Extend built-in unified analysis pages

If your extension supplies additional data for a default entity with its own unified analysis page, you can extend the page using card injections. Examples of built-in unified analysis pages are the new host overview page or any unified analysis Kubernetes page. Card injections are available since Dynatrace version 1.233.

Define card injection

The configuration of a card injection is similar to the configuration of the page layout itself with one significant modification: injected cards are ordered alphabetically by their key, which should use a well-specified key prefix. This ensures that unrelated data supplied by different extensions won't be mixed on a unified analysis page. Injections can be added under the detailsInjections and listInjections sections of the screen configuration.

yaml
detailsInjections:
      - type: CHART_GROUP
        key: my-host-feature-windows-only-chart
        conditions:
          - entityAttribute|osType=WINDOWS
      - type: CHART_GROUP
        key: my-host-feature-chart1
      - type: CHART_GROUP
        key: my-host-feature-chart2
      - type: CHART_GROUP
        key: my-host-feature-process-chart
        entitySelectorTemplate: type(PROCESS_GROUP_INSTANCE), fromRelationships.isProcessOf($(entityConditions))
        width: HALF_SIZE

The following options are available for a card supplied by your extension:

type: Card type available to be supplied to a unified analysis page. Supported types include CHART_GROUP, ENTITIES_LIST, EVENTS, LOGS, and MESSAGE.
key: Unique card key used to reference the desired card configuration. Use a well-specified key prefix to ensure that related cards are placed properly on a page. Cards are sorted alphabetically based on key.
entitySelectorTemplate: An entity selector that is used to reference cards from another monitored entity type. For more information, see Environment API v2 - Entity selector.
Details
It can serve multiple purposes—selecting the entity where the chart will be displayed and filtering them based on certain rules or relating entities. It is used in conjunction with entityType to further refine which entities are applicable for the card. For example, if entityType is HOST, you can use entitySelectorTemplate to show the card only for hosts using a certain operating system.
$entityConditions acts as a dynamic placeholder, adapting to the context in which the card appears. For example, when the card is displayed on a page dedicated to a specific host, $entityConditions will automatically adjust to conditions applicable to that host.
For example, when the card with the following configuration is displayed on the host page.
```
yaml
"entitySelectorTemplate": "type(NETWORK_INTERFACE) AND fromRelationships.isNetworkInterfaceOf($(entityConditions))"
```
The $(entityConditions) placeholder will be automatically replaced to point to the specific host entity.
```
yaml
"entitySelectorTemplate": "type(NETWORK_INTERFACE) AND fromRelationships.isNetworkInterfaceOf(type(HOST) AND entityId(HOST-<id>))"
```
width: Determines how wide that card is in relation to the page width. Supported values are HALF_SIZE and FULL_SIZE.
conditions: A list of conditions that need to be fulfilled for the card to be visible.

Reference card injection

As a final step, you need to reference the card to be injected on a built-in unified analysis page with an Extensions 2.0 package and place it in your extension.yaml file in the screens section. In this example, we extend the built-in host overview page (entityType: HOST).

yaml
name: custom:com.ua.example.extension
version: 1.0.0
minDynatraceVersion: 1.233.0
author:
  name: StackEnterprise

# Here comes your usual extension YAML content: data source, declarative metrics, topology, etc.

screens:
  - entityType: HOST
    detailsInjections:
      - type: CHART_GROUP
        key: my-host-feature-windows-only-chart
        conditions:
          - entityAttribute|osType=WINDOWS
      - type: CHART_GROUP
        key: my-host-feature-chart1
      - type: CHART_GROUP
        key: my-host-feature-chart2
      - type: CHART_GROUP
        key: my-host-feature-process-chart
        entitySelectorTemplate: type(PROCESS_GROUP_INSTANCE), fromRelationships.isProcessOf($(entityConditions))
        width: HALF_SIZE
    chartsCards:
      - key: my-host-feature-windows-only-chart
        ...
      - key: my-host-feature-chart1
        ...
      - key: my-host-feature-chart2
        ...
  - entityType: PROCESS_GROUP_INSTANCE
    chartsCards:
      - key: my-host-feature-process-chart
        ...