Working with Alarms
21
Alarms are notifications that occur in response to selected events, conditions, and states that occur with objects
in the inventory. You use the vSphere Client to create and modify alarms.
The vCenter Server system is configured with a set of predefined alarms that monitor clusters, hosts,
datacenters, datastores, networks, and virtual machines. it is also configured with alarms that monitor vCenter
Server licensing.
Each predefined alarm monitors a specific object and applies to all objects of that type. For example, by default,
the Host CPU Usage alarm is set automatically on each host in the inventory and triggers automatically when
any host's CPU usage reaches the defined CPU value.
If the predefined vCenter Server alarms do not account for the condition, state, or event you need to monitor,
you can define custom alarms.
When you set an alarm on a parent object, such as a vCenter Server, a datatcenter, or a cluster, all applicable
child objects inherit the alarm. You can also set an alarm on a folder to propagate the same alarm to all objects
contained in that folder. You cannot change or override an alarm that is set on a child object from its parent
object. You must change the alarm on the child object itself.
Alarms are composed of a trigger and an action.
Trigger
A set of conditions that must be met for an alarm warning and alert to occur.
Most triggers consist of a condition value and a length of time that value is true.
For example, the virtual machine memory alarm triggers a warning when
memory usage is over 75% for one hour and over 90% for five minutes.
VMware uses colors to denote alarm severity:
n
Normal – green
n
Warning – yellow
n
Alert – red
VMware, Inc.
233
Summary of Contents for 4817V62 - vSphere - PC
Page 13: ...Getting Started VMware Inc 13...
Page 14: ...vSphere Basic System Administration 14 VMware Inc...
Page 24: ...vSphere Basic System Administration 24 VMware Inc...
Page 38: ...vSphere Basic System Administration 38 VMware Inc...
Page 76: ...vSphere Basic System Administration 76 VMware Inc...
Page 85: ...Virtual Machine Management VMware Inc 85...
Page 86: ...vSphere Basic System Administration 86 VMware Inc...
Page 98: ...vSphere Basic System Administration 98 VMware Inc...
Page 131: ...3 Click OK Chapter 11 Creating Virtual Machines VMware Inc 131...
Page 132: ...vSphere Basic System Administration 132 VMware Inc...
Page 140: ...vSphere Basic System Administration 140 VMware Inc...
Page 172: ...vSphere Basic System Administration 172 VMware Inc...
Page 182: ...vSphere Basic System Administration 182 VMware Inc...
Page 200: ...vSphere Basic System Administration 200 VMware Inc...
Page 207: ...System Administration VMware Inc 207...
Page 208: ...vSphere Basic System Administration 208 VMware Inc...
Page 278: ...vSphere Basic System Administration 278 VMware Inc...
Page 289: ...Appendixes VMware Inc 289...
Page 290: ...vSphere Basic System Administration 290 VMware Inc...
Page 324: ...vSphere Basic System Administration 324 VMware Inc...
Page 364: ...vSphere Basic System Administration 364 VMware Inc...