[Starlingx-discuss] Couple of questions about STX

[Yong Hu]

Hi Felex, pls see my comments inline.


On 02/09/2019 4:27 PM, Felix Kretschmer wrote:
> Hi Yong,
> thanks for the answer. Starting with OpenStack VMs. Containers via K8S might also be a later possibility.
> 
> So everything running on OpenStack will work with STX? I know that windows works with OpenStack.
> 
YES, StarlingX doesn't change OpenStack. It's supposed to make 
deployment of OpenStack easier.

> The kvm in STX supports RT by VMs?
>
Yes, it does. We ever tested a CentOS with RT kernel as the guest OS in VM.


> Is there any information about the demos you were talking about. Would be interested in gained experiences there.
If you can articulate your use cases in details, we might share more 
about how to deploy.

> Best,
> Felix
> 
> Von meinem Mobiltelefon gesendet
> 
>> Am 02.09.2019 um 09:56 schrieb Yong Hu <yong.hu at intel.com>:
>>
>> Felix,
>> pls see my comments inline.
>>
>> In addition, are you going to use OpenStack VMs or K8S containers?
>>
>>
>> Regards,
>> Yong
>>
>>> On 02/09/2019 3:24 PM, Felix Kretschmer wrote:
>>> Hello *,
>>> I am at the research of possible technologies for my use case and came across STX.
>>> Reading through the documentation and website I came up with a couple of questions and hope someone can help me by finding answers.
>>> 1. Realtime capabilities
>>> I did not find any information about the realtime capabilities. Is STX in the compute nodes ready for time deterministic workloads within VMs? e.g. PREEMPT_RT Linux or bare metal virtual machines? I guess kvm is the underlying hypervisor?
>> Compute node host Linux could be with standard kernel or RT kernel. Similarly guest OS in VM can have one of them.
>> Yes, we are using KVM and QEMU.
>>> 2. Windows VMs
>>> So far I did not find anything about Windows VMs. Due to the integration of Nova and the underlying technologies, I suppose this is possible without any doubts. Is it?
>> Good question. We haven't tried Windows as guest OS in VMs. Technically it should be okay to install a Windows VM on top of OpenStack.Checking out this doc: https://docs.openstack.org/image-guide/windows-image.html
>>
>>> 3. Hardware requirements
>>> Probably the most interessting topic for me, because the requirements for bare metal installations seem quite high (Dual-socket with 8 cores each and 32GB RAM) for compute nodes.
>>> Is this necessary? I wanted to deploy a couple of compute nodes, but with a lot smaller hw requirements as well (single socket octa or even quad cores with 16 or 8 GB of RAM). How much does the system of compute nodes itself needs? Quite a lot I suppose if the controller needs 64GB of RAM.
>>
>> It should be doable.
>> In some experimental cases (like demos), we did install compute nodes on PCs (core based, 16GB RAM), though StarlingX preferable memory size is 32GB...
>> As well, Supporting *smaller* work-notes ongoing effort...
>>
>>> Thanks for any help.
>>> Best,
>>> Felix
>>> Von meinem Mobiltelefon gesendet
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