Quick checklist of message Subjects for nas, alarm_enrichment and alarm_routing_service probes

Document ID : KB000009822
Last Modified Date : 14/02/2018
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Introduction:

Quick checklist of message Subjects for nas, alarm_enrichment and alarm_routing_service probes

Background:

Due to the addition of some new probes and probe functionality for UIM messaging, here is a quick checklist of message Subjects for nas, alarm_enrichment and alarm_routing_service probes for reference.

Environment:
UIM 8.31 or higher
Instructions:

Quick checklist for message queue Subject names for nas and alarm_enrichment probes' with NO EMS installed:

 

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1. alarm_enrichment probe uses a Subject of alarm

2. nas probe uses a Subject of alarm2

So by default, the alarm_enrichment probe uses the "alarm" Subject and forwards messages to the "alarm2" subject for the nas probe.

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Before ems deployment, alarm messages flow through the CA UIM environment in the following manner:

- probes and the baseline_engine send alarm messages with the subject "alarm".

- The alarm_enrichment probe receives the alarm messages, enriches them with user-defined data, then changes the alarm message subject to "alarm2".

- The nas probe receives the alarm2 message and performs further alarm processing.

 

During the process of ems deployment and configuration:

The Alarm Routing Service is installed as a service within the trellis probe. The Alarm Routing Service performs the following tasks:

         - Selectively routes alarm messages to either ems or nas.

        - Duplicates any alarm messages that are sent to both ems and nas.

nas routing is modified. The alarm_enrichment probe is reconfigured to listen for the alarm message subject "alarm1".  The enrichment_subject key in the nas configuration file (nas.cfg) controls this behavior. By default, the nas probe continues to receive all legacy alarm messages until alarm routing is configured.

Note: Probes that send ems events natively do not require conversion or alarm routing.

ems routing is established. Once ems is deployed and routing rules are created, legacy alarm messages are sent to the Legacy Alarm Manager (LAM). The alarm messages are then converted into ems events.

 

Quick checklist for message queue Subject names for nas and alarm_enrichment probes' WITH EMS installed (post deployment of EMS)

 

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1. alarm_enrichment probe uses a Subject of alarm1

2. nas probe continues to use a Subject of alarm2 (no change)

3. alarm_routing_service uses a Subject of alarm

IMPORTANT: Note that if the message queue Subject name is changed, the content in the queues will be lost.

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WARNING: If you decide to Remove/Uninstall ems from the primary hub, for complete details consult this help doc page first:

https://docops.ca.com/ca-unified-infrastructure-management-probes/en/alphabetical-probe-articles/ems-event-management-service/ems-probe-deployment-and-configuration#emsProbeDeploymentandConfiguration-UninstallorReinstalltheemsProbeuninstall_ems

 

Post-removal/uninstall of ems, the alarm message Subjects used should be:

 

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1. alarm_enrichment probe: Change the enrichment_subject key via Raw Configure mode from "alarm1" to "alarm"

2. nas probe continues to use a Subject of alarm2 (no change)

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