DevOps BCN Group

Hello, fellow DevOps enthusiasts 🤓

On February 19th, we'll meet again for a couple of insightful talks, hosted by Allianz Technology Spain!

📍Location: Avda Icària 199, Barcelona | https://maps.app.goo.gl/sijgHEbtZC9yEx1b6

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📅 Agenda

• 18:30 - 18:40 Welcome from the hosts
• 18:45 - 19:30 Beyond Docker Builds: Declarative, Reproducible and Secure OCI Containers with Nix
• 19:30 - 20:15 How to operate and scale 72 Kubernetes clusters in 12 regions worldwide
• 20:15 - 21:00 Networking & Snacks

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🎤 Talks & Speakers

• Title: Beyond Docker Builds: Declarative, Reproducible and Secure OCI Containers with Nix
• Speaker: Arik Grahl - Senior Software Engineer at SysEleven GmbH
• Duration: 30-45 mins
• Abstract: The Open Container Initiative (OCI) standardized the foundation of cloud-native infrastructure. However, most build systems lack determinism due to network access during builds, leading to non-reproducible artifacts and complicating software supply chain security (SSCS). While OCI supports layering for storage and cache efficiency, reflecting shared dependencies across artifacts remains complex.
  Nix, as a package manager, enables declarative and reproducible builds in hermetic, network-isolated sandboxes, requiring all dependencies to be specified up front for long-term reproducibility. Dependencies are treated as first-class citizens, making it easy to generate accurate Software Bill of Materials. With dockerTools in the Nix standard library, these benefits reach the OCI ecosystem. This talk highlights the advantages of fully declarative, reproducible OCI builds with Nix, offering deep insights and benefits to SSCS.
  Let’s not just build containers, let’s declare them reproducibly!
• About: Arik Grahl is a Senior Software Engineer living between Berlin and Barcelona having more than 13 years of experience in full-stack development and operation of infrastructure on bare metal.
  At the moment he mainly develops Golang applications close to Kubernetes and the broader cloud native ecosystem.
  Furthermore, he is excited about everything evolving around Nix(OS) and enjoy contributing to Nixpkgs.

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• Title: How to operate and scale 72 Kubernetes clusters in 12 regions worldwide
• Speaker: Josef Rosel - Senior Cloud Engineer at Dynatrace
• Duration: 30-45 mins
• Abstract: Managing global infrastructure across multiple cloud providers is complex, requiring robust architecture and automation. This session explores proven strategies and tools (OpenTofu, ArgoCD, ArgoWF, Helm, Renovate) for operating large-scale multi-cloud environments, including Kubernetes orchestration, GitOps-driven workflows, and automated dependency management.
• About: Josef Rosel is in DevOps for over a decade, originally from Austria and in Barcelona for two years. Started out with Docker, Mesos, Ansible in a private OpenStack, went over to Azure Devops and RKE to end up in Dynatrace working on both internal, build, test and product clusters.

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🔑 Important Access Note
Our host requires the attendees to provide their ID to grant us access to their offices. Do not forget to fill in the "NIF - NIE - Passport" field when registering!