Red Hat has woken up to the growth of Linux containers – cough, cough, Docker – and has begun certifying applications running in the sandboxing tech. The Red Hat Container Certification program was announced on Tuesday, and essentially checks that a piece of software can be executed safely and securely in a container on Red Hat' …
So, is this a chroot'ed environment, or something else?
Something more. Linux containers ( http://en.wikipedia.org/wiki/LXC ) and some technology to do packing of what you want in the container ( http://en.wikipedia.org/wiki/Docker_(software) )
In a nutshell, a Docker container contains an application *and* all of its dependencies. So say the application depends on a LAMP stack with specific versions of Apache, MySQL and PHP, you wrap those versions into the container. You can then move that container to any VM or physical server without worrying what the AMP versions are on the base install of the VM.
This is a huge step. Currently if you want to move an application from one VM to another, or you want to run mirror servers, you first have to build a second VM to the same specification as the original in terms of application dependencies. Even with things like chef and puppet this can be a time consuming task. Linux containers abstract away that problem without (so it is claimed) a significant performance overhead.
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