Install & Configure Redis on RHEL / CentOS 8
Redis is an open-source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. Today we’ll install & configure Redis on RHEL / CentOS 8 server.
Table of Contents
Install Redis Server
Redis server is available in default CentOS 8 repositories. To install the Redis server package run this command:
sudo dnf install -y redisNow enable & start Redis using:
# enable
sudo systemctl enable redis
# start
sudo systemctl start redisCheck Redis server version to confirm the installation:
redis-server -vLet’s check redis-cli:
# start cli
redis-cli
# type ping
127.0.0.1:6379> ping
# output
PONG
# type exit to exit cli
127.0.0.1:6379> exitTest Redis
Start redis cli and try to set & get data:
# start cli
redis-cli
# set data
set myName "Obydul"
# get data
get myName
# output
"Obydul"
# type exit to exit cli
127.0.0.1:6379> exitIf you see the results like above then Redis is working on your server perfetly.
Open Firewalld Port
If you’re using Firewalld, then follow this step otherwise skip this step. Let’s open Redis port 6379 permanently:
sudo firewall-cmd --add-port=6379/tcp --permanentWe’ve opened the Redis port. We can also allow external server IP to access our Redis server. To do this, we need to provide access like this:
sudo firewall-cmd --zone=redis --add-source=CLIENT_IP_ADDRESS --permanentReplace CLIENT_IP_ADDRESS with your external server IP.
The reload the firewall:
sudo firewall-cmd --reloadMore Info
To allow remote connection we’ve to bind remote IP. Add the external server IP after bind 127.0.0.1:
# open config file
sudo nano /etc/redis.conf
# find 'bind' and add IP
bind 127.0.0.1 CLIENT_IP_ADDRESSTo know more about Redis, please read their documentation.
Allow Redis in PHP
To allow Redis in PHP, we need to install & configure phpredis. Please have a look at this article: Install phpredis on CentOS 8 / RHEL 8.
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