Redis启停脚本

1.概述

解决部分老系统，如Centos6上启停Redis服务的问题。

2.Redis自带脚本

• Redis安装包下载

wget http://download.redis.io/releases/redis-6.2.9.tar.gz

• 脚本存放在解压后安装包路径下utils目录中，redis_init_script与redis_init_script.tpl两个文件

[root@centos utils]# pwd
# 请将/home/redis-6.2.9替换为安装包解压路径
/home/redis-6.2.9/utils
# 查看服务管理脚本
[root@centos utils]# ll redis_init_script*
-rwxrwxr-x 1 root root 1352 5月  19 14:12 redis_init_script
-rwxrwxr-x 1 root root 1047 5月  19 14:12 redis_init_script.tpl

3.Redis安装

参见我另一篇笔记: Redis单例部署

4.修改Redis默认脚本

vim /etc/init.d/redis-server

#!/bin/sh
#
# Simple Redis init.d script conceived to work on Linux systems
# as it does use of the /proc filesystem.

### BEGIN INIT INFO
# Provides:     redis_6379
# Default-Start:        2 3 4 5
# Default-Stop:         0 1 6
# Short-Description:    Redis data structure server
# Description:          Redis data structure server. See https://redis.io
### END INIT INFO

# 服务主目录
REDIS_HOME=/usr/local/redis
# 服务端口
REDISPORT=6379
# 服务端程序路径
EXEC=${REDIS_HOME}/bin/redis-server
# 客户端程序路径
CLIEXEC=${REDIS_HOME}/bin/redis-cli

# PID文件路径，注意与redis.conf配置文件中保持一致
PIDFILE=/var/run/redis/redis_${REDISPORT}.pid
# 配置文件路径
CONF="${REDIS_HOME}/redis.conf"

# 定义运行服务的普通用户，需要提前创建
USER="redis"
#if [ `whoami` != "${USER}" ]; then
#        exec su - "${USER}"
#fi
# 定义sudo命令
CMD="/usr/bin/sudo -u ${USER}"


case "$1" in
    # 启动服务
    start)
        if [ -f $PIDFILE ]
        then
                echo "$PIDFILE exists, process is already running or crashed"
        else
                echo "Starting Redis server..."
                # 使用普通用户启动服务
                exec $CMD $EXEC $CONF
        fi
        ;;
    # 停止服务
    stop)
        if [ ! -f $PIDFILE ]
        then
                echo "$PIDFILE does not exist, process is not running"
        else
                PID=$(cat $PIDFILE)
                echo "Stopping ..."
                #$CLIEXEC -p $REDISPORT shutdown
                # 因为Redis设置了密码，所以修改停止服务命令。
                /bin/kill -s TERM ${PID}
                while [ -x /proc/${PID} ]
                do
                    echo "Waiting for Redis to shutdown ..."
                    sleep 1
                done
                /bin/rm -rf $PIDFILE
                echo "Redis stopped"
        fi
        ;;
    # 服务状态
    status)
        if [ ! -f $PIDFILE ]
        then
            echo 'Redis is not running'
        else
            PID=$(cat $PIDFILE)
            echo "Redis is running ($PID)"
        fi
        ;;
    # 重启服务
    restart)
        $0 stop
        sleep 1
        $0 start
        ;;
    *)
        echo "Please use start or stop as first argument"
        ;;
esac

5.注册为Service

检验脚本/etc/init.d/redis-server

• 确保程序和配置文件路径正确
• 确保端口是redis服务监听端口（会使用pid文件，pid文件与redis.conf中配置需一致）。

脚本添加执行权限

chmod +x /etc/init.d/redis-server

添加到redis-server服务

chkconfig --add redis-server

启用redis-server服务

# chkconfig redis-server on

6.功能验证

启动服务

[root@centos utils]# service redis-server start
Starting Redis server...

# 服务使用普通用户（redis）运行
[root@centos init.d]# ps -ef | grep 6379 | grep -v grep
redis    12530     1  0 18:54 ?        00:00:00 /usr/local/redis/bin/redis-server *:6379     

服务状态

[root@centos utils]# service redis-server status
Redis is running (11304)

[root@centos utils]# netstat -nltp | grep 6379 | grep -v grep
tcp        0      0 0.0.0.0:6379               0.0.0.0:*                   LISTEN      11304/redis-server  
tcp        0      0 :::6379                    :::*                        LISTEN      11304/redis-server  

重启服务

[root@centos utils]# service redis-server restart
Stopping ...
Waiting for Redis to shutdown ...
Redis stopped
Starting Redis server...

停止服务

[root@centos utils]# service redis-server stop
Stopping ...
Waiting for Redis to shutdown ...
Redis stopped