The Sched app allows you to build your schedule but is not a substitute for your event registration. You must be registered for KubeCon + CloudNativeCon Europe 2025 to participate in the sessions. If you have not registered but would like to join us, please go to the event registration page to purchase a registration.
Please note: This schedule is automatically displayed in British Summer Time (BST) (UTC +1). To see the schedule in your preferred timezone, please select from the drop-down menu to the right, above "Filter by Date." The schedule is subject to change and session seating is available on a first-come, first-served basis.
Is it even possible to migrate 35 clusters in an air-gapped environment with a custom PKI infrastructure to ClusterAPI without Downtime? We'll show you why and how this can be pulled off, and how you could do the same.
The journey starts with our legacy provisioning setup (a mix of kubeadm/ansible/puppet), followed by the migration path and tooling. Along the road, we'll discover a series of challenges such as loss of etcd quorum, matching legacy/new kube-apiserver configuration, mismatching etcd encryption keys, and more.
After a live demo of a migration, the session explores managing our fleet of clusters with ArgoCD (with a focus on simple Talos configuration files in our repositories thanks to a few templating tricks, and a clean ClusterAPI workload cluster overview through ArgoCD ApplicationSets).
The presentation concludes by addressing a critical puzzle: solving the chicken/egg bootstrapping problem of the first ClusterAPI management cluster(s).
