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在redhat6.4安装redis集群【教程】

  • 时间:2020-11-10 23:21:54
  • Redis
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  •   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/

      安装一个不熟悉的软件前先看INSTALL,README,这是习惯,生产上要建立普公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/src/redis-trib.rb /opt/redis/
    
      cp ~/redis-3.0.7/utils/create-cluster/create-cluster /opt/redis/1212
    
     

      根据实际改/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.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-src.tar.gz
    tar xf tcl8.5.19-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/

      升级源缓存:gem sources -u

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