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Table of Contents
Prerequisites
Configure Redis cluster
Verify cluster
Home Operation and Maintenance CentOS How to easily configure Redis clusters in CentOS

How to easily configure Redis clusters in CentOS

Apr 14, 2025 pm 04:06 PM
redis centos tool red

Configuring a Redis cluster on CentOS can be achieved through the following steps. Here is a basic guide, assuming you have CentOS 7 or higher installed and Redis is already installed.

Prerequisites

  1. Install Redis :

     sudo yum install epel-release
    sudo yum install redis
    
  2. Start Redis service :

     sudo systemctl start redis
    sudo systemctl enable redis
    

Configure Redis cluster

  1. Create a Redis configuration file directory :

     sudo mkdir -p /etc/redis-cluster
    
  2. Copy the default configuration file to the cluster directory :

     sudo cp /etc/redis.conf /etc/redis-cluster/redis-cluster.conf
    
  3. Edit the Redis configuration file : Open the /etc/redis-cluster/redis-cluster.conf file and make the following modifications:

     sudo vi /etc/redis-cluster/redis-cluster.conf
    

    Modify the following parameters:

    • port: Set the port of the Redis instance.
    • cluster-enabled: Set to yes to enable cluster mode.
    • cluster-config-file: Set the cluster configuration file path.
    • cluster-node-timeout: Set the node timeout time.
    • appendonly: Set to yes to enable AOF persistence.

    Sample configuration:

     port 7000
    cluster-enabled yes
    cluster-config-file nodes.conf
    cluster-node-timeout 5000
    appendonly yes
    
  4. Start multiple Redis instances : Create a configuration file for each Redis instance and start them. For example, create three Redis instances:

     sudo cp /etc/redis-cluster/redis-cluster.conf /etc/redis-cluster/redis-cluster-7000.conf
    sudo cp /etc/redis-cluster/redis-cluster.conf /etc/redis-cluster/redis-cluster-7001.conf
    sudo cp /etc/redis-cluster/redis-cluster.conf /etc/redis-cluster/redis-cluster-7002.conf
    

    Edit the configuration file of each instance and modify the port parameters:

     sudo vi /etc/redis-cluster/redis-cluster-7000.conf
    sudo vi /etc/redis-cluster/redis-cluster-7001.conf
    sudo vi /etc/redis-cluster/redis-cluster-7002.conf
    

    Modified configuration example:

     port 7000
    cluster-enabled yes
    cluster-config-file nodes-7000.conf
    cluster-node-timeout 5000
    appendonly yes
    

    Start each instance:

     sudo redis-server /etc/redis-cluster/redis-cluster-7000.conf
    sudo redis-server /etc/redis-cluster/redis-cluster-7001.conf
    sudo redis-server /etc/redis-cluster/redis-cluster-7002.conf
    
  5. Create a Redis cluster : Create a cluster using the redis-cli tool. Suppose you have three nodes, each running on a different port (7000, 7001, 7002):

     redis-cli --clister create 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 --clister-replicas 1
    

    Parameter description:

    • --cluster create: Create a cluster.
    • 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002: The address and port of the cluster node.
    • --cluster-replicas 1: Each master node has a slave node.

Verify cluster

  1. Check cluster status :

     redis-cli --clister check 127.0.0.1:7000
    
  2. Test cluster functions :

     redis-cli -c -p 7000 set test_key "Hello, Redis Cluster!"
    redis-cli -c -p 7001 get test_key
    

Through the above steps, you should be able to successfully configure a Redis cluster on CentOS. Depending on actual needs, you can add more nodes and slaves and make corresponding configuration adjustments.

The above is the detailed content of How to easily configure Redis clusters in CentOS. For more information, please follow other related articles on the PHP Chinese website!

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