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

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DevOps PART 11

Managing Jenkins as Code: Configuration as Code (JCasC), plugins.txt and Backups

You manage Jenkins as code with a Dockerfile, a pinned plugins.txt and JCasC YAML in Git, and back up only the state in JENKINS_HOME. The YAML's structure, the export's encrypted-secret trap, a manual change undone on reload, --available-updates, no bundled plugins in the war since 2.580.1, a 1.7 MB backup, a real restore test and the LTS upgrade flow.

8 Nov 2026 7 min 4

DevOps PART 02

Installing Jenkins: LTS with Docker, Java 21, the First Admin and Choosing Plugins

You install Jenkins in Docker with a version-pinned LTS image, a named JENKINS_HOME volume and Java 21, and you skip the setup wizard with plugins.txt and JCasC. The anonymous volume trap, initialAdminPassword, the Docker-in-Docker TLS certificate error, anonymous access, zero executors on the controller, the CSRF crumb, agent-to-controller security and installing from the Linux package.

8 Nov 2026 9 min 5