Hi,

On Thu, Nov 10, 2022 at 6:42 PM Khalil, Ghada <Ghada.Khalil@windriver.com> wrote:

Hello,

Regarding the question below:

       Is there way I can enable application-isolation across all the worker nodes including new nodes to be added in future?

 

Application-isolated CPUs are configured on a per-host basis. When new nodes are added, they will need to be explicitly configured.

 

Is there a specific use-case that you have where it would be beneficial for new nodes to automatically inherit the config of an existing node? There was an old capability where host profiles could be created and applied to new nodes. But this proved problematic as exact hardware matches were not guaranteed. As a result, this capability was abandoned a long time ago.



I was looking for easy method for re-using configuration of for group of nodes and make sure no human errors.
Lets say, all nodes in bladcenter A get specific config.
Right now we have less than 20 workers in a test bed but when it scale to hundreds there is a high chance we might miss one node.


 

Regards,

Ghada

 

From: open infra <openinfradn@gmail.com>
Sent: Wednesday, September 28, 2022 3:32 AM
To: Brito, Thiago <Thiago.Brito@windriver.com>
Cc: starlingx-discuss@lists.starlingx.io
Subject: Re: [Starlingx-discuss] How to enable cpu_dedicated_set

 

[Please note: This e-mail is from an EXTERNAL e-mail address]

 

 

On Wed, Dec 8, 2021 at 3:16 AM Brito, Thiago <Thiago.Brito@windriver.com> wrote:

Did you do an application-apply after you changed the processors to application-isolated? Can you send the output of the command below for you compute pods:

 

kubectl exec -n openstack nova-compute-[woker|controller]-X-XXXXX-xxxx -- cat /etc/nova/nova.conf|grep dedicated_set

 

 

Is there way I can enable application-isolation across all the worker nodes including new nodes to be added in future?

 

Don't forget to change the id of the pod for your compute pods.

 

Thiago

From: open infra <openinfradn@gmail.com>
Sent: Tuesday, December 7, 2021 5:45 AM
To: Brito, Thiago <Thiago.Brito@windriver.com>
Cc: starlingx-discuss@lists.starlingx.io <starlingx-discuss@lists.starlingx.io>
Subject: Re: [Starlingx-discuss] How to enable cpu_dedicated_set

 

[Please note: This e-mail is from an EXTERNAL e-mail address]

Here is the info from STX side

 

 

Processors 

2

Physical Cores Per Processor 

32

Hyper-Threading 

Yes

CPU Assignments

Function

Processor Logical Cores

Platform

Processor 0 : 0,64  

vSwitch

Shared

Application

Processor 0 : 17-31,81-95  
Processor 1 : 56-63,120-127  

Application-isolated

Processor 0 : 1-16,65-80  
Processor 1 : 32-55,96-119 

 

On Tue, Dec 7, 2021 at 1:46 PM open infra <openinfradn@gmail.com> wrote:

Hi Thiago,

 

I have configured the worker as mentioned in the given link and dedicated cpu_policy set in the flavor.

Instance creation failed with the following error.

 

No valid host was found. There are not enough hosts available.



controller-0:~$ openstack flavor show dn.large  -c properties

+------------+--------------------------------------------------------------------------------------------------------+

| Field      | Value                                                                                                  |

+------------+--------------------------------------------------------------------------------------------------------+

| properties | hw:cpu_cores='2', hw:cpu_policy='dedicated', hw:cpu_sockets='1', hw:cpu_threads='2', hw:numa_nodes='1' |

+------------+--------------------------------------------------------------------------------------------------------+



Regards,

Danishka

 

On Tue, Dec 7, 2021 at 1:18 AM Brito, Thiago <Thiago.Brito@windriver.com> wrote:

Hi Danishka,

 

Whatever you configure on the platform as Application-isolated core for a node will get to cpu_dedicated_set on stx-openstack. Please check this doc: https://docs.starlingx.io/r/stx.5.0/admintasks/openstack/configure-dedicated-and-shared-cpu-pools-on-hosts.html

 

Thiago

From: open infra <openinfradn@gmail.com>
Sent: Monday, December 6, 2021 3:15 PM
To: starlingx-discuss@lists.starlingx.io <starlingx-discuss@lists.starlingx.io>
Subject: [Starlingx-discuss] How to enable cpu_dedicated_set

 

[Please note: This e-mail is from an EXTERNAL e-mail address]

Hi,

 

Is the cpu_dedicated_set is already enabled in stx based openstack?

How to verify and enable it?

 

Regards,

Danishka