I created an alarm for vim.event.VmRemovedEvent, but not triggered

[pengqiaojun]

I created an alarm monitor the virtual machine is removed.Alarm is created successfully, but can not be triggered. And in the same way to create an alert to monitor the virtual machine is created,it will be triggered.How can I through the alarm to monitor the virtual machine to be deleted?
my code like this:
` service_instance = get_service_instance()
content = service_instance.content
folder = content.rootFolder
expression = vim.alarm.EventAlarmExpression(eventType=eventType, eventTypeId='vim.event.{0}'.format(str(eventType._wsdlName)), objectType=vim.VirtualMachine, status='yellow')

action = vim.alarm.AlarmTriggeringAction(
            action=vim.action.RunScriptAction(script='/bin/sh /opt/alarm.sh'),
            transitionSpecs=[vim.alarm.AlarmTriggeringAction.TransitionSpec(startState='green',finalState='yellow',repeats=False)],
            green2yellow=True, yellow2red=False, red2yellow=False, yellow2green=False)

setting = vim.alarm.AlarmSetting(toleranceRange=0, reportingFrequency=0)

spec = vim.alarm.AlarmSpec(name='alarm_to_smc_{0}'.format(name),
                            description='create alarms by python api: {0}'.format(name),
                            enabled = True, actionFrequency = 0,
                            expression = expression,
                            action = action,
                            setting = setting)

this_alarm = service_instance.content.alarmManager.CreateAlarm(entity=folder, spec=spec)

`

[MONSTERdemo]

@pengqiaojun Hi, I want to creat a new alarm,but I don't know how to use the eventType. Could you give me an exmple? Thanks?