ITNotes - Page 10 of 142 - From Terminal to Cloud

Kubernetes Network Policies with Cilium: eBPF Microsegmentation Guide

October 9, 2026

Secure your Kubernetes clusters with Cilium Network Policies powered by eBPF. Learn how to set up zero-trust default-deny rules, L7 HTTP filtering, and live Hubble drop tracing.

Security

Deploy Authentik on Docker: Self-Hosted Identity Provider with SSO, MFA, and User Provisioning

October 9, 2026

Learn how to deploy Authentik on Docker Compose to build a robust, self-hosted Identity Provider. This guide covers step-by-step setup, OIDC and SAML app integration, dynamic MFA policies, and LDAP outpost configuration.

Build a Lightweight Graph-Based RAG System with LightRAG and Python

October 9, 2026

Standard vector RAG fails when queries require multi-hop reasoning across docs, while enterprise GraphRAG setups run up massive token bills. Learn how to build a lean, dual-level Graph RAG pipeline in Python with LightRAG.

DevOps

Deploying Cilium CNI on Kubernetes: Replace Kube-Proxy with eBPF in Production

October 9, 2026

Learn how replacing kube-proxy with Cilium CNI and eBPF eliminates iptables bottlenecks, cutting p99 latency from 240ms to 6ms in production Kubernetes clusters.

Database

Mastering pgAudit in PostgreSQL: Production Audit Logging and Security Monitoring Guide

October 9, 2026

Learn how to configure pgAudit in PostgreSQL for production audit logging and compliance monitoring. Discover object-level auditing to track sensitive queries with minimal performance overhead.

Deploy SGLang with Docker on Linux: Faster LLM Inference Using RadixAttention

October 8, 2026

SGLang uses RadixAttention to cache shared prefixes across requests — making it significantly faster than vLLM for chatbots, agents, and RAG pipelines. This guide covers deploying SGLang with Docker on Linux: from GPU toolkit setup to a production-ready Docker Compose configuration.

Database

MongoDB Aggregation Pipeline: Process, Group, and Transform Complex Data

October 8, 2026

After six months running MongoDB's aggregation pipeline across two production deployments, here's an honest comparison of approaches, real performance numbers, and practical code examples covering grouping, array unwinding, joins, and time-based reporting — from basic stages to full Python integration.

Linux

Mastering Nftables on Linux: Modern Firewall Configuration to Replace Iptables

October 8, 2026

After six months running nftables across 12 production VPS instances, the migration from iptables turned out to be the best firewall decision I've made. This guide covers the real problems with iptables, how nftables solves them, and a practical migration process with a rollback safety net.

Database

Redis Streams: Consumer Groups, XADD, XREADGROUP and Dead Letter Queue Best Practices

October 8, 2026

Redis Streams give you a persistent message queue with consumer groups, delivery guarantees, and dead letter queue support — all without leaving your existing Redis setup. This guide walks through XADD, XREADGROUP, consumer group configuration, and a practical reaper pattern for handling failed messages.

Database

Using pg_repack to Fix Table and Index Bloat in PostgreSQL Without Locking Tables

October 8, 2026

PostgreSQL's MVCC model creates dead tuples over time, causing table and index bloat that slows queries and wastes disk space. This guide covers how to use pg_repack to reclaim that space in production with zero table locks — including installation, usage patterns, and ongoing monitoring.

Mitigate DDoS with BGP Flowspec and ExaBGP on Linux: Automated Routing-Level Packet Filtering

Deploy Harbor on Docker: Self-Host a Secure Private Container Registry with Trivy and Image Signing for Your HomeLab

Building a Production-Ready Text-to-SQL Engine with Vanna.ai and Python

Deploy CrowdSec on Linux: Building a Distributed IPS to Block Brute Force and Web Attacks

Route-Based IPsec VPN with strongSwan and VTI on Linux: Secure Cloud-to-On-Premises Connectivity

Automate Kubernetes Troubleshooting with K8sGPT and Local Ollama

Mastering Outlines in Python: Guaranteed Structured LLM Output with Regex and CFGs

Mastering Cursor Rules and Context Mentions: Standardize Architecture Across Your Dev Team

Deploying HashiCorp Vault on Kubernetes: Dynamic Secrets and Sidecar Injector Guide

Deploying WPA3-Enterprise with FreeRADIUS and EAP-TLS: Mutual PKI Authentication Guide

Kubernetes Network Policies with Cilium: eBPF Microsegmentation Guide

Deploy Authentik on Docker: Self-Hosted Identity Provider with SSO, MFA, and User Provisioning

Build a Lightweight Graph-Based RAG System with LightRAG and Python

Deploying Cilium CNI on Kubernetes: Replace Kube-Proxy with eBPF in Production

Mastering pgAudit in PostgreSQL: Production Audit Logging and Security Monitoring Guide

Deploy SGLang with Docker on Linux: Faster LLM Inference Using RadixAttention

MongoDB Aggregation Pipeline: Process, Group, and Transform Complex Data

Mastering Nftables on Linux: Modern Firewall Configuration to Replace Iptables

Redis Streams: Consumer Groups, XADD, XREADGROUP and Dead Letter Queue Best Practices

Using pg_repack to Fix Table and Index Bloat in PostgreSQL Without Locking Tables