启动多个logstash脚本

一台服务器上启动多个logstash脚本

# more logstash_click
#!/bin/sh
# Init script for logstash
# Maintained by Elasticsearch
# Generated by pleaserun.
# Implemented based on LSB Core 3.1:
#   * Sections: 20.2, 20.3
#
### BEGIN INIT INFO
# Provides:          logstash
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description:
# Description:        Starts Logstash as a daemon.
### END INIT INFO  

PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/logstash/bin
export PATH  

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

# adirname - return absolute dirname of given file
adirname() { odir=`pwd`; cd `dirname $1`; pwd; cd "${odir}"; }
MYNAME=`basename "$0"`
MYDIR=`adirname "$0"`
LS_LOG_DIR="${MYDIR}/logs"
LS_DATA_PATH="${MYDIR}/data"
LS_CONF_DIR="${MYDIR}/conf.d"

name="${MYNAME}"

LS_USER=elasticsearch
LS_GROUP=elasticsearch
LS_HOME=/usr/local/logstash
LS_HEAP_SIZE="256m"
#LS_LOG_DIR=/usr/local/logstash/logs
LS_LOG_FILE="${LS_LOG_DIR}/$name.log"
pidfile="${LS_LOG_DIR}/$name.pid"
#LS_CONF_DIR=/usr/local/logstash/conf.d
LS_OPEN_FILES=16384
LS_NICE=19
KILL_ON_STOP_TIMEOUT=${KILL_ON_STOP_TIMEOUT-0} #default value is zero to this variable but could be updated by user request
LS_OPTS=""  

[ -r /etc/default/$name ] && . /etc/default/$name
[ -r /etc/sysconfig/$name ] && . /etc/sysconfig/$name  

program=$LS_HOME/bin/logstash
args=" -f ${LS_CONF_DIR} --path.data=${LS_DATA_PATH} -l ${LS_LOG_FILE} ${LS_OPTS}"  

quiet() {
  "$@" > /dev/null 2>&1
  return $?
}  

start() {  

  LS_JAVA_OPTS="${LS_JAVA_OPTS} -Djava.io.tmpdir=${LS_HOME}"
  HOME=${LS_HOME}
  export PATH HOME LS_HEAP_SIZE LS_JAVA_OPTS LS_USE_GC_LOGGING LS_GC_LOG_FILE  

  # chown doesn't grab the suplimental groups when setting the user:group - so we have to do it for it.
  # Boy, I hope we're root here.
  SGROUPS=$(id -Gn "$LS_USER" | tr " " "," | sed 's/,$//'; echo '')  

  if [ ! -z $SGROUPS ]
  then
        EXTRA_GROUPS="--groups $SGROUPS"
  fi  

  # set ulimit as (root, presumably) first, before we drop privileges
  ulimit -n ${LS_OPEN_FILES}  

  # Run the program!
  nice -n ${LS_NICE} chroot --userspec $LS_USER:$LS_GROUP $EXTRA_GROUPS / sh -c "
    cd $LS_HOME
    ulimit -n ${LS_OPEN_FILES}
    $program $args > ${LS_LOG_DIR}/$name.stdout" 2> "${LS_LOG_DIR}/$name.err" &  

  # Generate the pidfile from here. If we instead made the forked process
  # generate it there will be a race condition between the pidfile writing
  # and a process possibly asking for status.
  echo $! > $pidfile  

  echo "$name started."
  return 0
}  

stop() {
  # Try a few times to kill TERM the program
  if status ; then
    pid=`cat "$pidfile"`
    echo "Killing $name (pid $pid) with SIGTERM"
    ps -ef |grep $pid |grep -v 'grep' |awk '{print $2}' | xargs kill -9
    # Wait for it to exit.
    for i in 1 2 3 4 5 6 7 8 9 ; do
      echo "Waiting $name (pid $pid) to die..."
      status || break
      sleep 1
    done
    if status ; then
      if [ $KILL_ON_STOP_TIMEOUT -eq 1 ] ; then
        echo "Timeout reached. Killing $name (pid $pid) with SIGKILL. This may result in data loss."
        kill -KILL $pid
        echo "$name killed with SIGKILL."
      else
        echo "$name stop failed; still running."
        return 1 # stop timed out and not forced
      fi
    else
      echo "$name stopped."
    fi
  fi
}  

status() {
  if [ -f "$pidfile" ] ; then
    pid=`cat "$pidfile"`
    if kill -0 $pid > /dev/null 2> /dev/null ; then
      # process by this pid is running.
      # It may not be our pid, but that's what you get with just pidfiles.
      # TODO(sissel): Check if this process seems to be the same as the one we
      # expect. It'd be nice to use flock here, but flock uses fork, not exec,
      # so it makes it quite awkward to use in this case.
      return 0
    else
      return 2 # program is dead but pid file exists
    fi
  else
    return 3 # program is not running
  fi
}  

configtest() {
  # Check if a config file exists
  if [ ! "$(ls -A ${LS_CONF_DIR}/* 2> /dev/null)" ]; then
    echo "There aren't any configuration files in ${LS_CONF_DIR}"
    return 1
  fi  

  HOME=${LS_HOME}
  export PATH HOME  

  test_args="-t -f ${LS_CONF_DIR} ${LS_OPTS} "
  $program ${test_args}
  [ $? -eq 0 ] && return 0
  # Program not configured
  return 6
}  

case "$1" in
  start)
    status
    code=$?
    if [ $code -eq 0 ]; then
      echo "$name is already running"
    else
      start
      code=$?
    fi
    exit $code
    ;;
  stop) stop ;;
  force-stop) force_stop ;;
  status)
    status
    code=$?
    if [ $code -eq 0 ] ; then
      echo "$name is running"
    else
      echo "$name is not running"
    fi
    exit $code
    ;;
  reload) reload ;;
  restart)
    stop && start
    ;;
  check)
    configtest
    exit $?
    ;;
  *)
    echo "Usage: $SCRIPTNAME {start|stop|status|restart|check}" >&2
    exit 3
  ;;
esac  

exit $?