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Transactional Outbox Pattern: DB와 브로커를 일관되게 맞추기

Doosan published on July 09, 2026

11 min, 2165 words

Categories: post

Tags: RabbitMQ MassTransit outbox messaging EF Core distributed systems

IdentityServer UserClaims 이해하기: User, Identity Resource, API Resource의 차이

Doosan published on July 06, 2026

13 min, 2508 words

Categories: post

Tags: C# ASP.NET Core IdentityServer OAuth 2.0 OpenID Connect Claims

ASP.NET Core Identity와 OpenIddict, Claims 인증 구조 이해하기

Doosan published on July 04, 2026

12 min, 2378 words

Categories: post

Tags: C# ASP.NET Core Identity OpenIddict OAuth 2.0 OpenID Connect

웹훅이 핸드쉐이크에서 죽었다: ERR_TLS_CERT_ALTNAME_INVALID 디버깅

Doosan published on June 22, 2026

3 min, 551 words

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Tags: tls ssl certificate webhook dns debugging

선빵친놈이 이긴다 — RabbitMQ Exchange 상태 불일치 디버깅

Doosan published on June 22, 2026

6 min, 1008 words

Categories: post

Tags: RabbitMQ MassTransit debugging messaging

SSH로 GitHub 계정 두 개 동시에 쓰기 (회사 + 개인)

Doosan published on June 17, 2026

5 min, 820 words

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Tags: git ssh github command

Docker 구성요소와 레이어: docker, dockerd, containerd, runc, Colima, Lima

Doosan published on June 17, 2026

5 min, 809 words

Categories: post

Tags: docker colima lima containerd

Layer 1 — docker CLI (클라이언트)

Doosan published on June 17, 2026

4 min, 611 words

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Tags: docker cli layers

Layer 2 — dockerd (데몬 / API 서버)

Doosan published on June 17, 2026

4 min, 681 words

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Tags: docker dockerd daemon layers

Layer 3 — containerd (컨테이너 런타임)

Doosan published on June 17, 2026

4 min, 709 words

Categories: post

Tags: docker containerd runtime layers