Containers are typically stateless. However, for several applications, stateful compute resources are needed. Docker does not natively provide storage volume management or data persistence when porting these compute resources between hosts. The Flocker solution by ClusterHQ addresses these needs and enables the containers to be used for stateful applications, such as databases, by providing a framework for volume management and data persistence when moving compute resources from one host to another. Flocker works with all the major container managers (including Docker Swarm, Kubernetes, and Apache Mesos).