ITNotes - Page 57 of 84 - From Terminal to Cloud

Deploy Keycloak on Docker: Build a Centralized IAM and SSO System for Your Apps

April 9, 2026

Running auth logic in every application separately creates security gaps, duplicated code, and user frustration. This guide walks through deploying Keycloak on Docker with PostgreSQL to build a centralized IAM and SSO system — one login, consistent security policies, and MFA across all your apps.

DevOps

Testing Infrastructure as Code with Terratest: A Production-Ready Guide

April 9, 2026

Stop relying on 'terraform plan'. Learn how to use Terratest to provision real resources, verify their state, and automate your IaC testing in production pipelines.

DevOps

Managing Git Secrets Safely with Mozilla SOPS and Age: A Lightweight HashiCorp Vault Alternative

April 9, 2026

Mozilla SOPS combined with Age lets you store encrypted secrets directly in Git — version-controlled and diff-able — without running a secrets management server. This guide covers installation, team setup, CI/CD integration, and key rotation for a lightweight alternative to HashiCorp Vault.

Networking

Keepalived & VRRP: Build a Floating IP for High Availability on Linux

April 9, 2026

Keepalived implements VRRP on Linux to give your servers a shared floating IP address. When the primary node fails, the standby automatically claims the VIP in seconds. This step-by-step guide covers installation, configuration, health check scripts, and failover testing on Ubuntu/Debian.

Programming

Beyond REST: Building High-Performance gRPC APIs with Go and Python

April 8, 2026

Is JSON parsing slowing down your microservices? Learn how to implement high-performance gRPC APIs using Go and Python to slash latency and CPU usage.

From Chatbots to Agents: A Practical Guide to Function Calling with OpenAI and Claude

April 8, 2026

Bridge the knowledge gap between LLMs and the real world. This guide covers how to implement Function Calling in OpenAI and Claude using Python to build reliable AI agents.

HomeLab

Deploy Immich on Docker: Self-Hosted Photo and Video Backup for Your HomeLab

April 8, 2026

Tired of paying for Google Photos storage or worrying about your memories sitting on someone else's server? Immich is a self-hosted photo and video backup solution that runs on Docker and gives you full control. This guide walks through the complete setup from docker-compose deployment to mobile auto-backup and Google Photos migration.

Networking

Setting Up a Squid Proxy Server on Linux: Access Control, Content Filtering, and Bandwidth Caching

April 8, 2026

Squid proxy server gives you fine-grained control over your network's outbound traffic — access control by IP or user, content filtering via domain blocklists, and HTTP caching to reduce bandwidth costs. This guide walks through a complete production-ready setup on Linux.

Programming

Building Professional CLI Tools with Python Click and Rich: From Simple Script to Polished Command-Line App

April 8, 2026

Learn how to build professional Python CLI tools using Click and Rich by comparing approaches, understanding trade-offs, and following a hands-on implementation guide. From decorator-based commands to Rich tables and progress bars, this tutorial covers everything you need to turn a Python script into a tool your team will actually use.

Programming

Clean Architecture in Go: Build Maintainable and Scalable Go Applications

April 8, 2026

Clean Architecture in Go enforces strict dependency rules that keep business logic isolated from databases and HTTP frameworks. This guide walks through a practical Go project structure with real code examples showing how to write fast, testable, and maintainable services.

Building a Laravel REST API with Docker: From Zero to Production in 2024

Mastering Prometheus Alertmanager: Routing, Grouping, Inhibition, and Smart Alert Delivery to Telegram and PagerDuty

Securing IoT Devices at Home and in Your HomeLab: VLAN Segmentation, Firmware Monitoring, and Blocking Suspicious Connections

Mastering Protocol Buffers: Schema-first API Design for Multi-language Projects

Deploy FerretDB on Docker: MongoDB-Compatible Open Source Database Built on PostgreSQL

Practical Web Security: Hunting XSS, SQLi, and IDOR with Burp Suite Community

Deploy OpenCTI on Docker: Build Your Own Threat Intelligence Lab

Beyond Boolean Soup: Architecting Robust React Logic with XState

Why Is My Linux Load Average High Despite Low CPU Usage?

Beyond APT: A Field Guide to Snap, Flatpak, and AppImage

Deploy Keycloak on Docker: Build a Centralized IAM and SSO System for Your Apps

Testing Infrastructure as Code with Terratest: A Production-Ready Guide

Managing Git Secrets Safely with Mozilla SOPS and Age: A Lightweight HashiCorp Vault Alternative

Keepalived & VRRP: Build a Floating IP for High Availability on Linux

Beyond REST: Building High-Performance gRPC APIs with Go and Python

From Chatbots to Agents: A Practical Guide to Function Calling with OpenAI and Claude

Deploy Immich on Docker: Self-Hosted Photo and Video Backup for Your HomeLab

Setting Up a Squid Proxy Server on Linux: Access Control, Content Filtering, and Bandwidth Caching

Building Professional CLI Tools with Python Click and Rich: From Simple Script to Polished Command-Line App

Clean Architecture in Go: Build Maintainable and Scalable Go Applications