This white paper can help security operations teams and developers select approaches to secure container development and deployments on the Microsoft Azure platform. This paper describes containers, container deployment and management, and native platform services. It also describes runtime security issues that arise with the use of containers on the Azure platform. In figures and examples, it focuses on Docker as the container model and Kubernetes as the container orchestrator. Most of the security recommendations also apply to other container models from Microsoft partners on the Azure platform.