What Is Containerization? Containers Explained
Containerization packages your app with its dependencies so it runs identically anywhere. Here's how it relates to OpenClaw deployments.
Containerization is a method of packaging an application along with its dependencies, libraries, and runtime into a single, portable unit. Unlike virtual machines, containers share the host OS kernel, making them lightweight and fast to start.
Why Containers Matter for OpenClaw
When you deploy with OpenClaw, your application runs inside a container on Fly.io. The Dockerfile (or auto-detected runtime) defines this package. OpenClaw streamlines this — you don't write Dockerfile configs from scratch, but the concepts apply.
Docker and OCI Images
Docker popularized containerization. The Open Container Initiative (OCI) defines standard image formats, so containers built with Docker run on any OCI-compliant runtime — Podman, containerd, Fly's own firecracker VMs.
Best Practices
Keep images small (use Alpine-based images or distroless), run as non-root, and pin dependency versions. OpenClaw handles most of this automatically but respects your Dockerfile if you provide one.