Zookeeper configuration files which help to create a Zookeeper ensemble for SolrCloud

java.env

ZOO_LOG_DIR=/var/log/zookeeper1
ZOO_LOG4J_PROP=INFO,ROLLINGFILE

log4j.properties

# Define some default values that can be overridden by system properties
zookeeper.root.logger=INFO, ROLLINGFILE
zookeeper.console.threshold=INFO
zookeeper.log.dir=/var/log/zookeeper1
zookeeper.log.file=zookeeper.log
zookeeper.log.threshold=DEBUG
zookeeper.tracelog.dir=/var/log/zookeeper1
zookeeper.tracelog.file=zookeeper_trace.log

#
# ZooKeeper Logging Configuration
#

# Format is "<default threshold> (, <appender>)+

# DEFAULT: console appender only
log4j.rootLogger=${zookeeper.root.logger}

# Example with rolling log file
#log4j.rootLogger=DEBUG, CONSOLE, ROLLINGFILE

# Example with rolling log file and tracing
#log4j.rootLogger=TRACE, CONSOLE, ROLLINGFILE, TRACEFILE

#
# Log INFO level and above messages to the console
#
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=${zookeeper.console.threshold}
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} [myid:%X{myid}] - %-5p [%t:%C{1}@%L] - %m%n

#
# Add ROLLINGFILE to rootLogger to get log file output
#    Log DEBUG level and above messages to a log file
log4j.appender.ROLLINGFILE=org.apache.log4j.RollingFileAppender
log4j.appender.ROLLINGFILE.Threshold=${zookeeper.log.threshold}
log4j.appender.ROLLINGFILE.File=${zookeeper.log.dir}/${zookeeper.log.file}

# Max log file size of 10MB
log4j.appender.ROLLINGFILE.MaxFileSize=10MB
# uncomment the next line to limit number of backup files
#log4j.appender.ROLLINGFILE.MaxBackupIndex=10

log4j.appender.ROLLINGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.ROLLINGFILE.layout.ConversionPattern=%d{ISO8601} [myid:%X{myid}] - %-5p [%t:%C{1}@%L] - %m%n


#
# Add TRACEFILE to rootLogger to get log file output
#    Log DEBUG level and above messages to a log file
log4j.appender.TRACEFILE=org.apache.log4j.FileAppender
log4j.appender.TRACEFILE.Threshold=TRACE
log4j.appender.TRACEFILE.File=${zookeeper.tracelog.dir}/${zookeeper.tracelog.file}

log4j.appender.TRACEFILE.layout=org.apache.log4j.PatternLayout
### Notice we are including log4j's NDC here (%x)
log4j.appender.TRACEFILE.layout.ConversionPattern=%d{ISO8601} [myid:%X{myid}] - %-5p [%t:%C{1}@%L][%x] - %m%n

zoo.cfg

# The number of milliseconds of each tick
tickTime=2000
 
# The number of ticks that the initial synchronization phase can take
initLimit=10
 
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
 
# the directory where the snapshot is stored.
# Choose appropriately for your environment
dataDir=/opt/zookeeper1/data
 
# the port at which the clients will connect
clientPort=2181
 
# the directory where transaction log is stored.
# this parameter provides dedicated log device for ZooKeeper
dataLogDir=/var/log/zookeeper1

# Max client connections (default 10)
maxClientCnxns=1000
 
# ZooKeeper server and its port no.
# ZooKeeper ensemble should know about every other machine in the ensemble
# specify server id by creating 'myid' file in the dataDir
# use hostname instead of IP address for convenient maintenance
server.1=localhost:2888:3888
server.2=localhost:2889:3889
server.3=localhost:2890:3890

zookeeper.sh

#! /usr/bin/env bash

# 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.

### BEGIN INIT INFO
# Provides:		zookeeper1
# Required-Start:	$remote_fs $syslog
# Required-Stop:	$remote_fs $syslog
# Default-Start:	2 3 4 5
# Default-Stop:	        0 1 6	
# Short-Description:	Apache ZooKeeper server
### END INIT INFO

