CoreOS systems are immutable by design, and the /lib/modules directory is not writable. This post explains how to use overlayfs to compose /lib/modules for loading custom kernel modules on Fedora CoreOS.

KubeCon + CloudNativeCon Europe 2025 landed in London, bringing together thousands of cloud-native engineers, maintainers, and enthusiasts. As a local Distributed Systems Engineer deeply embedded in the Kubernetes ecosystem, attending in person was both energizing and insightful. A central theme emerged across sessions: Kubernetes is rapidly evolving beyond microservices, adapting to support batch workloads, AI/ML training, HPC scenarios, and global-scale multi-cluster deployments. This shift isn’t just technical - it’s reshaping the cloud-native landscape and redefining how we think about workload orchestration, scheduling, and autoscaling. Kubernetes may not have been built for these new frontiers - but it’s catching up fast…

I grew up in a small town in southern Italy as a child of the Erasmus generation. I never knew borders - not in the way past generations did. Thanks to the European Union, I could move freely, study abroad, live, and work in different countries without a passport or visa. I was never a foreigner - only a person among people. And yet, despite everything we have built together, despite decades of peace…

Kubernetes scheduling is the brain of the cluster, deciding which node runs each Pod. In this post, I explore advanced scheduling mechanisms in Kubernetes. I start with how the default scheduler works under the hood, then dive into the scheduler-plugins project for extending its capabilities. I review custom schedulers and plugins in the ecosystem that focus on cost savings, SLA optimization, and performance tuning. Finally, I look at future trends in Kubernetes scheduling, from AI-driven algorithms to multi-cluster and energy-aware schedulers. This post brings together the key ideas from the full series I wrote on Kubernetes scheduling.

A recap of the FOSDEM 2025 conference, highlighting key talks, community events, and open-source projects showcased during the event.