Blog

Mert Özen's blog posts on software development, backend, frontend, and DevOps.

Series

.NET Core Web API 36 Angular 31 JavaScript Basics 19 JavaScript Intermediate 18 JavaScript Advanced 16 TypeScript Basics 14 TypeScript Intermediate 14 TypeScript Advanced 12 Entity Framework Core 28 Dapper 16 Git & GitHub 29 Web Security (OWASP Top 10) 21 LLM Fundamentals 20 C# Fundamentals 20 Object-Oriented Programming in C# 16 C# Collections and Generics 11 LINQ 17 Asynchronous Programming in C# 17 Advanced C# 14 C# Versions 6 Solution Patterns 22 SOLID and Design Principles 12 Clean Code 13 Design Patterns 23 UML and Modeling 18 Introduction to Software Architecture 9 Clean, Onion and Hexagonal Architecture 8 Vertical Slice Architecture 6 Domain-Driven Design 12 CQRS and Event Sourcing 10 Messaging and Event-Driven Architecture 9 Modular Monolith 2 Microservices 10 UI Architecture Patterns 9 Architecture Decisions 7 System Design 15 Distributed Systems Fundamentals 11 Background Jobs and Scheduled Jobs 11 Working with Message Queues 14 Logging in .NET 10 Caching 10 Real-time Applications 9 ASP.NET Core MVC and Razor Pages 13 CI/CD Fundamentals 8 GitHub Actions 16 Jenkins 12 Web Servers and Hosting 12 Deployment Strategies 9 Kubernetes 19 Authentication and Authorization 18

2 posts found #configmap

Newest Oldest Popular

DevOps PART 07

.NET Configuration with ConfigMaps and Secrets: Environment Variables, Volumes and Picking Up Changes

ConfigMaps and Secrets enter .NET configuration as environment variables (ConnectionStrings__Default) or as files in a volume; env and subPath mounts never update, directory mounts update in 10 to 80 seconds. Measured on kind, .NET 10's default watcher missed the ConfigMap change while the polling watcher caught it. We also cover the provider order trap, triggering rollouts, immutable ConfigMaps, base64 not being encryption and Angular's config.json.

8 Nov 2026 10 min 4

DevOps PART 14

Environments with Kustomize: Bases, Overlays, Image Tags and configMapGenerator

With Kustomize shared manifests live in a base, each environment writes only its differences in an overlay, and configMapGenerator's hash suffix triggers a rollout when config changes. With real output we share an HPA/PDB through a component, compare JSON Patch with strategic merge patch, run kustomize edit set image in CI, and watch commonLabels change a selector and take the service down through a half-finished apply.

8 Nov 2026 9 min 4