> -----Original Message----- > From: Alex Huang [mailto:alex.hu...@citrix.com] > Sent: 17 February 2014 11:13 > To: dev@cloudstack.apache.org > Cc: Anthony Xu > Subject: RE: [PROPOSAL] Granular Controller Support in CloudStack over VMware > deployments > > Sateesh, > > I think if you want to do this then it points to a larger change to > templates. Today, the templates carry no meta information. This means > templates should carry meta information regarding the os image and how to > support it. This should not specifically target vmware. It can > benefit all other hypervisors. I know Anthony's also been working on > something similar for XenServer. I suggest you guys get together and > think about the right approach to abstract this and how to pass this > information to the hypervisor from the template.
Sure. My current proposal is to leverage details property of template, which would be persisted to template_details table. > > --Alex > > > -----Original Message----- > > From: Sateesh Chodapuneedi [mailto:sateesh.chodapune...@citrix.com] > > Sent: Sunday, February 16, 2014 8:48 PM > > To: dev@cloudstack.apache.org > > Subject: [PROPOSAL] Granular Controller Support in CloudStack over > > VMware deployments > > > > Hi, > > > > I would like to add support for granular disk controller support for > > CloudStack over VMware deployments. > > > > To access virtual disks, CD/DVD-ROM, and SCSI devices, a virtual > > machine uses storage controllers. > > > > Virtual storage controllers appear to a virtual machine as different > > types of controllers of type IDE or SCSI. Further SCSI controllers can > > be classified into 4 sub types, as below > > BusLogic Parallel > > LSI Logic Parallel, > > LSI Logic SAS > > VMware Paravirtual SCSI > > > > Currently CloudStack supports following combinations only. > > DATA volumes - SCSI controller (LSI Logic Parallel) - Hard coded > > in source code, no option for user to edit/choose the controller type > > ROOT volumes - IDE or SCSI (LSI Logic Parallel) - Baed on value of > > global configuration parameter "vmware.root.disk.controller" > > > > Currently the instances are deployed with the the LSI Parallel controller > > type. > > This might result in failure to boot when attempting to deploy > > templates that use the LSI SAS controller. > > > > CloudStack should provide administrator the means to choose the type > > of disk controller (including sub types listed in introduction section > > above) for an instance. The controller to be used by VM to access > > virtual disk (volume) can decided for various reasons. Some of them are > > listed here, > > * Some controllers are optimized for best performance over specific > > backend infrastructure like SAN. Ex: VMware Paravirtual SCSI > > * Compatibility of some controllers with VM's virtual hardware version or > > guest operating system. > > * Operating system vendor recommendation and default set of drivers > > distributed as part of operating system image. Ex: Windows 8.1 ISO > > doesn't have Lsi Logic Parallel SCSI drivers by default. Hence a > > virtual disk attached to this controller won't accessible during > > installation of OS using the ISO. > > > > CloudStack should provide administrator an option which auto detects > > the recommended disk controller for the instance's guest operating > > system and applicable virtual hardware version. > > Kindly let me know your thoughts. > > > > JIRA ticket - CLOUDSTACK-4787 > > > > Note:- Detailed Functional Specification is to be added at > > cwiki.apache.org under 4.4 Design documents. Currently > > cwiki.apache.org is down. Waiting for the site to come up to add the FS > > document. > > > > Regards, > > Sateesh
