provideCredentialsStep(kubernetesConf),
      provideServiceStep(kubernetesConf),
      provideLocalDirsStep(kubernetesConf))
    var allFeatures = if (kubernetesConf.roleSecretNamesToMountPaths.nonEmpty) {
      baseFeatures ++ Seq(provideSecretsStep(kubernetesConf))
    } else baseFeatures

    allFeatures = if (kubernetesConf.roleSecretEnvNamesToKeyRefs.nonEmpty) {
      allFeatures ++ Seq(provideEnvSecretsStep(kubernetesConf))
    } else allFeatures

    var spec = KubernetesDriverSpec.initialSpec(kubernetesConf.sparkConf.getAll.toMap)
    for (feature <- allFeatures) {
      val configuredPod = feature.configurePod(spec.pod)
      val addedSystemProperties = feature.getAdditionalPodSystemProperties()
      val addedResources = feature.getAdditionalKubernetesResources()
      spec = KubernetesDriverSpec(
        configuredPod,
        spec.driverKubernetesResources ++ addedResources,
        spec.systemProperties ++ addedSystemProperties)
    }
    spec
  }
}