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rajibmitra/elastic-startup.sh

Created October 24, 2019 10:24
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  1. rajibmitra created this gist Oct 24, 2019.
    220 changes: 220 additions & 0 deletions elastic-startup.sh
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    Original file line number Diff line number Diff line change
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    #!/bin/sh
    #
    # /etc/init.d/elasticsearch -- startup script for Elasticsearch
    #
    # Written by Miquel van Smoorenburg <[email protected]>.
    # Modified for Debian GNU/Linux by Ian Murdock <[email protected]>.
    # Modified for Tomcat by Stefan Gybas <[email protected]>.
    # Modified for Tomcat6 by Thierry Carrez <[email protected]>.
    # Additional improvements by Jason Brittain <[email protected]>.
    # Modified by Nicolas Huray for Elasticsearch <[email protected]>.
    #
    ### BEGIN INIT INFO
    # Provides: elasticsearch
    # Required-Start: $network $remote_fs $named
    # Required-Stop: $network $remote_fs $named
    # Default-Start: 2 3 4 5
    # Default-Stop: 0 1 6
    # Short-Description: Starts elasticsearch
    # Description: Starts elasticsearch using start-stop-daemon
    ### END INIT INFO

    PATH=/bin:/usr/bin:/sbin:/usr/sbin
    NAME=elasticsearch
    DESC="Elasticsearch Server"
    DEFAULT=/etc/default/$NAME

    if [ `id -u` -ne 0 ]; then
    echo "You need root privileges to run this script"
    exit 1
    fi


    . /lib/lsb/init-functions

    if [ -r /etc/default/rcS ]; then
    . /etc/default/rcS
    fi


    # The following variables can be overwritten in $DEFAULT

    # Run Elasticsearch as this user ID and group ID
    ES_USER=elasticsearch
    ES_GROUP=elasticsearch

    # The first existing directory is used for JAVA_HOME (if JAVA_HOME is not defined in $DEFAULT)
    JDK_DIRS="/usr/lib/jvm/java-8-oracle/ /usr/lib/jvm/j2sdk1.8-oracle/ /usr/lib/jvm/jdk-7-oracle-x64 /usr/lib/jvm/java-7-oracle /usr/lib/jvm/j2sdk1.7-oracle/ /usr/lib/jvm/jav
    a-7-openjdk /usr/lib/jvm/java-7-openjdk-amd64/ /usr/lib/jvm/java-7-openjdk-armhf /usr/lib/jvm/java-7-openjdk-i386/ /usr/lib/jvm/default-java"

    # Look for the right JVM to use
    for jdir in $JDK_DIRS; do
    if [ -r "$jdir/bin/java" -a -z "${JAVA_HOME}" ]; then
    JAVA_HOME="$jdir"
    fi
    done
    export JAVA_HOME

    # Directory where the Elasticsearch binary distribution resides
    ES_HOME=/usr/share/$NAME

    # Heap size defaults to 256m min, 1g max
    # Set ES_HEAP_SIZE to 50% of available RAM, but no more than 31g
    #ES_HEAP_SIZE=2g

    # Heap new generation
    #ES_HEAP_NEWSIZE=

    # max direct memory
    #ES_DIRECT_SIZE=

    # Additional Java OPTS
    #ES_JAVA_OPTS=

    # Maximum number of open files
    MAX_OPEN_FILES=65535

    # Maximum amount of locked memory
    #MAX_LOCKED_MEMORY=

    # Elasticsearch log directory
    LOG_DIR=/var/log/$NAME

    # Elasticsearch data directory
    DATA_DIR=/var/lib/$NAME

    # Elasticsearch work directory
    WORK_DIR=/tmp/$NAME

    # Elasticsearch configuration directory
    CONF_DIR=/etc/$NAME

    # Elasticsearch configuration file (elasticsearch.yml)
    CONF_FILE=$CONF_DIR/elasticsearch.yml

    # Maximum number of VMA (Virtual Memory Areas) a process can own
    MAX_MAP_COUNT=262144

    # End of variables that can be overwritten in $DEFAULT

    # overwrite settings from default file
    if [ -f "$DEFAULT" ]; then
    . "$DEFAULT"
    fi

    # Define other required variables
    PID_FILE=/var/run/$NAME.pid
    DAEMON=$ES_HOME/bin/elasticsearch
    DAEMON_OPTS="-d -p $PID_FILE --default.config=$CONF_FILE --default.path.home=$ES_HOME --default.path.logs=$LOG_DIR --default.path.data=$DATA_DIR --default.path.work=$WORK_
    DIR --default.path.conf=$CONF_DIR"

    export ES_HEAP_SIZE
    export ES_HEAP_NEWSIZE
    export ES_DIRECT_SIZE
    export ES_JAVA_OPTS

