Daemons

The Meridian service is composed of several daemon "sub-services" that each perform a specific set of tasks. They can be enabled/disabled via ${OPENNMS_HOME}/etc/service-configuration.xml.

See the system administration section for details on sending daemon reload commands.

List of daemons

Name Description

Ackd

Acknowledge daemon is responsible for alarm acknowledgment.

Actiond

Generates Java actions based on events received.

Alarmd

Alarm daemon handles the alarm workflows.

AsteriskGateway

Communicates with an Asterisk server for VOIP notification.

Bsmd

Business Service Monitoring

Collectd

Collect daemon is responsible for collecting data from nodes.

Correlator

Associate multiple, related events.

Discovery

The Discovery daemon provides network discovery functions to scan once or regularly for nodes that should be added into the OpenNMS database.

EnhancedLinkd

Enhanced link daemon (Enlinkd) discovers connections between nodes using data generated by various link discovery protocols and accessible via SNMP.

EventTranslator

The Event Translator (ET) can transform and enhance the data from OpenNMS events that other daemons generate.

Eventd

Receives and writes event information.

JettyServer

The Jetty server provides the Meridian web user interface.

KarafStartupMonitor

Manager

Notifd

Notification daemon can send notifications to other systems based on event UEIs.

PassiveStatusd

PerspectivePoller

Pollerd

Poller daemon is responsible for the service availability monitoring.

Provisiond

The provision daemon handles the node import and service detection processes.

Queued

Reportd

Report daemon generates reports.

Rtcd

The Real Time Console daemon handles uptime percentage calculations.

Scriptd

Scriptd allows the user to configure Bean Shell script to run in response to events.

SnmpPoller

Checks SNMP interface admin status. Separate from Pollerd’s SnmpMonitor.

Statsd

Syslogd

A syslog daemon that allows retrieval and parsing of syslog messages to generate events.

Telemetryd

The Telemetry daemon collects sensor data sent from nodes to Meridian.

TestLoadLibraries

Ticketer

The ticketing integration lets Horizon create trouble tickets in external systems.

Tl1d

Enables reception of TL1 autonomous messages.

Trapd

Trap daemon provides an SNMP server that accepts SNMP traps that can be converted to events.

Vacuumd

Vacuum daemon takes care of cleaning processes in the PostgreSQL database.