centos 下 zookeeper3.4.11安装

1、创建 /usr/local/services/zookeeper 文件夹：

mkdir -p /usr/local/services/zookeeper

2、进入到 /usr/local/services/zookeeper 目录中：

cd /usr/local/services/zookeeper

3、下载 zookeeper-3.4.11.tar.gz：

  wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.11/zookeeper-3.4.11.tar.gz

4、解压缩 zookeeper-3.4.11.tar.gz：

tar -zxvf zookeeper-3.4.11.tar.gz

5、进入到 /usr/local/services/zookeeper/zookeeper-3.4.11/conf 目录中：

cd zookeeper-3.4.11/conf/

6、复制 zoo_sample.cfg 文件的并命名为为 zoo.cfg：

cp zoo_sample.cfg zoo.cfg

7、用 vim 打开 zoo.cfg 文件并修改其内容为如下：

# The number of milliseconds of each tick
 
    # zookeeper 定义的基准时间间隔，单位：毫秒
    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.
    # do not use /tmp for storage, /tmp here is just 
    # example sakes.
    # dataDir=/tmp/zookeeper
 
    # 数据文件夹
    dataDir=/usr/local/services/zookeeper/zookeeper-3.4.11/data
 
    # 日志文件夹
    dataLogDir=/usr/local/services/zookeeper/zookeeper-3.4.11/logs
 
    # the port at which the clients will connect
    # 客户端访问 zookeeper 的端口号
    clientPort=2181
 
    # the maximum number of client connections.
    # increase this if you need to handle more clients
    #maxClientCnxns=60
    #
    # Be sure to read the maintenance section of the 
    # administrator guide before turning on autopurge.
    #
    # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
    #
    # The number of snapshots to retain in dataDir
    #autopurge.snapRetainCount=3
    # Purge task interval in hours
    # Set to "0" to disable auto purge feature
    #autopurge.purgeInterval=1
　　
#集群地址配置
 server.1=192.168.1.21:2888:3888
 server.2=192.168.1.22:2888:3888
 server.3=192.168.1.23:2888:3888

保存并关闭 zoo.cfg 文件:

1. tickTime  = 2000：Zookeeper 服务器之间或客户端与服务器之间维持心跳的时间间隔，每隔tickTime时间就会发送一个心跳。

2. initLimit： 配置 Zookeeper 接受客户端（此客户端不是用户连接 Zookeeper 服务器的客户端，而是 Zookeeper 服务器集群中连接到 Leader 的 Follower 服务器）初始化连接时最长能忍受多少个心跳时间间隔数。当已超过initLimit个tickTime长度后 Zookeeper 服务器还没有收到客户端的返回信息，则表明客户端连接失败。总的时间长度就是 initLimit * tickTime 秒。

3. syncLimit： 配置 Leader 与 Follower 之间发送消息，请求和应答时间长度，最长不能超过多少个 tickTime 的时间长度，总的时间长度就是 syncLimit * tickTime 秒 

4. dataDir：   Zookeeper 保存数据的目录，默认情况下，Zookeeper 将写数据的日志文件也保存在这个目录里。

5. dataLogDir：若没提供的话则用dataDir。zookeeper的持久化都存储在这两个目录里。dataLogDir里是放到的顺序日志(WAL)。而dataDir里放的是内存数据结构的snapshot，便于快速恢复。为了达到性能最大化，一般建议把dataDir和dataLogDir分到不同的磁盘上，以充分利用磁盘顺序写的特性。

6. clientPort：Zookeeper服务器监听的端口，以接受客户端的访问请求。

7. server.A=B：C：D：其中 A 是一个数字，表示这个是第几号服务器；B 是这个服务器的 ip 地址；C 表示的是这个服务器与集群中的 Leader 服务器交换信息的端口；D 表示的是万一集群中的 Leader 服务器挂了，需要一个端口来重新进行选举，选出一个新的 Leader，此端口就是用来执行选举时服务器相互通信的端口。如果是伪集群的配置方式，由于 B 都是一样，所以不同的 Zookeeper 实例通信端口号不能一样，所以要给它们分配不同的端口号。

配置集群需要设置一个myid，在dataDir路径下新建myid文件，没有后缀格式

内容只需写当前服务器上几号服务器即可（上文中server.A=B：C：D：中的A）

8、打开指定端口并刷新防火墙配置

firewall-cmd --zone=public --add-port=2181/tcp --permanent
firewall-cmd --zone=public --add-port=2888/tcp --permanent
firewall-cmd --zone=public --add-port=3888/tcp --permanent
firewall-cmd --reload

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9、进入到 /usr/local/services/zookeeper/zookeeper-3.4.11/bin 目录中：

cd ../bin/

10、用 vim 打开 /etc/ 目录下的配置文件 profile：

vim /etc/profile

并在其尾部追加如下内容：

1     #zookeeper-3.4.11 config start
2  
3     export ZOOKEEPER_HOME=/usr/local/services/zookeeper/zookeeper-3.4.11/
4     export PATH=$ZOOKEEPER_HOME/bin:$PATH
5     export PATH
6  
7     #zookeeper-3.4.11 config end

profile修改

11、使 /etc/ 目录下的 profile 文件即可生效：

source /etc/profile

12、启动 zookeeper 服务：

zkServer.sh start

如打印如下信息则表明启动成功：

ZooKeeper JMX enabled by default

Using config: /usr/local/services/zookeeper/zookeeper-3.4.11/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

