@cjd Although running Docker inside Docker is generally not recommended, there are some legitimate use cases, such as development of Docker itself.
Before running Docker-in-Docker, be sure to read through Jérôme Petazzoni's excellent blog post on the subject, where he outlines some of the pros and cons of doing so (and some nasty gotchas you might run into).
@cjd Although running Docker inside Docker is generally not recommended, there are some legitimate use cases, such as development of Docker itself.
Before running Docker-in-Docker, be sure to read through Jérôme Petazzoni's excellent blog post on the subject, where he outlines some of the pros and cons of doing so (and some nasty gotchas you might run into).
https://jpetazzo.github.io/2015/09/03/do-not-use-docker-in-docker-for-ci/