Success!
For others, the install that worked for me on a Centos 8 instance:
sudo dnf install redis nano
sudo nano /etc/redis.conf (change line "supervised no" to "supervised systemd"; save and exit)
sudo systemctl start redis.service
sudo systemctl enable redis
Check status if service to confirm running:
sudo systemctl status redis
redis-cli ping (receive back PONG)
Setup redis in Wappler:
