Cloud Native Vienna: June 2026 MeetUp

We'd like to invite you to our fourth installation for the Cloud Native Vienna MeetUps in 2026!

Again we'll have two deep-dive talks and time to network and chat with friends in the Viennese cloud native community.

A big thank you to WKO Inhouse GmbH for hosting us and providing food and drinks!

Agenda:

• 17:30: Doors Open & Networking
• 17:55: Welcome from the Organizers
• 18:00: Talk 1: Rober Klonner (WKO Inhouse GmbH)
  GitOps Visibility: Precise Argo CD diffs on every Pull Request
• 18:45: Break & Refreshments
• 19:00: Talk 2: Thomas Hanser (Untis GmbH)
  The Untis Platform Engineering Journey: GitOps Multi-Tenancy with Flux, GitLab, and Friends
• 19:45: Open Networking

We look forward to seeing you there!

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Talks:

Rober Klonner (WKO Inhouse Gmbh)
GitOps Visibility: Precise Argo CD diffs on every Pull Request

Today's GitOps deployments are generated through layers of templating - Helm charts, Kustomize or ApplicationSets. Modifying these abstractions and trying to mentally render the output is error-prone.

This talk introduces a method that uses Argo CD itself to render accurate diffs of Helm charts and Kustomize overlays between branches and posts the result directly on your pull request.

We'll walk through a production setup using the Argo CD Operator, Argo CD Diff Preview, and GitLab CI, optimized for performance, minimal maintenance, and security. Through real-world use cases, we'll show what issues this approach catches before they hit your cluster.

Thomas Hanser (Untis GmbH)
The Untis Platform Engineering Journey: GitOps Multi-Tenancy with Flux, GitLab, and Friends

Operating in the European education sector means juggling compliance, student privacy and massive traffic spikes when school starts. Historically at Untis, keeping this running in production was the burden of a single operations team. This session details our transition to an automated, multi-tenant GitOps platform managing a fleet of internal and external Kubernetes clusters. We share our approach of building a platform that gives product teams actual autonomy without compromising on security or control:

• Structured Multi-Tenancy: Mapping GitLab groups to namespaced tenant projects using Flux’s multi-tenant model.
• Secure Access Control: Leveraging the GitLab Agent for Kubernetes to enable scoped, declarative self-service cluster access.
• Flexible Delivery Models: Supporting multiple decentralized deployment strategies by balancing governance and freedom for both internal teams and external guest environments.

Prepare for an honest demonstration of challenges like managing secret lifecycles across a growing fleet, moving from script-driven tenant onboarding to true automated self-service, and wrestling with the classic "chicken-and-egg" problems of bootstrapping Flux and handling GitOps release management.