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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.master
import scala.annotation.tailrec
import org.apache.spark.SparkConf
import org.apache.spark.util.{IntParam, Utils}
/**
* Command-line parser for the master.
*/
private[master] class MasterArguments(args: Array[String], conf: SparkConf) {
var host = Utils.localHostName()
var port = 7077
var webUiPort = 8080
var propertiesFile: String = null
// Check for settings in environment variables
if (System.getenv("SPARK_MASTER_HOST") != null) {
host = System.getenv("SPARK_MASTER_HOST")
}
if (System.getenv("SPARK_MASTER_PORT") != null) {
port = System.getenv("SPARK_MASTER_PORT").toInt
}
if (System.getenv("SPARK_MASTER_WEBUI_PORT") != null) {
webUiPort = System.getenv("SPARK_MASTER_WEBUI_PORT").toInt
}
parse(args.toList)
// This mutates the SparkConf, so all accesses to it must be made after this line
propertiesFile = Utils.loadDefaultSparkProperties(conf, propertiesFile)
if (conf.contains("spark.master.ui.port")) {
webUiPort = conf.get("spark.master.ui.port").toInt
}
@tailrec
private def parse(args: List[String]): Unit = args match {
case ("--ip" | "-i") :: value :: tail =>
Utils.checkHost(value, "ip no longer supported, please use hostname " + value)
host = value
parse(tail)
case ("--host" | "-h") :: value :: tail =>
Utils.checkHost(value, "Please use hostname " + value)
host = value
parse(tail)
case ("--port" | "-p") :: IntParam(value) :: tail =>
port = value
parse(tail)
case "--webui-port" :: IntParam(value) :: tail =>
webUiPort = value
parse(tail)
case ("--properties-file") :: value :: tail =>
propertiesFile = value
parse(tail)
case ("--help") :: tail =>
printUsageAndExit(0)
case Nil => // No-op
case _ =>
printUsageAndExit(1)
}
/**
* Print usage and exit JVM with the given exit code.
*/
private def printUsageAndExit(exitCode: Int) {
// scalastyle:off println
System.err.println(
"Usage: Master [options]\n" +
"\n" +
"Options:\n" +
" -i HOST, --ip HOST Hostname to listen on (deprecated, please use --host or -h) \n" +
" -h HOST, --host HOST Hostname to listen on\n" +
" -p PORT, --port PORT Port to listen on (default: 7077)\n" +
" --webui-port PORT Port for web UI (default: 8080)\n" +
" --properties-file FILE Path to a custom Spark properties file.\n" +
" Default is conf/spark-defaults.conf.")
// scalastyle:on println
System.exit(exitCode)
}
}
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