Learn how to secure and optimize cloud infrastructure in this 15-minute conference talk from OpenSSF. Explore effective strategies for managing security across hundreds of applications in hybrid and multi-cloud architectures. Discover how Popeye, an open-source cluster sanitizer tool, can cleanse and optimize underlying infrastructure through 20 unique sanitizers. Master techniques for identifying critical issues including resource allocation problems, RBAC misconfigurations, and various Kubernetes object vulnerabilities. Gain practical insights for strengthening Kubernetes environment security, from selecting proper base images to implementing runtime security and addressing post-release Day 2 exploits, ultimately ensuring both resilience and optimal performance.