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Accessing diagnostic logs for Azure Data Lake Analytics

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  • 5 min. za čitanje

Diagnostic logging allows you to collect data access audit trails. These logs provide information such as:

  • A list of users that accessed the data.
  • How frequently the data is accessed.
  • How much data is stored in the account.

Enable logging

  1. Sign on to the Azure portal.

  2. Open your Data Lake Analytics account and select Diagnostic logs from the Monitor section. Next, select Turn on diagnostics.

    Screenshot that shows the "Diagnostic logs" action selected and "Turn on diagnostics to collect the following logs" highlighted.

  3. From Diagnostics settings, enter a Name for this logging configuration and then select logging options.

    Turn on diagnostics to collect audit and request logs

    • You can choose to store/process the data in three different ways.

      • Select Archive to a storage account to store logs in an Azure storage account. Use this option if you want to archive the data. If you select this option, you must provide an Azure storage account to save the logs to.

      • Select Stream to an Event Hub to stream log data to an Azure Event Hub. Use this option if you have a downstream processing pipeline that is analyzing incoming logs in real time. If you select this option, you must provide the details for the Azure Event Hub you want to use.

      • Select Send to Log Analytics to send the data to the Azure Monitor service. Use this option if you want to use Azure Monitor logs to gather and analyze logs.

    • Specify whether you want to get audit logs or request logs or both. A request log captures every API request. An audit log records all operations that are triggered by that API request.

    • For Archive to a storage account, specify the number of days to retain the data.

    • Click Save.

      Note

      You must select either Archive to a storage account, Stream to an Event Hub or Send to Log Analytics before clicking the Save button.

Use the Azure Storage account that contains log data

  1. To display the blob containers that hold logging data, open the Azure Storage account used for Data Lake Analytics for logging, and then click Blobs.

    • The container insights-logs-audit contains the audit logs.
    • The container insights-logs-requests contains the request logs.

  2. Within the containers, the logs are stored under the following file structure:

    resourceId=/
  SUBSCRIPTIONS/
    <<SUBSCRIPTION_ID>>/
      RESOURCEGROUPS/
        <<RESOURCE_GRP_NAME>>/
          PROVIDERS/
            MICROSOFT.DATALAKEANALYTICS/
              ACCOUNTS/
                <DATA_LAKE_ANALYTICS_NAME>>/
                  y=####/
                    m=##/
                      d=##/
                        h=##/
                          m=00/
                            PT1H.json

    Note

    The ## entries in the path contain the year, month, day, and hour in which the log was created. Data Lake Analytics creates one file every hour, so m= always contains a value of 00.

    As an example, the complete path to an audit log could be:

    https://adllogs.blob.core.windows.net/insights-logs-audit/resourceId=/SUBSCRIPTIONS/<sub-id>/RESOURCEGROUPS/myresourcegroup/PROVIDERS/MICROSOFT.DATALAKEANALYTICS/ACCOUNTS/mydatalakeanalytics/y=2016/m=07/d=18/h=04/m=00/PT1H.json

    Similarly, the complete path to a request log could be:

    https://adllogs.blob.core.windows.net/insights-logs-requests/resourceId=/SUBSCRIPTIONS/<sub-id>/RESOURCEGROUPS/myresourcegroup/PROVIDERS/MICROSOFT.DATALAKEANALYTICS/ACCOUNTS/mydatalakeanalytics/y=2016/m=07/d=18/h=14/m=00/PT1H.json

Log structure

The audit and request logs are in a structured JSON format.

Request logs

Here's a sample entry in the JSON-formatted request log. Each blob has one root object called records that contains an array of log objects.

