Unmanaging a rack or tower server

You can remove a rack or tower server from management by Lenovo XClarity Administrator. This process is called unmanaging.

Before you begin

You can enable XClarity Administrator to automatically unmanage devices (including Flex System chassis, Flex System and rack switches, Flex System servers, System x servers, ThinkAgile, and ThinkSystem servers) that are offline for a specific amount of time. This is disabled by default. To enable the automatic unmanagment of offline devices, click Hardware > Discover and Manage New Devices from the XClarity Administrator menu, and then click Edit next to Unmanage offline devices is Disabled. Then, select Enable unmanage offline devices and set the time interval. By default, devices are unmanaged after being offline for 24 hours.

Before you unmanage a rack or tower server, ensure that there are no active jobs running against the server.

If you want to remove the server pattern and any virtual addresses on the rack or tower server, deactivate the server profile before unmanaging the server (see Deactivating a server profile).

When Call Home is enabled in XClarity Administrator, Call Home is disabled on all managed chassis and servers to avoid duplicate problem records from being created. If you intend to discontinue using XClarity Administrator to manage your devices, you can re-enable Call Home on all managed devices from the XClarity Administrator in lieu of re-enabling Call Home for each individual device at a later time (see Re-enabling Call Home on all managed devices).

About this task

When you unmanage a rack or tower server, Lenovo XClarity Administrator performs the following actions:
  • Clears the configuration used for centralized user management.
  • Removes the baseboard-management-controller security certificate from the XClarity Administrator trust store.
  • Removes access to the NTP server from the management controller.
  • If Encapsulation is enabled on the device, configures the devices firewall rules to the settings before the device was managed.
  • Removes the CIM subscriptions to the XClarity Administrator configuration so that XClarity Administrator no longer receives events from the rack or tower server.
  • Disables Call Home on the rack or tower server if Call Home is currently enabled on XClarity Administrator.
  • Discards events that were sent from the rack or tower server. You can retain these events by forwarding the events to an external repository, such as a syslog (see Forwarding events).

When you unmanaged a rack or tower server, XClarity Administrator retains certain information about the server. That information is reapplied when you manage the same rack or tower server again.

Important: If you unmanaged a ThinkServer server and then manage that server using another XClarity Administrator instance, information about the server is lost.
Tip: All demo devices that are optionally added during initial setup are nodes in a chassis. To unmanage the demo devices, unmanage the chassis using the Force unmanage even if the device is not reachable option.

Procedure

To umanage a rack or tower server, complete the following steps.

  1. From the XClarity Administrator menu bar, click the Hardware > Servers to display the Servers page.
  2. Select one or more rack or tower servers to be unmanaged.
  3. Click Unmanage. The Unmanage dialog is displayed.
  4. Optional: Select Force unmanage even if the device is not reachable.
    Important: When unmanaging demo hardware, ensure that you select this option.
  5. Click Unmanage.
    The Unmanage dialog shows the progress of each step in the unmanagement process.
  6. When the unmanagement process is complete, click OK.