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From Sateesh Chodapuneedi <sateesh.chodapune...@citrix.com>
Subject RE: [MERGE] Support Granular SCSI disk controllers in CloudStack over VMware hypervisor
Date Fri, 13 Feb 2015 05:16:08 GMT
> -----Original Message-----
> From: Rohit Yadav [mailto:rohit.yadav@shapeblue.com]
> Sent: 14 January 2015 14:46
> To: dev@cloudstack.apache.org
> Subject: Re: [MERGE] Support Granular SCSI disk controllers in CloudStack over VMware
hypervisor
> 
> Hi Sateesh,
> 
> Can can send a Github PR for review (if you want to get a code review) and share code
coverage wrt unit (and integration) tests. I
> think if the code coverage is well above 80% I think everyone should be okay with the
merge.
> 
> Let me know if you need any help.
Hi Rohit,
Thanks for your comment. I had to be offline over last month due to some personal urgency.
Sure, I will look at the unit test/code coverage on the changes introduced with this branch
and get back on this.
BTW, the code changes are sitting in ACS branch 'vmware-disk-controllers'.

Regards,
Sateesh
> 
> On Wednesday 14 January 2015 09:06 AM, Sateesh Chodapuneedi wrote:
> > Hi,
> >
> > I would like merge the branch 'vmware-disk-controllers' into master branch. This
branch contains implementation to support
> Granular SCSI disk controllers in CloudStack over VMware hypervisor.
> >
> > This is specific to VMware hypervisor only. The code changes are in area of vmware
resource.
> >
> > All changes are being tracked using JIRA ticket [3] with code in ACS branch 'vmware-disk-controllers'.
> > Please see [2[ for Functional specification which was discussed in proposal thread
[1] below and talk [4] held at CCC EU 2014,
> Budapest.
> >
> > 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"
> >
> > For some guest operating systems like Windows 2012 R2, deploying instances with
LSI Parallel controller might result in failure to
> boot as guest OS vendor is not shipping the OS with LSI Logic parallel drivers.
> > OS Vendor is supporting/shipping LSI SAS controller as preferred.
> >
> > 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.
> >
> > Now CloudStack provides administrator options to specify disk controllers to use
for user instances at various ways.
> > 1) Global configuration settings
> > 2) Template settings (during registration of template)
> > 3) Option to enable auto detection of the recommended disk controller for the instance's
guest operating system by vendor and
> applicable virtual hardware version.
> >
> > Please let me know your comments.
> >
> > Regards,
> > Sateesh
> >
> > [1] http://markmail.org/thread/en4skoqu4mbitacs
> > [2] Functional specification document -
> > https://cwiki.apache.org/confluence/x/vI5cAg
> > [3] https://issues.apache.org/jira/browse/CLOUDSTACK-4787
> > [4] http://ccceu2014.sched.org/event/5d24aad67443542c72b5fc51c25c090b
> >
> >
> > ________________________________________
> > From: Sateesh Chodapuneedi
> > Sent: Tuesday, January 06, 2015 12:06 PM
> > To: dev@cloudstack.apache.org
> > Subject: RE: Server 2012 R2 Bug on CS 4.4.0 with vmware hypervisor
> >
> >> -----Original Message-----
> >> From: Sateesh Chodapuneedi [mailto:sateesh.chodapuneedi@citrix.com]
> >> Sent: 15 November 2014 14:06
> >> To: dev@cloudstack.apache.org; Michael Phillips
> >> Subject: RE: Server 2012 R2 Bug on CS 4.4.0 with vmware hypervisor
> >>
> >> Hi Michael,
> >>
> >>> further clarification; CS adds the data disk to the VM but since
> >>> it's listed as SCSI device 0:0, the vm is unable to find it when you
> >> do a disk rescan.
> >> Yes, due to absence of LSI Logic Parallel driver in the guest, the virtual disk
goes undetected.
> >>
> >> Currently for all data volumes, of user instance deployed by
> >> CloudStack, are attached to  LSI Logic Parallel controller. And this
> >> is not configurable, which is be a blocker for most recent versions of Windows
OS like Windows 2012 R2 and Windows 8.1 which
> does not ship/pack LSI Logic Parallel driver by default, which means all virtual disks
attached to this controller would not detected.
> >>
> >> Support for choice of controllers is in progress and expected to be available
in CloudStack 4.6 release.
> >> I am going to talk about proposal to address this and implementation
> >> details in CloudStack Collaboration Conference scheduled next week at Budapest,
Hungary.
> >>
> >> Link to the entry in conference schedule is [1] and JIRA ticket for
> >> this feature is [2]
> >>
> >> [1]
> >> http://ccceu2014.sched.org/event/5d24aad67443542c72b5fc51c25c090b?ifr
> >> ame=yes&w=&sidebar=yes&bg=no [2]
> >> https://issues.apache.org/jira/browse/CLOUDSTACK-4787
> >
> > Hi,
> >
> > I am working on implementation of this feature based on functional specification
[2] and followed by proposal thread [1] below.
> > All changes are being tracked using JIRA ticket [3] using ACS branch 'vmware-disk-controllers'
> >
> > [1] http://markmail.org/thread/en4skoqu4mbitacs
> > [2] Short link for functional specification document -
> > https://cwiki.apache.org/confluence/x/vI5cAg
> > [3] https://issues.apache.org/jira/browse/CLOUDSTACK-4787
> >
> > Regards,
> > Sateesh
> >>
> >>
> >>> -----Original Message-----
> >>> From: Erik Weber [mailto:terbolous@gmail.com]
> >>> Sent: 15 November 2014 12:01
> >>> To: dev@cloudstack.apache.org
> >>> Subject: Re: Server 2012 R2 Bug on CS 4.4.0 with vmware hypervisor
> >>>
> >>> There's an issue in jira to allow controller selection, but it has been
stale for some time.
> >>>
> >>> This is one of the reasons we switched to xenserver.
> >>>
> >>> I believe there's a quick talk on ccceu about the issue.
> >>>
> >>> Erik
> >>>
> >>> Den lørdag 15. november 2014 skrev Michael Phillips
> >>> <mphilli7823@hotmail.com>
> >>> følgende:
> >>>
> >>>> So I was unable to add a data disk to my vm running server 2012 R2
> >>>> standard, so I started tracking down the issue and I think I found it.
> >>>> So when provisioning a vm running server 2012 R2, CS creates the VM
> >>>> with the "LSI Logic Parallel" adapter. It looks like the only
> >>>> reason the machine is even able to boot is becuase the ROOT drive
> >>>> is set to be an IDE drive, specifically (IDE 0:1). Any data disks
> >>>> added to the same machine are set as SCSI drives. So if I added one
> >>>> data disk it would be listed as SCSI 0:0. So it seems the mismatch
> >>>> is between the controller type CS is using and the disk type. So this
bring me to the major question at hand.
> >>>> For server 2012 R2 vmware natively uses the "LSI Logic SAS" controller.
> >>>> Why in the world is CS not using the same controller, and is there
> >>>> a way around this?
> >>>>
> >>>>
> 
> --
> Regards,
> Rohit Yadav
> Software Architect, ShapeBlue
> M. +91 8826230892 | rohit.yadav@shapeblue.com
> Blog: bhaisaab.org | Twitter: @_bhaisaab PS. If you see any footer below, I did not add
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