February 27, 2026

If you’ve been working with Docker for a bit, you’ve probably been pulling existing images and running containers off them. That works fine until it doesn’t...

If you’re getting into DevOps or just trying to wrap your head around modern application deployment, Docker is one of those things you simply cannot afford...

Containerization is a form of virtualization that runs applications in isolated user spaces known as containers. Notably, all these containers share the same underlying operating system. The container engine, pivotal in containerization technologies and container orchestration platforms, serves as the container runtime environment. It effectively manages the creation, deployment, and execution of containers. Now let’s explore the magic of containerization. Imagine a container as a fully packaged and portable computing environment. It’s like a digital suitcase that holds everything an application needs to run —binaries, libraries, configuration files, dependencies —you name it. And the best part is that it’s all encapsulated and isolated within a container. In olden days, running an application meant matching it with your machine’s operating system. For example, Windows software requires a Windows machine. However, containerization has rewritten this narrative. Now, it’s ancient history. With containerization, you create a single software package, a container that gracefully runs on any device or operating system. What’s fascinating is that these containers seamlessly run while sharing the host operating system. Now here’s the tricky part. The container engine is like a shadow abstracted from the host operating system with limited access to underlying resources. Think of it as a super lightweight virtual machine. The beauty...

Microservices architecture is a better approach than the monolith approach to application development. The question is, how do you pull it off? One extremely beneficial method is the 12-factor app methodology. It was created by developers at Heroku back in 2011. So let’s get started. The 12-factor methodology is a set of 12 best practices for developing applications to run as services. The 12-factor app...