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diff --git a/docs/requirements/05-implementation.rst b/docs/requirements/05-implementation.rst index 297f34a3..4c89fdf5 100644 --- a/docs/requirements/05-implementation.rst +++ b/docs/requirements/05-implementation.rst @@ -644,6 +644,90 @@ Parameters: resources. For each resource, information about the current state, the firmware version, etc. is provided. +NFV IFA, OPNFV Doctor and AODH alarms +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +This section compares the alarm interfaces of ETSI NFV IFA with the specifications +of this document and the alarm class of AODH. + +ETSI NFV specifies an interface for alarms from virtualised resources in ETSI GS +NFV-IFA 005 [ENFV]_. The interface specifies an Alarm class and two notifications plus +operations to query alarm instances and to subscribe to the alarm notifications. + +The specification in this document has a structure that is very similar to the +ETSI NFV specifications. The notifications differ in that an alarm notification +in the NFV interface defines a single fault for a single resource while the +notification specified in this document can contain multiple faults for +multiple resources. The Doctor specification is lacking the detailed time stamps +of the NFV specification essential for synchronizaion of the alarm list +using the query operation. The detailed time stamps are also of value in the event +and alarm history DBs. + +AODH defines a base class for alarms, not the notifications. This means that +some of the dynamic attributes of the ETSI NFV alarm type, like alarmRaisedTime, +are not applicable to the AODH alarm class but are attributes of in the actual +notifications. (Description of these attributes will be added later.) The AODH alarm +class is lacking some attributes present in the NFV specification, fault details +and correlated alarms. Instead the AODH alarm class has attributes for actions, +rules and user and project id. + + ++------------------------+------------------------+------------------------+ +| ETSI NFV Alarm Type | OPNFV Doctor Req Spec | AODH Alarm Type | ++========================+========================+========================+ +| AlarmId | FaultId | Alarm Id | ++------------------------+------------------------+------------------------+ +| managedObjectId | virtualResourceId | (N/A) | ++------------------------+------------------------+------------------------+ +| \- | \- | User_Id, Project_Id | ++------------------------+------------------------+------------------------+ +| alarmRaisedTime | \- | (N/A) | ++------------------------+------------------------+------------------------+ +| alarmChangedTime | \- | (N/A) | ++------------------------+------------------------+------------------------+ +| alarmClearedTime | \- | (N/A) | ++------------------------+------------------------+------------------------+ +| alarmState: | virtualResourceState | State: ok, alarm, | +| New, Updated, Cleared | (e.g. normal, | insufficient data | +| | maintenance, down, | | +| | error) | | ++------------------------+------------------------+------------------------+ +| vrPerceivedSeverity: | Severity (Integer) | Severity: low, | +| Critical, Major, Minor,| | moderate, critical | +| Warning, Indeterminate,| | | +| Cleared | | | ++------------------------+------------------------+------------------------+ +| eventTime (unclear?) | EventTime | (N/A) | ++------------------------+------------------------+------------------------+ +| faultType | FaultType | type | ++------------------------+------------------------+------------------------+ +| probableCause | ProbableCause | description | ++------------------------+------------------------+------------------------+ +| isRootCause | IsRootCause | \- | ++------------------------+------------------------+------------------------+ +| correlatedAlarmId | CorrelatedFaultId | \- | ++------------------------+------------------------+------------------------+ +| faultDetails | FaultDetails | \- | ++------------------------+------------------------+------------------------+ +| \- | \- | actions, rule, time | +| | | constraints | ++------------------------+------------------------+------------------------+ + + +Table: Comparison of alarm attributes + +The primary area of improvement should be alignment of the perceived severity. This +is important for a quick and accurate evaluation of the alarm. AODH thus should +support also the X.733 values Critical, Major, Minor, Warning and Indeterminate. + +The detailed time stamps (raised, changed, cleared) which are essential for +synchronizing the alarm list using a query operation should be added to the +Doctor specification. + +Other areas that need alignment is the so called alarm state in NFV. Here we must +however consider what can be attributes of the notification vs. what should be a +property of the alarm instance. This will be analyzed later. + Detailed southbound interface specification ------------------------------------------- @@ -733,6 +817,8 @@ message by using the 'events' wrapper as follows: } + + Blueprints ---------- |