VMware has announced that it now supports CoreOS on both vSphere 5.5. and vCloud Air. CoreOS is a Linux distribution designed to provide minimal functionality required for deploying applications inside software containers like Docker. VMware has been working with the CoreOS team in order to provide open-vm-tools and by providing the CoreOS OS in OVA format for use in vSphere.
Supported CoreOS releases begin with 557.x release and will extend to future stable releases. VMware is currently working on extending the support for CoreOS to vSphere 6 as well.