Containers
24 guides tagged “Containers”.
- What Is Agent Isolation (and Why Containers Aren't Enough)? Isolation bounds what a run can reach: files, network, credentials, and the host. A container without those controls is mostly packaging.
- What Is a Build Artifact (and Why Does Yours Keep Breaking)? A build artifact is the immutable output of a build, identified by a digest. Passing it between stages stops environments from diverging.
- ImagePullBackOff: What It Means and How to Fix It ImagePullBackOff means Kubernetes cannot download your container image. Learn the causes — bad tag, auth, rate limit, network — and how to diagnose each.
- Kubernetes Security for AI Builders: Hardening the Cluster Your Assistant Configured A default cluster trusts everything inside it. Learn RBAC, network policies, pod security, Secrets, and image hardening — the Kubernetes security work your AI's manifests skip.
- k3s for Vibecoders: Kubernetes on One Cheap Server, Without the Cloud Bill k3s is real Kubernetes in a single binary that runs on a $6 VPS. Learn what it bundles, how to deploy your AI-built app to it, and when a managed cluster is still the better call.
- Kubernetes for AI Builders: Run What Your Assistant Generates Without Wrecking Production Your AI writes Kubernetes manifests it doesn't understand. Learn the objects, the failure modes, the cost traps, and the security gaps — with every linked guide.
- 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%.
- ARM vs x86: Why Your Laptop, Your Server, and Your Cloud Disagree Apple Silicon, AWS Graviton, and Ampere made ARM servers real. Learn what changes when your binary no longer matches your host, and when ARM saves money.
- Kubernetes vs k3s: Which Should You Run for an AI-Built App? Kubernetes and k3s run the same manifests. The difference is packaging, operations, and cost. A decision guide for small apps and solo builders.
- What Is k3s (and When Should You Use It)? k3s is certified Kubernetes in a single binary: same API, bundled ingress and storage, and small enough to run on one cheap server. What it is and when to use it.
- 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.
- The Kubernetes Security Checklist for AI-Built Clusters A default cluster trusts everything inside it. Work through the identity, network, workload, secrets, and image checks your AI's manifests left at their permissive defaults.
- Kubernetes Pod Security: Why Your AI's Container Runs as Root Generated manifests leave containers running as root with default capabilities and a writable filesystem. Pod security settings close that gap, starting with securityContext.
- 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.
- Kubernetes Requests vs Limits: Why Your Pod Gets OOMKilled Resource requests tell the scheduler what to reserve; limits tell the runtime when to throttle or kill. Setting them wrong causes OOMKills, throttling, and eviction.
- Kubernetes Deployment vs StatefulSet: Which Does Your Service Need? Deployments treat pods as interchangeable; StatefulSets give each pod a stable identity and its own storage. Choosing wrong for a database loses data.
- 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.
- Kubernetes YAML Explained: Deployments, Services, and What Your AI Writes Kubernetes manifests are four fields deep and highly repetitive. Learn the parts of a Deployment and Service that matter, and how to read the YAML your AI generates.
- Why Does My Container Keep Restarting Every 30 Seconds? A restart loop has three usual causes: the process exits, a health check fails, or the runtime kills it. Read the exit code to tell them apart.
- Kubernetes vs Docker Compose: When Should You Graduate? Docker Compose runs containers on one machine; Kubernetes runs them across many. A practical comparison of when each is enough, and the concrete signs you have outgrown Compose.
- 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.