Daemons

The Horizon 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	Collects data from nodes to persist performance metrics over time.
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 Horizon web user interface.
Karaf	The Karaf runtime is the framework that maintains all the other daemons running within the Horizon system.
KarafStartupMonitor	Used in startup script to detect if Karaf started properly.
Notifd	Notification daemon can send notifications to other systems based on event UEIs.
PassiveStatusd	The Passive Status Keeper provides a mechanism to generate service outages based on events. This can be helpful for devices that cannot be directly polled to check service state.
PerspectivePoller	Handles Application Perspective Monitoring availability calculations.
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	Generates statistical reports from node data.
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 Horizon.
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.

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

Collects data from nodes to persist performance metrics over time.

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 Horizon web user interface.

Karaf

The Karaf runtime is the framework that maintains all the other daemons running within the Horizon system.

KarafStartupMonitor

Used in startup script to detect if Karaf started properly.

Notifd

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

PassiveStatusd

The Passive Status Keeper provides a mechanism to generate service outages based on events. This can be helpful for devices that cannot be directly polled to check service state.

PerspectivePoller

Handles Application Perspective Monitoring availability calculations.

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

Generates statistical reports from node data.

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 Horizon.

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.