Explore best practices and pitfalls to avoid when running Open Source Databases on Kubernetes in this DevConf.CZ 2023 conference talk. Delve into the intricacies of managing stateful applications on Kubernetes, with a specific focus on databases. Learn about crucial aspects such as high availability, security, backups, and disaster recovery. Discover how to implement these practices using Percona Operators for MySQL, MongoDB, and PostgreSQL, a leading solution for Open Source Databases on Kubernetes. Gain insights on topics including automation, operators, performance optimization, troubleshooting, and reliability. The presentation also covers community involvement, acceptance tests, autotuning, buffer pool size, and data layer abstraction, providing a comprehensive overview of running databases efficiently in a Kubernetes environment.