Audit logging for Cloud Storage for Firebase

This page describes the audit logs created by Firebase as part of Cloud Audit Logs.

Overview

Firebase services write audit logs to help you answer the questions, "Who did what, where, and when?". These are Cloud Audit Logs, provided as part of the Google Cloud Platform project connected to your Firebase project.

Your Firebase projects each contain only the audit logs for resources that are directly within the project.

For a general overview of Cloud Audit Logs, see Cloud Audit Logs overview. For a deeper understanding of the audit log format, see Understand audit logs.

Available audit logs

The following types of audit logs are available for Cloud Storage for Firebase:

  • Admin Activity audit logs

    Includes "admin write" operations that write metadata or configuration information.

    You can't disable Admin Activity audit logs.

For fuller descriptions of the audit log types, see Types of audit logs.

Audited operations

The following summarizes which API operations correspond to each audit log type in Cloud Storage for Firebase:

Audit logs categoryCloud Storage for Firebase operations
Project operations
Admin Activity buckets.get
buckets.list
buckets.addFirebase
buckets.removeFirebase

Audit log format

Audit log entries include the following objects:

  • The log entry itself, which is an object of type LogEntry. Useful fields include the following:

    • The logName contains the resource ID and audit log type.
    • The resource contains the target of the audited operation.
    • The timeStamp contains the time of the audited operation.
    • The protoPayload contains the audited information.
  • The audit logging data, which is an AuditLog object held in the protoPayload field of the log entry.

  • Optional service-specific audit information, which is a service-specific object. For older integrations, this object is held in the serviceData field of the AuditLog object; newer integrations use the metadata field.

For other fields in these objects, and how to interpret them, review Understand audit logs.

Log name

Cloud Audit Logs resource names indicate the Firebase project or other GCP entity that owns the audit logs, and whether the log contains Admin Activity, Data Access, Policy Denied, or System Event audit logging data. For example, the following shows log names for project-level Admin Activity audit logs and an organization's Data Access audit logs. The variables denote Firebase project and organization identifiers.

projects/PROJECT_ID/logs/cloudaudit.googleapis.com%2Factivity
organizations/ORGANIZATION_ID/logs/cloudaudit.googleapis.com%2Fdata_access

Service name

Cloud Storage for Firebase audit logs use the service name firebasestorage.googleapis.com.

For a full list of all the Stackdriver Logging API service names and their corresponding monitored resource type, see Map services to resources.

Resource types

Cloud Storage for Firebase audit logs use the resource type audited_resource for all audit logs.

For a list of all the Stackdriver Logging monitored resource types and descriptive information, see Monitored resource types.

Enable audit logging

Admin Activity audit logs are always enabled; you can't disable them.

Permissions and roles

Cloud IAM permissions and roles determine your ability to access audit logs data in GCP resources.

When deciding which Logging-specific permissions and roles apply to your use case, consider the following:

  • The Logs Viewer role (roles/logging.viewer) gives you read-only access to Admin Activity, Policy Denied, and System Event audit logs. If you have just this role, you cannot view Data Access audit logs that are in the _Default bucket.

  • The Private Logs Viewer role(roles/logging.privateLogViewer) includes the permissions contained in roles/logging.viewer, plus the ability to read Data Access audit logs in the _Default bucket.

    Note that if these private logs are stored in user-defined buckets, then any user who has permissions to read logs in those buckets can read the private logs. For more information on log buckets, see Routing and storage overview.

For more information on the Cloud IAM permissions and roles that apply to audit logs data, see Access control.

View logs

To find and view audit logs, you need to know the identifier of the Firebase project, folder, or organization for which you want to view audit logging information. You can further specify other indexed LogEntry fields, like resource.type; for details, review Find log entries quickly.

