Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'd like to take OpenStack for a test drive with some spare gear so I've been trying to find and read documentation on it but I'm awash in package names and feel like I'm trying to drink from a firehose. :-)

What I'm shooting for is setting up a private cloud that's got some redundancy where I can lose any single node without losing the VMs running on the cloud. As I understand it, there's some storage mechanism OpenStack uses called Swift that accomplishes this? Does MAAS use swift by default? Is each MAAS node providing storage for the cloud as a whole?

The Ubuntu cloud docs I read say the minimum number of MAAS nodes is 6. But other OpenStack docs seem to imply that one can run with fewer nodes. What is the minimum number of MAAS nodes do I need to have at least minimal redundancy? And what do I need to do besides installing MAAS nodes, a cluster controller and a region controller and juju? Are there extra steps on top of that to have various levels of HA?

All I'm shooting for at this point is storage redundancy and having VMs (at worst) reboot if the node they had been running on died...

share|improve this question

I found a diagram that helps with figuring out nodes and charms here. It requires a minimum of 6 nodes. Here is a link to MAAS+juju with High Availability

Did you ever solve the question? If so, will you post your solution so others can benefit from your findings.

share|improve this answer
Welcome to Ask Ubuntu. Please elaborate the procedure in your answer. Read How to Ask for more information. – Braiam Aug 3 '13 at 0:07 Not sure if this is the document you're going off at all? This details how to setup the system with MaaS and juju's.

share|improve this answer
Welcome to Ask Ubuntu. Please elaborate the procedure in your answer. Read How to Answer for more information. – Braiam Aug 3 '13 at 0:38

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.