Azure Event Grid System Topic discovery with Patterns

  • Release version: Yokohama
  • Updated June 16, 2026
  • 2 minutes to read
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    Summary of Azure Event Grid System Topic Discovery with Patterns

    The Azure Event Grid System Topic discovery pattern in ServiceNow’s Discovery and Service Mapping Patterns application enables automatic detection and inventory of Azure Event Grid System Topics in your cloud environment. This pattern helps populate detailed resource data into both CMDB and non-CMDB tables, providing comprehensive visibility into Azure Event Grid resources.

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    To leverage this capability, customers must meet Azure discovery prerequisites, enable the relevant discovery pattern (which is disabled by default), and configure discovery schedules appropriately, especially for Azure GovCloud accounts.

    Key Features

    • Pattern Activation: Starting with Visibility Content version 6.28.0, enabling or disabling this pattern no longer counts as a customization, ensuring smooth updates while retaining user preferences after upgrades.
    • Azure GovCloud Support: Discovery requires using specific datacenter URLs when setting up Azure service accounts to successfully discover Azure GovCloud (US) resources.
    • Data Population: The pattern populates data in two types of tables:
      • Non-CMDB Table (cmdbazureeventgridsystemtopic): Stores detailed attributes of the Event Grid System Topics, such as kind, provisioning state, resource group, subscription and tenant IDs, topic type, and linkage to the Cloud Messaging Service CI.
      • CMDB Table (cmdbcicloudmessagingservice): Captures core configuration items with fields like install status, location, name, object ID, operational status, and resource type (set as microsoft.eventgrid/systemtopics).
    • CI Relationships: The pattern establishes relationships among discovered configuration items, including:
      • Resource Group contains the Cloud Messaging Service CI
      • Cloud Messaging Service CI is hosted on an Azure Datacenter CI
      • Event Grid System Topic references the Cloud Messaging Service CI
    • Azure Tag Collection: Tags from Azure resources are collected and stored in the cmdbkeyvalue table, enabling tag-based filtering and reporting.

    Practical Considerations for ServiceNow Customers

    • Ensure you have the latest version of the Discovery and Service Mapping Patterns application from the ServiceNow Store to support Azure Event Grid System Topic discovery.
    • Activate the Azure - Event Grid System Topic pattern to enable discovery; be aware this pattern is disabled by default.
    • Configure discovery schedules to accommodate special cases like Azure GovCloud by specifying appropriate datacenter URLs.
    • Review both CMDB and non-CMDB tables to access comprehensive data about Event Grid System Topics and their related messaging services.
    • Use CI relationships to understand dependencies and resource hierarchies within your Azure environment.
    • Leverage collected tags for enhanced configuration management and reporting capabilities.

    Discovery and Service Mapping Patterns finds Azure services on your cloud environment. Discovering some of these resources may require updating to the latest version of the Discovery and Service Mapping Patterns application from the ServiceNow Store.

    Pattern-based discovery and mapping requirements

    Verify the Microsoft Azure discovery prerequisites
    For more information, see the prerequisites section in Microsoft Azure Cloud components discovery using patterns.
    Enable the relevant pattern
    The pattern for this service is disabled by default. Starting with Visibility Content version 6.28.0, activating or deactivating a pattern won't be considered a customization, and it will continue to receive updates. Patterns that were previously activated or deactivated will reset to the latest predefined version after upgrading while retaining the last active field value. For more information on enabling patterns, see Activate a disabled pattern.
    Configure the Discovery schedule to support GovCloud
    Discovering Azure GovCloud (US) accounts requires using a datacenter URL when setting up an Azure service account. For more information, see Set up Azure service accounts.

    Discovery and Service Mapping Patterns application populates data in both CMDB and non-CMDB tables.

    Data stored in non-CMDB tables

    Discovery and Service Mapping Patterns application populates data in the non-CMDB table when running the Azure - Event Grid System Topic - Extended Inventory(LP) pattern.

    You can review the non-CMDB Azure tables by navigating to All > Configuration > Azure. You can also search the navigation filter for the specific pattern name.

    Table 1. Azure Event Grid - System Topic [cmdb_azure_event_grid_system_topic]
    Field Description
    Kind [kind] The specific kind or stock keeping unit (SKU) of the resource, detailing its capabilities or configuration.
    Metric Resource Id [metric_resource_id] The identifier used for accessing metrics related to the resource.
    Object Id [object_id] The unique identifier of the resource within Azure.
    Provisioning State [provisioning_state] The current status of the resource's provisioning process.
    Resource Group [resource_group] Name of the resource group.
    Subscription Id [subscription_id] The subscription ID.
    Tenant Id [tenant_id] The unique identifier for the Azure Active Directory tenant.
    Topic Type [topic_type] The category or type of the event topic.
    Configuration Item [configuration_item] References the Cloud Messaging Service [cmdb_ci_cloud_messaging_service] table.

    Data stored in CMDB tables

    Discovery and Service Mapping Patterns application populates data in the CMDB when running the Azure - Event Grid System Topic - Extended Inventory(LP) pattern.

    Table 2. Cloud Messaging Service [cmdb_ci_cloud_messaging_service]
    Field Description
    Install Status [install_status] Install status of the resource. Default value is Installed.
    Location [location] The geographical region where the resource is hosted.
    Name [name] The name of the resource.
    Object ID [object_id] The unique identifier of the resource within Azure.
    Operational status [operational_status] Operational status of the resource. Default value is Operational.
    Type [type] Type of resource. The value is set to microsoft.eventgrid/systemtopics.

    CI relationships

    The pattern creates these relationships to support discovery.

    CI Relationship CI
    Resource Group [cmdb_ci_resource_group] Contains::Contained by Cloud Messaging Service [cmdb_ci_cloud_messaging_service]
    Cloud Messaging Service [cmdb_ci_cloud_messaging_service] Hosted on::Hosts Azure Datacenter [cmdb_ci_azure_datacenter]
    Azure Event Grid - System Topic [cmdb_azure_event_grid_system_topic] References Cloud Messaging Service [cmdb_ci_cloud_messaging_service]

    Azure tag discovery

    The pattern collects tags and populates them in the Key Value [cmdb_key_value] table.
    Table 3. Key Value [cmdb_key_value]
    Field Description
    Key [key] Tag name.
    Value [value] Tag value.