About

Hi, I’m Yevhen Vasylenko, the author of YevhenOps.

I’m a Cloud Architect and DevOps Engineer working with AWS, Kubernetes, and K3s. My work includes hybrid and edge infrastructure, multi-account AWS environments, and production platforms managed with Infrastructure as Code.

I enjoy figuring out why a system behaves the way it does, making it easier to operate, and automating the work that keeps coming back. I value simple architecture, strong security, and clear automation.

What you’ll find here

YevhenOps is where I document infrastructure problems I’ve worked through and experiments I want to share:

• AWS architecture and costs: identity federation, multi-account setups, and using operational data to understand cloud spending.
• Kubernetes and K3s operations: authentication, persistent storage, cluster maintenance, and practical runbooks.
• Linux, edge, and self-hosted systems: boot and recovery setups, local hardware, and running language models on machines I own.

Expect configuration examples, commands, troubleshooting notes, and the reasoning behind the choices. My aim is to give you enough detail to reproduce a setup and adapt it to your own environment.

Start with these articles

• Analyze AWS Config Costs — use Athena to identify which resources generate the most configuration records.
• Federate K3s with AWS OIDC — connect K3s service accounts to AWS IAM roles.
• Safely Decommission a K3s Node — work through storage migration before removing a node with Longhorn or local-path volumes.
• Running Qwen3.8-Flash-Next on Two MacBook Pros — a local LLM experiment with setup steps and coding test results.

Connect

Connect with me on LinkedIn or find my projects and code on GitHub.