Wrapping a Monolith in Docker Isn't Containerization
TL;DR: docker build on a monolith and calling it "containerized" gets you a portable monolith, which still scales and fails as one block, and gains almost none of what containers actually offer. Real containerization pays off through five specific benefits: portability, independent scaling, self-healing, resource efficiency, and consistency, and most of them require splitting the app first. A…
Dockerizing a monolith does not truly provide the benefits of containerization, which include portability, independent scaling, self-healing, resource efficiency, and consistency. To gain these advantages, an application must first be split into services and then containerized. A food delivery platform reduced server costs by 41% and cut deployment time from 2 days to 20 minutes after containerizing after splitting into services.
The most common containerization mistake is treating a monolith as a container without first decomposing it into services. Once services are separated, containerization on Kubernetes helps with independent scaling, self-healing, resource efficiency, and consistency.
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