To configure a Redis cluster, you need to follow several steps. The configuration involves setting up multiple Redis nodes and modifying configuration files with specific settings.
Let's go through these steps:
Install Redis: Make sure to have Redis installed on all machines that will serve as nodes in the cluster.
Configure redis.conf file: On each node, modify the
redis.conf file. Uncomment (or add) and set the
cluster-enabled option to
yes, and specify the
cluster-node-timeout. Here is an example:
nodes.conf file, specified by
cluster-config-file, will be created automatically in the same directory as your
redis.conf file. The
cluster-node-timeout is the maximum amount of time in milliseconds a node can be unreachable before considered as failing.
Start the Redis instances: Now start the Redis server on each of the nodes using the
Create the cluster: Once you have all Redis servers running, use the
redis-cli tool to create a new cluster. Use the
--cluster create command followed by the IP address and port number of each of your nodes. For example:
Then, follow the instructions provided by the
redis-cli tool. Usually, it suggests a configuration of slots among the nodes and asks for confirmation.
Test the cluster: You can use the
redis-cli tool to interact with your cluster and check if everything is working correctly. The
--cluster check command gives a summary of the cluster:
By following these steps, you should have a functioning Redis cluster that can handle failovers and provide high availability. Note that this is a basic configuration, and for production environments, additional settings and considerations might be required, such as data persistence and security settings.