The Ubuntu Openstack ecosystem is growing fast. This is good news. But as the options in cloud building grow, so does the task of ensuring interoperability between all the components. At Canonical we have deep experience of conformity and interoperability testing between OpenStack and Ubuntu. To bring this to the wider ecosystem we’ve opened a lab dedicated to testing components’ interoperability. We want to be able to present a wide a range of validated and supportable technical solutions. The talk will present the OIL describe how and why Canonical creates it and how to benefit from it.