CloudWatchLogs / Client / get_log_events

get_log_events#

CloudWatchLogs.Client.get_log_events(**kwargs)#

Lists log events from the specified log stream. You can list all of the log events or filter using a time range.

GetLogEvents is a paginated operation. Each page returned can contain up to 1 MB of log events or up to 10,000 log events. A returned page might only be partially full, or even empty. For example, if the result of a query would return 15,000 log events, the first page isn’t guaranteed to have 10,000 log events even if they all fit into 1 MB.

Partially full or empty pages don’t necessarily mean that pagination is finished. As long as the nextBackwardToken or nextForwardToken returned is NOT equal to the nextToken that you passed into the API call, there might be more log events available. The token that you use depends on the direction you want to move in along the log stream. The returned tokens are never null.

Note

If you set startFromHead to true and you don’t include endTime in your request, you can end up in a situation where the pagination doesn’t terminate. This can happen when the new log events are being added to the target log streams faster than they are being read. This situation is a good use case for the CloudWatch Logs Live Tail feature.

If you are using CloudWatch cross-account observability, you can use this operation in a monitoring account and view data from the linked source accounts. For more information, see CloudWatch cross-account observability.

You can specify the log group to search by using either logGroupIdentifier or logGroupName. You must include one of these two parameters, but you can’t include both.

Note

If you are using log transformation, the GetLogEvents operation returns only the original versions of log events, before they were transformed. To view the transformed versions, you must use a CloudWatch Logs query.

See also: AWS API Documentation

Request Syntax

response = client.get_log_events(
    logGroupName='string',
    logGroupIdentifier='string',
    logStreamName='string',
    startTime=123,
    endTime=123,
    nextToken='string',
    limit=123,
    startFromHead=True|False,
    unmask=True|False
)
Parameters:

  • logGroupName (string) –

    The name of the log group.

    Note

    You must include either logGroupIdentifier or logGroupName, but not both.

  • logGroupIdentifier (string) –

    Specify either the name or ARN of the log group to view events from. If the log group is in a source account and you are using a monitoring account, you must use the log group ARN.

    Note

    You must include either logGroupIdentifier or logGroupName, but not both.

  • logStreamName (string) –

    [REQUIRED]

    The name of the log stream.

  • startTime (integer) – The start of the time range, expressed as the number of milliseconds after Jan 1, 1970 00:00:00 UTC. Events with a timestamp equal to this time or later than this time are included. Events with a timestamp earlier than this time are not included.

  • endTime (integer) – The end of the time range, expressed as the number of milliseconds after Jan 1, 1970 00:00:00 UTC. Events with a timestamp equal to or later than this time are not included.

  • nextToken (string) – The token for the next set of items to return. (You received this token from a previous call.)

  • limit (integer) – The maximum number of log events returned. If you don’t specify a limit, the default is as many log events as can fit in a response size of 1 MB (up to 10,000 log events).

  • startFromHead (boolean) –

    If the value is true, the earliest log events are returned first. If the value is false, the latest log events are returned first. The default value is false.

    If you are using a previous nextForwardToken value as the nextToken in this operation, you must specify true for startFromHead.

  • unmask (boolean) –

    Specify true to display the log event fields with all sensitive data unmasked and visible. The default is false.

    To use this operation with this parameter, you must be signed into an account with the logs:Unmask permission.

Return type:

dict

Returns:

Response Syntax

{
    'events': [
        {
            'timestamp': 123,
            'message': 'string',
            'ingestionTime': 123
        },
    ],
    'nextForwardToken': 'string',
    'nextBackwardToken': 'string'
}

Response Structure

  • (dict) –

    • events (list) –

      The events.

      • (dict) –

        Represents a log event.

        • timestamp (integer) –

          The time the event occurred, expressed as the number of milliseconds after Jan 1, 1970 00:00:00 UTC.

        • message (string) –

          The data contained in the log event.

        • ingestionTime (integer) –

          The time the event was ingested, expressed as the number of milliseconds after Jan 1, 1970 00:00:00 UTC.

    • nextForwardToken (string) –

      The token for the next set of items in the forward direction. The token expires after 24 hours. If you have reached the end of the stream, it returns the same token you passed in.

    • nextBackwardToken (string) –

      The token for the next set of items in the backward direction. The token expires after 24 hours. This token is not null. If you have reached the end of the stream, it returns the same token you passed in.

Exceptions