Open Source Summit Europe 2025: Full Schedule

25-27, August 2025
Amsterdam, Netherlands
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Note: The schedule is subject to change.

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This schedule is automatically displayed in Central European Summer Time, CEST (UTC +2). To see the schedule in your preferred timezone, please select from the drop-down menu to the right.

IMPORTANT NOTE: Timing of sessions and room locations are subject to change.

11:00 CEST

VM-Friendly Networking on Kubernetes: Customizable Networks, Live Migration, and Best Practices - Surya Seetharaman & Miguel Barroso, Red Hat

Tuesday August 26, 2025 11:00 - 11:40 CEST

G001-002

Bringing virtual machines into Kubernetes introduces unique networking challenges, especially in public cloud environments. Traditional Kubernetes Networking plugins, designed for ephemeral containers, fall short in supporting virtualization-specific needs like stable IPs during live migrations and network segmentation. This talk explores how the CNCF projects OVN-Kubernetes and KubeVirt work together to provide networking that supports the needs of virtual machines on Kubernetes.

OVN-Kubernetes is a robust network plugin for Kubernetes clusters. KubeVirt is a virtualization plugin that manages the lifecycles of VMs on Kubernetes. In this session, we will introduce these projects and walk you through:

- How to set up multiple, customizable networks in Kubernetes

- How to connect your applications and VMs to separate, isolated networks

- How to perform live VM migration across Layer 2 networks without downtime

- Best practices for configuring your networking setup based on your platform—whether you're running in the cloud or on-prem

Join us to learn how to build flexible, VM-friendly networking on Kubernetes.

Speakers

Miguel Duarte Barroso

Principal Software Engineer, Red Hat

Miguel is a Principal Software Engineer for OpenShift Virtualization at Red Hat.

Surya Seetharaman

Principal Software Engineer, Red Hat

Surya is an Open Source advocate and contributor, active in the Kubernetes SIG-Network working group. She is working as a Principal Software Engineer at Red Hat in the OpenShift Networking team. Her areas of interest include Cloud Infrastructure and Networked Services and Systems... Read More →

Tuesday August 26, 2025 11:00 - 11:40 CEST
G001-002

Cloud & Containers

Audience Experience Level Advanced

14:10 CEST

Quantum Curious? Your Cloud Native Launchpad for K8s-based Quantum Simulations - Anmol Krishan Sachdeva & Samrat Priyadarshi, Google

Tuesday August 26, 2025 14:10 - 14:50 CEST

G109

Intrigued by quantum computing but unsure where to begin? This beginner-friendly session charts a practical path using accessible, open-source tools. Discover how open-source Python libraries like Cirq and Qiskit makes defining your first quantum circuits for simulation surprisingly straightforward. We'll then explore how to take these Python-based simulations, package them into standard containers, and run them directly on Kubernetes – the ubiquitous platform for modern applications.

See a live demo running a basic containerized Python-based quantum simulation as a standard Kubernetes Job, showcasing deployment in this powerful environment.

We'll also map the road ahead: as needs scale, understand how the open Kubernetes ecosystem could support advanced management via CNCF tools (like Kueue) for K8s-native queueing and HPC scheduler integrations (like Slurm) for larger batch workloads.

Get a clear roadmap from your first Python script to running Quantum Simulations on K8s, understanding the path towards tackling larger challenges using open, cloud-native approaches.

Speakers

Anmol Krishan Sachdeva

Sr. Hybrid Cloud Architect, Google

Anmol is a seasoned International Tech Speaker (delivered 75+ talks), a Distinguished Guest Lecturer, an active conference organizer, and has published several notable papers. He works at Google and focuses on Emerging Technologies.

