Architecture, real systems, product decisions and technical lessons. Everything reviewed with my own judgment before it ships.
240 articles published
HEALTHCHECK in Docker runs a specific command and looks at its exit code. It doesn't know if the database responds, or if an external dependency is down. That difference matters when a container stays "healthy" while the app is broken inside.
Oct 06 2026 · 4′ · Tutorials · docker · devops
depends_on without a condition only waits for the container to exist, not for the app inside it to respond. Only with condition: service_healthy in Docker Compose do you get a real guarantee of ordered startup.
Sep 09 2026 · 6′ · Tutorials · docker · devops
Docker's HEALTHCHECK is information, not a routing guarantee. If Kubernetes or Swarm isn't reading it, your container can be "healthy" and still keep taking requests that are going to fail.
Aug 28 2026 · 7′ · Tutorials · docker · devops
Why a HEALTHCHECK copied from a tutorial usually lies more than having none at all, and how to decide between Dockerfile, Compose, and the orchestrator based on what you actually need to monitor.
Aug 04 2026 · 9′ · Tutorials · docker · devops
There's no universal winner. Barman wins on simplicity and real-time WAL streaming with low operational overhead. pgBackRest wins on volume and restore speed. The criteria matter more than the tool.
Jul 13 2026 · 9′ · Tutorials · devops · produccion
Adding an npm dependency isn't just installing code — it's taking on its maintenance, its attack surface, and its transitive deps. Here's the checklist I run before adding any package to a serious TypeScript project.
Jun 22 2026 · 9′ · Tutorials · TypeScript · pnpm
pnpm workspaces is the best option for TypeScript monorepos in 2026. But the happy path in the docs hides three traps that only show up in CI with real deployments: phantom dependencies, broken hoisting on Railway, and script filtering that doesn't filter what you think it does.
Jun 19 2026 · 9′ · Tutorials · TypeScript · pnpm
Actuator isn't the problem. Enabling it without a clear exposure policy is. A practical guide to using it as an operational tool without turning it into unnecessary public attack surface.
Jun 17 2026 · 8′ · Tutorials · devops · backend
Kubernetes technical interviews have a problem nobody names: they ask about objects you'll never touch in production, while ignoring the mistakes that actually break real systems. Here's the map I was missing.
Jun 16 2026 · 9′ · Tutorials · docker · devops