Metrics tell you that something is wrong. Traces tell you where. Logs tell you why. Use them in that order and each step narrows the search — start with logs and you are grepping a firehose. Here is what each one is actually for, and the field that connects all three.
Put a CDN in front of a dynamic site carelessly and it will cache one user's personalised page and serve it to everyone — invisibly, because your logged-in browser looks fine. Here is how to classify routes, set cache headers that hold, and run the two curl commands that catch the leak.
The top search result tells you to run docker system prune -a --volumes. It frees the space and deletes your database. Here is how to measure Docker disk usage properly, reclaim it from safest to most destructive, and fix the logs that Docker never reports on.
A fresh AWS account ships wide open by default. Here are the seven decisions that make one defensible from the start — OIDC instead of static keys, encrypted state, an isolated database tier, free gateway endpoints — with a working Terraform reference implementation on GitHub.
Two static binaries, a package and four systemd units. How to install Prometheus and Grafana on a single server from scratch, wire in node_exporter, put nginx and TLS in front, and keep the ports that have no authentication off the public internet.
The licence changed, the community forked, IBM bought HashiCorp, CDKTF was archived, and Pulumi started speaking HCL. Here is an honest read of where Pulumi vs Terraform actually stands in 2026, and how to pick a lane you will not regret.
Docker containers rarely fail without leaving clues. This practical guide explores common Docker issues involving networking, storage, permissions, ports, logs, health checks, reverse proxies, and resource usage—and explains how to troubleshoot them methodically.