![]() A container is really two different things. To understand container terminology, it’s important to understand exactly what a container is - with technical precision. If you need a primer, try starting with A Practical Introduction to Docker Containers on the Red Hat Developer Blog. Note, this technical dictionary assumes that the reader already has an understanding of how to run containers. As an industry and wider community, this deeper understanding will enable us to build new architectures and solutions. This will help you and your teams speak the same language and also provide insight into how to better architect your container environment for the goals you have. Understanding the terminology laid out in this technical dictionary will provide you a deeper understanding of the underlying technologies. Worse, many of the following terms are used interchangeably… often causing quite a bit of confusion for newcomers. Next, you begin the familiar process of architecting a production-like container environment, and have the epiphany that it’s necessary to understand a lot of terminology and technology behind the scenes. Within another few minutes, you are building your first container image and sharing it. It takes only a few minutes to install a container engine like docker and run your first commands. It is deceptively simple to get started with Linux Containers. Without a good handle on the terminology, It can be difficult to grasp the key differences between docker and (pick your favorites, CRI-O, rkt, lxc/lxd) or understand what the Open Container Initiative is doing to standardize container technology. Additionally, the landscape for container technologies is larger than just docker. In the world of containers, repository has a different meaning than what you'd expect. ![]() Terms like containers and images are used interchangeably, but there are important conceptual differences. You might think containers seem like a pretty straightforward concept, so why do I need to read about container terminology? In my work as a container technology evangelist, I've encountered misuse of container terminology that causes people to stumble on the road to mastering containers.
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