| #! /bin/sh |
| # |
| # 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. |
| |
| # skeleton example file to build /etc/init.d/ scripts. |
| # This file should be used to construct scripts for /etc/init.d. |
| # |
| # Written by Miquel van Smoorenburg <miquels@cistron.nl>. |
| # Modified for Debian |
| # by Ian Murdock <imurdock@gnu.ai.mit.edu>. |
| # Further changes by Javier Fernandez-Sanguino <jfs@debian.org> |
| # |
| # Version: @(#)skeleton 1.9 26-Feb-2001 miquels@cistron.nl |
| # |
| # Starts a Hadoop @HADOOP_DAEMON@ |
| # |
| # chkconfig: 2345 85 15 |
| # description: Hadoop @HADOOP_DAEMON@ |
| # |
| ### BEGIN INIT INFO |
| # Provides: hadoop-@HADOOP_DAEMON@ |
| # Required-Start: $network $local_fs |
| # Required-Stop: |
| # Should-Start: $named |
| # Should-Stop: |
| # Default-Start: 2 3 4 5 |
| # Default-Stop: 0 1 6 |
| # Short-Description: Hadoop @HADOOP_DAEMON@ daemon |
| ### END INIT INFO |
| |
| # Support ephemeral /var/run. We need to create this directory before |
| # hadoop-config.sh is sourced below since it sets HADOOP_PID_DIR if |
| # this directory exists. |
| install -d -m 0775 -o root -g hadoop /var/run/hadoop |
| |
| . /etc/default/hadoop |
| |
| # Autodetect JAVA_HOME if not defined |
| if [ -e /usr/libexec/bigtop-detect-javahome ]; then |
| . /usr/libexec/bigtop-detect-javahome |
| elif [ -e /usr/lib/bigtop-utils/bigtop-detect-javahome ]; then |
| . /usr/lib/bigtop-utils/bigtop-detect-javahome |
| fi |
| |
| . $HADOOP_HOME/bin/hadoop-config.sh |
| |
| # FIXME: this needs to be removed once hadoop-config.sh stop clobbering HADOOP_HOME |
| . /etc/default/hadoop |
| |
| |
| PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin |
| DAEMON_SCRIPT=$HADOOP_HOME/bin/hadoop-daemon.sh |
| NAME=hadoop-@HADOOP_DAEMON@ |
| DESC="Hadoop @HADOOP_DAEMON@ daemon" |
| PID_FILE=$HADOOP_PID_DIR/hadoop-$HADOOP_IDENT_STRING-@HADOOP_DAEMON@.pid |
| SLEEP_TIME=5 |
| |
| test -x $DAEMON_SCRIPT || exit 1 |
| |
| |
| DODTIME=3 # Time to wait for the server to die, in seconds |
| # If this value is set too low you might not |
| # let some servers to die gracefully and |
| # 'restart' will not work |
| |
| # Checks if the given pid represents a live process. |
| # Returns 0 if the pid is a live process, 1 otherwise |
| hadoop_is_process_alive() { |
| local pid="$1" |
| ps -fp $pid | grep $pid | grep @HADOOP_DAEMON@ > /dev/null 2>&1 |
| } |
| |
| # Check if the process associated to a pidfile is running. |
| # Return 0 if the pidfile exists and the process is running, 1 otherwise |
| hadoop_check_pidfile() { |
| local pidfile="$1" # IN |
| local pid |
| |
| pid=`cat "$pidfile" 2>/dev/null` |
| if [ "$pid" = '' ]; then |
| # The file probably does not exist or is empty. |
| return 1 |
| fi |
| |
| set -- $pid |
| pid="$1" |
| |
| hadoop_is_process_alive $pid |
| } |
| |
| hadoop_process_kill() { |
| local pid="$1" # IN |
| local signal="$2" # IN |
| local second |
| |
| kill -$signal $pid 2>/dev/null |
| |
| # Wait a bit to see if the dirty job has really been done |
| for second in 0 1 2 3 4 5 6 7 8 9 10; do |
| if hadoop_is_process_alive "$pid"; then |
| # Success |
| return 0 |
| fi |
| |
| sleep 1 |
| done |
| |
| # Timeout |
| return 1 |
| } |
| |
| # Kill the process associated to a pidfile |
| hadoop_stop_pidfile() { |
| local pidfile="$1" # IN |
| local pid |
| |
| pid=`cat "$pidfile" 2>/dev/null` |
| if [ "$pid" = '' ]; then |
