How do you monitor Redis with Prometheus and Grafana?

Redis monitoring uses exporters to collect metrics, Prometheus for storage, and Grafana for visualization and alerting.\n\n• **Redis Exporter Setup:**\nCollects Redis metrics and exposes them in Prometheus format, monitors multiple instances, and provides comprehensive statistics.\n\ndocker run -d --name redis-exporter \n -p 9121:9121 \n -e REDIS_ADDR=redis://localhost:6379 \n oliver006/redis_exporter\n\n• **Key Metrics to Monitor:**\nOperations per second, memory usage, hit ratio, connected clients, replication lag, and slow query count.\n\n• **Prometheus Configuration:**\nscrape_configs:\n - job_name: redis\n static_configs:\n - targets: ["redis-exporter:9121"]\n scrape_interval: 15s\n\n• **Grafana Dashboard:**\nVisualize performance trends, set up alerts for thresholds, create custom panels, and monitor multiple Redis instances.\n\n• **Alert Rules:**\nHigh memory usage (>80%), low hit ratio (<90%), connection spikes, replication failures, and slow query accumulation.\n\n• **Custom Metrics:**\nBusiness-specific counters, queue lengths, cache effectiveness, and application performance indicators.\n\n• **Benefits:**\nReal-time monitoring, historical analysis, proactive alerting, capacity planning, and performance optimization insights.\n\n• **Best Practices:**\nSet appropriate alert thresholds, create runbooks for common issues, monitor both system and business metrics, and regularly review dashboards.