Samrat Priyadarshi

Cloud Engineer, Google

Samrat is a Cloud Engineer at Google with 8 years of experience in Cloud Computing focussing mainly on Kubernetes and related landscapes. He has delivered multiple international and national conferences including Open Source Summit, Japan, 2024. He has a Youtube channel with more... Read More →

Tuesday August 26, 2025 14:10 - 14:50 CEST
G109

Open Source 101

Audience Experience Level Advanced

14:10 CEST

Rebooting the Republic: OS Operating Systems for Governments - Alexander Smolianitski, Zentrum Digitale Souveränität

Tuesday August 26, 2025 14:10 - 14:50 CEST

G105

What does it take to switch an entire public sector workspace to open source, including backend services and operating system? Backend services are deeply integrated with the IT architecture of the German public sector, making them challenging to replace. A recent feasibility study undertaken by the German Centre for Digital Sovereignty (ZenDiS) has investigated the legal, economic, and technical viability of replacing proprietary operating systems and backend services with open source alternatives in government agencies. Additionally, the study has explored the possibility of adopting an "ultramobile-first" strategy, where smartphones and tablets with OS operating systems, such as Android, are used as primary devices, and specialised applications are accessed through web browsers. The talk will discuss the findings of the study and the potential implications for the introduction of OS operating systems in the German public sector.

Speakers

Alexander Smolianitski

Head of Open Source Products, Zentrum Digitale Souveränität

Alexander Smolianitski heads the product development department at ZenDiS, bringing a combination of technical expertise and administrative know-how to the table. His professional career spans from a renowned PR agency to a startup of his own, and ultimately to the position of Chief... Read More →

Tuesday August 26, 2025 14:10 - 14:50 CEST
G105

OpenGovCon

Audience Experience Level Advanced

10:10 CEST

Is the Zephyr Device Tree Too Complicated? - Tim Guite, Magpie Embedded

Wednesday August 27, 2025 10:10 - 10:20 CEST

D202

The device tree is one of the defining characteristics of the Zephyr project. Using concepts borrowed from Linux, along with its best buddy Kconfig, it allows us to leverage the ecosystem to avoid endlessly rewriting the same drivers. It is also one of the most challenging aspects of Zephyr for developers to get their head around as they venture into the woods beyond the “Getting Started” guide. Device trees can contain repeated, redundant information and parameters which are difficult to trace back to their source. On the other hand, the device tree caters to an incredibly wide range of users who might be setting up a single accelerometer or specifying the peripheral mapping for a multi-core SoC. So, is the device tree too complicated, is it just right, or are there other ways to tackle this problem?

Speakers

Tim Guite

Embedded Systems Engineer, Magpie Embedded

Tim Guite is an embedded systems engineer with over 7 years of industry experience in medical devices, scientific research and biotechnology. He is a big fan of the increasing use of open source tooling in the embedded space. While he possesses a wide range of knowledge, Tim acknowledges... Read More →

Wednesday August 27, 2025 10:10 - 10:20 CEST
D202

Zephyr Developer Summit

Audience Experience Level Advanced

16:20 CEST

Demystifying Containers and Container Images - Dan Čermák, SUSE

Wednesday August 27, 2025 16:20 - 17:00 CEST

G109

Containers have become a cornerstone of modern IT infrastructure, yet, despite their widespread adoption, many technical fundamentals behind the container ecosystem are not widely known and lead to confusion and open questions like:

- Are containers just lightweight virtual machines?

- What are the layers of a container image?

- Are containers inherently more secure than workloads running on bare metal?

This session aims to demystify the underlying concepts behind containers and container images. We will trace the historical and technical evolution, beginning with foundational features like namespaces and cgroups, and how they are employed by container engines like Docker and Podman. Then we will provide an overview of how container images are constructed and how containers are launched from container images by Docker and Podman.

Whether you are new to containerization or looking to solidify your foundational knowledge, this talk will provide you with the necessary groundwork to successfully navigate the containerization landscape.

Speakers

Dan Čermák

Senior Full Stack Web Developer, SUSE

Dan is working as a Senior Web developer, building container images, creating developer tools and sometimes works on QA at SUSE, which he joined after working as an embedded firmware developer. Originally he started out as a theoretical astrophysicist, but after becoming a contributor... Read More →

Wednesday August 27, 2025 16:20 - 17:00 CEST
G109

Open Source 101

Audience Experience Level Advanced