Hi, I’m Miroslav Vadkerti

Sr Principal Software Engineer at Red Hat, leading the Testing Farm team. I build CI testing infrastructure for Fedora, RHEL, and CentOS Stream. Linux desktop enthusiast running a custom BlueBuild image on Fedora Atomic Desktops. I write about Linux, open source, and technology.

Silencing Alerts During OpenShift Cluster Upgrades with Prometheus and Alertmanager

How to detect OpenShift cluster upgrades, extend the detection window to cover the recovery period, and use Alertmanager inhibit rules to suppress noisy alerts during upgrades.

How a Single Regex Stalled 30 Testing Farm Jobs for Hours

Tracing stuck Testing Farm jobs from process list through Python stack traces to a catastrophic regex backtracking bug in tmt — caused by a 1M-character line in test output.

Fixing Emoji Fonts in Chrome on Fedora Atomic Desktops

How I debugged and fixed missing emoji rendering in Google Chrome on a BlueBuild/Fedora Atomic Desktops system — and why fontconfig wasn’t the answer.

Hello World

First post on the blog – who I am, why I started writing, and what to expect.