Well Microsoft did hire one of the Kubernetes Founders last year (http://www.crn.com/news/cloud/300081316/microsoft-hires-googles-lead-kubernetes-engineer-to-bo

Well Microsoft did hire one of the Kubernetes Founders last year (http://www.crn.com/news/cloud/300081316/microsoft-hires-googles-lead-kubernetes-engineer-to-boost-container-orchestration-support-in-azure.htm http://www.crn.com/news/cloud/300081316/microsoft-hires-goog...) and have been working on getting Kubernetes running on Azure, so it doesn't surprise me that they'd want to strengthen that effort.