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WHAT IT IS ALL ABOUT Not long ago we’ve been working on deployment of OpenStack Cactus-based public cloud using Xen as an underlying hypervisor. One of the problems we’ve faced were Windows guest instances failing to set up their administrator password to those generated by nova on instance creation. As it turned out the overall process of compute-guest instance communication in …

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Recently we've deployed OpenStack Diablo release for one of our customers. The target operating system happened to be CentOS 6.0. During deployment testing we've stumbled upon a number of bugs in OpenStack RPMs that we've tried to use. All existing RPMs of OpenStack that we've found contained problems that prevented components from operating correctly with each other: 1. Incompatible protocol in packaged …

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As a matter of tradition at this point, we offer a photo report, covering OpenStack Meetup event series hosted by Mirantis and Silicon Valley Cloud Center. Our December 14th event focused on sharing experience around running OpenStack in production. I moderated a panel consisting of Ken Pepple – director of cloud development at Internap, Ray O’Brian – CTO of IT …

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For those folks that have missed our webcast on using OpenStack Compute with NexentaStor for managing VM volumes, recording is below. Please note, you can download the NexentaStor driver for OpenStack here: http://www.nexentastor.org/projects/osvd/files. You can also read additional information about this project here: http://wiki.openstack.org/NexentaVolumeDriver If you need help installing / troubleshooting the Nexenta driver for OpenStack, please do contact us.

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As usual, here are the highlights from the last Bay Area OpenStack Meet & Drink: Toast to Diablo – September 28th, 2011. Thanks to WireRE for hosting us, Dave Nielsen – for helping to organize, and all the attendees – for coming. Once again, this was the biggest MeetUp thus far with 150 in attendance. For those of you that didn’t …

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The simplest way to authenticate a user is to ask for credentials (login+password, login+keys, etc.) and check them over some database. But when it comes to lots of separate services as it is in the OpenStack world, we have to rethink that. The main problem is an inability to use one user entity to be authorized everywhere. For example, a …

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Cloudpipe is used in OpenStack to provide access to project’s instances when using VLAN networking mode. It is just a custom Virtual Machine (VM) prepared in a special way, i.e. coming with an accordingly configured openvpn and startup scripts. More details on what cloudpipe is and why it is needed are available in OpenStack documentation. The process of creating an image …

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Historically, commercial software provided enterprises with reliability and scalability, especially for mission-critical tasks. No one wanted to risk failure in finance, operations, or any essential or enterprise-wide areas. So, enterprises considered open source technology only for less important, more tactical purposes. Recently, however, many large IT organizations have developed significant open source strategies. Cisco, Dell, NASA, and Rackspace came together to …

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How enterprises are progressing from overgrown, difficult-to-manage IT systems to high performance open source infrastructure Over the history of computing, we can trace a pattern of continuous decomposition, from a single system into disparate components. Early on, these individual parts made it easier to design, program and maintain systems, and meet the fast-growing demand for more power and more capacity. The industry …

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Here are the highlights on our corporate team-building in Vegas last week. Special thanks to Rachel and Athena for making this party happen. Thank you to all who participated and helped make it fun. We started by warming up with some drinks in the airport bar on the way over to Vegas. The luggage belt broke upon our arrival and it took …

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After some time working with OpenStack installation using existing LDAP installation for authentication, we encountered one big problem. The latest Dashboard code dropped support of old bare authentication in favor of Keystone-based one. That time Keystone had no support for multiple authentication backends, so we had to develop this feature. Now we have a basic support of LDAP authentication in Keystone …

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For those of you that weren’t able to make it yesterday and maybe for those of you who want to reminisce about the events of last night, Bay Area OpenStack Meet & Drink was probably the most well-attended OpenStack meetup in the valley to date, outside of the OpenStack summit this spring. A diverse crowd of over 120 stackers showed …

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A couple of months ago, Chris Marino, CEO at vCider, stopped by the Mirantis office and gave a very interesting presentation on the vCider networking solution for clouds. A few days later, he kindly provided me with beta access to their product. A few days ago, vCider announced public availability of the product. So now it's a good time to blog …

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As Florian Haas has pointed out in my previous post's comment, our shared storage configuration requires special precautions to avoid corruption of data when two hosts connected via DRBD try to manage LVM volumes simultaneously. Generally, these precautions concern locking LVM metadata operations while running DRBD in 'dual-primary' mode. Let's examine it in detail. The LVM locking mechanism is configured in …

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Today, I want to take a look at some possible issues that may be encountered while using OpenStack. The purpose of this topic is to share our experience dealing with the hardware or software failures which definitely would be faced by anyone who attempts to run OpenStack in production.

Software issue
Let’s look at the simplest, but possibly the most frequent issue. For example, if we need to upgrade the kernel or software that will require a host reboot on one of the compute nodes, the best decision in this case is to migrate all virtual machines running on this server to other compute nodes. Unfortunately, sometimes it may be impossible due to several reasons, such as lack of shared storage to perform migration or cpu/memory resources to allocate all VMs. The only option is to shut down virtual machines for the maintenance period. But how should they be started correctly after being rebooted? Of course, you may set the special flag in nova.conf and instances will start automatically on the host system boot:

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