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Sumo Logic

Google Apps Audit Source

A Google Apps Audit Source uses the Google Apps Reports API to ingest all audit logs via watchpoints. Activity from the following Google apps can be collected:

  • Admin
  • Calendar
  • Drive
  • Login
  • Token

Only one Source should be configured per app. In other words, you’d set up one Source to collect Calendar audit logs, another to collect Token audit logs, and so on.

Google Authentication and Authorization

This Source uses OAuth to integrate with the Google Apps Reports API. Therefore, your Google Apps credentials are never stored by Sumo Logic, and we have no visibility into the details of your Google Apps account.  Sumo Logic only stores OAuth tokens that are generated after authentication and authorization.

When creating or modifying a Google Apps Audit Source, you will be required to authenticate with Google using the credentials of a user that has appropriate rights to the account, and to the Reports API.  During Google's OAuth consent flow, you will also be asked to grant the Sumo Logic app permission to use the Reports API.

Configuring a Google Apps Audit Source

Once you've set up a Hosted Collector and have your credentials ready, you're all set to configure the Source.

To configure a Google Apps Audit Source:

  1. In Sumo Logic select Manage > Collection > Collection (Manage > Collection in the classic UI). 
  2. In the Collectors page, click Add Source next to a Hosted Collector.
  3. Select Google Apps Audit.
  4. For Name, type the name of the Source. Enter an optional Description.
  5. For Application, select the app that you’d like this Source to collect data from.
  6. Type the Source Category you’d like to use to later search the data collected from this Source.
  7. Click Sign in with Google to give permission to Sumo Logic to set up watchpoints using the Google Apps Reports API. Click Accept.
  8. Click Save.

To confirm events are being logged, you can compare the data in Sumo Logic to the data shown in Reports in the Google Admin console.

Google App Audit Known Issues

A few known issues are due to limitations of the Google API and cannot be changed by Sumo Logic. 

Authentication Token Limit: Google limits an application (such as Sumo Logic) to 25 active authentication tokens per Google Apps account. According to Google’s documentation, the oldest token is invalidated if a 26th token is created. However, during testing, we found that once the 26th token is issued, all previous 25 tokens become invalid. In this situation, the only workaround is to delete and recreate all Google Apps Audit Sources in Sumo Logic.

Duplicate records: The following situations might result in the collection of duplicate log messages:

  • Complex Events: When a complex an event is logged that contains multiple sub-events, such as a new calendar entry, a JSON object is created to log the event. That object will have an array of event details for each included action (such as inviting guests). When this happens, duplicate event logs might be created for each sub-action. So, if there is one event with three sub actions, the exact same message event data might be duplicated three times, most likely due to a bug in the Google API.
  • Watchpoint expiration: The Google API watchpoints expire after about one week. Unfortunately, there does not appear to be a method for refreshing the expiration of a watchpoint. Sumo Logic must keep track of when each watchpoint expires, and in very close sequence, create a new watchpoint, and kill the old watchpoint. This results in a slight overlap, typically only a few seconds, where there are two watchpoints for the same application. This might result in duplicate logs during that overlapping period, both of which are collected (which is preferable to the possibility of losing some data).

Service Availability: Logging is dependent on the availability of Google services. In some cases, apps may stop producing logs for a period of time. We have observed this during our development and QA testing.

To provide feedback on these limitations, and known issues, contact Google support or your Google account contact.

OAuth 2.0 access token and subscription expiration

Access Tokens

An access token is granted by a third party service, such as Google Apps, to Sumo for accessing audit log APIs required for collecting audit events. Access tokens typically have very short expiration time and thus need to be updated periodically to prevent data loss. In the event of failure to update a token, an entry is logged in the Audit Index.

Subscription Watchpoints

A subscription is a channel established with the third party service to receive notification events. Similar to access tokens, subscriptions are valid only before the expiration time. Before a subscription expires, Sumo invalidates the current subscription and obtains a new subscription. In the event of failure to update a subscription, an entry is logged in the Audit Index.