    # Check DAEMON exists
    test -x $DAEMON || exit 0

    checkJava() {
    if [ -x "$JAVA_HOME/bin/java" ]; then
    JAVA="$JAVA_HOME/bin/java"
    else
    JAVA=`which java`
    fi

    if [ ! -x "$JAVA" ]; then
    echo "Could not find any executable java binary. Please install java in your PATH or set JAVA_HOME"
    exit 1
    fi
    }

    case "$1" in
    start)
    checkJava

    if [ -n "$MAX_LOCKED_MEMORY" -a -z "$ES_HEAP_SIZE" ]; then
    log_failure_msg "MAX_LOCKED_MEMORY is set - ES_HEAP_SIZE must also be set"
    exit 1
    fi

    log_daemon_msg "Starting $DESC"

    pid=`pidofproc -p $PID_FILE elasticsearch`
    if [ -n "$pid" ] ; then
    log_begin_msg "Already running."
    log_end_msg 0
    exit 0
    fi

    # Prepare environment
    mkdir -p "$LOG_DIR" "$DATA_DIR" "$WORK_DIR" && chown "$ES_USER":"$ES_GROUP" "$LOG_DIR" "$DATA_DIR" "$WORK_DIR"
    touch "$PID_FILE" && chown "$ES_USER":"$ES_GROUP" "$PID_FILE"

    if [ -n "$MAX_OPEN_FILES" ]; then
    ulimit -n $MAX_OPEN_FILES
    fi

    if [ -n "$MAX_LOCKED_MEMORY" ]; then
    ulimit -l $MAX_LOCKED_MEMORY
    fi

    if [ -n "$MAX_MAP_COUNT" -a -f /proc/sys/vm/max_map_count ]; then
    sysctl -q -w vm.max_map_count=$MAX_MAP_COUNT
    fi

    # Start Daemon
    start-stop-daemon --start -b --user "$ES_USER" -c "$ES_USER" --pidfile "$PID_FILE" --exec $DAEMON -- $DAEMON_OPTS
    return=$?
    if [ $return -eq 0 ]
    then
    i=0
    timeout=10
    # Wait for the process to be properly started before exiting
    until { cat "$PID_FILE" | xargs kill -0; } >/dev/null 2>&1
    do
    sleep 1
    i=$(($i + 1))
    [ $i -gt $timeout ] && log_end_msg 1
    done
    else
    log_end_msg $return
    fi
    ;;
    stop)
    log_daemon_msg "Stopping $DESC"

    if [ -f "$PID_FILE" ]; then
    start-stop-daemon --stop --pidfile "$PID_FILE" \
    --user "$ES_USER" \
    --retry=TERM/20/KILL/5 >/dev/null
    if [ $? -eq 1 ]; then
    log_progress_msg "$DESC is not running but pid file exists, cleaning up"
    elif [ $? -eq 3 ]; then
    PID="`cat $PID_FILE`"
    log_failure_msg "Failed to stop $DESC (pid $PID)"
    exit 1
    fi
    rm -f "$PID_FILE"
    else
    log_progress_msg "(not running)"
    fi
    log_end_msg 0
    ;;
    status)
    status_of_proc -p $PID_FILE elasticsearch elasticsearch && exit 0 || exit $?
    ;;
    restart|force-reload)
    if [ -f "$PID_FILE" ]; then
    $0 stop
    sleep 1
    fi
    $0 start
    ;;
    *)
    log_success_msg "Usage: $0 {start|stop|restart|force-reload|status}"
    exit 1
    ;;
    esac

    exit 0