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 #systemd

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DevOps PART 09

Parallel, Matrix, input and Deploy Stages in Jenkins

We deploy the same package first to staging and, after an input approval that holds no agent, to production with sshagent, rsync and systemctl; Lockable Resources solves concurrency and milestone solves ordering. A deploy script with a health check, real lock output where an old build deploys after a new one, inversePrecedence, failFast, a Node 22/24 matrix and the app_offline.htm structure for IIS.

8 Nov 2026 10 min 5

DevOps PART 08

Running a .NET App as a systemd Service on Linux

Run Kestrel under systemd as a separate user with Type=notify and AddSystemd, KillSignal=SIGTERM and hardening settings; KillSignal=SIGINT cuts open requests and systemd still reports success. We measure publish option sizes, the runtime coming from the distribution repository on Ubuntu 24.04, journald output, restart after a crash, the exposure score dropping from 9.2 to 3.8, and 0.2-second deploys and rollbacks with a releases/current symlink.

8 Nov 2026 12 min 5