How to install Redis server on RHEL 8 / CentOS 8 Linux

In this tutorial we will discuss an installation of Redis server and client on RHEL 8 / CentOS 8. This tutorial also includes optional steps on how to allow remote connections to Redis sever running on RHEL 8.

In this tutorial you will learn:

• How to install Redis server
• How to install Redis client
• How to enable Redis server to start after system boot
• How to allow remote connections to Redis server
• How to open firewall ports to allow incoming connections to Redis server
• How to check Redis versionr

Software Requirements and Conventions Used

Software Requirements and Linux Command Line Conventions

Category	Requirements, Conventions or Software Version Used
System	RHEL 8 / CentOS 8
Software	Redis server 4.0.10
Other	Privileged access to your Linux system as root or via the sudo command.
Conventions	# - requires given linux commands to be executed with root privileges either directly as a root user or by use of sudo command $ - requires given linux commands to be executed as a regular non-privileged user

How to install redis server on RHEL 8 step by step instructions

1. Install Redis server package:

   # dnf install redis
   

   The above command will install Redis server as well as Redis client on your RHEL 8 / CentOS 8 Linux host.
2. Start Redis server and enable systemd service in order for the server to start after reboot:

   # systemctl start redis
   # systemctl enable redis
   

3. Check Redis server version to confirm the correctness of the installation:

   # redis-server -v
   

4. Connect to Redis server by using the redis-cli command line client:

   # redis-cli 
   127.0.0.1:6379> ping
   PONG
   127.0.0.1:6379>
   

   All done. The below steps are optional to allow remote connections to Redis server if required.

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5. Allow remote connections:
   
   First, enable the Redis server to listen on all network interfaces instead of the default local 127.0.0.1 loopback interface.
   
   To do so open the Redis configuration file /etc/redis.conf and comment the bind 127.0.0.1 ::1: line:

   FROM:
   bind 127.0.0.1 ::1
   TO:
   # bind 127.0.0.1 ::1

Next, disable protected-mode to allow for remote connections. Open the Redis configuration file /etc/redis.conf and change the following line:

FROM:
protected-mode yes
TO:
protected-mode no

6. Restart Redis server:

   # systemctl restart redis-server
   

7. Open firewall ports to allow Redis incoming traffic:

   # firewall-cmd --zone=public --permanent --add-service=redis
   # firewall-cmd --reload
   

8. Connect to a Redis server from a remote host using the redis-cli command line client:

   $ redis-cli -h REDISHOSTNAME_OR_IPADDRESS
   rhel8-redis:6379> INFO
   # Server
   redis_version:4.0.10