https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Fri, 12 Jun 2026 00:00:00 GMT https://www.youngju.dev/blog/devops/2026-06-12-keycloak-spi-custom-extension-development.en https://www.youngju.dev/blog/devops/2026-06-12-keycloak-spi-custom-extension-development.en A complete guide to developing Keycloak SPI (Service Provider Interface) extensions. We cover the Provider/ProviderFactory architecture, a full internal SMS OTP Authenticator implementation, a Kafka audit-log EventListener, custom REST endpoints, the User Storage SPI, Testcontainers integration testing, and version compatibility management — all with production-grade code. Fri, 12 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) keycloakspijavasecuritydevopssso https://www.youngju.dev/blog/devops/2026-06-12-keycloak-spi-custom-extension-development.ja https://www.youngju.dev/blog/devops/2026-06-12-keycloak-spi-custom-extension-development.ja Keycloak の SPI(Service Provider Interface)拡張開発を最初から最後まで扱います。Provider/ProviderFactory アーキテクチャ、社内 SMS OTP Authenticator の完全実装、Kafka 監査ログ EventListener、カスタム REST エンドポイント、User Storage SPI、Testcontainers 統合テストとバージョン互換性管理まで、実践コードで整理しました。 Fri, 12 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) keycloakspijavasecuritydevopssso https://www.youngju.dev/blog/devops/2026-06-12-keycloak-spi-custom-extension-development https://www.youngju.dev/blog/devops/2026-06-12-keycloak-spi-custom-extension-development Keycloak의 SPI(Service Provider Interface) 확장 개발을 처음부터 끝까지 다룹니다. Provider/ProviderFactory 아키텍처, 사내 SMS OTP Authenticator 전체 구현, Kafka 감사 로그 EventListener, 커스텀 REST 엔드포인트, User Storage SPI, Testcontainers 통합 테스트와 버전 호환성 관리까지 실전 코드로 정리했습니다. Fri, 12 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) keycloakspijavasecuritydevopssso