Here's what RDO enthusiasts have been blogging about in the last few weeks. If you blog about RDO, please let me know (rbowen(a)redhat.com) so I can add you to my list. TripleO: Debugging Overcloud Deployment Failure by bregman You run ‘openstack overcloud deploy’ and after a couple of minutes you find out it failed and if that’s not enough, then you open the deployment log just to find a very (very!) long output that doesn’t give you an clue as to why the deployment failed. In the following sections we’ll see how can […] Read more at http://tm3.org/dv RDO @ DevConf by Rich Bowen It's been a very busy few weeks in the RDO travel schedule, and we wanted to share some photos with you from RDO's booth at DevConf.cz. Read more at http://tm3.org/dw The surprisingly complicated world of disk image sizes by Daniel Berrange When managing virtual machines one of the key tasks is to understand the utilization of resources being consumed, whether RAM, CPU, network or storage. This post will examine different aspects of managing storage when using file based disk images, as opposed to block storage. When provisioning a virtual machine the tenant user will have an idea of the amount of storage they wish the guest operating system to see for their virtual disks. This is the easy part. It is simply a matter of telling ‘qemu-img’ (or a similar tool) ’40GB’ and it will create a virtual disk image that is visible to the guest OS as a 40GB volume. The virtualization host administrator, however, doesn’t particularly care about what size the guest OS sees. They are instead interested in how much space is (or will be) consumed in the host filesystem storing the image. With this in mind, there are four key figures to consider when managing storage: Read more at http://tm3.org/dx os_type property for Windows images on KVM by Tim Bell The OpenStack images have a long list of properties which can set to describe the image meta data. The full list is described in the documentation. This blog reviews some of these settings for Windows guests running on KVM, in particular for Windows 7 and Windows 2008R2. Read more at http://tm3.org/dz Commenting out XML snippets in libvirt guest config by stashing it as metadata by Daniel Berrange Libvirt uses XML as the format for configuring objects it manages, including virtual machines. Sometimes when debugging / developing it is desirable to comment out sections of the virtual machine configuration to test some idea. For example, one might want to temporarily remove a secondary disk. It is not always desirable to just delete the configuration entirely, as it may need to be re-added immediately after. XML has support for comments which one might try to use to achieve this. Using comments in XML fed into libvirt, however, will result in an unwelcome suprise – the commented out text is thrown into /dev/null by libvirt. Read more at http://tm3.org/d- -- Rich Bowen - rbowen(a)redhat.com RDO Community Liaison http://rdoproject.org @RDOCommunity