vanzin commented on a change in pull request #22904: [SPARK-25887][K8S] 
Configurable K8S context support
URL: https://github.com/apache/spark/pull/22904#discussion_r240308164
 
 

 ##########
 File path: 
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/SparkKubernetesClientFactory.scala
 ##########
 @@ -67,8 +66,16 @@ private[spark] object SparkKubernetesClientFactory {
     val dispatcher = new Dispatcher(
       ThreadUtils.newDaemonCachedThreadPool("kubernetes-dispatcher"))
 
-    // TODO [SPARK-25887] Create builder in a way that respects configurable 
context
-    val config = new ConfigBuilder()
+    // Allow for specifying a context used to auto-configure from the users 
K8S config file
+    val kubeContext = sparkConf.get(KUBERNETES_CONTEXT).filter(c => 
StringUtils.isNotBlank(c))
+    logInfo(s"Auto-configuring K8S client using " +
+      s"${if (kubeContext.isEmpty) s"context ${kubeContext.get}" else "current 
context"}" +
+      s" from users K8S config file")
+
+    // Start from an auto-configured config with the desired context
+    // Fabric 8 uses null to indicate that the users current context should be 
used so if no
+    // explicit setting pass null
+    val config = new ConfigBuilder(autoConfigure(kubeContext.getOrElse(null)))
 
 Review comment:
   > What does client mode mean to you?
   
   Client mode means that the driver is not started by Spark. It's started 
directly by the user.
   
   > Also - how should one interpret this paragraph in the docs?
   
   I have no idea.

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