153 lines
3.7 KiB
Bash
Executable File
153 lines
3.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Runs a Hadoop command as a daemon.
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#
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# Environment Variables
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#
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# HADOOP_CONF_DIR Alternate conf dir. Default is ${HADOOP_HOME}/conf.
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# HADOOP_LOG_DIR Where log files are stored. PWD by default.
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# HADOOP_MASTER host:path where hadoop code should be rsync'd from
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# HADOOP_PID_DIR The pid files are stored. /tmp by default.
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# HADOOP_IDENT_STRING A string representing this instance of hadoop. $USER by default
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# HADOOP_NICENESS The scheduling priority for daemons. Defaults to 0.
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##
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usage="Usage: hadoop-daemon.sh [--config <conf-dir>] [--hosts hostlistfile] [--script script] (start|stop) <hadoop-command> <args...>"
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# if no args specified, show usage
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if [ $# -le 1 ]; then
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echo $usage
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exit 1
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fi
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bin=`dirname "$0"`
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bin=`cd "$bin"; pwd`
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. "$bin"/hadoop-config.sh
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# get arguments
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#default value
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hadoopScript="$HADOOP_HOME"/bin/hadoop
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if [ "--script" = "$1" ]
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then
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shift
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hadoopScript=$1
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shift
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fi
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startStop=$1
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shift
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command=$1
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shift
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hadoop_rotate_log ()
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{
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log=$1;
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num=5;
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if [ -n "$2" ]; then
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num=$2
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fi
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if [ -f "$log" ]; then # rotate logs
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while [ $num -gt 1 ]; do
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prev=`expr $num - 1`
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[ -f "$log.$prev" ] && mv "$log.$prev" "$log.$num"
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num=$prev
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done
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mv "$log" "$log.$num";
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fi
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}
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if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then
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. "${HADOOP_CONF_DIR}/hadoop-env.sh"
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fi
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# get log directory
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if [ "$HADOOP_LOG_DIR" = "" ]; then
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export HADOOP_LOG_DIR="$HADOOP_HOME/logs"
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fi
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mkdir -p "$HADOOP_LOG_DIR"
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if [ "$HADOOP_PID_DIR" = "" ]; then
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HADOOP_PID_DIR=/tmp
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fi
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if [ "$HADOOP_IDENT_STRING" = "" ]; then
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export HADOOP_IDENT_STRING="$USER"
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fi
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# some variables
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export HADOOP_LOGFILE=hadoop-$HADOOP_IDENT_STRING-$command-$HOSTNAME.log
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export HADOOP_ROOT_LOGGER="INFO,DRFA"
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log=$HADOOP_LOG_DIR/hadoop-$HADOOP_IDENT_STRING-$command-$HOSTNAME.out
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pid=$HADOOP_PID_DIR/hadoop-$HADOOP_IDENT_STRING-$command.pid
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# Set default scheduling priority
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if [ "$HADOOP_NICENESS" = "" ]; then
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export HADOOP_NICENESS=0
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fi
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case $startStop in
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(start)
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mkdir -p "$HADOOP_PID_DIR"
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if [ -f $pid ]; then
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if kill -0 `cat $pid` > /dev/null 2>&1; then
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echo $command running as process `cat $pid`. Stop it first.
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exit 1
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fi
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fi
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if [ "$HADOOP_MASTER" != "" ]; then
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echo rsync from $HADOOP_MASTER
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rsync -a -e ssh --delete --exclude=.svn --exclude='logs/*' --exclude='contrib/hod/logs/*' $HADOOP_MASTER/ "$HADOOP_HOME"
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fi
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hadoop_rotate_log $log
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echo starting $command, logging to $log
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cd "$HADOOP_HOME"
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nohup nice -n $HADOOP_NICENESS $hadoopScript --config $HADOOP_CONF_DIR $command "$@" > "$log" 2>&1 < /dev/null &
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echo $! > $pid
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sleep 1; head "$log"
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;;
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(stop)
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if [ -f $pid ]; then
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if kill -0 `cat $pid` > /dev/null 2>&1; then
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echo stopping $command
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kill `cat $pid`
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else
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echo no $command to stop
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fi
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else
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echo no $command to stop
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fi
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;;
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(*)
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echo $usage
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exit 1
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;;
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esac
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