How to Install and Configure Redis on CentOS 8
3 min read
Redis is an open-source in-memory key-value data store. It can be used as a database, cache and, message broker and supports various data structures such as Strings, Hashes, Lists, Sets, and more. Redis provides high availability via Redis Sentinel and automatic partitioning across multiple Redis nodes with Redis Cluster.
This guide covers the installation and configuration of Redis on CentOS 8.
Installing Redis on CentOS 8
Redis version 5.0.x is included in the default CentOS 8 repositories. To install it run the following commands as root or user with sudo privileges:
sudo dnf install redis-server
Once the installation is completed, enable and start the Redis service:
sudo systemctl enable --now redis
To check whether the Redis server is running, type:
sudo systemctl status redis
● 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 2020-02-08 20:54:46 UTC; 7s ago
That’s it. You have Redis installed and running on your CentOS 8 server.
Configure Redis Remote Access
By default, Redis doesn’t allow remote connections. You can connect to the Redis server only from 127.0.0.1 (localhost) - the machine where Redis is running.
If you are using a single server setup, where the client connecting to the database is also running on the same host, you should not enable remote access.
To configure Redis to accept remote connections open the Redis configuration file with your text editor:
sudo nano /etc/redis.conf
Locate the line that begins with
bind 127.0.0.1 and add your server private IP address after
bind 127.0.0.1 192.168.121.233
Make sure you replace
192.168.121.233 with your IP address. Save the file and close the editor.
Restart the Redis service for changes to take effect:
sudo systemctl restart redis
Use the following
ss command to verify that the Redis server is listening on your private interface on port
ss -an | grep 6379
You should see something like below:
tcp LISTEN 0 128 192.168.121.233:6379 0.0.0.0:* tcp LISTEN 0 128 127.0.0.1:6379 0.0.0.0:*
Next, you’ll need to configure your firewall to enable traffic from on TCP port
Typically you would want to allow access to the Redis server only from a specific IP address or IP range. For example, to allow connections only from
192.168.121.0/24, run the following commands:
sudo firewall-cmd --new-zone=redis --permanent
sudo firewall-cmd --zone=redis --add-port=6379/tcp --permanent
sudo firewall-cmd --zone=redis --add-source=192.168.121.0/24 --permanent
sudo firewall-cmd --reload
The commands above create a new zone named
redis, opens the port
6379 and allows access from the private network.
At this point, the Redis server will accept remote connections on TCP port 6379.
Make sure your firewall is configured to accept connections only from trusted IP ranges.
To verify that everything is set up properly, you can try to ping the Redis server from your remote machine using the
redis-cli utility which provides a command-line interface to a Redis server:
redis-cli -h <REDIS_IP_ADDRESS> ping
The command should return a response of
We’ve shown you how to install Redis on CentOS 8. To learn more about how to use Redis, visit their official documentation page.
If you have questions, feel free to leave a comment below.