Containers, orchestration, cloud infrastructure, and the practices that keep production reliable.
How admission controllers intercept API requests before they're persisted, and how OPA/Gatekeeper turn that hook into cluster-wide policy enforcement.
How the OCI runtime and image specs standardized what a 'container' actually is, and how containerd/CRI-O/runc fit together beneath Docker and Kubernetes.
How Podman's daemon-less, fork-exec architecture differs from Docker's client-daemon model, and what that means for rootless containers in production.
A pod repeatedly crashes and restarts, sitting in CrashLoopBackOff. Here's a systematic way to find out why instead of just deleting and recreating the pod.
Docker builds and pulls start failing with ENOSPC, even though the host's regular disk usage doesn't look that high. Docker's own storage accumulates in places df alone won't clearly show you.
terraform plan or apply hangs, then fails with 'Error acquiring the state lock.' Here's how to confirm it's genuinely stale before force-unlocking it.
How Google's Site Reliability Engineering team (2003) and the DevOps movement (2009) emerged independently, from different motivations, and became closely linked practices.
Two complete, working deployment strategies for shipping a new version with minimal risk — instant-rollback blue-green, and gradual, traffic-controlled canary.
A complete, working GitHub Actions workflow that tests, builds, and deploys a containerized application on every push to main.
A complete, working setup for scaling a deployment automatically based on CPU usage, including the metrics-server prerequisite most tutorials skip over.