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Manage an audit logs storage integration

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The Sigma Audit Logs connection stores entries for 30 days by default, but you can retain audit log data for extended periods by exporting it to cloud storage. To ensure secure, scalable, and compliant exports, set up an audit log storage integration using role-based access control (RBAC) with appropriate permissions.

This document explains how to create, update or delete a storage integration for exporting audit log data to an Amazon S3 bucket, Azure container, or Google Cloud Storage (GCS) bucket. For more information about audit logging with Sigma, see the following:

User requirements

The ability to create and edit audit log storage integrations requires the following:

  • You must be assigned the Admin account type in Sigma.
  • You must be granted administrative permissions in Amazon Web Services (AWS), Microsoft Azure, or Google Cloud (GCP).

Understanding the storage integration requirements

Sigma’s audit log data is provided by a Sigma-managed Snowflake connection. Therefore, the audit log storage integration creates an interface between Snowflake and your cloud storage platform. The integration, however, does not require your organization to maintain its own Snowflake account, and no part of the following procedures requires configuration within Snowflake.

Much of the storage integration configuration involves completing steps within your cloud storage platform. As these workflows are maintained and updated by a third party, the steps detailed in this document may differ from the cloud storage platform’s current UI and terminology.

Configure a storage integration to access AWS

To configure a storage integration that allows Sigma to write audit log data to AWS, you must complete the following procedures:

Create an Identity and Access Management (IAM) policy in AWS

Refer to the AWS documentation on Creating IAM policies. The following is an example JSON policy (with bucket name and folder path prefix placeholders) that meets the Snowflake requirements. 

   {
       "Version": "2012-10-17",
       "Statement": [
           {
               "Action": [
                   "s3:ListBucket",
                   "s3:GetBucketLocation"
               ],
               "Effect": "Allow",
               "Resource": "arn:aws:s3:::{{bucket}}",
               "Condition": {
                   "StringLike": {
                       "s3:prefix": [
                           "{{prefix}}/*"
                       ]
                   }
               }
           },
           {
               "Action": [
                   "s3:PutObject",
                   "s3:DeleteObject"
               ],
               "Effect": "Allow",
               "Resource": "arn:aws:s3:::{{bucket}}/{{prefix}}/*"
           }
       ]
   }

📘

You're not required to specify a folder path prefix if the role can upload files to any destination in the S3 bucket.

Create a custom IAM role in AWS

This IAM role must be created before adding an AWS integration in Sigma as certain AWS credentials are needed to add the integration. Refer to the AWS documentation on how to Create an IAM role. When creating the IAM role, ensure that your configurations match these requirements for the integration with Sigma:

  • When prompted for an Account ID, you should use your AWS account ID as a temporary value. After you add an AWS integration in Sigma, you must update the IAM role to modify the trusted relationship and grant access to Snowflake.
  • When creating the role, ensure you select Require external ID.
  • When prompted for an external ID, enter a placeholder value (for example, 0000). Sigma generates an external ID when you add an AWS integration, after which you must update the IAM role.
  • When selecting permissions, use the IAM policy you just created.

Add an AWS integration in Sigma

  1. Go to Administration > Account > General Settings.

  2. In the Audit Logging section, locate the Create an Audit Logs Storage Integration setting and click Add.

    📘

    If the General Settings tab doesn’t include an Audit Logging section, contact Support or your Sigma Account Executive to enable it for your organization.

  3. In the Create a storage integration for audit logs modal, provide the AWS credentials:

    1. In the Cloud Storage section, select the AWS option.

    2. In the Destination field, enter the S3 destination folder path that includes the bucket and folder path prefix specified in the IAM policy.

    3. In the Role ARN field, enter the Role ARN value recorded for the IAM role.

    4. Click Create storage integration.

  4. Sigma sends a confirmation email when the storage integration is successfully created and an Amazon Resource Name (ARN) is available for the IAM user. When this occurs, return to the Administration portal to record the credentials for an upcoming step in the integration configuration process:

    1. Go to the Account > General Settings tab.

    2. In the Audit Logging section, locate the Create an Audit Logs Storage Integration setting and click View credentials.

    3. Reference the Sigma credentials section and record the External ID and IAM User ARN values.

Update the custom IAM role in AWS

Refer to the AWS documentation on Editing the trust relationship for an existing role. When editing the trust policy document, use the External ID and IAM User ARN values recorded in Sigma. Your JSON configuration may look like:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "AWS": "<iam_user_arn>"
            },
            "Action": "sts:AssumeRole",
            "Condition": {
                "StringEquals": {
                    "sts:ExternalId": "<external_id>"
                }
            }
        }
    ]
}

To schedule a recurring audit log export, see Export audit log data to cloud storage.

Configure a storage integration to access Azure

To configure a storage integration that allows Sigma to write audit log data to Azure, you must complete the following procedures:

Add an Azure integration in Sigma

  1. Go to Administration > Account > General Settings.

  2. In the Audit Logging section, locate the Create an Audit Logs Storage Integration setting and click Add.

    📘

    If the General Settings tab doesn’t include an Audit Logging section, contact Support or your Sigma Account Executive to enable it for your organization.

