Technical writing
Architecture decisions, production incidents and implementation strategies. Not tutorials — documented engineering work.
Kubernetes Resource Management and HPA
By Ruben Liquenson · Jul 1, 2026
Kubernetes Resource Management and HPA: practical guide for DevOps engineers and platform teams.
Zero-Downtime Deployments with Kubernetes
By Ruben Liquenson · Jun 30, 2026
Zero-Downtime Deployments with Kubernetes: practical guide for DevOps engineers and platform teams.
Helm Chart Best Practices
By Ruben Liquenson · Jun 29, 2026
Helm Chart Best Practices: practical guide for DevOps engineers and platform teams.
Kubernetes Networking with Cilium
By Ruben Liquenson · Jun 27, 2026
Kubernetes Networking with Cilium: practical guide for DevOps engineers and platform teams.
GitOps con ArgoCD: De Zero a Producción en AWS EKS
By Ruben Liquenson · Jun 25, 2026
Guía completa para implementar GitOps con ArgoCD en AWS EKS. Instalación, configuración, multi-environment con Helm y 5 mejores prácticas de producción.
Terraform Modular en AWS: La Guía Definitiva para Producción
By Ruben Liquenson · Jun 20, 2026
Cómo estructurar Terraform modular en AWS con remote state en S3, DynamoDB locking, workspaces DEV/PROD y CI/CD con GitHub Actions.
Kubernetes en Producción: 20 Verificaciones Antes del Go-Live
By Ruben Liquenson · Jun 15, 2026
Checklist completo de 20 verificaciones críticas para Kubernetes en producción: resource limits, HPA, network policies, RBAC, secrets y observabilidad.
Kubernetes on bare metal with kubeadm: architecture decisions from k8s-on-premise
By Ruben Liquenson · Jun 10, 2026
How we built a production-grade Kubernetes cluster on bare metal using kubeadm, Vagrant and VirtualBox. Architecture decisions, networking with Calico, GitOps with ArgoCD — and why we chose bare metal over EKS for this project.
GitOps with ArgoCD: eliminating manual deployments in production
By Ruben Liquenson · Jun 5, 2026
How gitops-stack achieves zero manual kubectl apply in production. ArgoCD auto-sync, drift detection, SSM instead of SSH, CloudTrail audit — every decision explained.
Modular Terraform: one architecture pattern across 6 projects
By Ruben Liquenson · Jun 1, 2026
The Terraform module structure we use across all lra-cloud-ops projects. VPC, EKS, RDS, IAM as independent modules. S3 remote state with DynamoDB locking. How the same pattern scales from a single project to a fleet.
Deploying a SaaS Platform on AWS ECS Fargate: Architecture and Operational Decisions
By Ruben Liquenson · May 8, 2026
Architecture decisions behind NexoraTech: traffic flow, Terraform module boundaries, dev/prod topology differences, OIDC CI/CD without static credentials, CloudFront cache strategy and Testcontainers integration testing.
Building a Natural Language AWS Operations Agent with Claude and boto3
By Ruben Liquenson · May 5, 2026
Architecture of the AWS DevOps Agent: Claude Sonnet 4.6 as the reasoning layer, 31 boto3 tools as the execution layer, and the engineering decisions that determine whether a tool-use agent is operationally useful.
Production AWS Infrastructure with Terraform: EKS, RDS Multi-AZ and Dual CI/CD Pipelines
By Ruben Liquenson · May 3, 2026
Architecture decisions for a modular Terraform stack deploying Flask on EKS with RDS PostgreSQL 15 Multi-AZ, dual GitHub Actions and Jenkins pipelines, and SonarCloud coverage gates. What each decision costs and why it was made.
GitOps on Kubernetes: Git as the Authoritative Source for Cluster State
By Ruben Liquenson · May 1, 2026
How ArgoCD enforces GitOps: auto-sync, prune and selfHeal behavior, why kubectl apply is incompatible with GitOps, and the operational constraints this architecture imposes on teams.
Production Container Design: Multi-Stage Builds, Non-Root Users and Health Checks
By Ruben Liquenson · Apr 28, 2026
The design decisions that separate a container image that runs from one that is production-ready. Multi-stage builds, non-root execution, database connection retry logic and meaningful health check endpoints.
CI/CD Pipeline Architecture with GitHub Actions and AWS ECS
By Ruben Liquenson · Apr 28, 2026
How to design a production CI/CD pipeline with OIDC authentication, parallel quality gates, automated rollback and zero long-lived AWS credentials. Architecture decisions and operational tradeoffs.
Reusable Terraform Modules: Interface Design and State Isolation
By Ruben Liquenson · Apr 15, 2026
How to structure Terraform modules with clear input/output contracts, state isolation between environments and dependency boundaries that allow independent evolution of each infrastructure component.
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