6.3

Create Alert Denitions for vRealize Operations Manager
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bctid=ref:video_create_alerts_vrom)
Symptoms in Alert Definitions
Symptom denitions evaluate conditions in your environment that, if the conditions become true, trigger a
symptom and can result in a generated alert. You can add symptom denitions that are based on metrics or
super metrics, properties, message events, fault events, or metric events. You can create a symptom
denition as you create an alert denition or as an individual item in the appropriate symptom denition
list.
When you add a symptom denition to an alert denition, it becomes a part of a symptom set. A symptom
set is the combination of the dened symptom with the argument that determines when the symptom
condition becomes true.
A symptom set combines one or more symptom denitions by applying an Any or All condition, and allows
you to choose the presence or absence of a particular symptom. If the symptom set pertains to related
objects rather than to Self, you can apply a population clause to identify a percentage or a specic count of
related objects that exhibit the included symptom denitions.
An alert denition comprises one or more symptom sets. If an alert denition requires all of the symptom
sets to be triggered before generating an alert, and only one symptom set is triggered, an alert is not
generated. If the alert denition requires only one of several symptom sets to be triggered, then the alert is
generated even though the other symptom sets were not triggered.
Recommendations in Alert Definitions
Recommendations are the remediation options that you provide to your users to resolve the problems that
the generated alert indicates.
When you add an alert denition that indicates a problem with objects in your monitored environment, add
a relevant recommendation. Recommendations can be instructions to your users, links to other information
or instruction sources, or vRealize Operations Manager actions that run on the target systems.
Modifying Alert Definitions
If you modify the alert impact type of an alert denition, any alerts that are already generated will have the
previous impact level. Any new alerts will be at the new impact level. If you want to reset all the generated
alerts to the new level, cancel the old alerts. If they are generated after cancellation, they will have the new
impact level.
Object Relationship Hierarchies for Alert Definitions
Object relationship hierarchies determine how one object is related to another. When you create alert
denitions, you select the relationship to identify the symptom object with respect to the base object. These
relationships, for example, ancestor or descendant, produce results based on how the objects are placed in
the relationship hierarchy.
vCenter Server Relationship Hierarchies
Depending on the conguration of your vCenter Server instances, objects have the following possible
hierarchies, from higher to lower objects:
n
Datacenter, Host, Virtual Machine, Datastore
n
Datacenter, Cluster, Host, Virtual Machine, Datastore
n
Datacenter, Host, Datastore
vRealize Operations Manager Customization and Administration Guide
46 VMware, Inc.