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一、目标

编译安装最新版的redis

二、安装步骤

1、redis官方下载页面

Downloads - Redis

2、下载最新版的redis源码包

注：此时的最新稳定版是 redis 7.2.5

wget https://download.redis.io/redis-stable.tar.gz

3、安装编译环境

yum install -y gcc gcc-c++

4、解压并编译安装

tar -zxf redis-stable.tar.gz
cd redis-stable
make PREFIX=/usr/local/redis install
mkdir /usr/local/redis/etc
cp redis.conf /usr/local/redis/etc/redis.conf

注：PREFIX=/usr/local/redis 指定redis安装目录

5、设置环境变量

vi /etc/profile# 追加如下内容
export PATH=$PATH:/usr/local/redis/bin# 保存退出# 使生效
source /etc/profile

6、修改系统参数

vi /etc/security/limits.conf# 追加如下两行*	soft	nofile	102400*	hard	nofile	102400

echo -e "net.core.somaxconn = 511\nvm.overcommit_memory = 1" >> /etc/sysctl.conf
sysctl -p

注：不做这一步的话，会报错如下：

7127:C 05 Jul 2024 14:04:36.683 # WARNING Memory overcommit must be enabled! Without it, a background save or replication may fail under low memory condition. Being disabled, it can also cause failures without low memory condition, see https://github.com/jemalloc/jemalloc/issues/1328. 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.

7127:M 05 Jul 2024 14:04:36.683 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.

 7、手动启动和停止redis

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

注：这样会在前台启动。

如果想后台启动，需要修改配置文件。然后重启redis即可直接跑到后台运行了

vi /usr/local/redis/etc/redis.conf

将【daemonize no】改为【daemonize yes】

redis-cli shutdown
或
pkill redis-server

8、将redis启动交给systemd托管

vi /etc/systemd/system/redis.service# 写上如下内容
[Unit]
Description=redis
Documentation=https://redis.io
After=network.target[Service]
User=redis
Group=redis
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf
ExecStop=/usr/local/redis/bin/redis-cli shutdown
Restart=on-failure[Install]
WantedBy=multi-user.target

9、创建redis系统账号

注：由于systemd启动脚本里指定了启动redis的用户为redis，所以必须创建相应的账号，并赋予权限。

groupadd redis && useradd -r -g redis -s /sbin/nologin redis
chown -R redis.redis /usr/local/redis

10、将redis加入开机自启

注：如果交给systemd托管了，那么就可以用下面这个方法，让其开机自启

systemctl enable redis

11、（附）部分配置介绍

【daemonize no】改为【daemonize yes】
# 启动redis后不进入后台，想让其进入后台就改为yes。但如果托管给systemd的话这里不用改【# requirepass foobared】 更改为【requirepass serena0129】
#开启redis认证，设备密码为serena0129【logfile ""】改为【logfile "/var/log/redis.log"】
#将redis路径设定为/var/log/redis.log