AWS Tools for Windows PowerShell
Command Reference

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Synopsis

Calls the Amazon Elastic Compute Cloud (EC2) CreateFlowLogs API operation.

Syntax

New-EC2FlowLog
-LogGroupName <String>
-DeliverLogsPermissionArn <String>
-LogDestination <String>
-LogDestinationType <LogDestinationType>
-LogFormat <String>
-MaxAggregationInterval <Int32>
-ResourceId <String[]>
-ResourceType <FlowLogsResourceType>
-TagSpecification <TagSpecification[]>
-TrafficType <TrafficType>
-ClientToken <String>
-Select <String>
-PassThru <SwitchParameter>
-Force <SwitchParameter>

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.

Note: For scripts written against earlier versions of this module this cmdlet can also be invoked with the alias, New-EC2FlowLogs.

Parameters

-ClientToken <String>
Unique, case-sensitive identifier that you provide to ensure the idempotency of the request. For more information, see How to Ensure Idempotency.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-DeliverLogsPermissionArn <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.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-Force <SwitchParameter>
This parameter overrides confirmation prompts to force the cmdlet to continue its operation. This parameter should always be used with caution.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-LogDestination <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. For example, to publish to a log group called my-logs, specify arn:aws:logs:us-east-1:123456789012:log-group:my-logs. Alternatively, use LogGroupName instead.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.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-LogDestinationType <LogDestinationType>
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
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-LogFormat <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.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-LogGroupName <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.
Required?False
Position?1
Accept pipeline input?True (ByValue, ByPropertyName)
-MaxAggregationInterval <Int32>
The maximum interval of time during which a flow of packets is captured and aggregated into a flow log record. You can specify 60 seconds (1 minute) or 600 seconds (10 minutes).When a network interface is attached to a Nitro-based instance, the aggregation interval is always 60 seconds or less, regardless of the value that you specify.Default: 600
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-PassThru <SwitchParameter>
Changes the cmdlet behavior to return the value passed to the LogGroupName parameter. The -PassThru parameter is deprecated, use -Select '^LogGroupName' instead. This parameter will be removed in a future version.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-ResourceId <String[]>
The ID of the subnet, network interface, or VPC for which you want to create a flow log.Constraints: Maximum of 1000 resources
Required?True
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesResourceIds
-ResourceType <FlowLogsResourceType>
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.
Required?True
Position?Named
Accept pipeline input?True (ByPropertyName)
-Select <String>
Use the -Select parameter to control the cmdlet output. The default value is '*'. Specifying -Select '*' will result in the cmdlet returning the whole service response (Amazon.EC2.Model.CreateFlowLogsResponse). Specifying the name of a property of type Amazon.EC2.Model.CreateFlowLogsResponse will result in that property being returned. Specifying -Select '^ParameterName' will result in the cmdlet returning the selected cmdlet parameter value.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-TagSpecification <TagSpecification[]>
The tags to apply to the flow logs.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesTagSpecifications
-TrafficType <TrafficType>
The type of traffic to log. You can log traffic that the resource accepts or rejects, or all traffic.
Required?True
Position?Named
Accept pipeline input?True (ByPropertyName)

Common Credential and Region Parameters

-AccessKey <String>
The AWS access key for the user account. This can be a temporary access key if the corresponding session token is supplied to the -SessionToken parameter.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesAK
-Credential <AWSCredentials>
An AWSCredentials object instance containing access and secret key information, and optionally a token for session-based credentials.
Required?False
Position?Named
Accept pipeline input?True (ByValue, ByPropertyName)
-EndpointUrl <String>
The endpoint to make the call against.Note: This parameter is primarily for internal AWS use and is not required/should not be specified for normal usage. The cmdlets normally determine which endpoint to call based on the region specified to the -Region parameter or set as default in the shell (via Set-DefaultAWSRegion). Only specify this parameter if you must direct the call to a specific custom endpoint.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-NetworkCredential <PSCredential>
Used with SAML-based authentication when ProfileName references a SAML role profile. Contains the network credentials to be supplied during authentication with the configured identity provider's endpoint. This parameter is not required if the user's default network identity can or should be used during authentication.
Required?False
Position?Named
Accept pipeline input?True (ByValue, ByPropertyName)
-ProfileLocation <String>
Used to specify the name and location of the ini-format credential file (shared with the AWS CLI and other AWS SDKs)If this optional parameter is omitted this cmdlet will search the encrypted credential file used by the AWS SDK for .NET and AWS Toolkit for Visual Studio first. If the profile is not found then the cmdlet will search in the ini-format credential file at the default location: (user's home directory)\.aws\credentials.If this parameter is specified then this cmdlet will only search the ini-format credential file at the location given.As the current folder can vary in a shell or during script execution it is advised that you use specify a fully qualified path instead of a relative path.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesAWSProfilesLocation, ProfilesLocation
-ProfileName <String>
The user-defined name of an AWS credentials or SAML-based role profile containing credential information. The profile is expected to be found in the secure credential file shared with the AWS SDK for .NET and AWS Toolkit for Visual Studio. You can also specify the name of a profile stored in the .ini-format credential file used with the AWS CLI and other AWS SDKs.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesStoredCredentials, AWSProfileName
-Region <Object>
The system name of an AWS region or an AWSRegion instance. This governs the endpoint that will be used when calling service operations. Note that the AWS resources referenced in a call are usually region-specific.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesRegionToCall
-SecretKey <String>
The AWS secret key for the user account. This can be a temporary secret key if the corresponding session token is supplied to the -SessionToken parameter.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesSK, SecretAccessKey
-SessionToken <String>
The session token if the access and secret keys are temporary session-based credentials.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesST

Outputs

Amazon.EC2.Model.CreateFlowLogsResponse
This cmdlet returns an Amazon.EC2.Model.CreateFlowLogsResponse object containing multiple properties. The object can also be referenced from properties attached to the cmdlet entry in the $AWSHistory stack.

Examples

Example 1

New-EC2FlowLog -ResourceId "subnet-1d234567" -LogDestinationType cloud-watch-logs -LogGroupName subnet1-log -TrafficType "REJECT" -ResourceType Subnet -DeliverLogsPermissionArn "arn:aws:iam::98765432109:role/Admin"

ClientToken                                  FlowLogIds             Unsuccessful
-----------                                  ----------             ------------
m1VN2cxP3iB4qo//VUKl5EU6cF7gQLOxcqNefvjeTGw= {fl-012fc34eed5678c9d} {}
This example creates EC2 flowlog for the subnet subnet-1d234567 to the cloud-watch-log named 'subnet1-log' for all 'REJECT' traffic using the perimssions of the 'Admin' role
User Guide
Service API Reference
Microsoft Windows Guide
VPC User Guide
AWS Tools for PowerShell User Guide

Supported Version

AWS Tools for PowerShell: 2.x.y.z