  3. In the Create a storage integration for audit logs modal, provide the Azure credentials:

    1. In the Cloud Storage section, select the Azure option.

    2. In the Destination field, enter a path containing the names of the account, container, and the blob. Use the following syntax: azure://accountname.blob.core.windows.net/containername/blobname. The path should begin with azure://, not https://.

    3. In the Tenant ID field, enter your organization’s Azure account tenant ID.

      📘

      For guidance on finding your tenant ID, refer to How to find your Microsoft Entra tenant ID in Microsoft’s documentation.

    4. Click Create storage integration.

  4. Sigma sends a confirmation email when the storage integration is successfully created and the Azure consent URL and multi-tenant app name are available. When this occurs, return to the Administration portal to record the credentials for an upcoming step in the integration configuration process:

    1. Go to the Account > General Settings tab.

    2. In the Audit Logging section, locate the Create an Audit Logs Storage Integration setting and click View credentials.

    3. Record the Azure Consent URL and Azure Multi Tenant App Name values.

Accept requested permissions

  1. Go to the URL specified by the Azure Consent URL value recorded in Sigma.

  2. In the Microsoft permissions request page, click Accept to grant the Snowflake service principal an access token on specified resources inside your tenant. The page redirects to the Snowflake website.

Continue to Add role assignment in Azure .

Add role assignment in Azure

Refer to the Azure documentation on how to assign Azure roles.

When assigning roles, ensure that your configurations match these requirements for the integration with Sigma:

  • Sigma requires that you select the Storage Blob Data Contributor role option.
  • When selecting members, enter the Azure Multi Tenant App Name value (only the characters preceding the underscore) recorded in Sigma to search for the member.

📘

As it may take up to 45 minutes for Azure to process the role assignment, exports may not work immediately.

To schedule a recurring audit log export, see Export audit log data to cloud storage.

Configure a storage integration to access GCP

To configure a storage integration that allows Sigma to write audit log data to GCP, you must complete the following procedures:

Add a GCP integration in Sigma

  1. Go to Administration > Account > General Settings.

  2. In the Audit Logging section, locate the Create an Audit Logs Storage Integration setting and click Add.

    📘

    If the General Settings tab doesn’t include an Audit Logging section, contact Support or your Sigma Account Executive to enable it for your organization.

  3. In the Create a storage integration for audit logs modal, provide the GCP credentials:

    1. In the Cloud Storage section, select the GCP option.

    2. In the Destination field, enter the GCS destination folder path.

    3. Click Create storage integration.

  4. Sigma sends a confirmation email when the storage integration is successfully created and the service account credential is available. When this occurs, return to the Administration portal to record the credentials for an upcoming step in the integration configuration process:

    1. Go to the Account > General Settings tab.

    2. In the Audit Logging section, locate the Create an Audit Logs Storage Integration setting and click View credentials.

    3. Reference the Sigma credentials section and record the Service account value.

    📘

    Sigma doesn’t currently support the ability to delete audit logs storage integrations through the Administration portal. If you need to delete an existing integration, please contact Support.

Create a custom IAM role in GCP

Refer to the Google Cloud documentation on creating and managing custom roles. When creating the role, the following permissions need to be selected:

  • storage.objects.create
  • storage.objects.delete
  • storage.objects.list
  • storage.buckets.get

Assign the custom IAM role in GCP

Refer to the Google Cloud documentation on authorizing access with IAM.

  • When prompted to fill the New principals field, search for and select the Service account value from Sigma.
  • When selecting a role, select the custom IAM role created for the audit log storage integration.

To schedule a recurring audit log export, see Export audit log data to cloud storage.

Update an audit log storage integration destination

If you're updating the audit log storage integration to a destination within your current cloud provider, follow the steps in this section. If you want to update existing audit log storage integration destination to a different cloud provider, you must first delete your storage integration and then configure a new storage integration.

  1. Select Administration, then Account.

  2. Under Audit Logging , select View credentials.

  3. Select Edit Destination.

  4. Under Destination, enter the your desired storage integration destination. Select Save.

  5. If you have scheduled exports linked to this storage integration, you can view them by selecting Linked scheduled exports. All scheduled exports will be paused by default. To update the export destination to your new storage integration location, select the Update export destination for all linked scheduled exports instead of pausing checkbox.

  6. Once your integration destination has been successfully updated, you will see a Cloud destination updated pop-up. You will also receive a confirmation email.

Delete an audit log storage integration

To delete your audit log storage integration:

  1. Select Administration, then Account.

  2. Under Audit Logging , select View credentials.

  3. Select Delete integration.

    🚧

    Deleting a storage integration cannot be undone. Once a storage integration is deleted, all scheduled exports linked to the integration will be paused by default.

  4. If you have scheduled exports linked to this storage integration, you can view them by selecting Linked scheduled exports. To delete all scheduled exports, select the Delete all linked scheduled exports checkbox.

  5. Select Delete integration.

  6. Once your integration has been successfully deleted, you will see an Integration deleted pop-up. You will also receive a confirmation email.

Updated 1 day ago

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