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2015-08-24 07:37:21 -0500 answered a question Can we have multiple operators for combination alarms in Ceilometer?

It seems it is possible to create combination alarm with only one operator.

However, I tried to create using the two combination alarms and I am able to create the alarm but didn't check the behavior. In your case, first, create an combination alarm for alarm2 and alarm3 with AND operator, then create one more combine alarm with newly created combine alarm (alarm1 and combination alarm of alarm2 and alarm3) with OR operator.

Hope it works for you!!

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2015-08-21 00:13:16 -0500 answered a question instance Resize is not working

You need to perform the following actions:

  1. Update the “nova.conf” file in both controller and compute with the following lines:

      allow_migrate_to_same_host = True
      scheduler_default_filters = AllHostsFilter
      allow_resize_to_same_host = True
  2. Restart the following services of the "controller" node

    • nova-api

    • nova-cert

    • nova-consoleauth

    • nova-scheduler

    • nova-conductor

    • nova-novncproxy

  3. Restart the following service of the compute node:

    • nova-compute

2015-08-20 04:28:59 -0500 commented answer Create combination alarm using ceilometer API

Also, note that alarm_ids parameter is not there in threshold-alarm creation. You can see usage the example at the link: (

2015-08-20 04:25:38 -0500 commented answer Create combination alarm using ceilometer API

Actually, parameters we pass to the function makes the difference between the threshold-alarm and combination-alarm. In case of combination alarm, we need to provide the minimum of two alarm_ids and these alarm_ids parameter is indication to create combination alarm.

2015-08-20 02:44:14 -0500 answered a question Create combination alarm using ceilometer API

The same call cc.alarms.create(**fields) is used to create the ceilometer-combination-alarm. I am not sure is that your question? or you are looking for some other API to create the combination alarm?

2015-08-19 03:52:50 -0500 answered a question What parameters of a ceilometer threshold alarm be updated using ceilometer alarm-threshold-update?

Except the ALARM-ID, almost every parameter used to create the threshold alarm can be changed. There is no basic parameters criteria as such. User can change any of the parameter depends on his need.

$ ceilometer alarm-update --enabled False -a ALARM_ID

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2015-05-08 17:33:31 -0500 asked a question how to get current usage details of cinder volume?

Hi, Could you please help me to get the details of current usage of the particular volume? How much it is occupied and free etc. details? I am not able to find any CLI command either in Cinder and Ceilo meter.