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How to start redis in linux environment

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2019-06-29 11:47:2620372browse

How to start redis in linux environment

启动redis

redis可执行文件说明:

redis-server:redis服务器

redis-cli:redis命令行客户端

redis-benchmark:redis性能测试工具

redis-check-aof:aof文件修复工具

redis-check-dump:rdb文件检查工具

1、直接启动

直接运行redis-server即可以启动redis

redis服务器默认会使用6379端口,通过--port参数可以自定义端口号:

redis-server --port 6380

如果出现警告:

WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. 

To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.

过量使用内存设置为0!在低内存环境下,后台保存可能失败。为了修正这个问题,请在/etc/sysctl.conf 添加一项 'vm.overcommit_memory = 1' ,然后重启(或者运行命令'sysctl vm.overcommit_memory=1' )使其生效。

按这个提示来做,警告排除。

2、通过初始化脚本启动redis

redis源码目录的utils文件夹中有一个名为redis-init_script的初始化脚本文件

步骤

(1)配置初始化脚本。

首先将初始化脚本复制到/etc/init.d目录中,文件名为redis_端口号(redis_6379),然后修改脚本第6行的REDISPORT的变量值为同样的端口号(ubuntu)

如果是centos或者redhat则使用以下脚本(端口号根据实际情况修改)

#chkconfig: 2345 90 10

#description: Redis is a persistent key-value database

PATH=/usr/local/bin:/sbin:/usr/bin:/bin

REDISPORT=6379

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

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

PIDFILE=/var/run/redis_6379.pid

CONF="/etc/redis/6379.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

if [ "$?"="0" ]

then

echo "Redis is running..."

fi

;;

stop)

if [ ! -f $PIDFILE ]

then

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

else

PID=$(cat $PIDFILE)

echo "Stopping ..."

$REDIS_CLI -p $REDISPORT SHUTDOWN

while [ -x ${PIDFILE} ]

do

echo "Waiting for Redis to shutdown ..."

sleep 1

done

echo "Redis stopped"

fi

;;

restart|force-reload)

${0} stop

${0} start

;;

*)

echo "Usage: /etc/init.d/redis_6379 {start|stop|restart|force-reload}" >&2

exit 1

esac

(2)建立需要的文件夹

/etc/redis    存放redis配置文件

/var/redis/端口号    存放redis的持久化文件

(3)修改配置文件

把配置文件模板复制到/etc/redis目录中,已端口号命名(如“6379.conf”)

需要修改的配置及说明:

daemonize  yes:使redis以守护进程模式运行

pidfile /var/run/redis_端口号.pid:设置redis的pid文件位置

port 端口号:设置redis监听的端口号

 dir /var/redis/端口号:设置持久化文件存放位置

设置开机启动服务:

sudo update-rc.d redis_端口号 defaults // 告诉系统启动时候,自动执行redis_端口号 这个脚本。(ubuntu)

更多Redis相关知识,请访问Redis使用教程栏目!

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