JEESZ-Redis分布式缓存安装和使用

独立缓存服务器: LinuxCentOS

Redis版本: 3.0

下面我们针对于Redis安装做下详细的记录:

编译和安装所需的包:

#yum install gcc tcl创建安装目录:

#mkdir /usr/local/redis

解压:

#tar -zxvf 3.xx.tar.gz

#mv redis-3.xx redis3.0

#cd redis3.0安装(使用PREFIX指定安装目录):

#make PREFIX=/usr/local/redis install

安装完成后,可以看到/usr/local/redis目录下有一个bin目录,bin目录里就是redis的命令脚本:

redis-benchmark redis-check-aof redis-check-dumpredis-cli redis-server

将Redis配置成服务:

按上面的操作步骤,Redis的启动脚本为:/usr/local/src/redis3.0/utils/redis_init_script

将启动脚本复制到/etc/rc.d/init.d/目录下,并命名为redis

#cp /usr/local/src/redis3.0/utils/redis_init_script/etc/rc.d/init.d/redis编辑/etc/rc.d/init.d/redis,修改相应配置,使之能注册成为服务:

#vi/etc/rc.d/init.d/redis

#!/bin/sh

#

# Simple Redis init.d script conceived to work on Linux systems

# as it does use of the /proc filesystem.

REDISPORT=6379

EXEC=/usr/local/bin/redis-server

CLIEXEC=/usr/local/bin/redis-cli

PIDFILE=/var/run/redis_${REDISPORT}.pid

CONF="/etc/redis/${REDISPORT}.conf"

case "$1" in

start)

if [ -f $PIDFILE ]

then

echo "$PIDFILE exists, process is already running or crashed"

else

echo "Starting Redis server..."

$EXEC $CONF

fi

;;

stop)

if [ ! -f $PIDFILE ]

then

echo "$PIDFILE does not exist, process is not running"

else

PID=$(cat $PIDFILE)

echo "Stopping ..."

$CLIEXEC -p $REDISPORT shutdown

while [ -x /proc/${PID} ]

do

echo "Waiting for Redis to shutdown ..."

sleep 1

done

echo "Redis stopped"

fi

;;

*)

echo "Please use start or stop as first argument"

;;

esac

查看以上redis服务脚本,关注标为橙色的几个属性,做如下几个修改的准备:

(1)在脚本的第一行后面添加一行内容如下:

#chkconfig: 2345 80 90

提醒:如果不添加上面的内容,在注册服务时会提示:service redis does not support chkconfig

(2)REDISPORT端口保持6379不变;(特别注意:端口名将与下面的配置文件名有关)

(3)EXEC=/usr/local/bin/redis-server改为EXEC=/usr/local/redis/bin/redis-server

(4)CLIEXEC=/usr/local/bin/redis-cli改为CLIEXEC=/usr/local/redis/bin/redis-cli

(5)配置文件设置:

创建redis配置文件目录

#mkdir /usr/local/redis/conf

复制redis配置文件/usr/local/src/redis3.0/redis.conf到/usr/local/redis/conf目录并按端口号重命名为6379.conf

#cp /usr/local/src/redis3.0/redis.conf/usr/local/redis/conf/6379.conf

做了以上准备后,再对CONF属性作如下调整:

CONF="/etc/redis/${REDISPORT}.conf"改为CONF="/usr/local/redis/conf/${REDISPORT}.conf"

(6)更改redis开启的命令,以后台运行的方式执行:

$EXEC $CONF&#“&”作用是将服务转到后面运行

修改后的/etc/rc.d/init.d/redis服务脚本内容为:

#!/bin/sh

#chkconfig: 2345 80 90

#

# Simple Redis init.d script conceived to work on Linux systems

# as it does use of the /proc filesystem.

REDISPORT=6379

EXEC=/usr/local/redis/bin/redis-server

CLIEXEC=/usr/local/redis/bin/redis-cli

PIDFILE=/var/run/redis_${REDISPORT}.pid

CONF="/usr/local/redis/conf/${REDISPORT}.conf"

case "$1" in

start)

if [ -f $PIDFILE ]

then

echo "$PIDFILE exists, process is already running or crashed"

else

echo "Starting Redis server..."

$EXEC $CONF&

fi

;;

stop)

if [ ! -f $PIDFILE ]

then

echo "$PIDFILE does not exist, process is not running"

else

PID=$(cat $PIDFILE)

echo "Stopping ..."

$CLIEXEC -p $REDISPORT shutdown

while [ -x /proc/${PID} ]

do

echo "Waiting for Redis to shutdown ..."

sleep 1

done

echo "Redis stopped"

fi

;;

*)

echo "Please use start or stop as first argument"

;;

esac

以上配置操作完成后,便可将Redis注册成为服务:

#chkconfig --add redis

防火墙中打开对应的端口

#vi /etc/sysconfig/iptables

添加:

-A INPUT -m state --state NEW -m tcp -p tcp --dport6379 -j ACCEPT

重启防火墙:

#service iptables restart

修改redis配置文件设置:

#vi /usr/local/redis/conf/6379.conf

修改如下配置

daemonizeno改为daemonizeyes

备注:如果不改为yes,pid文件是不会生成,start、stop命令是不会生效的(依赖pid文件)

pidfile /var/run/redis.pid改为pidfile /var/run/redis_6379.pid

启动Redis服务

#service redis start

将Redis添加到环境变量中:

#vi /etc/profile

在最后添加以下内容:

## Redis env

export PATH=$PATH:/usr/local/redis/bin

使配置生效:

#source /etc/profile

当前可以直接使用redis-cli等redis命令了:

#redis-cli


关闭Redis服务

#service redis stop提醒:默认情况下,Redis开启安全认证,可以通过/usr/local/redis/conf/6379.conf的requirepass指定一个验证密码

在jeesz中主要使用redis做分布式缓存,存储登录用户信息,做session共享管理


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