PowerVM

  • 1.  Dlpar in RHCOS ?

    Posted Thu January 28, 2021 07:39 AM
    Hi,

    Anyone knowing if Dlpar would be working in RHCOS VMs? 
    Is it doable even in theory? :)

    Br,
    tommi

    ------------------------------
    Tommi Sihvo, Lead Service Architect
    TietoEVRY, Compute Services
    email tommi.sihvo@tieto.com mobile +358 (0)40 5180 Finland
    ------------------------------


  • 2.  RE: Dlpar in RHCOS ?

    Posted Fri January 29, 2021 07:53 AM
    Hi Tommi,

    For sure you can do DLPAR on RHCOS VMs running on Power Systems, it's one of the advantage compared to x86 !
    There is an issue about this.
    https://github.com/ocp-power-automation/ocp4-playbooks/issues/26
    .
    If you need more informations let us known, we implemented it in our environment with success. Have a nice day.
    Thierry.

    ------------------------------
    Thierry Huche
    IBM France
    33499580675
    ------------------------------



  • 3.  RE: Dlpar in RHCOS ?

    Posted Sat April 03, 2021 01:20 PM
    Hi Thierry,

    I have clusters running on Power 8 one at version 4.6.22 and one at 4.7.3 with PowerVC at 2.0.1.  I tried your solution for RMC and it works fine but if I have to reboot a node when it comes back up RMC is no longer active.  Is there a way to restart it, did I miss something.

    Thanks,

    ------------------------------
    Paul Hess
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  • 4.  RE: Dlpar in RHCOS ?

    Posted Fri January 29, 2021 07:53 AM
    Hi Tommi,

    For sure you can use Dlpar on RHCOS VMs, it's one of the advantage of Powr Systems compared to x86 !
    .
    The procedure is described here : https://github.com/ocp-power-automation/ocp4-playbooks/issues/26
    .
    Let us known if you need more informations, we implemented it with success in our environment. Have a nice day.
    .
    Thierry

    ------------------------------
    Thierry Huche
    IBM France
    33499580675
    ------------------------------



  • 5.  RE: Dlpar in RHCOS ?

    Posted Fri January 29, 2021 09:01 AM
    Awesome! Thanks Thierry!

    I should have known that you guys have sorted this out already :)

    Br,
    tommi

    ------------------------------
    Tommi Sihvo, Lead Service Architect
    TietoEVRY, Compute Services
    email tommi.sihvo@tieto.com mobile +358 (0)40 5180 Finland
    ------------------------------



  • 6.  RE: Dlpar in RHCOS ?

    Posted Fri January 29, 2021 07:53 AM

    Hello Tommi,

    We have a procedure available to enable RMC in rhcos for PowerVM. Nevertheless, I'm not 100% sure it's official yet.

    Even though it's valid, from a linux and Power perspective, I believe K8S/Kubelet is enabled for cpu/memory live change.

    As far as I know, the kubelet needs to be restarted to take cpu/memory changes into account.

    Regards, Sylvain.



    ------------------------------
    Sylvain Delabarre
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  • 7.  RE: Dlpar in RHCOS ?

    Posted Fri January 29, 2021 09:48 AM
    Hi Tommi:

    If I am not mistaken you have to install IBM productivity tool packages to support the dynamic LPAR functions on Linux partitions  (both Red Hat and Suse). You can download them  at https://www.ibm.com/support/pages/service-and-productivity-tools  (ibm-power-managed  is the Package)

    Also there  were a few differences between what was offered under PowerKVM and PowerVM (when it was announced originally) https://www.redbooks.ibm.com/technotes/tips1317.pdf 

    I have not worked in the recent years on that technology and if I find a Whitepaper, I will send it across to you.


    ------------------------------
    Sridhar Murthy
    Senior Certified IT Specialist
    IBM
    3039240413
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  • 8.  RE: Dlpar in RHCOS ?

    Posted Fri January 29, 2021 04:39 PM
    Thanks for all replies; 
    Br,
    tommi

    ------------------------------
    Tommi Sihvo, Lead Service Architect
    TietoEVRY, Compute Services
    email tommi.sihvo@tieto.com mobile +358 (0)40 5180 Finland
    ------------------------------