https://blog.jiwon.io/en A technical blog on web development and AI coding tools. Practical setups, architecture notes, and troubleshooting for production work. en 2026-06-22T10:24:35+09:00 https://blog.jiwon.io/en/posts/ollama-self-hosted-language-model-runner/ Learn how to install and run language models on your personal machine using Ollama. We explore the setup process, model selection criteria, and performance tradeoffs for practical applications. https://blog.jiwon.io/en/posts/ollama-self-hosted-language-model-runner/ 2026-06-22T10:21:40+09:00 https://blog.jiwon.io/en/posts/building-local-code-review-cli-with-ollama-python/ Learn how to build a code review CLI tool that runs locally using Ollama and Llama 3, avoiding API costs and security concerns. This guide covers practical tips, from prompt design to understanding its limitations. https://blog.jiwon.io/en/posts/building-local-code-review-cli-with-ollama-python/ 2026-06-17T11:15:25+09:00 https://blog.jiwon.io/en/posts/gemini-1-5-pro-tool-use-connecting-llms/ Learn how to apply the Tool Use (Function Calling) feature of Gemini 1.5 Pro in practice. This post covers how the model recognizes and requests calls to external functions, its configuration, and potential failure scenarios. https://blog.jiwon.io/en/posts/gemini-1-5-pro-tool-use-connecting-llms/ 2026-06-17T10:34:31+09:00 https://blog.jiwon.io/en/posts/cursor-ide-real-world-review-and-limitations/ This post covers Cursor IDE's core features and setup, and shares experiences from applying it to real projects. A senior developer analyzes the pros and clear limitations of its AI-based code generation, editing, and chat features. https://blog.jiwon.io/en/posts/cursor-ide-real-world-review-and-limitations/ 2026-06-17T01:40:15+09:00 https://blog.jiwon.io/en/posts/jetbrains-ai-assistant-practical-deep-dive/ This post analyzes the setup, core features, and pros and cons of the AI Assistant built into JetBrains IDEs. It goes beyond simple code completion to present real-world problems and solutions in refactoring, commit message writing, and more. https://blog.jiwon.io/en/posts/jetbrains-ai-assistant-practical-deep-dive/ 2026-06-17T01:25:10+09:00 https://blog.jiwon.io/en/posts/building-production-level-rag-based-ai-agent-with-crewai-and-langchain/ An in-depth guide on building a production-ready RAG-based AI agent using CrewAI and LangChain. This post covers the architecture, practical code implementation, performance optimization, and operational best practices for an autonomous research automation system, providing a complete guide to real-world expertise. https://blog.jiwon.io/en/posts/building-production-level-rag-based-ai-agent-with-crewai-and-langchain/ 2026-06-09T15:10:01+09:00 https://blog.jiwon.io/en/posts/python-grpc-production-guide-for-microservices/ Overcome the limitations of REST APIs in modern microservice architectures. This practical guide demonstrates how to build a high-performance internal communication system using Python, gRPC, and Protocol Buffers. It covers key best practices for production environments, including error handling, authentication, and load balancing. https://blog.jiwon.io/en/posts/python-grpc-production-guide-for-microservices/ 2026-05-25T10:12:26+09:00 https://blog.jiwon.io/en/posts/postgresql-streaming-replication-high-availability-guide/ Discover a practical guide to achieving database high availability (HA) and load balancing with read replicas using PostgreSQL streaming replication. This guide covers postgresql.conf and pg_hba.conf settings, failover strategies, and monitoring best practices for production environments. https://blog.jiwon.io/en/posts/postgresql-streaming-replication-high-availability-guide/ 2026-05-11T10:07:00+09:00 https://blog.jiwon.io/en/posts/building-production-level-centralized-logging-system-with-fluentd-on-kubernetes/ This in-depth guide covers how to build a centralized logging system using the Fluentd, Elasticsearch, and Kibana (EFK) stack to efficiently collect, process, and analyze large-scale logs in a production Kubernetes cluster. Discover practical configurations and optimization tips. https://blog.jiwon.io/en/posts/building-production-level-centralized-logging-system-with-fluentd-on-kubernetes/ 2026-05-04T10:03:05+09:00 https://blog.jiwon.io/en/posts/production-kubernetes-ingress-with-aws-eks-and-alb-controller/ This post provides an in-depth guide on installing and configuring the AWS Load Balancer Controller for efficient external traffic management in an AWS EKS environment. Master the art of building a production-grade Kubernetes Ingress, including SSL/TLS termination, health checks, advanced routing, and real-world best practices. https://blog.jiwon.io/en/posts/production-kubernetes-ingress-with-aws-eks-and-alb-controller/ 2026-04-27T09:59:32+09:00 https://blog.jiwon.io/en/posts/production-monitoring-with-prometheus-and-grafana/ A complete guide for server engineers and developers on building a real-time monitoring system with Prometheus and Grafana. Covers Docker-based setup, custom metric instrumentation, PromQL queries, and performance optimization best practices. https://blog.jiwon.io/en/posts/production-monitoring-with-prometheus-and-grafana/ 2026-04-20T15:00:01+09:00 https://blog.jiwon.io/en/posts/nginx-reverse-proxy-caching-load-balancing-blue-green/ Learn advanced Nginx reverse proxy configurations for high-performance web services. Master everything from microcaching to increase cache hit rates, load balancing with health checks, to zero-downtime deployment (Blue/Green) strategies through practical code