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package spark.deploy.master
import spark.util.IntParam
import spark.Utils
/**
* Command-line parser for the master.
*/
private[spark] class MasterArguments(args: Array[String]) {
var host = Utils.localHostName()
var port = 7077
var webUiPort = 8080
// 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)
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 ("--help" | "-h") :: tail =>
printUsageAndExit(0)
case Nil => {}
case _ =>
printUsageAndExit(1)
}
/**
* Print usage and exit JVM with the given exit code.
*/
def printUsageAndExit(exitCode: Int) {
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)")
System.exit(exitCode)
}
}
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