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/*
* 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.DockerInfo
import org.apache.spark.SparkConf
import org.apache.spark.internal.Logging
/**
* A collection of utility functions which can be used by both the
* MesosSchedulerBackend and the CoarseMesosSchedulerBackend.
*/
private[mesos] object MesosSchedulerBackendUtil extends Logging {
/**
* Parse a comma-delimited list of volume specs, each of which
* takes the form [host-dir:]container-dir[:rw|:ro].
*/
def parseVolumesSpec(volumes: String): List[Volume] = {
volumes.split(",").map(_.split(":")).flatMap { spec =>
val vol: Volume.Builder = Volume
.newBuilder()
.setMode(Volume.Mode.RW)
spec match {
case Array(container_path) =>
Some(vol.setContainerPath(container_path))
case Array(container_path, "rw") =>
Some(vol.setContainerPath(container_path))
case Array(container_path, "ro") =>
Some(vol.setContainerPath(container_path)
.setMode(Volume.Mode.RO))
case Array(host_path, container_path) =>
Some(vol.setContainerPath(container_path)
.setHostPath(host_path))
case Array(host_path, container_path, "rw") =>
Some(vol.setContainerPath(container_path)
.setHostPath(host_path))
case Array(host_path, container_path, "ro") =>
Some(vol.setContainerPath(container_path)
.setHostPath(host_path)
.setMode(Volume.Mode.RO))
case spec => {
logWarning(s"Unable to parse volume specs: $volumes. "
+ "Expected form: \"[host-dir:]container-dir[:rw|:ro](, ...)\"")
None
}
}
}
.map { _.build() }
.toList
}
/**
* Parse a comma-delimited list of port mapping specs, each of which
* takes the form host_port:container_port[:udp|:tcp]
*
* Note:
* the docker form is [ip:]host_port:container_port, but the DockerInfo
* message has no field for 'ip', and instead has a 'protocol' field.
* Docker itself only appears to support TCP, so this alternative form
* anticipates the expansion of the docker form to allow for a protocol
* and leaves open the chance for mesos to begin to accept an 'ip' field
*/
def parsePortMappingsSpec(portmaps: String): List[DockerInfo.PortMapping] = {
portmaps.split(",").map(_.split(":")).flatMap { spec: Array[String] =>
val portmap: DockerInfo.PortMapping.Builder = DockerInfo.PortMapping
.newBuilder()
.setProtocol("tcp")
spec match {
case Array(host_port, container_port) =>
Some(portmap.setHostPort(host_port.toInt)
.setContainerPort(container_port.toInt))
case Array(host_port, container_port, protocol) =>
Some(portmap.setHostPort(host_port.toInt)
.setContainerPort(container_port.toInt)
.setProtocol(protocol))
case spec => {
logWarning(s"Unable to parse port mapping specs: $portmaps. "
+ "Expected form: \"host_port:container_port[:udp|:tcp](, ...)\"")
None
}
}
}
.map { _.build() }
.toList
}
/**
* Construct a DockerInfo structure and insert it into a ContainerInfo
*/
def addDockerInfo(
container: ContainerInfo.Builder,
image: String,
volumes: Option[List[Volume]] = None,
network: Option[ContainerInfo.DockerInfo.Network] = None,
portmaps: Option[List[ContainerInfo.DockerInfo.PortMapping]] = None): Unit = {
val docker = ContainerInfo.DockerInfo.newBuilder().setImage(image)
network.foreach(docker.setNetwork)
portmaps.foreach(_.foreach(docker.addPortMappings))
container.setType(ContainerInfo.Type.DOCKER)
container.setDocker(docker.build())
volumes.foreach(_.foreach(container.addVolumes))
}
/**
* Setup a docker containerizer
*/
def setupContainerBuilderDockerInfo(
imageName: String,
conf: SparkConf,
builder: ContainerInfo.Builder): Unit = {
val volumes = conf
.getOption("spark.mesos.executor.docker.volumes")
.map(parseVolumesSpec)
val portmaps = conf
.getOption("spark.mesos.executor.docker.portmaps")
.map(parsePortMappingsSpec)
addDockerInfo(
builder,
imageName,
volumes = volumes,
portmaps = portmaps)
logDebug("setupContainerDockerInfo: using docker image: " + imageName)
}
}
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