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infrastructure/databases/redis/SKILL.md

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+---
+name: redis
+description: Configure Redis for caching and data storage. Set up clustering, persistence, and Sentinel. Use when implementing Redis caching or queues.
+license: MIT
+metadata:
+  author: devops-skills
+  version: "1.0"
+---
+
+# Redis
+
+Configure Redis for caching and data storage.
+
+## Installation & Setup
+
+```bash
+# Install
+apt install redis-server
+
+# Configuration
+# /etc/redis/redis.conf
+bind 0.0.0.0
+protected-mode yes
+requirepass yourpassword
+maxmemory 256mb
+maxmemory-policy allkeys-lru
+```
+
+## Basic Operations
+
+```bash
+redis-cli -a yourpassword
+
+# String operations
+SET key "value"
+GET key
+SETEX key 3600 "value"  # With TTL
+
+# Hash
+HSET user:1 name "John" email "john@example.com"
+HGETALL user:1
+
+# List
+LPUSH queue "task1"
+RPOP queue
+```
+
+## Persistence
+
+```bash
+# RDB (snapshot)
+save 900 1
+save 300 10
+
+# AOF (append-only file)
+appendonly yes
+appendfsync everysec
+```
+
+## Sentinel (HA)
+
+```bash
+# sentinel.conf
+sentinel monitor mymaster 10.0.0.1 6379 2
+sentinel down-after-milliseconds mymaster 30000
+sentinel failover-timeout mymaster 180000
+```
+
+## Best Practices
+
+- Set maxmemory and eviction policy
+- Use persistence for critical data
+- Implement Sentinel for HA
+- Monitor memory usage