在redhat6.4安装redis集群【教程】

　　参考:

　　http://redis.io/topics/cluster-tutorial(主要是Creating a Redis Cluster using the create-cluster script部分)

　　https://ruby.taobao.org/

　　安装一款不熟悉的软件前先看INSTALL,README,这是习惯,生产上要建立普通用户并调节适当参数,下面是以root身份安装运行.

　　下载解压并安装redis

　　make test提示需要更高版本的tcl,跳到安装过程可能遇到的问题

wget http://download.redis.io/releases/redis-3.0.7.tar.gz
tar xf redis-3.0.7.tar.gz 
cd redis-3.0.7
mkdir -p /opt/redis
make test
make PREFIX=/opt/redis install

　　复制两个脚本到安装的目录

　cp ~/redis-3.0.7/class="lazy" data-src/redis-trib.rb /opt/redis/

　　cp ~/redis-3.0.7/utils/create-cluster/create-cluster /opt/redis/1212

　

　　根据实际修改/opt/redis/create-cluster.改动的地方有几处

　　a.增加了三个变量BASEDIR,BINDIR和DATADIR,

　　b.修改相关命令路径,

　　c.start前,先进入DATADIR,start后,返回原目录

　　d.clean前,先进入DATADIR,start后,返回原目录

　　e.create的host由127.0.0.1改为192.168.1.194(不改有时会报Too many Cluster redirections)

　　下面是修改后的shell

　#!/bin/bash

　　# Settings

　　PORT=30000

　　TIMEOUT=2000

　　NODES=6

　　REPLICAS=1

　　BASEDIR=/opt/redis

　　BINDIR=$BASEDIR/bin

　　DATADIR=$BASEDIR/data

 
　　# You may want to put the above config parameters into config.sh in order to

　　# override the defaults without modifying this script.

　　if [ -a config.sh ]

　　then

　　source "config.sh"

　　fi

　　# Computed vars

　　ENDPORT=$((PORT+NODES))

　　if [ "$1" == "start" ]

　　then

　　cd $DATADIR

　　while [ $((PORT < ENDPORT)) != "0" ]; do

　　PORT=$((PORT+1))

　　echo "Starting $PORT"

　　$BINDIR/redis-server --port $PORT --cluster-enabled yes --cluster-config-file nodes-${PORT}.conf --cluster-node-timeout $TIMEOUT --appendonly yes --appendfilename appendonly-${PORT}.aof --dbfilename dump-${PORT}.rdb --logfile ${PORT}.log --daemonize yes

　　done

　　cd -

　　exit 0

　　fi

　　if [ "$1" == "create" ]

　　then

　　HOSTS=""

　　while [ $((PORT < ENDPORT)) != "0" ]; do

　　PORT=$((PORT+1))

　　HOSTS="$HOSTS 192.168.1.194:$PORT"

　　done

　　$BASEDIR/redis-trib.rb create --replicas $REPLICAS $HOSTS

　　exit 0

　　fi

　　if [ "$1" == "stop" ]

　　then

　　while [ $((PORT < ENDPORT)) != "0" ]; do

　　PORT=$((PORT+1))

　　echo "Stopping $PORT"

　　$BINDIR/redis-cli -p $PORT shutdown nosave

　　done

　　exit 0

　　fi

　　if [ "$1" == "watch" ]

　　then

　　PORT=$((PORT+1))

　　while [ 1 ]; do

　　clear

　　date

　　$BINDIR/redis-cli -p $PORT cluster nodes | head -30

　　sleep 1

　　done

　　exit 0

　　fi

　　if [ "$1" == "tail" ]

　　then

　　INSTANCE=$2

　　PORT=$((PORT+INSTANCE))

　　tail -f ${PORT}.log

　　exit 0

　　fi

　　if [ "$1" == "call" ]

　　then

　　while [ $((PORT < ENDPORT)) != "0" ]; do

　　PORT=$((PORT+1))

　　$BINDIR/redis-cli -p $PORT $2 $3 $4 $5 $6 $7 $8 $9

　　done

　　exit 0

　　fi

　　if [ "$1" == "clean" ]

　　then

　　cd $DATADIR

　　rm -rf *.log

　　rm -rf appendonly*.aof

　　rm -rf dump*.rdb

　　rm -rf nodes*.conf

　　cd -

　　exit 0

　　fi

　　echo "Usage: $0 [start|create|stop|watch|tail|clean]"

　　echo "start -- Launch Redis Cluster instances."

　　echo "create -- Create a cluster using redis-trib create."

　　echo "stop -- Stop Redis Cluster instances."

　　echo "watch -- Show CLUSTER NODES output (first 30 lines) of first node."

　　echo "tail -- Run tail -f of instance at base port + ID."

　　echo "clean -- Remove all instances data, logs, configs."123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102

　　不要忘了创建数据目录mkdir -p /opt/redis/data

　　根据上面的参考,启动集群和停止集群

　　启动集群:先敲入/opt/redis/create-cluster start回车,再敲入/opt/redis/create-cluster create回车,再输入yes回车

　　停止集群:敲入/opt/redis/create-cluster stop回车

　　如果以前启动过,造成不一致数据,create时就会报错,可先/opt/redis/create-cluster clean

　　测试

<dependency>
 <groupId>redis.clients</groupId>
 <artifactId>jedis</artifactId>
 <version>2.8.1</version>
</dependency>

　　声明JedisCluster Bean

@Bean
 public JedisCluster jedisCluster(){
  Set<HostAndPort> nodes=new HashSet<>(3);
  nodes.add(new HostAndPort("192.168.1.194",30001));
  nodes.add(new HostAndPort("192.168.1.194",30002));
  nodes.add(new HostAndPort("192.168.1.194",30003));
  return new JedisCluster(nodes,2000,5);
 }

　　测试set和get

 AnnotationConfigApplicationContext context= new AnnotationConfigApplicationContext(AppConfig.class);
  JedisCluster jedisCluster = (JedisCluster) context.getBean("jedisCluster");
  jedisCluster.set("xxx","123");
  System.out.println("jedisCluster.get = " + jedisCluster.get("xxx"));

　　安装过程可能遇到的问题:

　　make test时,提醒You need tcl 8.5 or newer in order to run the Redis test.到http://www.tcl.tk/software/tcltk/download.html下载Tcl,

wget http://prdownloads.sourceforge.net/tcl/tcl8.5.19-class="lazy" data-src.tar.gz
tar xf tcl8.5.19-class="lazy" data-src.tar.gz
cd tcl8.5.19/unix
./configure
make
make test
make install

　　因为create-cluster create会调用redis-trib.rb,它是一个ruby脚本,所以提示没有安装ruby,就先安装yum install -y ruby

　　如果提示加载rubygems错误,使用以下办法安装rubygems

　　a.https://rubygems.org/pages/download下载tgz格式的安装包(wget可能不通,在windows用旋风或迅雷下载)

　　b.mount -t cifs -o username=xiejx618,password=123456 //192.168.1.115/share /share

cp /share/rubygems-2.6.4.tgz ./
tar xf rubygems-2.6.4.tgz
cd rubygems-2.6.4
ruby setup.rb

　　如果再提示no such file to load ? rdoc/rdoc,就先安装yum install -y rdoc

　　如果再提示 no such file to load ? redis,就使用gem install redis -v 3.0.7

　　gem又是因为墙原因无法使用默认源,就修改为淘宝源

　　可能用到的几个命令

　　帮助:gem sources --help

　　查看源:gem sources -l

　　删除源:gem sources -r https://rubygems.org/

　　添加源:gem sources -a https://ruby.taobao.org/

　　更新源缓存:gem sources -u