VMware vSphere

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  • 1.  Safe to vMotion a vCLS VM?

    Posted Oct 21, 2020 07:59 PM

    Before I do it, I wanted to confirm that it is safe to vMotion (migrate), a vCLS VM.  When I attempt to migrate it, I get the following warning:

    Thank you.

    John C.



  • 2.  RE: Safe to vMotion a vCLS VM?
    Best Answer

    Broadcom Employee
    Posted Oct 21, 2020 08:09 PM

    This may help: VMware Knowledge Base



  • 3.  RE: Safe to vMotion a vCLS VM?

    Posted Oct 21, 2020 08:16 PM

    Yes that was very helpful, thank you! 

    Especially the following:

    • When there is only 1 host - vCLS VMs will be automatically powered-off when the single host cluster is put into Maintenance Mode, thus maintenance workflow is not blocked.
    • When there are 2 or more hosts - In a vSphere cluster where there is more than 1 host, and the host being considered for maintenance has running vCLS VMs, then vCLS VMs will be migrated to other hosts if there are free resources and if they have storage connectivity (shared storage). If these VMs cannot be migrated for the lack of free available resource on other hosts or if these VMs are placed in a local datastore, then these VMs will be powered off automatically to give preference to the host Maintenance Mode operation. As stated before, vSphere DRS for a cluster will not be functional where there is not at least 1 vCLS VM running in that cluster.


  • 4.  RE: Safe to vMotion a vCLS VM?

    Posted Nov 17, 2020 11:56 AM

    I created a list of all questions and considerations around vCLS which I have seen so far:

    http://www.yellow-bricks.com/2020/10/09/vmware-vsphere-clustering-services-vcls-considerations-questions-and-answers/



  • 5.  RE: Safe to vMotion a vCLS VM?

    Posted Aug 02, 2022 10:09 AM

    This didn't work for me, the article you postd "suggests" that you can vMotion but doing so fails.

    Trying to enter the Host into maintenance mode fails because the vCLS vm is still running and now will not migrate to another host?

    is there something i'm missing here, do i need to power the VM down first?



  • 6.  RE: Safe to vMotion a vCLS VM?

    Posted Aug 17, 2022 10:14 AM

     wrote:

    This didn't work for me, the article you postd "suggests" that you can vMotion but doing so fails.

    Trying to enter the Host into maintenance mode fails because the vCLS vm is still running and now will not migrate to another host?

    is there something i'm missing here, do i need to power the VM down first?


    normally you don't need to power them off, unless the VMs are stored on the "host local" vmfs datastore, this would make it impossible to vmotion them.