How to restart the redis cluster

The steps for Redis cluster restart are as follows: Close and clear data and logs. Start the seed node. Create a new cluster. Add remaining nodes. Check cluster status.

Redis cluster restart method

Step 1: Close the node

• To prevent data loss, close all Redis nodes in order.

• Execute the following commands to close each node:

  • redis-cli -h -p shutdown

Step 2: Clear the data and logs

• Delete the entire Redis data directory, usually located in /var/lib/redis .
• Delete node log files, usually located in /var/log/redis/.log .

Step 3: Start a single node

• Start a Redis instance as a seed node.

• Run the following command to start the seed node:

  • redis-server --port

Step 4: Create a new cluster

• Use the redis-trib.rb tool to create a new Redis cluster.

• Execute the following command:

  • redis-trib.rb create --replicas

Step 5: Add the remaining nodes

• Add the remaining nodes to the cluster in turn.

• Execute the following command:

  • redis-trib.rb add-node --cluster

Step 6: Check the cluster status

• Use redis-cli to check cluster status.

• Execute the following command:

  • redis-cli -c --cluster check

The cluster should be in normal operation and all nodes should be reported as "up".

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