Azure Event Grid System Topic discovery with Patterns

  • Release version: Zurich
  • Updated July 31, 2025
  • 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 within the Discovery and Service Mapping Patterns application enables ServiceNow customers to identify and map Azure Event Grid System Topics in their cloud environments. This discovery enhances visibility into Azure services by populating relevant configuration data into both CMDB and non-CMDB tables, supporting accurate asset and service management.

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    Key Features

    • Pattern Activation: The Azure Event Grid System Topic pattern is disabled by default. Starting with Visibility Content version 6.28.0, enabling or disabling patterns no longer counts as a customization and patterns reset to the latest version upon upgrade while preserving activation status.
    • Discovery Prerequisites: Customers must meet Microsoft Azure discovery prerequisites, including setting up Azure service accounts correctly, especially for GovCloud (US) environments which require specific datacenter URLs.
    • Data Storage:
      • Non-CMDB Tables: Extended inventory data for Azure Event Grid System Topics is stored here (e.g., cmdbazureeventgridsystemtopic table) and can be reviewed via the ServiceNow navigation.
      • CMDB Tables: Core configuration items for Cloud Messaging Services related to Event Grid topics are stored in the CMDB (cmdbcicloudmessagingservice table), ensuring integration with ServiceNow's CMDB framework.
    • CI Relationships: The pattern automatically creates relationships linking Event Grid System Topics to their Azure Resource Groups, Cloud Messaging Services, and Azure Datacenters, fostering a comprehensive service model.
    • Azure Tag Discovery: Tags associated with Azure resources are collected and stored in the cmdbkeyvalue table, allowing for enhanced filtering and categorization.

    Practical Application for ServiceNow Customers

    By enabling and configuring this discovery pattern, customers can automatically discover Azure Event Grid System Topics and related resources, populate detailed and structured data into their CMDB and supporting tables, and maintain up-to-date relationships for accurate service mapping. This supports operational management, compliance, and cloud governance efforts by providing a real-time view of critical Azure messaging services within the ServiceNow platform.

    To implement this discovery, customers should ensure they:

    • Meet the Azure discovery prerequisites including correct service account setup.
    • Activate the Azure Event Grid System Topic discovery pattern following the updated activation policies.
    • Configure discovery schedules to accommodate specific environments like Azure GovCloud.
    • Review discovered data in both CMDB and non-CMDB tables for validation and operational use.

    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 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.