{
"records":
  [
    . . . .
    ,
    {
         "time": "2016-07-07T21:02:53.456Z",
         "resourceId": "/SUBSCRIPTIONS/<subscription_id>/RESOURCEGROUPS/<resource_group_name>/PROVIDERS/MICROSOFT.DATALAKEANALYTICS/ACCOUNTS/<data_lake_analytics_account_name>",
         "category": "Requests",
         "operationName": "GetAggregatedJobHistory",
         "resultType": "200",
         "callerIpAddress": "::ffff:1.1.1.1",
         "correlationId": "4a11c709-05f5-417c-a98d-6e81b3e29c58",
         "identity": "1808bd5f-62af-45f4-89d8-03c5e81bac30",
         "properties": {
             "HttpMethod":"POST",
             "Path":"/JobAggregatedHistory",
             "RequestContentLength":122,
             "ClientRequestId":"3b7adbd9-3519-4f28-a61c-bd89506163b8",
             "StartTime":"2016-07-07T21:02:52.472Z",
             "EndTime":"2016-07-07T21:02:53.456Z"
             }
    }
    ,
    . . . .
  ]
}

Request log schema

Name Type Description
time String The timestamp (in UTC) of the log
resourceId String The identifier of the resource that operation took place on
category String The log category. For example, Requests.
operationName String Name of the operation that is logged. For example, GetAggregatedJobHistory.
resultType String The status of the operation, For example, 200.
callerIpAddress String The IP address of the client making the request
correlationId String The identifier of the log. This value can be used to group a set of related log entries.
identity Object The identity that generated the log
properties JSON See the next section (Request log properties schema) for details

Request log properties schema

Name Type Description
HttpMethod String The HTTP Method used for the operation. For example, GET.
Path String The path the operation was performed on
RequestContentLength int The content length of the HTTP request
ClientRequestId String The identifier that uniquely identifies this request
StartTime String The time at which the server received the request
EndTime String The time at which the server sent a response

Audit logs

Here's a sample entry in the JSON-formatted audit log. Each blob has one root object called records that contains an array of log objects.

{
"records":
  [
    {
         "time": "2016-07-28T19:15:16.245Z",
         "resourceId": "/SUBSCRIPTIONS/<subscription_id>/RESOURCEGROUPS/<resource_group_name>/PROVIDERS/MICROSOFT.DATALAKEANALYTICS/ACCOUNTS/<data_lake_ANALYTICS_account_name>",
         "category": "Audit",
         "operationName": "JobSubmitted",
         "identity": "user@somewhere.com",
         "properties": {
             "JobId":"D74B928F-5194-4E6C-971F-C27026C290E6",
             "JobName": "New Job",
             "JobRuntimeName": "default",
             "SubmitTime": "7/28/2016 7:14:57 PM"
             }
    }
  ]
}

Audit log schema

Name Type Description
time String The timestamp (in UTC) of the log
resourceId String The identifier of the resource that operation took place on
category String The log category. For example, Audit.
operationName String Name of the operation that is logged. For example, JobSubmitted.
resultType String A substatus for the job status (operationName).
resultSignature String Additional details on the job status (operationName).
identity String The user that requested the operation. For example, susan@contoso.com.
properties JSON See the next section (Audit log properties schema) for details

Note

resultType and resultSignature provide information on the result of an operation, and only contain a value if an operation has completed. For example, they only contain a value when operationName contains a value of JobStarted or JobEnded.

Audit log properties schema

Name Type Description
JobId String The ID assigned to the job
JobName String The name that was provided for the job
JobRunTime String The runtime used to process the job
SubmitTime String The time (in UTC) that the job was submitted
StartTime String The time the job started running after submission (in UTC)
EndTime String The time the job ended
Parallelism String The number of Data Lake Analytics units requested for this job during submission

Note

SubmitTime, StartTime, EndTime, and Parallelism provide information on an operation. These entries only contain a value if that operation has started or completed. For example, SubmitTime only contains a value after operationName has the value JobSubmitted.

Process the log data

Azure Data Lake Analytics provides a sample on how to process and analyze the log data. You can find the sample at https://github.com/Azure/AzureDataLake/tree/master/Samples/AzureDiagnosticsSample.

Next steps

Overview of Azure Data Lake Analytics