How to easily configure Redis clusters in CentOS
Apr 14, 2025 pm 04:06 PMConfiguring 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
-
Install Redis :
sudo yum install epel-release sudo yum install redis
-
Start Redis service :
sudo systemctl start redis sudo systemctl enable redis
Configure Redis cluster
-
Create a Redis configuration file directory :
sudo mkdir -p /etc/redis-cluster
-
Copy the default configuration file to the cluster directory :
sudo cp /etc/redis.conf /etc/redis-cluster/redis-cluster.conf
-
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
-
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
-
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
-
Check cluster status :
redis-cli --clister check 127.0.0.1:7000
-
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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