Containers
8 guides tagged “Containers”.
- Why Is Your Docker Image So Large (and How Do You Shrink It)? A 1.5 GB Docker image is usually build cruft, not your app. Learn the four causes and the fixes that routinely cut images by 80%.
- How to Debug a Crash-Looping Container A container that restarts every few seconds is crash-looping. Learn the systematic way to find why: check status, logs, entrypoint, and startup errors.
- Why Do My Containers Keep Getting Killed (OOMKilled)? OOMKilled means your container hit its memory limit and the kernel killed it. Learn why it happens, how to find the leak, and how to set limits safely.
- How to Write a Secure Dockerfile Write a secure Dockerfile: run as non-root, pin base images, use multi-stage builds, and never bake secrets in. A practical, copy-pasteable guide.
- Docker vs Podman: What's the Difference? Docker and Podman both build and run containers, but Podman is daemonless and rootless by default. Compare their CLI, security model, and trade-offs.
- How to Deploy Your First App to Kubernetes A step-by-step tutorial to deploy a containerized app to Kubernetes with a Deployment and Service, using minikube and kubectl.
- What Is a Container Registry (and How Do Rate Limits Work)? A container registry stores and serves your Docker images. Learn how registries work, why pulls fail with rate limits, and how to avoid them.
- What Is Kubernetes and Why Does My App Need It? Kubernetes schedules and runs containerized apps across many machines, handling scaling and self-healing. Learn what it does and when you don't need it.