OpenNMS HORIZON uses notifications to make users aware of an event. Common notification methods are email and paging, but notification mechanisms also exist for:

  • Arbitrary HTTP GET and POST operations

  • Arbitrary external commands

  • Asterisk call origination

  • IRCcat Internet Relay Chat bot

  • SNMP Traps

  • Slack, Mattermost, and other API-compatible team chat platforms

  • Twitter, GNU Social, and other API-compatible microblog services

  • User-provided scripts in any JSR-223 compatible language

  • XMPP

The notification daemon Notifd creates and sends notifications according to configured rules when selected events occur in OpenNMS HORIZON.