James Walker

Docker’s concept of the “build context” is one of its most restrictive and misunderstood characteristics. The build context defines the local files and folders you can reference in your Dockerfile. Content outside it cannot b…

Software supply chain security has become topical in the wake of high profile dependency-based attacks. Producing an SBOM for your software artifacts can help you identify weaknesses and trim down the number of packages you r…

Watchtower solves the common problem of how to update running Docker containers when a new image releases. Watchtower automatically “watches” your containers, periodically polls for new versions of their images, and restarts …

Led by Docker, software containers have been one of the most transformational development technologies to emerge over the past decade. While their technical merits are now widely acknowledged, the business benefits of contain…

GPU access in Docker lets you containerize demanding workloads such as machine learning applications. GPUs aren’t automatically available when you start a new container but they can be activated with the –gpus flag for docke…

Docker images are created by building Dockerfiles. The build process executes the instructions in the Dockerfile to create the filesystem layers that form the final image.

After almost a year in beta, Docker Compose v2 is generally available as the container management tool’s stable release. Most users should be able to make the switch today. In this guide, we’ll show you how to prepare and ap…

This isn’t always good enough though. Some of your containers might have dependencies on each other that break the application if they can’t be fulfilled. In this guide, we’ll show how you can configure your Compose services …

Using the Docker CLI to list and inspect the resources on your system often produces verbose output that can hide important details. Docker supports Go’s templating syntax in conjunction with the –format flag to give you con…

A fresh Docker installation defaults to public interactions with Docker Hub. Logging in lets you access your private content and benefit from less restrictive Docker API rate limits.

COPY –link is a new BuildKit feature which could substantially accelerate your Docker image builds. It works by copying files into independent image layers that don’t rely on the presence of their predecessors. You can add n…