Totally agreed. My current work assignment is to put OpenStack Swift (a distributed object storage) in Kubernetes, so exactly the kind of application that you would expect to catch fire in a cluster. The experience has been very pleasant so far. Maybe I'll speak about it at Kubecon Europe in March (if the organizers like my abstract).

EDIT: I forgot that I actually have something to link to, since we open-sourced our Helm chart yesterday: https://github.com/sapcc/helm-charts/tree/master/openstack/s...

There are some other custom pieces that we built for a Kubernetized Swift. Just search for repos with "swift" in their name in the same GitHub org.