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[ aws . ec2 ]

create-flow-logs

Description

Creates one or more flow logs to capture information about IP traffic for a specific network interface, subnet, or VPC.

Flow log data for a monitored network interface is recorded as flow log records, which are log events consisting of fields that describe the traffic flow. For more information, see Flow Log Records in the Amazon Virtual Private Cloud User Guide .

When publishing to CloudWatch Logs, flow log records are published to a log group, and each network interface has a unique log stream in the log group. When publishing to Amazon S3, flow log records for all of the monitored network interfaces are published to a single log file object that is stored in the specified bucket.

For more information, see VPC Flow Logs in the Amazon Virtual Private Cloud User Guide .

See also: AWS API Documentation

See 'aws help' for descriptions of global parameters.

Synopsis

  create-flow-logs
[--dry-run | --no-dry-run]
[--client-token <value>]
[--deliver-logs-permission-arn <value>]
[--log-group-name <value>]
--resource-ids <value>
--resource-type <value>
--traffic-type <value>
[--log-destination-type <value>]
[--log-destination <value>]
[--log-format <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]

Options

--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 .

--client-token (string)

Unique, case-sensitive identifier that you provide to ensure the idempotency of the request. For more information, see How to Ensure Idempotency .

--deliver-logs-permission-arn (string)

The ARN for the IAM role that permits Amazon EC2 to publish flow logs to a CloudWatch Logs log group in your account.

If you specify LogDestinationType as s3 , do not specify DeliverLogsPermissionArn or LogGroupName .

--log-group-name (string)

The name of a new or existing CloudWatch Logs log group where Amazon EC2 publishes your flow logs.

If you specify LogDestinationType as s3 , do not specify DeliverLogsPermissionArn or LogGroupName .

--resource-ids (list)

The ID of the subnet, network interface, or VPC for which you want to create a flow log.

Constraints: Maximum of 1000 resources

Syntax:

"string" "string" ...

--resource-type (string)

The type of resource for which to create the flow log. For example, if you specified a VPC ID for the ResourceId property, specify VPC for this property.

Possible values:

  • VPC
  • Subnet
  • NetworkInterface

--traffic-type (string)

The type of traffic to log. You can log traffic that the resource accepts or rejects, or all traffic.

Possible values:

  • ACCEPT
  • REJECT
  • ALL

--log-destination-type (string)

Specifies the type of destination to which the flow log data is to be published. Flow log data can be published to CloudWatch Logs or Amazon S3. To publish flow log data to CloudWatch Logs, specify cloud-watch-logs . To publish flow log data to Amazon S3, specify s3 .

If you specify LogDestinationType as s3 , do not specify DeliverLogsPermissionArn or LogGroupName .

Default: cloud-watch-logs

Possible values:

  • cloud-watch-logs
  • s3

--log-destination (string)

Specifies the destination to which the flow log data is to be published. Flow log data can be published to a CloudWatch Logs log group or an Amazon S3 bucket. The value specified for this parameter depends on the value specified for LogDestinationType .

If LogDestinationType is not specified or cloud-watch-logs , specify the Amazon Resource Name (ARN) of the CloudWatch Logs log group.

If LogDestinationType is s3 , specify the ARN of the Amazon S3 bucket. You can also specify a subfolder in the bucket. To specify a subfolder in the bucket, use the following ARN format: bucket_ARN/subfolder_name/ . For example, to specify a subfolder named my-logs in a bucket named my-bucket , use the following ARN: arn:aws:s3:::my-bucket/my-logs/ . You cannot use AWSLogs as a subfolder name. This is a reserved term.

--log-format (string)

The fields to include in the flow log record, in the order in which they should appear. For a list of available fields, see Flow Log Records . If you omit this parameter, the flow log is created using the default format. If you specify this parameter, you must specify at least one field.

Specify the fields using the ${field-id} format, separated by spaces. For the AWS CLI, use single quotation marks (' ') to surround the parameter value.

Only applicable to flow logs that are published to an Amazon S3 bucket.

--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.

Examples

To create a flow log

This example creates a flow log that captures all rejected traffic for network interface eni-aa22bb33. The flow logs are delivered to a log group in CloudWatch Logs called my-flow-logs in account 123456789101, using the IAM role publishFlowLogs.

Command:

aws ec2 create-flow-logs --resource-type NetworkInterface --resource-ids eni-aa22bb33 --traffic-type REJECT --log-group-name my-flow-logs --deliver-logs-permission-arn arn:aws:iam::123456789101:role/publishFlowLogs

Output:

{
  "Unsuccessful": [],
  "FlowLogIds": [
    "fl-1a2b3c4d"
  ],
  "ClientToken": "lO+mDZGO+HCFEXAMPLEfWNO00bInKkBcLfrC"
}

Output

ClientToken -> (string)

Unique, case-sensitive identifier that you provide to ensure the idempotency of the request.

FlowLogIds -> (list)

The IDs of the flow logs.

(string)

Unsuccessful -> (list)

Information about the flow logs that could not be created successfully.

(structure)

Information about items that were not successfully processed in a batch call.

Error -> (structure)

Information about the error.

Code -> (string)

The error code.

Message -> (string)

The error message accompanying the error code.

ResourceId -> (string)

The ID of the resource.