Understand how to write logs to a file in Go, avoid common pitfalls, and build a production-ready logging setup with performance and safety in mind.

Last9 is a  blog focusing on DevOps practices, cloud architecture, and software engineering methodologies. Through insightful articles, tutorials, and case studies, Last9 addresses various aspects of modern software development, including continuous integration and continuous delivery (CI/CD), infrastructure as code (IaC), containerization, and microservices architecture. By sharing best practices, real-world experiences, and expert insights, Last9 equips developers, DevOps engineers, and IT professionals with the knowledge and tools needed to build, deploy, and manage resilient and scalable cloud-native applications.

Last9

A comprehensive guide to implementing file logging in Go applications, covering everything from basic file output using the standard library to advanced structured logging with packages like Logrus and Zerolog. The guide addresses production considerations including log rotation, permission management, error handling, and performance optimization. It demonstrates practical patterns for environment-specific configuration, concurrent logging safety, and integration with observability platforms.

How to Write Logs to a File in Go

Structured Logging with Performance in Mind

How to Ship File Logs Safely to Production

Add Context to Your Logs (Request IDs, Trace Info, and More)

<p>The good thing about this article is that it specifies the log file in the /var/log directory.</p>