examples. https://blog.jiwon.io/en/posts/nginx-reverse-proxy-caching-load-balancing-blue-green/ 2026-04-13T09:55:58+09:00 https://blog.jiwon.io/en/posts/building-production-ready-aws-vpc-with-terraform-modules/ Learn how to build a scalable, reusable, production-level AWS VPC network using Terraform. This guide provides key know-how for efficiently managing complex cloud infrastructure through Terraform modularization strategies and practical HCL code based on IaC principles. https://blog.jiwon.io/en/posts/building-production-ready-aws-vpc-with-terraform-modules/ 2026-04-06T16:44:10+09:00 https://blog.jiwon.io/en/posts/building-serverless-rest-api-with-aws-lambda-api-gateway/ A practical guide to building a scalable, cost-effective, and high-performance serverless REST API using AWS Lambda and API Gateway, without the complexities of traditional server management. It covers everything from Python-based hands-on code and AWS SAM templates to performance optimization tips. https://blog.jiwon.io/en/posts/building-serverless-rest-api-with-aws-lambda-api-gateway/ 2026-04-06T15:48:16+09:00 https://blog.jiwon.io/en/posts/aws-elasticache-redis-high-performance-caching-strategy-guide/ Discover AWS ElastiCache for Redis caching strategies to reduce database load and dramatically improve response times. This guide covers cache invalidation, data consistency, and performance optimization techniques with practical code examples. https://blog.jiwon.io/en/posts/aws-elasticache-redis-high-performance-caching-strategy-guide/ 2026-04-06T15:36:54+09:00 https://blog.jiwon.io/en/posts/django-ci-cd-pipeline-with-github-actions-and-docker/ A practical guide for experienced developers on building a Django CI/CD pipeline with GitHub Actions. Covers test automation, Docker image building, pushing to AWS ECR, and deploying to EC2 with detailed YAML code examples. https://blog.jiwon.io/en/posts/django-ci-cd-pipeline-with-github-actions-and-docker/ 2026-04-06T15:26:09+09:00 https://blog.jiwon.io/en/posts/perfect-dev-environment-with-docker-and-vscode-dev-container/ Are you looking for a way to ensure all team members work in the same environment and eliminate the 'it works on my machine' problem? This practical guide shows you how to build a consistent and isolated development environment, regardless of your OS, using Docker and VS Code Dev Containers. https://blog.jiwon.io/en/posts/perfect-dev-environment-with-docker-and-vscode-dev-container/ 2026-04-06T15:16:18+09:00 https://blog.jiwon.io/en/posts/building-a-production-ready-local-development-environment-with-docker-compose/ Learn how to solve the 'it works on my machine' problem using Docker and Docker Compose. This practical guide shows you how to build a multi-container development environment with Python Django, PostgreSQL, and Redis, creating an environment similar to production. https://blog.jiwon.io/en/posts/building-a-production-ready-local-development-environment-with-docker-compose/ 2026-04-06T15:10:17+09:00 https://blog.jiwon.io/en/posts/dockerizing-your-web-application-for-consistent-development/ Learn how to build a Docker development environment to solve the "but it works on my machine..." problem. This post provides a step-by-step guide to creating a consistent and reproducible development environment using Dockerfile and Docker Compose. https://blog.jiwon.io/en/posts/dockerizing-your-web-application-for-consistent-development/ 2026-04-06T00:00:00+09:00 https://blog.jiwon.io/en/posts/multiple-wsl2-instances/ Learn how to set up and manage multiple development environments using WSL2 on Windows 11. This guide covers installation, configuration, and tips for optimizing your workflow. https://blog.jiwon.io/en/posts/multiple-wsl2-instances/ 2024-12-04T00:00:00+09:00 https://blog.jiwon.io/en/posts/cloudflare-invalid-ssl/ Learn why the Cloudflare Full (strict) SSL mode fails while Full mode works, especially when using GitHub Pages as the origin server. Understand common SSL issues and how to fix them for a secure and seamless connection. https://blog.jiwon.io/en/posts/cloudflare-invalid-ssl/ 2024-12-01T00:00:00+09:00 https://blog.jiwon.io/en/posts/nodejs-installation-failure/ Discover how to fix common package installation errors when setting up Node.js on Windows 11. This guide provides clear solutions for handling compilation issues with C/C++ and Python using Chocolaty. https://blog.jiwon.io/en/posts/nodejs-installation-failure/ 2024-11-15T00:00:00+09:00 https://blog.jiwon.io/en/posts/ubuntu22-default-setting/ Discover the key initial setup steps for Ubuntu 22.04 LTS on AWS EC2. This guide focuses on configuring low-spec instances for development and testing environments, perfect for free tier usage. https://blog.jiwon.io/en/posts/ubuntu22-default-setting/ 2024-10-15T00:00:00+09:00 https://blog.jiwon.io/en/posts/datagrip-driver-error/ Learn how to resolve driver errors when connecting Amazon RDS to JetBrains DataGrip. This guide covers common issues and practical solutions for seamless database management. https://blog.jiwon.io/en/posts/datagrip-driver-error/ 2024-09-15T00:00:00+09:00 https://blog.jiwon.io/en/posts/ubuntu22-swap-memory/ Learn to configure swap memory on Ubuntu 22.04 LTS to address RAM shortages on low-spec servers. Perfect for AWS EC2 and self-hosted servers running resource-heavy applications. https://blog.jiwon.io/en/posts/ubuntu22-swap-memory/ 2024-08-15T00:00:00+09:00 https://blog.jiwon.io/en/posts/style-guide/ As this is the first post on my blog, it serves as a record and an explanation of the basic style guide for this site. https://blog.jiwon.io/en/posts/style-guide/ 2024-07-15T00:00:00+09:00