Many people refer to ‘cloud’ and ‘virtualization’ in the same breath, and from there assume that the cloud is all about managing the virtual machines that run on your hypervisor. Currently OpenStack supports Virtual Machine management through a number of hypervisors, the most widespread being KVM and Xen. As it turns out, in certain circumstances, using virtualization is not optimal—for example, …

Voting is underway for the sessions to be presented in the OpenStack summit. It's time to make a difference and cast a ballot for some really terrific sessions -- and we're doing our part to ensure you know about ours. While you'll need to be a member of the foundation to vote, we've posted our session descriptions here, below: Cisco Webex Case …

["The supreme art of war is to subdue the enemy without fighting." - Sun Tzu - In other news @VMware joins @openstack.] This tweet by @cloud_borat says it all. Subduing OpenStack is exactly what VMware did by joining the foundation. Every enterprise considering OpenStack that we ever encountered at Mirantis was primarily interested in OpenStack as an open alternative to proprietary VMware. While in …

When I was designing my first OpenStack infrastructure I struggled to find information on how to distribute its numerous parts across the hardware. I studied a number of documents, including Rackspace's reference architecture (which was once at http://referencearchitecture.org but now seems to be mothballed). I also went through the design diagrams presented in the OpenStack documentation. I must admit that back …

Mirantis writing a blog about CloudStack? WTFBBQ? No, it's not April Fool's day. As much as we love OpenStack here at Mirantis, I wanted to see for myself what the CloudStack platform offers, things it does better and worse, what works and what doesn't, how it stacks (pun intended) up against OpenStack, and give CloudStack credit where it's due. The idea …

There is an old saying in IT: "Tough guys never do backups." While this kind of thinking doesn't prevent infrastructures from functioning, it's definitely asking for trouble. And the same goes for monitoring. Having gone through all the pain of polishing an OpenStack installation, I can see why it might seem like a better idea to grab a couple of beers …

In two previous posts, my colleagues Oleg Gelbukh and Piotr Siwczak covered most of the ground on making OpenStack highly available (HA). If you haven't read those posts yet, it's a good time to do so: Oleg's post on OpenStack HA in general Piotr's post on MySQL and RabbitMQ HA. In this post, I'll offer some direct practical advice on completing the puzzle: …

Introduction After the April Essex release, there's big change in planned for OpenStack's volume management; it is now called Cinder. Cinder is a new service for OpenStack, one that separates storage management logic. Until now, in the Essex release, this logic was a part of Nova, and was called the nova-volume component. But, as often happen in software, logical interdependencies between components within …

Oleg Gelbukh's last blog article gave us a bird's eye view of different aspects of high availability in OpenStack. Even though all OpenStack components are designed with high availability in mind, the software still relies on external software, such as the database and the messaging system. It is left up to the user to deploy them in a fail-proof manner. It …

When OpenStack needs to be deployed  for production purposes, be it a small cluster for development environments in a start-up or a large-scale public cloud provider installation, there are several key demands that deployment must meet.  The most frequent and thus most important requirements are: High Availability (HA) and redundancy of service Scalability of the cluster Automation of operations At Mirantis we have developed …

As many of you may know, Rackspace recently released Alamo, their private cloud software which is available here. Rackspace, with help of Ubuntu OS and Chef recipes has created a single ISO capable of deploying OpenStack to commodity hardware in a matter of hours instead of days or weeks. With the promise of bare-metal to fully configured, ready-to-use OpenStack Cloud, …

In a couple of recent posts I covered some fundamental concepts of OpenStack networking, including VlanManager and floating IPs. This post builds upon the recent content and aims to present how traffic flows in different scenarios addressed by OpenStack. Reading the prior posts (VlanManager, FloatingIPs) is highly recommended before going through this blog post. Also, consider before reading that all the scenarios …

OpenStack APAC Conference 2012 stood out as the world's most attended OpenStack conference in history. Quality of the organization was superb. Thank you COSUG and CSDN for putting on an awesome show. Here is an update on our OpenStack adventures in China... Arrived Thursday evening. Here is the Beijing skyline from the 19th floor of Crown Plaza Sun Palace. Humid air …

Mirantis OpenStack ExpressDeveloper Edition:Get Private-Cloud-as-a-Service for a year free. Recently I outlined how VlanManager works and how it ensures network scalability and tenant isolation. Up to this point, however, I've only dealt with fixed IP networks of different tenants. While fixed IPs are what instances are given by default, they do not ensure that the instance is immediately reachable from the outside …

In a previous post I explained the basic mode of network operation for OpenStack, namely FlatManager and its extension, FlatDHCPManager. In this post, I'll talk about VlanManager. While flat managers are designed for simple, small scale deployments, VlanManager is a good choice for large scale internal clouds and public clouds. As its name implies, VlanManager relies on the use of …

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