From Containers to Kubernetes

Limitations of containers

We quickly learned that a container image alone is only a fraction of what we need to run an application. Images contain processes that run inside containers. But processes alone hardly do what we need them to do. Containers don’t scale by themselves, they don’t enable external communication, and they don’t magically attach external volumes. Thinking that all we need is a command like docker container run is a misunderstanding, at best.