quyennv.com

Senior DevOps Engineer · Healthcare, Fanance
— Detecting… —

Hi, I'm Quyen. This blog is where I share notes on DevOps, cloud, and tech.

Recent posts

CAP Theorem in System Design: Consistency, Availability, and Partition Tolerance

CAP theorem explained for distributed systems: the three guarantees (C, A, P), trade-offs (CA, CP, AP), partition examples, real-world use cases, and diagrams.

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Self-Hosted CI/CD Agent with AKS and Azure DevOps – Part 3: Kaniko in Detail

How Kaniko builds container images on Kubernetes without Docker. Job manifest, build context, ACR push, and pipeline integration with Azure DevOps.

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Istio Service Mesh: Traffic, Resiliency, Observability, and Security

Introduction to Istio: control plane and data plane, sidecar vs ambient mesh modes (with examples), traffic control, resiliency, observability, and security.

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Context Engineering for AI Agents: Summary and Deep Dive

A detailed, practical guide to context engineering for AI agents: context budgets, prompt vs context engineering, tool/context curation, just-in-time retrieval, and long-horizon strategies (compaction, structured notes, multi-agent).

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Building a Lightweight Windows System Monitor Widget in C++

Step-by-step walkthrough of the SysMonitor widget: architecture, windowing model, metric collectors, rendering pipeline, tray integration, and ideas for extending it.

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Designing Data‑Intensive Applications – Detailed Summary and Notes

Easy‑to‑understand summary of Martin Kleppmann’s Designing Data‑Intensive Applications (DDIA): reliability, scalability, maintainability, data models, storage, distributed systems, batch and stream processing.

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Kubernetes PV, PVC, and How They Attach to Pods (Deployments, StatefulSets, DaemonSets)

PersistentVolume vs PersistentVolumeClaim, StorageClass, binding lifecycle, access modes, and how each workload type (Deployment, StatefulSet, DaemonSet) uses volumes with Pods.

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Thinking in Systems: A Primer

Key ideas from Donella Meadows' Thinking in Systems—stocks and flows, feedback loops, the systems zoo, why systems surprise us, system traps, leverage points, and living in a world of systems.

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AI Agentic Systems and Model Context Protocol (MCP): Architecture, Workflows, and Examples

Architecture and workflows for agentic AI (ReAct, plan-and-execute) and the Model Context Protocol for tools, resources, and context exchange, with diagrams and examples.

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Coordinating Vulnerability Disclosure (CVD): Protocol, Process, and Examples

What CVD is, why it matters, the end-to-end process, how to follow it, and real-world examples for security researchers and vendors.

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Tutorial: Automate Azure Flexible PostgreSQL Backup and Ship to Storage Account

Back up Azure Flexible PostgreSQL databases across multiple regions and upload backups to Azure Blob Storage using an Azure DevOps pipeline.

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Self-Hosted CI/CD Agent with AKS and Azure DevOps – Part 2

How to run a self-hosted CI/CD agent on AKS/EKS with Azure DevOps. Prepare the Kaniko repo, start script, and clean up offline agents.

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Logging Architecture: Application, Log Sidecar, and Log Daemon

Full architecture for centralized logging: app pods, log sidecar pattern, node-level log daemon (DaemonSet), with Kubernetes examples and trade-offs.

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Implementing a Rollback Strategy

Rolling back vs rolling forward for databases and deployments: when to use each, how they differ, and why backup/restore still comes first.

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About this site

quyennv.com is my personal technology blog, notes for: DevOps, cloud (AWS, Azure), Kubernetes, CI/CD, and tutorials.

About me · All posts