Configure and Manage Redis Clusters

This skill provides production-ready Redis Cluster configuration, deployment, and operations guidance: architecture fundamentals covering 16384-hash-slot sharding, master-replica topology, gossip-protocol cluster state, client-side slot routing, and a minimum of three master nodes for quorum; a full redis.conf template for cluster nodes covering cluster settings, memory limits and eviction policy, persistence via RDB save intervals plus AOF, security settings like requirepass, masterauth, protected-mode, and bind, and logging; a Docker Compose setup for a three-node cluster; cluster lifecycle commands to create a cluster with replicas, verify status via cluster info and cluster nodes, add master or replica nodes, reshard slots, and remove a node after draining it. It also covers high-availability practices - replicas spread across availability zones, cluster-require-full-coverage, replica-validity-factor, and replication-lag monitoring - a bash health-check script that pings nodes and checks cluster_state, performance tuning around maxmemory-policy, memory fragmentation, hash-max-ziplist-entries, connection pooling, and tcp-keepalive, a Python RedisCluster client configuration example, troubleshooting for cluster state corruption and split-brain prevention, slot-migration monitoring and repair via --cluster fix, and security and backup guidance including TLS for inter-node traffic, Redis 6+ ACLs, password rotation, and tested RDB/AOF backup restoration.

Use it when configuring, deploying, scaling, or troubleshooting a Redis Cluster deployment across multiple nodes - sharding strategy, high-availability setup, performance tuning, or diagnosing split-brain and migration issues. Do not treat its output as a substitute for environment-specific validation, testing, or expert review, and stop for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

Given a target topology - node count, availability zones, workload profile - it produces redis.conf templates, Docker Compose manifests, redis-cli cluster commands for creation, scaling, and repair, client configuration snippets, and health-check or troubleshooting scripts.

redis-cli --cluster create 10.0.1.10:6379 10.0.1.11:6379 10.0.1.12:6379 10.0.1.13:6379 10.0.1.14:6379 10.0.1.15:6379 --cluster-replicas 1

Works with redis-cli's cluster subcommands, Docker Compose for local multi-node testing, and language clients such as Python's RedisCluster; it also recommends network-level integrations like VPC or security groups and TLS for inter-node traffic in sensitive environments.

Infrastructure and backend engineers deploying or operating Redis Cluster at scale who need concrete configs, high-availability topology guidance, and a troubleshooting playbook for slot migration, split-brain, and cluster-state issues, rather than generic single-node Redis advice. It also connects the Python client configuration - startup nodes, decode_responses, socket timeouts and keepalive, and a max_connections pool size - to the operational side, so client behavior stays consistent with how the cluster itself is tuned for timeouts and connection handling.