ITNotes - From Terminal to Cloud

Deploy Unleash on Docker: Self-Host Feature Flags for Zero-Downtime Feature Control and A/B Testing

July 21, 2026

Learn how to self-host Unleash on Docker to implement feature flags and A/B testing without redeploying your production apps. This guide covers a 5-minute quick start, SDK integration in Python and Node.js, gradual rollouts, variant-based A/B testing, and production hardening tips — written from real incident experience.

Programming

Building a REST API with Axum and Rust: Type-Safe Services, SQLx Database Integration, and Docker Deployment

July 21, 2026

Learn to build a type-safe REST API with Axum and Rust, including SQLx compile-time SQL verification, proper error handling, and a multi-stage Docker deployment that produces minimal production images. Tips from real-world experience building and maintaining Rust services.

Build an AI Data Analyst with PandasAI and Python: Query CSV/Excel Data Using Natural Language

July 21, 2026

PandasAI wraps an LLM around any pandas DataFrame, letting you query CSV and Excel files in plain English and generate charts without writing a single line of pandas. This guide walks through the full setup — from installation to production-ready configuration — with practical code examples.

Database

Beyond OFFSET: Why Cursor-Based Pagination is the Only Way to Scale APIs

July 21, 2026

Is your API slowing down as your database grows? Discover why OFFSET is a performance killer and how to implement O(1) cursor-based pagination for massive datasets.

DevOps

Kubernetes Smart Alerting: Using Robusta to Automate Diagnostics and Slash MTTR

July 21, 2026

Slash your Kubernetes MTTR by automating alert enrichment. This guide explains how to use Robusta to turn vague notifications into diagnostic reports with logs and one-click remediation.

Database

PostgreSQL Job Queue with SKIP LOCKED and Advisory Locks: Background Tasks Without Redis or RabbitMQ

July 20, 2026

Learn how to build a reliable background job queue using PostgreSQL's SKIP LOCKED and Advisory Locks — no Redis or RabbitMQ required. Covers worker implementation in Python, retry logic with exponential backoff, per-resource locking, and queue monitoring using plain SQL.

Build a Personal AI Knowledge Base with Obsidian, Ollama and ChromaDB: Offline Semantic Search for Your Notes

July 20, 2026

Keyword search fails when you need it most — 2 AM, 600 notes, and the answer is in there somewhere with a title you don't remember. This guide builds a fully offline personal AI knowledge base using Obsidian, Ollama, and ChromaDB so you can search your notes by meaning, not by exact wording, with no cloud dependency.

DevOps

Kube-green: Automatically Suspend Kubernetes Workloads After Hours to Cut Dev/Staging Cloud Costs

July 20, 2026

After watching a $847/month dev cluster bill for workloads idle 65% of the time, I set up kube-green — a Kubernetes operator that suspends Deployments and StatefulSets outside working hours. Six months later, monthly costs dropped to $290 with zero operational issues.

Programming

Mastering Zod in TypeScript: Schema Validation, Type Inference, and React Hook Form Integration

July 20, 2026

Zod fills the gap TypeScript can't close: runtime validation that stays in sync with your types automatically. This guide covers schema definition, type inference, React Hook Form integration, and sharing schemas across a full-stack TypeScript project.

Database

Stop Writing CRUD: Build a REST API Directly from PostgreSQL with PostgREST

July 20, 2026

Stop writing repetitive backend code. Learn how to use PostgREST to transform your PostgreSQL schema into a high-performance, secure REST API in minutes.