Wei-Yu Chen — Writinghttps://weiyu.dev/writing/Notes on AI engineering, DevOps, and working systems.enGive EKS Nodes a Dedicated EBS Volume for Containershttps://weiyu.dev/writing/eks-node-two-ebs/https://weiyu.dev/writing/eks-node-two-ebs/Isolate containerd storage on a second EBS volume, configure an EKS launch template, and inspect disk I/O under load.Fri, 31 Oct 2025 12:00:00 GMTHow IAM Roles for Service Accounts Work in EKShttps://weiyu.dev/writing/eks-irsa-mechanism/https://weiyu.dev/writing/eks-irsa-mechanism/Follow IRSA from Pod admission and projected service-account tokens to AWS STS credentials and the node-role fallback.Wed, 30 Oct 2024 12:00:00 GMTDeploying the NGINX Ingress Controller on EKShttps://weiyu.dev/writing/nginx-ingress-controller-in-eks/https://weiyu.dev/writing/nginx-ingress-controller-in-eks/Configure load-balancer access and TLS for NGINX on EKS, then deploy and test tea and coffee example services.Sat, 27 Jan 2024 12:00:00 GMTNeMo Guardrails: Controlling Chatbot Behaviorhttps://weiyu.dev/writing/nemo-guardrails/https://weiyu.dev/writing/nemo-guardrails/Build a telecommunications chatbot with Colang flows, input and output checks, and a retrieval-backed knowledge base.Sat, 13 Jan 2024 12:00:00 GMTKarpenter: Architecture and a Walk Through the Sourcehttps://weiyu.dev/writing/karpenter-mechanism/https://weiyu.dev/writing/karpenter-mechanism/A version-specific walk through Karpenter’s provisioning loop, scheduling constraints, NodeClaims, and Kubernetes events.Fri, 12 Jan 2024 12:00:00 GMTMoving a Development Environment from Intel to Apple Siliconhttps://weiyu.dev/writing/macbook-switch-from-intel-to-apple-silicon/https://weiyu.dev/writing/macbook-switch-from-intel-to-apple-silicon/Understand migrated Intel applications, Rosetta, and the Homebrew prefix differences that affect a development environment.Tue, 31 Oct 2023 12:00:00 GMTBuilding a 5G Lab with free5GC and UERANSIMhttps://weiyu.dev/writing/free5gc-ueransim-5g/https://weiyu.dev/writing/free5gc-ueransim-5g/Revisit a complete 2020 5G lab: kernel and dependencies, free5GC and UERANSIM builds, subscribers, and PDU sessions.Tue, 08 Dec 2020 12:00:00 GMTAdding an HTTP REST API to a gRPC Service with grpc-gatewayhttps://weiyu.dev/writing/grpc-gateway/https://weiyu.dev/writing/grpc-gateway/Define an employee service in protobuf, implement its gRPC methods, generate an HTTP gateway, and test it with cURL.Tue, 10 Nov 2020 12:00:00 GMTA Blog CI/CD Pipeline with AWS and GitHub — Theme Fixes and Private Configurationhttps://weiyu.dev/writing/aws-codepipeline-build-cicd-blog-i/https://weiyu.dev/writing/aws-codepipeline-build-cicd-blog-i/Finish a static-site pipeline with custom error pages, corrected Hexo links, and separately managed private configuration.Sat, 11 Apr 2020 12:00:00 GMTA Blog CI/CD Pipeline with AWS and GitHub — Part 3: CloudFront and Lambdahttps://weiyu.dev/writing/aws-codepipeline-build-cicd-blog-3/https://weiyu.dev/writing/aws-codepipeline-build-cicd-blog-3/Connect a custom domain to CloudFront and S3, and use Lambda@Edge to support nested directory index pages.Fri, 10 Apr 2020 12:00:00 GMTA Blog CI/CD Pipeline with AWS and GitHub — Part 2: Buildspechttps://weiyu.dev/writing/aws-codepipeline-build-cicd-blog-2/https://weiyu.dev/writing/aws-codepipeline-build-cicd-blog-2/Write a CodeBuild buildspec with installation and build phases, artifact selection, naming, and directory preservation.Thu, 09 Apr 2020 12:00:00 GMTA Blog CI/CD Pipeline with AWS and GitHub — Part 1https://weiyu.dev/writing/aws-codepipeline-build-cicd-blog-1/https://weiyu.dev/writing/aws-codepipeline-build-cicd-blog-1/Connect GitHub, CodePipeline, CodeBuild, and S3, and resolve the artifact-bucket permissions needed by the build.Wed, 08 Apr 2020 12:00:00 GMT