DevOps・ソフトウェアエンジニアリングブログ
DevOps、クラウドインフラ、ソフトウェア開発について、実際にその仕事をしている人たちによる実践的な記事。
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CloudService Mesh in Production: Istio, Linkerd, and the Trade-offs Nobody Talks About
Service meshes promise mTLS, observability, and traffic management out of the box. What they don't advertise is the operational complexity that comes with them.
Platform EngineeringDORA Metrics: Measuring Engineering Performance Without Fooling Yourself
Deployment frequency, lead time, change failure rate, and MTTR are the closest thing our industry has to a validated performance model. Here's how to instrument them correctly and avoid turning them into a gaming exercise.
SecuritySecrets Management in Production: Vault, Cloud Secret Managers, and the External Secrets Operator
Secrets management isn't a checkbox you tick once — it's the difference between rotating a leaked credential in minutes and finding out about the breach from a third party. Here's how to actually do it.
ObservabilityOpenTelemetry in Production: Instrumenting Services Without Losing Your Mind
OpenTelemetry is now the industry standard for observability instrumentation — but most teams get stuck choosing between auto-instrumentation magic and manual SDK control. Here's how to do it right.
DevOpsProgressive Delivery: Blue-Green, Canary, and Feature Flags Compared
Progressive delivery separates 'deployed' from 'released' so bad changes affect a handful of users instead of all of them. Here's how blue-green, canary, and feature flags actually differ — and when to reach for each.
Software DevelopmentZero-Downtime Database Migrations: The Expand-Contract Pattern in Practice
Zero-downtime database migrations aren't a tooling feature you enable — they're a discipline you apply to every schema change. Here's the expand-contract pattern, step by step.