环境要求
telnet 192.168.1.160 2181 telnet 192.168.1.160 20880
| 软件 | 版本 | 下载 |
|---|---|---|
| CentOS | CentOS Linux release 7.4.1708 (Core) | |
| jdk | Java(TM) SE Runtime Environment (build 1.8.0_151-b12) | |
| zookeeper | zookeeper-3.4.11 |
下载解压
CentOS7 Java 省略，已经安装好了
wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.11/zookeeper-3.4.11.tar.gztar xzf zookeeper-3.4.11.tar.gzcp zookeeper-3.4.11 /usr/local/tree /usr/local/zookeeper-3.4.11
- bin目录
zk的可执行脚本目录，包括zk服务进程，zk客户端，等脚本。其中，.sh是Linux环境下的脚本，.cmd是Windows环境下的脚本。
- conf目录
配置文件目录。zoo_sample.cfg为样例配置文件，需要修改为自己的名称，一般为zoo.cfg。log4j.properties为日志配置文件。
- contrib目录
一些用于操作zk的工具包。
- recipes目录
zk某些用法的代码示例
配置说明
cp zoo_sample.cfg zoo.cfg
修改配置文件zoo.cfg
# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial# synchronization phase can takeinitLimit=10# The number of ticks that can pass between# sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just# example sakes.dataDir=/data/zookeeper/datadataLogDir=/data/zookeeper/logs# the port at which the clients will connectclientPort=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# 下面三项还没有配置server.1=zk149:2888:3888server.2=zk150:2888:3888server.3=zk151:2888:3888
配置项说明
- initLimit
ZooKeeper集群模式下包含多个zk进程，其中一个进程为leader，余下的进程为follower。 当follower最初与leader建立连接时，它们之间会传输相当多的数据，尤其是follower的数据落后leader很多。initLimit配置follower与leader之间建立连接后进行同步的最长时间。
- syncLimit
配置follower和leader之间发送消息，请求和应答的最大时间长度。
- tickTime
tickTime则是上述两个超时配置的基本单位，例如对于initLimit，其配置值为5，说明其超时时间为 2000ms * 5 = 10秒。
- server.|
=host:port1:port2 其中id为一个数字，表示zk进程的id，这个id也是dataDir目录下myid文件的内容。host是该zk进程所在的IP地址，port1表示follower和leader交换消息所使用的端口，port2表示选举leader所使用的端口。
- dataDir
配置的含义跟单机模式下的含义类似，不同的是集群模式下还有一个myid文件。myid文件的内容只有一行，且内容只能为1 - 255之间的数字，这个数字亦即上面介绍server.id中的id，表示zk进程的id。
- dataLogDir
zookeeper日志存储路径
配置环境变量
vim /etc/profile
# /etc/profile# System wide environment and startup programs, for login setup# Functions and aliases go in /etc/bashrc# It's NOT a good idea to change this file unless you know what you# are doing. It's much better to create a custom.sh shell script in# /etc/profile.d/ to make custom changes to your environment, as this# will prevent the need for merging in future updates.pathmunge () { case ":${PATH}:" in *:"$1":*) ;; *) if [ "$2" = "after" ] ; then PATH=$PATH:$1 else PATH=$1:$PATH fi esac}if [ -x /usr/bin/id ]; then if [ -z "$EUID" ]; then # ksh workaround EUID=`/usr/bin/id -u` UID=`/usr/bin/id -ru` fi USER="`/usr/bin/id -un`" LOGNAME=$USER MAIL="/var/spool/mail/$USER"fi# Path manipulationif [ "$EUID" = "0" ]; then pathmunge /usr/sbin pathmunge /usr/local/sbinelse pathmunge /usr/local/sbin after pathmunge /usr/sbin afterfiHOSTNAME=`/usr/bin/hostname 2>/dev/null`HISTSIZE=1000if [ "$HISTCONTROL" = "ignorespace" ] ; then export HISTCONTROL=ignorebothelse export HISTCONTROL=ignoredupsfiexport PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL# By default, we want umask to get set. This sets it for login shell# Current threshold for system reserved uid/gids is 200# You could check uidgid reservation validity in# /usr/share/doc/setup-*/uidgid fileif [ $UID -gt 199 ] && [ "`/usr/bin/id -gn`" = "`/usr/bin/id -un`" ]; then umask 002else umask 022fifor i in /etc/profile.d/*.sh ; do if [ -r "$i" ]; then if [ "${-#*i}" != "$-" ]; then . "$i" else . "$i" >/dev/null fi fidoneunset iunset -f pathmungeexport PATH=/usr/local/php/bin:/usr/local/nginx/sbin:/usr/local/openssl/bin:$PATHexport PS1="\[\e]0;\a\]\n\[\e[1;32m\]\[\e[1;33m\]\H\[\e[1;35m\]<\$(date +\"%Y-%m-%d %T\")> \[\e[32m\]\w\[\e[0m\]\n\u>\\$ "#export CATALINA_HOME=/usr/local/java/apache-tomcat-8.5.24export JAVA_HOME=/usr/local/java/jdk1.8.0_151export JRE_HOME=/usr/local/java/jdk1.8.0_151/jreexport CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib:$CLASSPATH:$CATALINA_HOMEexport PATH=$JAVA_HOME/bin:$PATHZOOKEEPER_HOME=/usr/local/zookeeper-3.4.11export PATH=$ZOOKEEPER_HOME/bin:$PATH 刷新环境变量
source /etc/profile
关闭系统防火墙或配置防火墙规则
直接关闭防火墙
systemctl stop firewalld.service
禁止firewall开机启动 禁用防火墙命令
systemctl disable firewalld.service
停止防火墙
systemctl stop firewalld.service
zookeeper命令
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-3.4.9/bin/../conf/zoo.cfg Starting zookeeper ... STARTED
查看zookeeper 服务状态
zkServer.sh status
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 defaultUsing config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfgStopping zookeeper ... STOPPED
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 defaultUsing config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfgZooKeeper JMX enabled by defaultUsing config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfgStopping zookeeper ... STOPPEDZooKeeper JMX enabled by defaultUsing config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfgStarting zookeeper ... STARTED
zookeeper自启动服务
vim /etc/rc.d/init.d/zookeeper
#!/bin/bash#chkconfig:2345 20 90#description:zookeeper#processname:zookeeperexport JAVA_HOME=/usr/local/java/jdk1.8.0_151export ZOOKEEPER_HOME=/usr/local/zookeeper-3.4.11case $1 in start) su root $ZOOKEEPER_HOME/bin/zkServer.sh start;; stop) su root $ZOOKEEPER_HOME/bin/zkServer.sh stop;; status) su root $ZOOKEEPER_HOME/bin/zkServer.sh status;; restart) su $ZOOKEEPER_HOME/bin/zkServer.sh restart;; *) echo "require start|stop|status|restart" ;;esac
给zookeeper脚本授可执行权限
chmod +x /etc/rc.d/init.d/zookeeper
添加开机自启动服务
chkconfig --add zookeeper
查看自启动状态
chkconfig --list