sudo yum install epel-release yum-utils
sudo yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm
sudo yum-config-manager --enable remi

安装

sudo yum install redis

启动，并设置随机启动

sudo systemctl start redis
sudo systemctl enable redis

查看状态

sudo systemctl status redis

正确结果如下

redis.service - Redis persistent key-value database
Loaded: loaded (/usr/lib/systemd/system/redis.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/redis.service.d
        └─limit.conf
Active: active (running) since Sat 2018-11-24 15:21:55 PST; 40s ago
Main PID: 2157 (redis-server)
CGroup: /system.slice/redis.service
        └─2157 /usr/bin/redis-server 127.0.0.1:6379

END

参考 https://linuxize.com/post/how-to-install-and-configure-redis-on-centos-7/