Inside the Docker Image Build Process
Hi Everyone I saw this interesting article on LinkedIn regarding the Docker Build process (the animated picture shows the process When you run: docker build -t myapp:v1 . it’s not just “magic” three main players are working together: 1️⃣ Docker Client This is the CLI you type into (docker build, docker push, etc.). The client doesn’t build the image itself, it sends API requests to the Docker Daemon running on the host. 2️⃣ Docker Host (Docker Daemon) The host is where the actual work happens. It parses your Dockerfile line by line. Each instruction (FROM, RUN, COPY, etc.) creates an image layer. Layers are cached so unchanged steps don’t rebuild unnecessarily. The final image is stored locally on the host’s image store. 3️⃣ Docker Hub (Registry) Your image lives on your local host until you push it to a registry like Docker Hub. docker push uploads layers that don’t already exist in the registry. Once in the hub, your image can be pulled to any environment (test, staging, production). 📌 Flow Recap: Client → sends command → Host builds & stores image → optional push to Hub for sharing & deployment. This workflow is why Docker makes apps portable; your environment, dependencies, and code are all bundled into a consistent image. Reference: https://www.linkedin.com/feed/update/urn:li:activity:7417411236079955969/?utm_source=share&utm_medium=member_ios&rcm=ACoAAAQDlFoBeeiykU7LSX-TEvWzCQ_zsml5fcs