CoreOS has raised $28m in a second round of financing led by its most strategic supporter Google – money which will help it compete against Docker to be the dominant platform for containerizing Linux applications. The use of containers is rising rapidly in the enterprise market and CoreOS, which uses Google’s Chrome code base, is an alternative to the most common engine, Docker, and others like Joyent. Originally, CoreOS created a lightweight open source Linux distribution which supported Docker containers, but as it gained ground – and Google support – it created a rival engine, rkt, which claims superior security functionality to Docker’s, and a growing range of associated tools. rkt is the basis of its Tectonic container deployment solution.…