Jonathan Hurley created AMBARI-8400: ---------------------------------------
Summary: Alerts: Template Engine for Dispatching Key: AMBARI-8400 URL: https://issues.apache.org/jira/browse/AMBARI-8400 Project: Ambari Issue Type: Bug Reporter: Jonathan Hurley Ambari's various dispatchers (such as Email and SNMP) can benefit from having a mechanism where a template can be defined for the construction of notification data. This decouples the content that Ambari is sending from the logic to compute the aggregate alerts. Apache Velocity is a good choice for this requirement as it includes a maturing template language, VTL. A single XML file that ships with Ambari will contain the default templates for known alert target types. There will be an option to override the use of this file with a user-specified location via ambari.properties. In the event that a user-specific XML file cannot be parsed, appropriate exceptions will be thrown, but the {{AlertNoticeDispatchService}} will attempt to gracefully fallback on other content rendering options (such as the internal XML file). The following data should be exposed to VTL: - a list of all alert changes -- alert name, state, date, label -- a list for each state change -- lists for all alerts, broke down by service and state - a list of all services with an alert - a list of all hosts with an alert - total counts of changes separated -- one count for each alert state -- This message was sent by Atlassian JIRA (v6.3.4#6332)