1. Mapping ETSI NFV & Ceilometer alarms
A first analysis v2

2. Intro
This slide kit compares the alarm types and alarm notifications for virtualized resources as defined in ETSI NFV IFA and Openstack Ceilometer (as found on web)
The purpose is to find gaps and propose changes in NFV specifications and/or in Ceilometer.

3. Alarm types and notifications
ETSI NFV defines an alarm type and two notifications, one carrying the new alarm, the other just the alarm state change
Ceilometer also defines and alarm type but just one notification

4. Get Alarm List Operation
ETSI NFV Get Alarm List request
Ceilometer Get Alarm request
GetAlarmList (filter)
GET v2/alarms?query
ETSI NFV Get Alarm List response
Ceilometer Get Alarm request
0..N alarm type
List of alarm type OK

5. Alarm Type ETSI NFV Alarm Type Ceilometer Alarm Type alarmID Alarm_Id-
Alarm_Name
resourceID
Project_Id
alarmRaisedTime
alarmState: New, Updated, Cleared
State: ok, alarm, insufficient data
vrPerceivedSeverity: Critical, Major, Minor, Warning
Severity: low, moderate, critical
eventTime (unclear?)
state_timestamp
faultType ?
probableCause
Description
isRootCause
correlatedAlarmID
faultDetails

6. Subscribe Notifications operation
ETSI NFV Subscribe request
Ceilometer Subscribe request
Subscribe (filter) -
ETSI NFV Subscribe response
Ceilometer Get Alarm request
Subscription Id -
NFV: Default behavior with empty filter should be defined. Should be all alarms of the tenant resources or all alarms
NFV: The use of subscription id is unclear.
Ceilometer: Lacks subscription operation.
Zaqar provides north bound notification sand has subscriptions in the roadmap, but would need to be integrated with Ceilometer

7. Alarm Notification ETSI NFV VirtualisedResourceAlarmNotification
Ceilometer Notification
alarmID
Alarm_Id
Alarm_Name
resourceID -
alarmRaisedTime
alarmState
Current & Previous state
vrPerceivedSeverity
eventTime
faultType
probableCause
isRootCause
Reason

8. Alarm State Change Notification
ETSI NFV VirtualisedResourceAlarmStateChangedNotification
Ceilometer Notification
alarmID
Alarm_Id -
Alarm_Name
newState (==cleared)
Current, Previous Severity
Reason
OK, but NFV spec is ambiguous and needs an update