Redis安装

1、yum方式-安装redis

1.1、配置仓库

gzip /etc/yum.repos.d/*
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
curl -o /etc/yum.repos.d/epel-7.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum clean all
yum makecache

1.2、yum安装

yum install redis -y

2、源码方式-安装redis

2.1、下载软件

mkdir -p /data/softs && cd /data/softs
curl -o redis-6.2.5.tar.gz https://download.redis.io/releases/redis-6.2.5.tar.gz

2.2、安装

2.2.1、编译安装

yum install gcc make cmake -y
tar xvf redis-6.2.5.tar.gz && cd redis-6.2.5
make && make PREFIX=/usr/local/redis-6.2.5/ install

2.2.2、查看效果

]# tree /usr/local/redis-6.2.5/
/usr/local/redis-6.2.5/
└── bin
    ├── redis-benchmark                  # 性能测试工具
    ├── redis-check-aof -> redis-server  # 修复有问题的AOF文件
    ├── redis-check-rdb -> redis-server  # 修复有问题的dump.rdb文件
    ├── redis-cli                        # 客户端，操作入口
    ├── redis-sentinel -> redis-server   # Redis集群使用
    └── redis-server                     # Redis服务器启动命令

2.3、配置环境变量

cat << 'CAT_END' > /etc/profile.d/redis.sh
#!/bin/bash
export redis_home=/usr/local/redis-6.2.5
PATH=$PATH:$redis_home/bin
CAT_END
source /etc/profile

2.4、准备配置文件和创建基本目录

mkdir /usr/local/redis-6.2.5/{etc,log,data,run} -p
cd /data/softs/redis-6.2.5 && cp redis.conf sentinel.conf /usr/local/redis-6.2.5/etc/

2.5、服务启动脚本

2.5.1、shell脚本

cat << 'CAT_END' >/usr/local/redis-6.2.5/redis.server
#!/bin/sh
#
# Simple Redis init.d script conceived to work on Linux systems
# as it does use of the /proc filesystem.

REDISPORT=6379
REDIS_HOME=/usr/local/redis-6.2.5
EXEC=$REDIS_HOME/bin/redis-server
CLIEXEC=$REDIS_HOME/bin/redis-cli

PIDFILE=/var/run/redis_${REDISPORT}.pid
CONF=$REDIS_HOME/etc/${REDISPORT}.conf

function start(){
  if [ `ps -ef | grep redis-server | grep -v grep  | wc -l` -eq 1 ]
  then
    echo "$PIDFILE exists, process is already running or crashed"
  else
    echo "Starting Redis server..."
    rm -f $PIDFILE
    $EXEC $CONF
  fi
}
function 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
}
case "$1" in
  start)
    start
      ;;
  stop)
    stop
      ;;
  restart)
    stop;
    sleep 3;
    start;
        ;;
esac
CAT_END
chmod 755 /usr/local/redis-6.2.5/redis.server
cp /usr/local/redis-6.2.5/etc/redis.conf /usr/local/redis-6.2.5/etc/6379.conf

2.5.2、systemd的配置

cat << 'CAT_END' > /lib/systemd/system/redis.service
[Unit]
Description=Redis server daemon
Documentation=/home/application/redis
After=network.target

[Service]
Type=forking
ExecStart=/usr/local/redis-6.2.5/redis.server start  --supervised systemd
ExecStop=/usr/local/redis-6.2.5/redis.server stop  --supervised systemd
Restart=/usr/local/redis-6.2.5/redis.server restart  --supervised systemd
PrivateTmp=True

[Install]
WantedBy=multi-user.target
CAT_END

systemctl daemon-reload

2.6、简单调优

# 根据提示，调优如下：
cat >>/etc/sysctl.conf<<EOF
vm.overcommit_memory=1
EOF
sysctl -p

#最大连接数
echo 511 > /proc/sys/net/core/somaxconn

3、程序启动方式

3.1、前台启动

redis-server /usr/local/redis-6.2.5/etc/redis.conf

3.2、多实例启动

redis-server /usr/local/redis-6.2.5/etc/redis.conf --port 6666
redis-server /usr/local/redis-6.2.5/etc/redis.conf --port 7777
redis-server /usr/local/redis-6.2.5/etc/redis.conf --port 8888
redis-server /usr/local/redis-6.2.5/etc/redis.conf --port 9999


]# netstat -tunlp | grep redis
tcp        0      0 0.0.0.0:9999            0.0.0.0:*               LISTEN      24840/redis-server  
tcp        0      0 0.0.0.0:8888            0.0.0.0:*               LISTEN      24835/redis-server  
tcp        0      0 0.0.0.0:7777            0.0.0.0:*               LISTEN      24830/redis-server  
tcp        0      0 0.0.0.0:6666            0.0.0.0:*               LISTEN      24825/redis-server 

3.3、后台启动

3.3.1、配置redis

sed -i '/^daemonize/c daemonize yes' /usr/local/redis-6.2.5/etc/redis.conf
sed -i '/^bind/c bind *' /usr/local/redis-6.2.5/etc/redis.conf 

3.3.2、命令启动方法

redis-server /usr/local/redis-6.2.5/etc/redis.conf

3.3.3、systemd启动方法

systemctl restart redis

3.4、关闭redis服务

3.4.1、systemd关闭

systemctl stop redis

3.4.2、命令关闭

redis-cli -p 6379 shutdown

3.4.3、kill -9 关闭 

yum install lsof -y
kill -9 $(lsof -Pti :6379)