Users Guide

Manage vCenter settings
About events and alarms
On the Settings page, you can enable the events and alarms for hosts and chassis, select the event posting level, and restore
default alarms. You can configure events and alarms for each vCenter or for all registered vCenters. The events and alarms
corresponding to a chassis are associated with vCenter.
The following are the four event posting levels:
Table 8. Event posting level
Event Description
Do not post any events Do not allow OMIVV to forward any events or alerts into its
associated vCenters.
Post all events Post all events, including informal events, that the OMIVV
receives from managed Dell EMC hosts into its associated
vCenters. It is recommended to select the Post all Events
option as an event posting level.
Post only critical and warning events Posts only events with either a critical or warning into its
associated vCenters.
Post only virtualization-related critical, and warning events Post virtualization-related events that are received from hosts
into related vCenters. The virtualization-related events are
events that Dell selects to be most critical to hosts that run
virtual machines.
When you configure the events and alarms, the critical hardware alarms can trigger the OMIVV appliance to put the host system
into a maintenance mode. In certain cases, migrate the virtual machines to another host system. The OMIVV forwards events
that are received from managed hosts to vCenter and creates alarms for those events. Use these alarms to trigger actions from
vCenter, such as a reboot, maintenance mode, or migrate.
For example, when a power supply fails and an alarm is created, the resulting action puts the machine into maintenance mode,
which results in workloads being migrated to a different host in the cluster.
All hosts outside of clusters, or in clusters without VMware Distributed Resource Scheduling (DRS) enabled, can see virtual
machines being shut down due to a critical event. Dell EMC recommends enabling the DRS before enabling the Dell alarms. For
more information, see the VMware documentation.
The DRS continuously monitors usage across a resource pool and intelligently allocates available resources among virtual
machines according to business needs. To ensure that virtual machines are automatically migrated on critical hardware events,
use clusters with DRS configured Dell alarms. The details of the on-screen message list the clusters on the vCenter instance
that might be impacted. Ensure that you confirm that the clusters are impacted before enabling events and alarms.
If you want to restore the default alarm settings, select the Restore Alarms option. This option is a convenient option to
restore the default alarm configuration without uninstalling and reinstalling the product. If any Dell EMC alarm configurations
have been changed since installation, those changes are reverted using the Restore Alarms option.
NOTE: To receive the Dell events, ensure that you enable the required events in iDRAC, CMC, and Management Controller.
NOTE: The OMIVV preselects the virtualization-related events that are essential to hosts successfully running the virtual
machines. By default, the Dell host alarms are disabled. If Dell EMC alarms are enabled, the clusters should use DRS to
ensure that the virtual machines that send critical events are automatically migrated.
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84 Manage vCenter settings