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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: …


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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 …


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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 …


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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 …


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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, …


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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 …


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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 …


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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 …


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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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Mirantis OpenStack ExpressDeveloper Edition:Get Private-Cloud-as-a-Service for a year free. In a previous post about OpenStack networking, my colleague Piotr Siwczak explained how FlatManager and FlatDHCPManager works in a multi-host network setup. Here, I will explain how FlatDHCPManager works with single-host networking. It is perhaps easier to understand; it also happens to be the default mode you get when installing OpenStack using one …