Hi Ewan,
> This would then allow you to configure which OSes have NX turned on, etc. Is
> this something that you want to tackle, Cory?
I'm already working on a way to do this, which is what prompted me to
ask for input on the various vm-params. :)
Thanks for the feedback. I've consolidated our vm-params and removed
ones that are already defaults.
Cory
--
Cory Wright
Software Developer
cory.wri...@rackspace.com
On Thu, Feb 17, 2011 at 5:53 PM, Ewan Mellor <ewan.mel...@eu.citrix.com> wrote:
>> -----Original Message-----
>> From: Cory Wright
>> Sent: 17 February 2011 20:41
>>
>> [Snip]
>>
>> Below are the vm-params from Nova that are different from what we
>> (Rackspace) currently use:
>>
>> Nova:
>> Linux:
>> platform: {}
>
> The platform flags (acpi, apic, etc) are specific to HVM, and they have no
> effect for PV domains, so this is fine.
>
>> PV_args: 'noninteractive'
>
> I think this just applies to our pre-manufactured Debian Etch VM, and really
> shouldn't be here. Salvatore, you added this as far as I can tell -- what
> was the thinking here?
>
>> Windows:
>> platform: {'acpi': 'true', 'apic': 'true',
>> 'pae': 'true', 'viridian': 'true'}
>
> These are "good enough", but ideally we'd set these on a per-OS basis.
> XenServer sets these using the appropriate template to match the OS that's
> going to be installed, so you can see what differences there might be by
> listing our templates and getting the recommended set of flags. Most of the
> time, this set is fine, but you might see performance degradation on older
> versions of Windows if you don't match what we do in the appropriate
> XenServer template.
>
> We currently don't have anywhere to put these flags, so we end up with this
> hardcoded list. It would be good to improve this. We could figure out a
> scheme whereby some metadata in Glance (e.g. an OS hint) turned into the
> appropriate HVM platform flags. This would then allow you to configure which
> OSes have NX turned on, etc. Is this something that you want to tackle, Cory?
>
>> Both:
>> other_config: {}
>> user_version: '0'
>
> These are the defaults, so it makes no difference specifying them.
>
>> Also, we supply the following vm-params to all instances when booting
>> but they are not currently used in Nova.
>>
>> ha_always_run: true,
>
> This says, "if the VM shuts down, for whatever reason, then immediately start
> it again". I presume this isn't what you want, but I presume that it isn't
> taking effect because you don't have HA turned on. If my assumptions are
> correct, then I'd set this to false, for clarity.
>
>> blocked_operations: {}
>> ha_restart_priority: ""
>> tags: []
>> xenstore_data: {},
>
> All four are the default, so no effect.
>
> Cheers,
>
> Ewan.
>
>
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