Follow these simple steps to create an alert in vSphere!
Open the vSphere Client.
Step 1: Click on the "File" (menu item) in the vSphere Client".
Step 2: Click on "New".
Step 3: Click on "Alarm..."
Step 4: Click in the "Alarm name: (editable text box)" and type in a name.
Step 5: Then click the "Triggers" tab.
Step 6: Now click the "Add” (push button) and choose a trigger type.
Step 7: I have chosen "VM CPU Usage (%)" and then set the condition and warning percentage.
Step 8: Next click on the "Actions” tab and the press the "Add” push button.
Step 9: Click on and choose an action. I have selected "Send a notification email” and then entered my email address.
Step 10: Then I’ve selected "Once" for the reoccurrence.
Step 11: Click OK and you’re done!