Github user liyinan926 commented on a diff in the pull request:
https://github.com/apache/spark/pull/19468#discussion_r150623890
--- Diff:
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/SparkKubernetesClientFactory.scala
---
@@ -0,0 +1,103 @@
+/*
+ * 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
+
+import java.io.File
+
+import com.google.common.base.Charsets
+import com.google.common.io.Files
+import io.fabric8.kubernetes.client.{Config, ConfigBuilder,
DefaultKubernetesClient, KubernetesClient}
+import io.fabric8.kubernetes.client.utils.HttpClientUtils
+import okhttp3.Dispatcher
+
+import org.apache.spark.SparkConf
+import org.apache.spark.deploy.k8s.config._
+import org.apache.spark.util.ThreadUtils
+
+/**
+ * Spark-opinionated builder for Kubernetes clients. It uses a prefix plus
common suffixes to
+ * parse configuration keys, similar to the manner in which Spark's
SecurityManager parses SSL
+ * options for different components.
+ */
+private[spark] object SparkKubernetesClientFactory {
+
+ def createKubernetesClient(
+ master: String,
+ namespace: Option[String],
+ kubernetesAuthConfPrefix: String,
+ sparkConf: SparkConf,
+ maybeServiceAccountToken: Option[File],
+ maybeServiceAccountCaCert: Option[File]): KubernetesClient = {
+ val oauthTokenFileConf =
s"$kubernetesAuthConfPrefix.$OAUTH_TOKEN_FILE_CONF_SUFFIX"
+ val oauthTokenConf =
s"$kubernetesAuthConfPrefix.$OAUTH_TOKEN_CONF_SUFFIX"
+ val oauthTokenFile = sparkConf.getOption(oauthTokenFileConf)
+ .map(new File(_))
+ .orElse(maybeServiceAccountToken)
+ val oauthTokenValue = sparkConf.getOption(oauthTokenConf)
+ ConfigurationUtils.requireNandDefined(
+ oauthTokenFile,
+ oauthTokenValue,
+ s"Cannot specify OAuth token through both a file $oauthTokenFileConf
and a" +
+ s" value $oauthTokenConf.")
--- End diff --
Done.
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