Many will skip to containers - REALLY?
Hello Enrico and Yaron,
aforementioned article http://www.americanbanker.com/news/bank-technology/why-tech-savvy-banks-are-gung-ho-about-container-software-1078145-1.html is actually IMO nothing more than FUD or far from being objective at least.
Basically to run any workload you're forced to pass through IAAS layer and solve all infrastructure networking, storage and life cycle management issues. You can do it with OpenStack or move all your workloads to AWS, Azure or whatever public cloud which solves IAAS problems for you. For those who would like mix and match traditional and 'dockerized' approaches and don't want to go to public cloud, OpenStack provides enterprise grade support for both workload types.
Also statement that OpenStack is difficult to deploy and operate is nothing more than FUD or misunderstanding at least and this problem was solved long ago with project called Fuel.
OS and Container approaches:
OS Installation and operation:
Note that these projects are outdated now and IMO OS is even more affordable and competitive these days. Every new development cycle brings important improvements in OpenStack world, his is just unbelievable for me to observe how rapidly this platform matures and now is not more any beta, POC or anything like this. I'm expecting massive OS adoption in the near future.