Azure Event Grid System Topic discovery with Patterns

  • Release version: Xanadu
  • 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 with Patterns enables ServiceNow customers to automatically detect and map Azure Event Grid System Topics within their cloud environments. This functionality is part of the Discovery and Service Mapping Patterns application, which requires specific prerequisites and pattern activation to function properly. It supports comprehensive data collection for CMDB and non-CMDB tables, helping to maintain accurate cloud service inventories.

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    Key Features

    • Pattern-Based Discovery: Uses the Azure - Event Grid System Topic - Extended Inventory(LP) pattern to discover system topics, requiring activation as it is disabled by default.
    • Data Population: Discovers and populates detailed resource data into both CMDB tables (such as cmdbcicloudmessagingservice) and non-CMDB tables (such as cmdbazureeventgridsystemtopic), enabling enriched configuration management.
    • Support for Azure GovCloud: Requires specific configuration of Azure service accounts using datacenter URLs to discover Azure GovCloud (US) environments.
    • Tag Collection: Automatically collects Azure resource tags and stores them in the Key Value (cmdbkeyvalue) table for enhanced resource categorization and reporting.
    • CI Relationships: Establishes critical relationships among discovered Configuration Items (CIs), such as linking system topics to resource groups, cloud messaging services, and Azure datacenters, improving service dependency visibility.
    • Upgrades and Customization Handling: Starting with Visibility Content version 6.28.0, pattern activation or deactivation is preserved during upgrades without being treated as customization, ensuring consistent discovery behavior.

    Practical Considerations for ServiceNow Customers

    • Ensure Prerequisites: Verify Microsoft Azure discovery prerequisites are met as outlined in the Microsoft Azure Cloud components discovery documentation.
    • Activate Relevant Patterns: Enable the Azure Event Grid System Topic discovery pattern to initiate resource discovery.
    • Configure Discovery Schedules: Adjust schedules accordingly, especially when discovering resources in Azure GovCloud environments to ensure connectivity and data accuracy.
    • Review Discovered Data: Access discovered resources via both CMDB and non-CMDB tables to get a comprehensive view of Event Grid System Topics and their associated cloud messaging services.
    • Leverage CI Relationships and Tags: Use established relationships and collected tags to improve impact analysis, service mapping, and cloud asset management.

    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.