The following are the audit log names; they include variables for the identifiers of the Firebase project, folder, or organization:

   projects/PROJECT_ID/logs/cloudaudit.googleapis.com%2Factivity
   projects/PROJECT_ID/logs/cloudaudit.googleapis.com%2Fdata_access
   projects/PROJECT_ID/logs/cloudaudit.googleapis.com%2Fsystem_event
   projects/PROJECT_ID/logs/cloudaudit.googleapis.com%2Fpolicy

   folders/FOLDER_ID/logs/cloudaudit.googleapis.com%2Factivity
   folders/FOLDER_ID/logs/cloudaudit.googleapis.com%2Fdata_access
   folders/FOLDER_ID/logs/cloudaudit.googleapis.com%2Fsystem_event
   folders/FOLDER_ID/logs/cloudaudit.googleapis.com%2Fpolicy

   organizations/ORGANIZATION_ID/logs/cloudaudit.googleapis.com%2Factivity
   organizations/ORGANIZATION_ID/logs/cloudaudit.googleapis.com%2Fdata_access
   organizations/ORGANIZATION_ID/logs/cloudaudit.googleapis.com%2Fsystem_event
   organizations/ORGANIZATION_ID/logs/cloudaudit.googleapis.com%2Fpolicy

You can view audit logs in Stackdriver Logging using the GCP Console, the gcloud command-line tool, or the Logging API.

Console

You can use the Logs Explorer in the GCP Console to retrieve your audit log entries for your Firebase project, folder, or organization:

  1. In the GCP Console, go to the Logging > Logs Explorer page.

    Go to the Logs Explorer page

  2. On the Logs Explorer page, select an existing Firebase project, folder or organization.

  3. In the Query builder pane, do the following:

    • In Resource type, select the GCP resource whose audit logs you want to see.

    • In Log name, select the audit log type that you want to see:

      • For Admin Activity audit logs, select activity.
      • For Data Access audit logs, select data_access.
      • For System Event audit logs, select system_event.
      • For Policy Denied audit logs, select policy.

    If you don't see these options, then there aren't any audit logs of that type available in the Firebase project, folder, or organization.

    For more details about querying using the Logs Explorer, see Build log queries.

gcloud

The gcloud command-line tool provides a command-line interface to the Stackdriver Logging API. Supply a valid PROJECT_ID, FOLDER_ID, or ORGANIZATION_ID in each of the log names.

To read your Firebase project-level audit log entries, run the following command:

gcloud logging read "logName : projects/PROJECT_ID/logs/cloudaudit.googleapis.com" --project=PROJECT_ID

To read your folder-level audit log entries, run the following command:

gcloud logging read "logName : folders/FOLDER_ID/logs/cloudaudit.googleapis.com" --folder=FOLDER_ID

To read your organization-level audit log entries, run the following command:

gcloud logging read "logName : organizations/ORGANIZATION_ID/logs/cloudaudit.googleapis.com" --organization=ORGANIZATION_ID

For more information about using the gcloud tool, see Read log entries.

API

When building your queries, replace the variables with valid values, substitute the appropriate project-level, folder-level, or organization-level audit log name or identifiers as listed in the audit log names. For example, if your query includes a PROJECT_ID, then the project identifier you supply must refer to the currently selected Firebase project.

To use the Logging API to look at your audit log entries, do the following:

  1. Go to the Try this API section in the documentation for the entries.list method.

  2. Put the following into the Request body part of the Try this API form. Clicking on this prepopulated form automatically fills the request body, but you need to supply a valid PROJECT_ID in each of the log names.

    {
      "resourceNames": [
        "projects/PROJECT_ID"
      ],
      "pageSize": 5,
      "filter": "logName : projects/PROJECT_ID/logs/cloudaudit.googleapis.com"
    }
    
  3. Click Execute.

For more details about querying, see Logging query language.

For an example of an audit log entry and how to find the most important information in it, see Sample audit log entry.

Route audit logs

You can route audit logs to supported destinations in the same way that you can route other kinds of logs. Here are some reasons you might want to route your audit logs:

  • To keep audit logs for a longer period of time or to use more powerful search capabilities, you can route copies of your audit logs to Google Cloud Storage, BigQuery, or Google Cloud Pub/Sub. Using Cloud Pub/Sub, you can route to other applications, other repositories, and to third parties.

  • To manage your audit logs across an entire organization, you can create aggregated sinks that can route logs from any or all Firebase projects in the organization.

For instructions on routing logs, see Configure sinks.

Pricing

Admin Activity audit logs and System Event audit logs are free.

Data Access audit logs and Policy Denied audit logs are chargeable.

For more information about Stackdriver Logging pricing, see Stackdriver pricing: Stackdriver Logging.