Docker for Windows supports running mixed (Linux+Windows) Docker images, see https://devblogs.microsoft.com/premier-developer/mixing-windows-and-linux-containers-with-docker-compose/ but GitLab Runner does not allow that due https://gitlab.com/gitlab-org/gitlab-runner/commit/f1ce81ca96645ff339338df5dfb54c87e709bb50 . ## Steps to reproduce Start any Windows job with some Linux service. ## Actual behavior ``` Running with gitlab-runner 11.11.2 (ac2a293c) on ...removed... ERROR: Job failed: executor requires OSType=linux, but Docker Engine supports only OSType=windows ``` ## Expected behavior Linux service/image is started on Windows host.