This article provides a guide to 15 essential metrics for monitoring Kubernetes environments. It focuses on how these metrics can help optimize performance, troubleshoot issues, and maintain system health. The content is aimed at developers and IT operations teams.

This article explains Kubernetes metrics and their importance in monitoring cluster health and performance. It covers various types of metrics, such as cluster, node, pod, network, storage, and application metrics, along with tools for effective monitoring.

Pinterest encountered a significant performance issue during the migration of its search infrastructure, Manas, to Kubernetes, where one in a million search requests experienced latency spikes. The investigation revealed that cAdvisor’s memory monitoring processes were causing excessive contention, leading to these delays. The team resolved the issue by disabling a specific metric in cAdvisor, allowing them to continue their migration efforts without compromising performance.

By implementing a php-fpm-exporter in a Kubernetes environment, the author identified severe underutilization of PHP-FPM processes due to a misconfigured shared configuration file. After analyzing the traffic patterns and adjusting the PHP-FPM settings accordingly, memory utilization was reduced by over 80% without sacrificing performance. The article emphasizes the importance of customizing configurations based on specific application needs rather than relying on default settings.