install redis

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
sudo yum install redis

sudo systemctl start redis
sudo systemctl enable redis
sudo systemctl status redis

# driver
git clone https://github.com/phpredis/phpredis.git
cd phpredis
make clean
git submodule update --init
phpize
./configure
make
make install
echo "extension=redis.so" > /etc/php.d/00-redis.ini