Painless Docker - 2nd Edition

Secure by Design and DevSecOps

Building a secure containerized environment requires a Defense in Depth strategy. Security is not a single barrier, but a series of overlapping layers. In this model, the application, the container, the host, and the cloud infrastructure are all interconnected parts of the same running stack. Any one of these elements could be the "weakest link" that an attacker exploits to gain a foothold.

Shifting Left: Security is Not an Afterthought

A frequent mistake in software development is treating security as a final "check-off" step before production. This reactive approach is often too little, too late. Instead, modern teams adopt the "Shift Left" philosophy, integrating security into the development process from the very first line of code.

This integration is achieved through DevSecOps, where security measures are automated directly into the CI/CD (Continuous Integration/Continuous Deployment) pipeline.

Interested in learning more about the tools, techniques and processes to operationalize DevSecOps at scale? Don't forget to check out my course DevSecOps in Practice. Throughout this course, you'll discover how to effectively weave security into every stage of your software development lifecycle, using proven DevSecOps practices and powerful tools.

To prevent a single point of failure, security must be addressed at every level: