Technical guide
Validate JSON in Node.js with Ajv
Compile reusable JSON Schema validators with Ajv, validate formats, define custom keywords, and return useful errors without hiding schema problems.
Technical guide
Get started with Ansible automation
Build an inventory, check connectivity, and deploy a small Nginx site with a playbook and explicit platform requirements.
Technical guide
Build and validate an Ansible inventory
Organize hosts and groups, select targets with patterns, and inspect effective variables before running a playbook.
Technical guide
Edit individual configuration lines with Ansible
Use lineinfile for targeted changes, understand match and insertion behavior, and validate sensitive configuration before reloading.
Technical guide
Render configuration files with Ansible templates
Use Jinja2 variables, conditions, and loops, then validate generated configuration and protect rendered secrets.
Technical guide
AnyIO for Python: task groups, cancellation, and timeouts
Use AnyIO across asyncio and Trio, manage child tasks with task groups, handle exception groups, and set cooperative timeout and cleanup boundaries.
Technical guide
Apache logging: access formats, error logs, and safe structured output
Find Apache logs, decode Common and Combined records, add timing, avoid unsafe JSON templates, and validate collection and HTTP status fields in Guance.
Technical guide
Schedule Python tasks with APScheduler 3.x
Choose triggers and scheduler types, persist job definitions, and handle missed runs and single-process coordination in APScheduler 3.x.
Technical guide
Get started with Artillery load testing
Model virtual-user arrivals, build data-driven request flows, and connect latency thresholds to server-side evidence.
Technical guide
Manage runtime versions with asdf
Install asdf, add language plugins, and use .tool-versions with explicit installation and legacy-file requirements.
Technical guide
Authentication and authorization in FastAPI
Build FastAPI credential checks with HTTP Basic, password hashes, validated Bearer JWTs, user lookup, and role dependencies, with clear production boundaries.
Technical guide
Get started with AVA unit tests
Set up AVA, select tests, handle async assertions, and avoid confusing file isolation with isolation between concurrent tests.