Is there any way for Openshift to respect Docker ENV variables

I am working with a Docker notary to verify the trust of the images used, but now I want to use this feature inside Openshift. In theory, Openshift uses Docker Client, so if you set the environment variable DOCKER_CONTENT_TRUST = 1, it assumes just use images from trusted sources.
I set the variable deflection / etc / environment or even with export but no luck at all.
Does anyone know if this is possible? Does Openshift expose custom settings from Docker Client?
Thanks in advance for your help