Github user hellertime commented on a diff in the pull request:
https://github.com/apache/spark/pull/3074#discussion_r19832776
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackendUtil.scala
---
@@ -0,0 +1,60 @@
+/*
+ * 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.scheduler.cluster.mesos
+
+import org.apache.mesos.Protos.{ContainerInfo, Volume}
+import org.apache.mesos.Protos.ContainerInfo.Builder
+
+/**
+ * A collection of utility functions which can be used by both the
+ * MesosSchedulerBackend and the CoarseMesosSchedulerBackend.
+ */
+private[spark] object MesosSchedulerBackendUtil {
+ def withDockerInfo(container: ContainerInfo.Builder, image: String,
volumes: Option[String]) = {
+ container.setType(ContainerInfo.Type.DOCKER)
+
container.setDocker(ContainerInfo.DockerInfo.newBuilder().setImage(image).build())
+
+ def mkVol(p: String, m:Volume.Mode) {
+ container.addVolumesBuilder().setContainerPath(p).setMode(m)
+ }
+
+ def mkMnt(s: String, d: String, m: Volume.Mode) {
+
container.addVolumesBuilder().setContainerPath(d).setHostPath(s).setMode(m)
+ }
+
+ volumes.map {
+ _.split(",").map(_.split(":")).map {
+ _ match {
+ case Array(container_path) =>
+ mkVol(container_path, Volume.Mode.RW)
+ case Array(container_path, "rw") =>
+ mkVol(container_path, Volume.Mode.RW)
+ case Array(container_path, "ro") =>
+ mkVol(container_path, Volume.Mode.RO)
+ case Array(host_path, container_path) =>
+ mkMnt(host_path, container_path, Volume.Mode.RW)
+ case Array(host_path, container_path, "rw") =>
+ mkMnt(host_path, container_path, Volume.Mode.RW)
+ case Array(host_path, container_path, "ro") =>
+ mkMnt(host_path, container_path, Volume.Mode.RO)
+ case _ => ()
--- End diff --
Would logging a message be sufficient? I think if I extend the utility
object with `Logging` I can emit a `logInfo` call here
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