Product : Citrix, XenServer/7.3, Enterprise
Feature : Container Support, Interoperability, Hypervisor
Content Owner:  Roman Macek
Summary
Yes
Details
Docker support for XenServer is a feature of XenServer 6.5 SP1 or later and is delivered as a supplimental pack named "xs-container" which also includes support for CoreOS and cloud-drives.

More info: http://bit.ly/2mM2vde