A couple of years ago I deployed an openstack cluster based on RDO. Back in the days we implemented the kilo release. Until today we didn't updated yet due to various reasons being no need for the new features, no resources, no time no.. Upgrading would be a better option but we'll have to live with it and since it's running rather well so far we are quite happy with it.

To manage that cloud I use the clients I installed on my local machine, from nova to cinder they all have different packages available for many different platforms. Only …

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 …

last couple of days I have been fighting with the way an static ip is configured on an openstack virtual centos 6 instance. In our specific use case we ditched as many network openstack services as possible as I previously described.

We want to have the instances running in our current network spaces of the R&D department. In this department until some days ago we didn't had any DHCP server running. But a few weeks back we added an extra remote network space into our platform where we configured a remote compute-node.

This is where the issues started popping …

Some of you may already have notices others just stumbled on this post through a search engine, I have set up an openstack private cloud at one of our projects:

• vlan flat-neutron provider network
• layer2

We have noticed that the benefits of having a private cloud is spreading through the different teams within the organization and therefore the interest into this flexibility is growing. Since this wasn't the original use case we are encountering some design issues right now.

For the original instances the default overcommit ratios are fine. But the request for new machines with other goals are like …

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 …