Over the last couple weeks I have been using exoscale, a swiss public cloud provider based on CloudStack. They just launched after a beta testing phase that I had the chance to be part of. Their offering is primarily aimed at developers. The folks at Exoscale were kind enough to give me couple "gift cards" during the CloudStack Geneva meetup and I was able to get going. Together with PCExtreme, Leaseweb, and iKoula they are one more European public cloud provider in production with Apache CloudStack that I know of.
Their cloud is almost straightforward: two data centers in Geneva and Vernier, with hardware hosted by Equinix. They run Apache CloudStack 4.0.2, the latest release and use KVM hypervisors on Ubuntu based servers. One customization that they made and that I am aware of is that they patched CloudStack to output logs using logstash and use Kibana for visuzalization. They offer CentOS 6.4 and Ubuntu 12.04/13.04 64 bit templates with instance types from 512MB with 1 core to 32 GB with 8 cores. Their development and operations team is relatively small for such an offering but they are backed by the Veltigroup a leading IT provider in Switzerland, which gives them a 20 person team for support. Their developers are seasoned IT infrastructure enthusiasts who participate in the DevOps, openBSD, Clojure and Pallet community. The lead developer, Pierre-Yves Ritschard, formerly with paper.li, recently participated in DevOps Days Paris and has contributed a Clojure client to CloudStack: clostack. They are embracing open source, not only by using it, but also by contributing to the various communities that make up the foundation of Cloud services.
While CloudStack comes with a powerful and efficient Web UI, exoscale decided to create their own UI and integrate it with a ticketing, monitoring and billing system that they developed. It reinforces the fact the CloudStack API is extremely rich and that the default UI was actually designed as a proof of concept rather than something that all users should use. The UI will please developers by its simplicity and straigthforward ease of use. From talking to them, I know they they will soon open source the python client they developed to build the UI backend. Pierre Yves told me it resembled a little bit my toy UI that uses Flask and builds a REST wrapper on top of the CloudStack API. See a snapshot of an instance view below: