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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.deploy.yarn
import java.util.{List => JList}
import scala.collection.JavaConverters._
import scala.collection.Map
import scala.util.Try
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.yarn.api.records._
import org.apache.hadoop.yarn.client.api.AMRMClient
import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest
import org.apache.hadoop.yarn.conf.YarnConfiguration
import org.apache.hadoop.yarn.webapp.util.WebAppUtils
import org.apache.spark.{SecurityManager, SparkConf}
import org.apache.spark.deploy.yarn.config._
import org.apache.spark.internal.Logging
import org.apache.spark.rpc.RpcEndpointRef
import org.apache.spark.util.Utils
/**
* Handles registering and unregistering the application with the YARN ResourceManager.
*/
private[spark] class YarnRMClient extends Logging {
private var amClient: AMRMClient[ContainerRequest] = _
private var uiHistoryAddress: String = _
private var registered: Boolean = false
/**
* Registers the application master with the RM.
*
* @param conf The Yarn configuration.
* @param sparkConf The Spark configuration.
* @param uiAddress Address of the SparkUI.
* @param uiHistoryAddress Address of the application on the History Server.
*/
def register(
driverUrl: String,
driverRef: RpcEndpointRef,
conf: YarnConfiguration,
sparkConf: SparkConf,
uiAddress: String,
uiHistoryAddress: String,
securityMgr: SecurityManager
): YarnAllocator = {
amClient = AMRMClient.createAMRMClient()
amClient.init(conf)
amClient.start()
this.uiHistoryAddress = uiHistoryAddress
logInfo("Registering the ApplicationMaster")
synchronized {
amClient.registerApplicationMaster(Utils.localHostName(), 0, uiAddress)
registered = true
}
new YarnAllocator(driverUrl, driverRef, conf, sparkConf, amClient, getAttemptId(), securityMgr)
}
/**
* Unregister the AM. Guaranteed to only be called once.
*
* @param status The final status of the AM.
* @param diagnostics Diagnostics message to include in the final status.
*/
def unregister(status: FinalApplicationStatus, diagnostics: String = ""): Unit = synchronized {
if (registered) {
amClient.unregisterApplicationMaster(status, diagnostics, uiHistoryAddress)
}
}
/** Returns the attempt ID. */
def getAttemptId(): ApplicationAttemptId = {
YarnSparkHadoopUtil.get.getContainerId.getApplicationAttemptId()
}
/** Returns the configuration for the AmIpFilter to add to the Spark UI. */
def getAmIpFilterParams(conf: YarnConfiguration, proxyBase: String): Map[String, String] = {
// Figure out which scheme Yarn is using. Note the method seems to have been added after 2.2,
// so not all stable releases have it.
val prefix = Try(classOf[WebAppUtils].getMethod("getHttpSchemePrefix", classOf[Configuration])
.invoke(null, conf).asInstanceOf[String]).getOrElse("http://")
// If running a new enough Yarn, use the HA-aware API for retrieving the RM addresses.
try {
val method = classOf[WebAppUtils].getMethod("getProxyHostsAndPortsForAmFilter",
classOf[Configuration])
val proxies = method.invoke(null, conf).asInstanceOf[JList[String]]
val hosts = proxies.asScala.map { proxy => proxy.split(":")(0) }
val uriBases = proxies.asScala.map { proxy => prefix + proxy + proxyBase }
Map("PROXY_HOSTS" -> hosts.mkString(","), "PROXY_URI_BASES" -> uriBases.mkString(","))
} catch {
case e: NoSuchMethodException =>
val proxy = WebAppUtils.getProxyHostAndPort(conf)
val parts = proxy.split(":")
val uriBase = prefix + proxy + proxyBase
Map("PROXY_HOST" -> parts(0), "PROXY_URI_BASE" -> uriBase)
}
}
/** Returns the maximum number of attempts to register the AM. */
def getMaxRegAttempts(sparkConf: SparkConf, yarnConf: YarnConfiguration): Int = {
val sparkMaxAttempts = sparkConf.get(MAX_APP_ATTEMPTS).map(_.toInt)
val yarnMaxAttempts = yarnConf.getInt(
YarnConfiguration.RM_AM_MAX_ATTEMPTS, YarnConfiguration.DEFAULT_RM_AM_MAX_ATTEMPTS)
val retval: Int = sparkMaxAttempts match {
case Some(x) => if (x <= yarnMaxAttempts) x else yarnMaxAttempts
case None => yarnMaxAttempts
}
retval
}
}
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