After completing my kubernetes setup, I realise that there is some caveats and stuff to know beforehand :

• Kubernetes is not admin friendly, it's meant to be user friendly more or less
• If you don't know anything about BGP/OSPF, you will have a hard time implementing a "simple" overlay network and will have to use flannel, calico or whatever shit they put on their documentation. On my end, quagga and bgpd ftw.
• Kubernetes is multimaster "by design" but none of the daemons are multimaster compliant, so you will have to setup some DNS infrastructure if you don't already have one
• This is a good product, you might overlook it and prefer to use Mesos or its wrapper DC/OS, imho : it would be a mistake to dismiss kubernetes VS mesos on the simple fact that it's harder to setup.

it took me a good week to properly understand and setup, I think this is the minimum learning curve for anybody who want to properly understand what is done and could be done.