Use an nginx server for remote jars

.gitignore

@@ -1,5 +1,6 @@
 .idea/
 spark/
+spark
 integration-test/target/
 *.class
 *.log

e2e/runner.sh

@@ -90,28 +90,39 @@ git checkout -B $BRANCH origin/$BRANCH
 TAG=$(git rev-parse HEAD | cut -c -6)
 echo "Spark distribution built at SHA $TAG"
 
+FILE_SERVER_IMAGE="$IMAGE_REPO/spark-examples-file-server:$TAG"
+FILE_SERVER_BUILD_DIR="$TEST_ROOT/integration-test/docker-file-server"
+rm -rf $FILE_SERVER_BUILD_DIR/jars
+mkdir -p $FILE_SERVER_BUILD_DIR/jars
+cp $SPARK_REPO_ROOT/dist/examples/jars/spark-examples*.jar $FILE_SERVER_BUILD_DIR/jars/.
 cd $SPARK_REPO_ROOT/dist
 
 if  [[ $DEPLOY_MODE == cloud ]] ;
 then
+  docker build -t $FILE_SERVER_IMAGE "$TEST_ROOT/integration-test/docker-file-server"
   ./sbin/build-push-docker-images.sh -r $IMAGE_REPO -t $TAG build
   if  [[ $IMAGE_REPO == gcr.io* ]] ;
   then
     gcloud docker -- push $IMAGE_REPO/spark-driver:$TAG && \
     gcloud docker -- push $IMAGE_REPO/spark-executor:$TAG && \
     gcloud docker -- push $IMAGE_REPO/spark-init:$TAG
+    gcloud docker -- push $FILE_SERVER_IMAGE
   else
     ./sbin/build-push-docker-images.sh -r $IMAGE_REPO -t $TAG push
+    docker push $FILE_SERVER_IMAGE
   fi
 else
   # -m option for minikube.
+  eval $(minikube docker-env)
+  docker build -t $FILE_SERVER_IMAGE "$TEST_ROOT/integration-test/docker-file-server"
   ./sbin/build-push-docker-images.sh -m -r $IMAGE_REPO -t $TAG build
 fi
 
 cd $TEST_ROOT/integration-test
 $SPARK_REPO_ROOT/build/mvn clean -Ddownload.plugin.skip=true integration-test \
           -Dspark-distro-tgz=$SPARK_REPO_ROOT/*.tgz \
           -DextraScalaTestArgs="-Dspark.kubernetes.test.master=k8s://$MASTER \
+            -Dspark.docker.test.fileServerImage=$FILE_SERVER_IMAGE \
             -Dspark.docker.test.driverImage=$IMAGE_REPO/spark-driver:$TAG \
             -Dspark.docker.test.executorImage=$IMAGE_REPO/spark-executor:$TAG \
             -Dspark.docker.test.initContainerImage=$IMAGE_REPO/spark-init:$TAG" || :

integration-test/docker-file-server/.gitignore

@@ -0,0 +1 @@
+jars

integration-test/docker-file-server/Dockerfile

@@ -0,0 +1,4 @@
+FROM nginx:alpine
+
+COPY jars /opt/spark/jars
+COPY nginx.conf /etc/nginx/nginx.conf

integration-test/docker-file-server/nginx.conf

@@ -0,0 +1,34 @@
+user  nginx;
+worker_processes  1;
+
+error_log  /var/log/nginx/error.log warn;
+pid        /var/run/nginx.pid;
+
+events {
+    worker_connections  1024;
+}
+
+http {
+    server {
+        root /opt/spark/jars;
+        location /ping {
+            return 200 'pong';
+            add_header Content-Type text/plain;
+        }
+    }
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log  /var/log/nginx/access.log  main;
+
+    sendfile        on;
+    #tcp_nopush     on;
+
+    keepalive_timeout  65;
+
+    #gzip  on;
+}

integration-test/pom.xml

@@ -135,7 +135,7 @@
               <executable>/bin/sh</executable>
               <arguments>
                 <argument>-c</argument>
-                <argument>rm -rf spark-distro; mkdir spark-distro-tmp; cd spark-distro-tmp; tar xfz ${spark-distro-tgz}; mv * ../spark-distro; cd ..; rm -rf spark-distro-tmp</argument>
+                <argument>rm -rf spark-distro; mkdir spark-distro-tmp; cd spark-distro-tmp; tar xfz ${spark-distro-tgz}; mv * ../spark-distro; cd ..; rm -rf spark-distro-tmp; rm -rf docker-file-server/jars; mkdir -p docker-file-server/jars; cp spark-distro/examples/jars/spark-examples*.jar docker-file-server/jars/.</argument>
               </arguments>
             </configuration>
           </execution>

integration-test/src/test/scala/org/apache/spark/deploy/k8s/integrationtest/KubernetesSuite.scala