# downloaded by
# https://svn.apache.org/repos/asf/zookeeper/trunk/src/packages/deb/init.d/zookeeper
# and modified according to installation

set -e

# /etc/init.d/zookeeper: start and stop the Apache ZooKeeper daemon

umask 022

. /opt/zookeeper1/bin/zkEnv.sh

. /lib/lsb/init-functions

ZOOPIDDIR=/opt/zookeeper1/data
ZOOPIDFILE=${ZOOPIDDIR}/zookeeper_server.pid

check_privsep_dir() {
    # Create the PrivSep empty dir if necessary
    if [ ! -d ${ZOOPIDDIR} ]; then
	echo Insied privsep
        mkdir -p ${ZOOPIDDIR}
	chmod 0775 ${ZOOPIDDIR} 
    fi
}

# Are we running from init?
run_by_init() {
    ([ "$previous" ] && [ "$runlevel" ]) || [ "$runlevel" = S ]
}

check_for_no_start() {
    # forget it if we're trying to start, and /etc/zookeeper/zookeeper_not_to_be_run exists
    if [ -e /etc/zookeeper/zookeeper_not_to_be_run ]; then 
	if [ "$1" = log_end_msg ]; then
	    log_end_msg 0
	fi
	if ! run_by_init; then
	    log_action_msg "Apache ZooKeeper server not in use (/etc/zookeeper/zookeeper_not_to_be_run)"
	fi
	exit 0
    fi
}

export PATH="${PATH:+$PATH:}/usr/sbin:/usr/bin:/opt/zookeeper1"

case "$1" in
  start)
	check_for_no_start
	check_privsep_dir
	log_daemon_msg "Starting Apache ZooKeeper server" "zookeeper"
	#if start-stop-daemon --start --quiet --oknodo --pidfile ${ZOOPIDFILE} -c zookeeper -x ${ZOOKEEPER_PREFIX}/bin/zkServer.sh start; then
	if start-stop-daemon --start --quiet --oknodo --pidfile ${ZOOPIDFILE} -x ${ZOOKEEPER_PREFIX}/bin/zkServer.sh start; then
	    log_end_msg 0
	else
	    log_end_msg 1
	fi
	;;
  stop)
	log_daemon_msg "Stopping Apache ZooKeeper server" "zookeeper"
	if start-stop-daemon --stop --quiet --oknodo --pidfile ${ZOOPIDFILE}; then
	    log_end_msg 0
	else
	    log_end_msg 1
	fi
	;;

  restart)
	check_privsep_dir
	log_daemon_msg "Restarting Apache ZooKeeper server" "zookeeper"
	start-stop-daemon --stop --quiet --oknodo --retry 30 --pidfile ${ZOOPIDFILE}
	check_for_no_start log_end_msg
	#if start-stop-daemon --start --quiet --oknodo --pidfile ${ZOOPIDFILE} -c zookeeper -x ${ZOOKEEPER_PREFIX}/bin/zkServer.sh start; then
	if start-stop-daemon --start --quiet --oknodo --pidfile ${ZOOPIDFILE} -x ${ZOOKEEPER_PREFIX}/bin/zkServer.sh start; then
	    log_end_msg 0
	else
	    log_end_msg 1
	fi
	;;

  try-restart)
	check_privsep_dir
	log_daemon_msg "Restarting Apache ZooKeeper server" "zookeeper"
	set +e
	start-stop-daemon --stop --quiet --retry 30 --pidfile ${ZOOPIDFILE}
	RET="$?"
	set -e
	case $RET in
	    0)
		# old daemon stopped
		check_for_no_start log_end_msg
		#if start-stop-daemon --start --quiet --oknodo --pidfile ${ZOOPIDFILE} -c zookeeper -x ${ZOOKEEPER_PREFIX}/bin/zkServer.sh start; then
		if start-stop-daemon --start --quiet --oknodo --pidfile ${ZOOPIDFILE} -x ${ZOOKEEPER_PREFIX}/bin/zkServer.sh start; then
		    log_end_msg 0
		else
		    log_end_msg 1
		fi
		;;
	    1)
		# daemon not running
		log_progress_msg "(not running)"
		log_end_msg 0
		;;
	    *)
		# failed to stop
		log_progress_msg "(failed to stop)"
		log_end_msg 1
		;;
	esac
	;;

  status)
	status_of_proc -p ${ZOOPIDFILE} ${JAVA_HOME}/bin/java zookeeper && exit 0 || exit $?
	;;

  *)
	log_action_msg "Usage: /etc/init.d/zookeeper {start|stop|restart|try-restart|status}"
	exit 1
esac

exit 0