Ehsan Ullah (Ahsan Khan) is a Kubestronaut and Cloud, DevOps & AI Engineer — building apps, websites, agentic AI workflows, and self-healing cloud platforms. Available worldwide for freelance, full-time remote, or project-based work.https://ahsankhan420.github.io/en-ushttps://ahsankhan420.github.io/blog/cut-cluster-costs-karpenter/https://ahsankhan420.github.io/blog/cut-cluster-costs-karpenter/A practical walkthrough of right-sizing a production EKS cluster using Karpenter consolidation and Spot instances — without sacrificing availability.Sun, 10 May 2026 00:00:00 GMTkubernetesfinopskarpenterawshttps://ahsankhan420.github.io/blog/gitops-argocd-progressive-delivery/https://ahsankhan420.github.io/blog/gitops-argocd-progressive-delivery/Why pull-based GitOps beats push-based pipelines for Kubernetes, and how sync waves plus Argo Rollouts give you safe, automated, reversible deployments.Sat, 04 Apr 2026 00:00:00 GMTgitopsargocdkubernetesci-cdhttps://ahsankhan420.github.io/blog/observability-three-pillars/https://ahsankhan420.github.io/blog/observability-three-pillars/Logs, metrics and traces stop being silos once they share trace context. A practical mental model for instrumenting microservices with OpenTelemetry.Sun, 15 Feb 2026 00:00:00 GMTobservabilityopentelemetrysrekubernetes