@@ -17,12 +17,12 @@
 package org.apache.spark.deploy.k8s.integrationtest
 
 import java.io.File
+import java.net.URI
 import java.nio.file.Paths
 import java.util.UUID
 import java.util.regex.Pattern
 
 import scala.collection.JavaConverters._
-
 import com.google.common.io.PatternFilenameFilter
 import io.fabric8.kubernetes.api.model.{Container, Pod}
 import org.scalatest.{BeforeAndAfter, BeforeAndAfterAll, FunSuite}
@@ -39,6 +39,7 @@ private[spark] class KubernetesSuite extends FunSuite with BeforeAndAfterAll wit
   private val APP_LOCATOR_LABEL = UUID.randomUUID().toString.replaceAll("-", "")
   private var kubernetesTestComponents: KubernetesTestComponents = _
   private var sparkAppConf: SparkAppConf = _
+  private var remoteExamplesJarUri: URI = _
 
   private val driverImage = System.getProperty(
     "spark.docker.test.driverImage",
@@ -50,7 +51,6 @@ private[spark] class KubernetesSuite extends FunSuite with BeforeAndAfterAll wit
     "spark.docker.test.initContainerImage",
     "spark-init:latest")
 
-
   override def beforeAll(): Unit = {
     testBackend.initialize()
     kubernetesTestComponents = new KubernetesTestComponents(testBackend.getKubernetesClient)
@@ -67,6 +67,8 @@ private[spark] class KubernetesSuite extends FunSuite with BeforeAndAfterAll wit
       .set("spark.kubernetes.driver.label.spark-app-locator", APP_LOCATOR_LABEL)
       .set("spark.kubernetes.executor.label.spark-app-locator", APP_LOCATOR_LABEL)
     kubernetesTestComponents.createNamespace()
+    remoteExamplesJarUri = SparkExamplesFileServerRunner
+      .launchServerAndGetUriForExamplesJar(kubernetesTestComponents)
   }
 
   after {
@@ -97,6 +99,11 @@ private[spark] class KubernetesSuite extends FunSuite with BeforeAndAfterAll wit
     runSparkPiAndVerifyCompletion(appArgs = Array("5"))
   }
 
+  test("Run SparkPi using the remote example jar.") {
+    sparkAppConf.set("spark.kubernetes.initContainer.image", initContainerImage)
+    runSparkPiAndVerifyCompletion(appResource = remoteExamplesJarUri.toString)
+  }
+
   test("Run SparkPi with custom driver pod name, labels, annotations, and environment variables.") {
     sparkAppConf
       .set("spark.kubernetes.driver.pod.name", "spark-integration-spark-pi")
@@ -163,8 +170,8 @@ private[spark] class KubernetesSuite extends FunSuite with BeforeAndAfterAll wit
 
     createTestSecret()
 
-    runSparkPageRankAndVerifyCompletion(
-      appArgs = Array(CONTAINER_LOCAL_DOWNLOADED_PAGE_RANK_DATA_FILE),
+    runSparkPiAndVerifyCompletion(
+      appResource = remoteExamplesJarUri.toString,
       driverPodChecker = (driverPod: Pod) => {
         doBasicDriverPodCheck(driverPod)
         checkTestSecret(driverPod, withInitContainer = true)
@@ -188,7 +195,6 @@ private[spark] class KubernetesSuite extends FunSuite with BeforeAndAfterAll wit
       driverPodChecker,
       executorPodChecker)
   }
-
   private def runSparkPageRankAndVerifyCompletion(
       appResource: String = CONTAINER_LOCAL_SPARK_DISTRO_EXAMPLES_JAR,
       driverPodChecker: Pod => Unit = doBasicDriverPodCheck,

integration-test/src/test/scala/org/apache/spark/deploy/k8s/integrationtest/docker/SparkDockerImageBuilder.scala

@@ -43,6 +43,8 @@ private[spark] class SparkDockerImageBuilder
   private val dockerHost = dockerEnv.getOrElse("DOCKER_HOST",
       throw new IllegalStateException("DOCKER_HOST env not found."))
 
+  private val FILE_SERVER_BUILD_PATH = Paths.get("docker-file-server")
+
   private val originalDockerUri = URI.create(dockerHost)
   private val httpsDockerUri = new URIBuilder()
     .setHost(originalDockerUri.getHost)
@@ -68,6 +70,10 @@ private[spark] class SparkDockerImageBuilder
     buildImage("spark-driver", DRIVER_DOCKER_FILE)
     buildImage("spark-executor", EXECUTOR_DOCKER_FILE)
     buildImage("spark-init", INIT_CONTAINER_DOCKER_FILE)
+    dockerClient.build(
+      FILE_SERVER_BUILD_PATH,
+      "spark-examples-file-server",
+      new LoggingBuildHandler())
   }
 
   private def buildImage(