Everyone knows that in the early days of the Docker platform's existence, more emphasis was placed on the Dev side of the DevOps equation. Effectively, that meant that Docker provided a good experience for developing software applications, but a sub-optimal »
The overlay filesystem (formally known as overlayfs) was merged into the mainline Linux kernel at version 3.18 in December 2014. Whilst other, similar union mount filesystems have been around for many years (notably, aufs), overlay is the first to »
For those unfamiliar with Docker, it's a platform for creating and running isolated workloads in containers based on a template image. The image repositories are stored in registries, which are retrieved using a fully qualified image name (FQIN) as part »
Docker images are the templates that derive the nature and behaviour of a container, and Docker stores these images in repositories on hosted registries. An official registry, called the Docker Hub Registry, is hosted by Docker Inc., which contains: A »
Containers created and managed by the Docker platform, are able to provide the service that is running inside the container, not only to other co-located containers, but also to remote hosts. Docker achieves this with port forwarding. For a brief »