Unmanaging a chassis

The IBM® Flex System Manager management software web interface enables you to remove a chassis from management. However, to remove managed compute nodes in a chassis, you should first make sure that you remove all operating systems and virtual servers that are associated with those compute nodes.

Before you unmanage a chassis that is under management software management, complete the process in the following list. Detailed information about each of these actions is provided in this section.

Important: If you do not complete the following steps before you unmanage the chassis, the compute nodes in the chassis will not be removed from the management software, and removing the compute nodes will be more complicated.
  1. Remove the operating system instances for the operating systems that are running on each compute node.
  2. Remove guest operating system instances on the virtual servers that are managed by the hypervisor on each compute node.
  3. Remove the instances for the virtual servers that are managed by the hypervisor on each compute node.
  4. (Optional) Remanage the chassis after the unmanage operation is complete.

When you unmanage a chassis, the management software deletes information related to the chassis and its virtual and physical managed endpoints. Any data related to these endpoints that was manually entered and existed only in the management software might need to be re-entered after remanaging the chassis. Data that is external to the management software is not deleted during an unmanage operation, but the management software might not display it after the initial remanage.

Notes:
  • You can temporarily unmanage and then remanage a chassis or compute node without affecting assigned Configuration Patterns profiles. If a compute node or chassis is removed from management by the management software, the configuration profiles assigned to those systems remain. You can unassign the profiles and deploy them to other systems, or you can unassign and delete the profiles.
  • When a chassis is unmanaged, the IBM Service and Support Manager component of the management software no longer monitors chassis errors and reports serviceable problems directly to IBM Support through Electronic Service Agent™ (ESA). To enable call home and IBM Support for the unmanaged chassis, you must configure the Service and Support settings on the Chassis Management Module (CMM).
    To configure service and support for the chassis on the CMM, complete the following steps:
    1. Log in to the CMM.
    2. Click Service and Support > Settings.
    3. Select the Enable IBM Support box; then, complete the other fields on the page.
    4. Click Apply IBM Support Settings.

After you complete the procedures in this section, and the compute node operating systems, compute node guest operating systems, and virtual servers for the compute nodes have been removed from management, you can unmanage the chassis. See Using management domains for more information about unmanaging a chassis.

Parent topic: Managing a chassis