Cloud Logging for storage batch operations

This page describes how to configure and view storage batch operations logs by using Cloud Logging. A storage batch operations job can be configured to generate Cloud Logging log entries for each transformation job. Each log entry corresponds to the attempted transformation of an object.

Storage batch operations support logging to both Cloud Logging and Cloud Storage Cloud Audit Logs. While both options capture storage batch operations actions, we recommend using Cloud Logging. Cloud Logging provides a centralized platform for log analysis, real-time monitoring, and advanced filtering, offering a robust solution for managing and understanding your batch operation activity.

Before you begin

Verify that you have access to Cloud Logging. To use Cloud Logging, we recommend granting the Logs Viewer (roles/logging.viewer) Identity and Access Management role. The Logs Viewer (roles/logging.viewer) Identity and Access Management role provides the Identity and Access Management permissions required to view your Cloud Logging data. For more information about Logging access permissions, see Access control with IAM.

To verify and grant the IAM permissions, complete the following steps:

View current access to verify the access that each principal has.
Grant a role to relevant principals in your project.

Understand logging details

When logging is enabled, storage batch operations capture the following details:

Loggable action: The loggable action value is always transform.
Loggable states: For each action, you can choose to log one or both of the following states:
- SUCCEEDED: The action was successful.
- FAILED: The action failed.

Enable logging

To enable logging, specify the actions and the states to log.

Command line

When creating a storage batch operations job with gcloud storage batch-operations jobs create, use the --log-actions and --log-action-states flags to enable logging.

gcloud storage batch-operations jobs create JOB_NAME \
  --manifest-location=MANIFEST_LOCATION \
  --delete-object \
  --log-actions=transform \
  --log-action-states=LOG_ACTION_STATES

Where:

JOB_NAME is the name you want to give your job. For example, my-job.
MANIFEST_LOCATION is the location of your manifest. For example, gs://my-bucket/manifest.csv.
LOG_ACTION_STATES is a comma-separated list of states to log. For example, succeeded,failed.

REST API

Create a storage batch operations job with a LoggingConfig.

{
   "loggingConfig": {
      "logActions": ["TRANSFORM"],
      "logActionStates": ["LOG_ACTION_STATES"],
        }
}

Where:

LOG_ACTION_STATES is a comma-separated list of states to log. For example, "SUCCEEDED","FAILED".

View logs

To view storage batch operations logs, do the following:

Console

Go to the Google Cloud navigation menu and select Logging > Logs Explorer :

Go to the Logs Explorer
Select a Google Cloud project.
From the Upgrade menu, switch from Legacy Logs Viewer to Logs Explorer.
To filter your logs to show only storage batch operations entries, type storage_batch_operations_job into the query field and click Run query.
In the Query results pane, click Edit time to change the time period for which to return results.

For more information on using the Logs Explorer, see Using the Logs Explorer.

Command line

To use the gcloud CLI to search for storage batch operations logs, use the gcloud logging read command.

Specify a filter to limit your results to storage batch operations logs.

gcloud logging read "resource.type=storage_batch_operations_job"

REST API

Use the entries.list Cloud Logging API method.

To filter your results to include only storage batch operations-related entries, use the filter field. The following is a sample JSON request object:

{
"resourceNames":
  [
    "projects/my-project-name"
  ],
  "orderBy": "timestamp desc",
  "filter": "resource.type=\"storage_batch_operations_job\""
}

Where:

my-project-name is the name of your project.

Storage batch operations log format

All storage batch operations-specific fields are contained within a jsonPayload object. While the exact content of jsonPayload varies based on the job type, there is a common structure shared across all TransformActivityLog entries. This section outlines the common log fields and then details the operation-specific fields.

Common log fields

The following fields appear in all logs:

jsonPayload: {
"@type": "type.googleapis.com/google.cloud.storagebatchoperations.logging.TransformActivityLog",
"completeTime": "YYYY-MM-DDTHH:MM:SS.SSSSSSSSSZ",
"status": {
  "errorMessage": "String indicating error",
  "errorType": "ENUM_VALUE",
  "statusCode": "ENUM_VALUE"
},
"logName": "projects/PROJECT_ID/logs/storagebatchoperations.googleapis.com%2Ftransform_activity",
"receiveTimestamp": "YYYY-MM-DDTHH:MM:SS.SSSSSSSSSZ",
"resource": {
  "labels": {
    "location":"us-central1",
    "job_id": "BATCH_JOB_ID",
    "resource_container": "RESOURCE_CONTAINER",
    // ... other labels
  },
  "type": "storagebatchoperations.googleapis.com/Job"
},
// Operation-specific details will be nested here (for example,
// "DeleteObject", "PutObjectHold", "RewriteObject", "PutMetadata")
// Each operation-specific object will also contain the following
// object: "objectMetadataBefore": {
//   "gcsObject": {
//     "bucket": "BUCKET_NAME",
//     "generation": "GENERATION_NUMBER",
//     "objectKey": "OBJECT_PATH"
//   }
// }
}

The following table describes each of the common log fields:

