Heatmap

Use the heatmap either to display unacknowledged alarms or to display ongoing outages of nodes. You can apply each of these visualizations to categories, foreign sources, or node services. The sizing of an entity is calculated by counting the services inside the entity. Thus, a node with fewer services will appear in a smaller box than a node with more services.

The feature is by default deactivated and is configured through opennms.properties.

Heatmap visualizations of alarms

heatmap

Table 1. Heatmap dashboard configuration properties
Name	Type	Description	Default
`org.opennms.heatmap.defaultMode`	String	There exist two options for using the heatmap: `alarms` and `outages`. This option configures which are displayed per default.	`alarms`
`org.opennms.heatmap.defaultHeatmap`	String	This option defines which heatmap is displayed by default. Valid options are `categories`, `foreignSources` and `monitoredServices`.	`categories`
`org.opennms.heatmap.categoryFilter`	String	The following option is used to filter for categories to be displayed in the heatmap. This option uses the Java regular expression syntax. The default is `.*` so all categories will be displayed.	`.*`
`org.opennms.heatmap.foreignSourceFilter`	String	The following option is used to filter for foreign sources to be displayed in the heatmap. This option uses the Java regular expression syntax. The default is `.*` so all foreign sources will be displayed.	`.*`
`org.opennms.heatmap.serviceFilter`	String	The following option is used to filter for services to be displayed in the heatmap. This option uses the Java regular expression syntax. The default is `.*` so all services will be displayed.	`.*`
`org.opennms.heatmap.onlyUnacknowledged`	Boolean	This option configures whether only unacknowledged alarms will be taken into account when generating the alarm-based version of the heatmap.	`false`
`org.opennms.web.console.centerUrl`	String	You can also place the heatmap on the landing page by setting this option to `/heatmap/heatmap-box.jsp`.	`/surveillance-box.jsp`

You can use negative lookahead expressions for excluding categories you wish not to be displayed in the heatmap, e.g. by using an expression like ^(?!XY).* you can filter out entities with names starting with XY.