| # The file probably does not exist or is empty. Success |
| return 0 |
| fi |
| |
| set -- $pid |
| pid="$1" |
| |
| # First try the easy way |
| if hadoop_process_kill "$pid" 15; then |
| return 0 |
| fi |
| |
| # Otherwise try the hard way |
| if hadoop_process_kill "$pid" 9; then |
| return 0 |
| fi |
| |
| return 1 |
| } |
| |
| start() { |
| TARGET_USER_NAME="HADOOP_`echo @HADOOP_DAEMON@ | tr a-z A-Z`_USER" |
| TARGET_USER=$(eval "echo \$$TARGET_USER_NAME") |
| |
| if [ "@HADOOP_DAEMON@" = "datanode" ]; then |
| # The following needs to be removed once HDFS-1943 gets finally put to rest. |
| # The logic of this ugly hack is this: IFF we do NOT have jsvc installed it is |
| # guaranteed that we can NOT be running in a secure mode and thus we need to |
| # workaround HDFS-1943 (start as non-root). As soon as jsvc gets installed |
| # we are assuming a secure installation and starting a data node as root. |
| # This leaves 2 corner cases: |
| # 1. HADOOP_DATANODE_USER being set to root |
| # 2. jsvc is installed but Hadoop is configures to run in an unsecure mode |
| # Both will currently fail |
| if [ -f $HADOOP_HOME/libexec/jsvc.amd64 -o -f $HADOOP_HOME/libexec/jsvc.i386 ] && [ -n "$HADOOP_SECURE_DN_USER" ]; then |
| TARGET_USER=root |
| fi |
| fi |
| su -s /bin/bash $TARGET_USER -c "$HADOOP_HOME/bin/hadoop-daemon.sh start @HADOOP_DAEMON@ $DAEMON_FLAGS" |
| |
| # Some processes are slow to start |
| sleep $SLEEP_TIME |
| } |
| stop() { |
| $HADOOP_HOME/bin/hadoop-daemon.sh stop @HADOOP_DAEMON@ |
| |
| if [ "@HADOOP_DAEMON@" = "datanode" ]; then |
| # Some processes are slow to stop |
| sleep $SLEEP_TIME |
| fi |
| } |
| |
| check_for_root() { |
| if [ $(id -ur) -ne 0 ]; then |
| echo 'Error: root user required' |
| echo |
| exit 1 |
| fi |
| } |
| |
| hadoop_service() { |
| case "$1" in |
| start) |
| check_for_root |
| echo -n "Starting $DESC: " |
| start |
| |
| if hadoop_check_pidfile $PID_FILE ; then |
| echo "$NAME." |
| else |
| echo "ERROR. Could not start $DESC" |
| exit 1 |
| fi |
| ;; |
| stop) |
| check_for_root |
| echo -n "Stopping $DESC: " |
| stop |
| |
| if hadoop_check_pidfile $PID_FILE ; then |
| echo "ERROR. Could not stop $DESC" |
| exit 1 |
| else |
| echo "$NAME." |
| fi |
| ;; |
| force-stop) |
| check_for_root |
| echo -n "Forcefully stopping $DESC: " |
| hadoop_stop_pidfile $PID_FILE |
| |
| if ! hadoop_check_pidfile $PID_FILE ; then |
| echo "$NAME." |
| else |
| echo "ERROR. Could not force stop $DESC" |
| exit 1 |
| fi |
| ;; |
| force-reload) |
| check_for_root |
| echo -n "Forcefully reloading $DESC: " |
| hadoop_check_pidfile $PID_FILE && $0 restart |
| ;; |
| restart) |
| check_for_root |
| echo -n "Restarting $DESC: " |
| stop |
| [ -n "$DODTIME" ] && sleep $DODTIME |
| $0 start |
| ;; |
| status) |
| echo -n "$NAME is " |
| if hadoop_check_pidfile $PID_FILE ; then |
| echo "running" |
| else |
| echo "not running." |
| exit 1 |
| fi |
| ;; |
| *) |
| N=/etc/init.d/$NAME |
| if [ "@HADOOP_DAEMON@" = "namenode" ]; then |
| if [ "$1" = "upgrade" -o "$1" = "rollback" ]; then |
| DAEMON_FLAGS=-$1 $0 start |
| exit $? |
| else |
| echo "Usage: $N {start|stop|restart|force-reload|status|force-stop|upgrade|rollback}" >&2 |
| exit 1 |
| fi |
| else |
| echo "Usage: $N {start|stop|restart|force-reload|status|force-stop}" >&2 |
| exit 1 |
| fi |
| ;; |
| esac |
| } |
| |
| hadoop_service "$1" |
| |
| exit 0 |
