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User Guide

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[ aws . ec2 ]



Describes one or more flow logs. To view the information in your flow logs (the log streams for the network interfaces), you must use the CloudWatch Logs console or the CloudWatch Logs API.

See also: AWS API Documentation

See 'aws help' for descriptions of global parameters.


[--dry-run | --no-dry-run]
[--filter <value>]
[--flow-log-ids <value>]
[--max-results <value>]
[--next-token <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]


--dry-run | --no-dry-run (boolean)

Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation . Otherwise, it is UnauthorizedOperation .

--filter (list)

One or more filters.

  • deliver-log-status - The status of the logs delivery (SUCCESS | FAILED ).
  • log-destination-type - The type of destination to which the flow log publishes data. Possible destination types include cloud-watch-logs and S3 .
  • flow-log-id - The ID of the flow log.
  • log-group-name - The name of the log group.
  • resource-id - The ID of the VPC, subnet, or network interface.
  • traffic-type - The type of traffic (ACCEPT | REJECT | ALL ).

Shorthand Syntax:

Name=string,Values=string,string ...

JSON Syntax:

    "Name": "string",
    "Values": ["string", ...]

--flow-log-ids (list)

One or more flow log IDs.


"string" "string" ...

--max-results (integer)

The maximum number of results to return for the request in a single page. The remaining results can be seen by sending another request with the returned NextToken value. This value can be between 5 and 1000. If MaxResults is given a value larger than 1000, only 1000 results are returned. You cannot specify this parameter and the flow log IDs parameter in the same request.

--next-token (string)

The token to retrieve the next page of results.

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See 'aws help' for descriptions of global parameters.


To describe flow logs

This example describes all of your flow logs.


aws ec2 describe-flow-logs


  "FlowLogs": [
      "ResourceId": "eni-11aa22bb",
      "CreationTime": "2015-06-12T14:41:15Z",
      "LogGroupName": "MyFlowLogs",
      "TrafficType": "ALL",
      "FlowLogStatus": "ACTIVE",
      "FlowLogId": "fl-1a2b3c4d",
      "DeliverLogsPermissionArn": "arn:aws:iam::123456789101:role/flow-logs-role"

This example uses a filter to describe only flow logs that are in the log group MyFlowLogs in Amazon CloudWatch Logs.


aws ec2 describe-flow-logs --filter "Name=log-group-name,Values=MyFlowLogs"


FlowLogs -> (list)

Information about the flow logs.


Describes a flow log.

CreationTime -> (timestamp)

The date and time the flow log was created.

DeliverLogsErrorMessage -> (string)

Information about the error that occurred. Rate limited indicates that CloudWatch Logs throttling has been applied for one or more network interfaces, or that you've reached the limit on the number of log groups that you can create. Access error indicates that the IAM role associated with the flow log does not have sufficient permissions to publish to CloudWatch Logs. Unknown error indicates an internal error.

DeliverLogsPermissionArn -> (string)

The ARN of the IAM role that posts logs to CloudWatch Logs.

DeliverLogsStatus -> (string)

The status of the logs delivery (SUCCESS | FAILED ).

FlowLogId -> (string)

The flow log ID.

FlowLogStatus -> (string)

The status of the flow log (ACTIVE ).

LogGroupName -> (string)

The name of the flow log group.

ResourceId -> (string)

The ID of the resource on which the flow log was created.

TrafficType -> (string)

The type of traffic captured for the flow log.

LogDestinationType -> (string)

Specifies the type of destination to which the flow log data is published. Flow log data can be published to CloudWatch Logs or Amazon S3.

LogDestination -> (string)

Specifies the destination to which the flow log data is published. Flow log data can be published to an CloudWatch Logs log group or an Amazon S3 bucket. If the flow log publishes to CloudWatch Logs, this element indicates the Amazon Resource Name (ARN) of the CloudWatch Logs log group to which the data is published. If the flow log publishes to Amazon S3, this element indicates the ARN of the Amazon S3 bucket to which the data is published.

NextToken -> (string)

The token to use to retrieve the next page of results. This value is null when there are no more results to return.