13、查询 zookeeper 状态：

zkServer.sh status

14、关闭 zookeeper 服务：

zkServer.sh stop

如打印如下信息则表明成功关闭：

ZooKeeper JMX enabled by default

Using config: /usr/local/services/zookeeper/zookeeper-3.4.11/bin/../conf/zoo.cfg

Stopping zookeeper ... STOPPED

15、重启 zookeeper 服务：

zkServer.sh restart

如打印如下信息则表明重启成功：

ZooKeeper JMX enabled by default

Using config: /usr/local/services/zookeeper/zookeeper-3.4.11/bin/../conf/zoo.cfg

ZooKeeper JMX enabled by default

Using config: /usr/local/services/zookeeper/zookeeper-3.4.11/bin/../conf/zoo.cfg

Stopping zookeeper ... STOPPED

ZooKeeper JMX enabled by default

Using config: /usr/local/services/zookeeper/zookeeper-3.4.11/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

此时zookeeper已经安装完成，但是我发现日志并没有按照上面设置的logs目录进行输出，所以还需要调整一下日志的输出位置和级别

/usr/local/services/zookeeper/zookeeper-3.4.11/conf

此目录下，log4j.properties文件

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


# 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
#按照日期每天输出logs
log4j.appender.ROLLINGFILE=org.apache.log4j.DailyRollingFileAppender
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

此目录下的/usr/local/services/zookeeper/zookeeper-3.4.11/bin

zkEnv.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.

# This script should be sourced into other zookeeper
# scripts to setup the env variables

# We use ZOOCFGDIR if defined,
# otherwise we use /etc/zookeeper
# or the conf directory that is
# a sibling of this script's directory

ZOOBINDIR="${ZOOBINDIR:-/usr/bin}"
ZOOKEEPER_PREFIX="${ZOOBINDIR}/.."

if [ "x$ZOOCFGDIR" = "x" ]
then
  if [ -e "${ZOOKEEPER_PREFIX}/conf" ]; then
    ZOOCFGDIR="$ZOOBINDIR/../conf"
  else
    ZOOCFGDIR="$ZOOBINDIR/../etc/zookeeper"
  fi
fi

if [ -f "${ZOOCFGDIR}/zookeeper-env.sh" ]; then
  . "${ZOOCFGDIR}/zookeeper-env.sh"
fi

if [ "x$ZOOCFG" = "x" ]
then
    ZOOCFG="zoo.cfg"
fi

ZOOCFG="$ZOOCFGDIR/$ZOOCFG"

if [ -f "$ZOOCFGDIR/java.env" ]
then
    . "$ZOOCFGDIR/java.env"
fi

if [ "x${ZOO_LOG_DIR}" = "x" ]
then
    #日志输出路径 不需mkdir zookeeper启动时自动创建
    ZOO_LOG_DIR="/usr/local/services/zookeeper/zookeeper-3.4.11/logs"
fi

if [ "x${ZOO_LOG4J_PROP}" = "x" ]
then
    #日志级别与log4j配置文件设置同步
    ZOO_LOG4J_PROP="INFO,ROLLINGFILE"
fi

if [ "$JAVA_HOME" != "" ]; then
  JAVA="$JAVA_HOME/bin/java"
else
  JAVA=java
fi

#add the zoocfg dir to classpath
CLASSPATH="$ZOOCFGDIR:$CLASSPATH"

for i in "$ZOOBINDIR"/../src/java/lib/*.jar
do
    CLASSPATH="$i:$CLASSPATH"
done

#make it work in the binary package
#(use array for LIBPATH to account for spaces within wildcard expansion)
if [ -e "${ZOOKEEPER_PREFIX}"/share/zookeeper/zookeeper-*.jar ]; then
  LIBPATH=("${ZOOKEEPER_PREFIX}"/share/zookeeper/*.jar)
else
  #release tarball format
  for i in "$ZOOBINDIR"/../zookeeper-*.jar
  do
    CLASSPATH="$i:$CLASSPATH"
  done
  LIBPATH=("${ZOOBINDIR}"/../lib/*.jar)
fi

for i in "${LIBPATH[@]}"
do
    CLASSPATH="$i:$CLASSPATH"
done

#make it work for developers
for d in "$ZOOBINDIR"/../build/lib/*.jar
do
   CLASSPATH="$d:$CLASSPATH"
done

#make it work for developers
CLASSPATH="$ZOOBINDIR/../build/classes:$CLASSPATH"

case "`uname`" in
    CYGWIN*) cygwin=true ;;
    *) cygwin=false ;;
esac

if $cygwin
then
    CLASSPATH=`cygpath -wp "$CLASSPATH"`
fi

#echo "CLASSPATH=$CLASSPATH"

此时再重启zk日志就会输出到指定的文件夹了