Recently I was been asked to increase the MTU on the deployed openstack cluster at one of our customers. Since the beginning of my touch on openstack networking has been the hardest part to get my head around. In the first place because openstack does some nifty things on the networking path. But also cause for the use case at the customer a lot of customization has been done to get it implemented in their infrastructure.

Hence the shiver when the MTU question was been made..

Nevertheless together with a colleague who likes a challenge and has a profound knowledge …

A few months ago I implemented an RDO based openstack kilo release private cloud at one of our customers for their development platform. Through time we tackled a couple of issues so the cloud could be fitted into their work flows.

We stumbled onto some minor issues and some major ones. Let's begin with the minor ones ;)

When upgrading the all-in-one controller before we started using the cloud in 'production' a mean bug bit us in the ankle due to a new hiera package. After some digging around a patch came to the rescue together with the exclusion of the …

at one of my projects I was been asked to set up a private cloud for a validation platform. The whole idea behind this proof of concept is based on the flexibility to spin up and down certain instances providing some specific functionality so tests banks can be ran against them.

As soon as the tests are finished the machines could be terminated. Those instances should be configured using some configuration management software, like puppet. That way the instances are rebuildable and could be treated as cattle.

On the other hand, it takes about 20 minutes to build up an …