Common log fields	Type	Description
`@type`	String	Specifies the type of the log entry's payload and indicates that the log represents a `TransformActivityLog` for storage batch operations.
`completeTime`	Timestamp	The ISO 8601-compliant timestamp at which the operation completed.
`status`	Object	Provides information about the result of the batch operation activity.
`status.errorMessage`	String	An error message if the operation fails. The error message appears only if the `status.statusCode` value is not `OK`.
`status.errorType`	String	The error type. The error type appears only if the `status.statusCode` value is not `OK`.
`status.statusCode`	String	The status code of the operation. The operation is successful if the value is `OK`; any other value indicates failure.
`logName`	String	The full resource name of the log, indicating the project and the log stream.
`receiveTimestamp`	Timestamp	The timestamp when the log entry was received by the logging system.
`resource`	Object	Information about the resource that generated the log entry.
`resource.labels`	Object	Key-value pairs providing additional identifying information about the resource.
`resource.type`	String	The type of resource that generated the log.
`objectMetadataBefore`	Object	Contains metadata of the object before the batch operation was attempted.
`objectMetadataBefore.gcsObject`	Object	Details about the object.
`objectMetadataBefore.gcsObject.bucket`	String	The name of the bucket where the object resides.
`objectMetadataBefore.gcsObject.generation`	String	The generation number of the object before the operation.
`objectMetadataBefore.gcsObject.objectKey`	String	The full path of the object within the bucket.

Operation-specific jsonPayload contents

The difference between log entries for different batch operations lies in the top-level object nested within the jsonPayload. Only one of the following objects is available in a given log entry, corresponding to the specific batch operation performed:

Delete object (DeleteObject)

jsonPayload:
{
"DeleteObject": {
  "objectMetadataBefore": {
    "gcsObject": {
      "bucket": "test-bucket",
      "generation": "1678912345678901",
      "objectKey": "test_object.txt"
    }
  }
  }
}

Put object hold (PutObjectHold)

jsonPayload:
{
"PutObjectHold": {
  "objectMetadataBefore": {
    "gcsObject": {
      "bucket": "test-bucket",
      "generation": "1678912345678901",
      "objectKey": "test_object.txt"
    }
  },
  "temporaryHoldAfter": True,
  "eventBasedHoldAfter": True
}
}

Rewrite object (RewriteObject)

jsonPayload:
{
"RewriteObject": {
  "objectMetadataBefore": {
    "gcsObject": {
      "bucket": "test-bucket",
      "generation": "1678912345678901",
      "objectKey": "test_object.txt"
    }
  },
  "kmsKeyVersionAfter": "projects/my-gcp-project/locations/us-central1/keyRings/my-keyring-01/cryptoKeys/my-encryption-key/cryptoKeyVersions/1"
}
}

Put metadata (PutMetadata)

jsonPayload:
{
"PutMetadata": {
  "objectMetadataBefore": {
    "gcsObject": {
      "bucket": "test-bucket",
      "generation": "1678912345678901",
      "objectKey": "test_object.txt"
    }
  },
  "content_disposition_after": "attachment; filename=\"report_final.pdf\"",
  "content_encoding_after": "gzip",
  "content_language_after": "en-US",
  "content_type_after": "application/pdf",
  "cache_control_after": "public, max-age=3600",
  "custom_time_after": "2025-06-27T10:00:00Z",
  "custom_metadata_after": {
    "project": "marketing",
    "version": "2.0",
    "approvedBy": "Admin"
  }
}
}

The following table describes the operation-specific log fields:

Operation-specific log fields	Type	Description
`PutObjectHold`	Object	Indicates a hold operation on an object.
`PutObjectHold.temporaryHoldAfter`	Boolean	If the value is `True`, it indicates that a temporary hold was applied to the object after the storage batch operations job completed. Valid values are `True` or `False`.
`PutObjectHold.eventBasedHoldAfter`	Boolean	If the value is `True`, it indicates that an event-based hold was applied to the object after the storage batch operations job completed. Valid values are `True` or `False`.
`RewriteObject`	Object	Indicates a rewrite operation on an object.
`RewriteObject.kmsKeyVersionAfter`	String	The Cloud Key Management Service key version used after the rewrite job. The `kmsKeyVersionAfter` field is populated if the object's encryption key changed as a result of the rewrite. It's an optional field, meaning it might not be present if the Cloud KMS key version remained unchanged after the rewrite.
`PutMetadata`	Object	Indicates a metadata update operation on an object.
`PutMetadata.content_disposition_after`	String	Specifies the `Content-Disposition` header value after the completion of the `PutMetadata` job. It's an optional field and is only populated if the content disposition was set or modified.
`PutMetadata.content_encoding_after`	String	Specifies the `Content-Encoding` header value after the completion of the `PutMetadata` job. It's an optional field and is only populated if the content encoding was set or modified.
`PutMetadata.content_language_after`	String	Specifies the `Content-Language` header value after the completion of the `PutMetadata` job. It's an optional field and is only populated if the content language was set or modified.
`PutMetadata.content_type_after`	String	Specifies the `Content-Type` header value after the completion of the `PutMetadata` job. It's an optional field and is only populated if the content type was set or modified.
`PutMetadata.cache_control_after`	String	Specifies the `Cache-Control` header value after the completion of the `PutMetadata` job. It's an optional field and is only populated if the cache control was set or modified.
`PutMetadata.custom_time_after`	String	Specifies the `Custom-Time` header value after the completion of the `PutMetadata` job. It's an optional field and is only populated if the custom time was set or modified.
`PutMetadata.custom_metadata_after`	Map (key: string, value: string)	Contains a map of `Custom- Metadata` key-value pairs after the transformation. This field includes any user-defined metadata that was set or modified on the object. It allows for flexible storage of additional metadata.

Cloud Logging for storage batch operations Stay organized with collections Save and categorize content based on your preferences.

Before you begin

Understand logging details

Enable logging

Command line

REST API

View logs

Console

Command line

REST API

Storage batch operations log format

Cloud Logging for storage batch operations