CfnFlowLog

class aws_cdk.aws_ec2.CfnFlowLog(scope, id, *, resource_id, resource_type, deliver_cross_account_role=None, deliver_logs_permission_arn=None, destination_options=None, log_destination=None, log_destination_type=None, log_format=None, log_group_name=None, max_aggregation_interval=None, tags=None, traffic_type=None)

Bases: CfnResource

Specifies a VPC flow log that captures IP traffic for a specified network interface, subnet, or VPC.

To view the log data, use Amazon CloudWatch Logs (CloudWatch Logs) to help troubleshoot connection issues. For example, you can use a flow log to investigate why certain traffic isn’t reaching an instance, which can help you diagnose overly restrictive security group rules. For more information, see VPC Flow Logs in the Amazon VPC User Guide .

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-flowlog.html

CloudformationResource:

AWS::EC2::FlowLog

ExampleMetadata:

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
from aws_cdk import aws_ec2 as ec2

# destination_options: Any

cfn_flow_log = ec2.CfnFlowLog(self, "MyCfnFlowLog",
    resource_id="resourceId",
    resource_type="resourceType",

    # the properties below are optional
    deliver_cross_account_role="deliverCrossAccountRole",
    deliver_logs_permission_arn="deliverLogsPermissionArn",
    destination_options=destination_options,
    log_destination="logDestination",
    log_destination_type="logDestinationType",
    log_format="logFormat",
    log_group_name="logGroupName",
    max_aggregation_interval=123,
    tags=[CfnTag(
        key="key",
        value="value"
    )],
    traffic_type="trafficType"
)
Parameters:
  • scope (Construct) – Scope in which this resource is defined.

  • id (str) – Construct identifier for this resource (unique in its scope).

  • resource_id (str) – The ID of the resource to monitor. For example, if the resource type is VPC , specify the ID of the VPC.

  • resource_type (str) – The type of resource to monitor.

  • deliver_cross_account_role (Optional[str]) – The ARN of the IAM role that allows the service to publish flow logs across accounts.

  • deliver_logs_permission_arn (Optional[str]) – The ARN of the IAM role that allows Amazon EC2 to publish flow logs to the log destination. This parameter is required if the destination type is cloud-watch-logs , or if the destination type is kinesis-data-firehose and the delivery stream and the resources to monitor are in different accounts.

  • destination_options (Optional[Any]) – The destination options.

  • log_destination (Optional[str]) – The destination for the flow log data. The meaning of this parameter depends on the destination type. - If the destination type is cloud-watch-logs , specify the ARN of a CloudWatch Logs log group. For example: arn:aws:logs: region : account_id :log-group: my_group Alternatively, use the LogGroupName parameter. - If the destination type is s3 , specify the ARN of an S3 bucket. For example: arn:aws:s3::: my_bucket / my_subfolder / The subfolder is optional. Note that you can’t use AWSLogs as a subfolder name. - If the destination type is kinesis-data-firehose , specify the ARN of a Kinesis Data Firehose delivery stream. For example: arn:aws:firehose: region : account_id :deliverystream: my_stream

  • log_destination_type (Optional[str]) – The type of destination for the flow log data. Default: cloud-watch-logs

  • log_format (Optional[str]) – The fields to include in the flow log record, in the order in which they should appear. If you omit this parameter, the flow log is created using the default format. If you specify this parameter, you must include at least one field. For more information about the available fields, see Flow log records in the Amazon VPC User Guide or Transit Gateway Flow Log records in the AWS Transit Gateway Guide . Specify the fields using the ${field-id} format, separated by spaces.

  • log_group_name (Optional[str]) – The name of a new or existing CloudWatch Logs log group where Amazon EC2 publishes your flow logs. This parameter is valid only if the destination type is cloud-watch-logs .

  • max_aggregation_interval (Union[int, float, None]) – The maximum interval of time during which a flow of packets is captured and aggregated into a flow log record. The possible values are 60 seconds (1 minute) or 600 seconds (10 minutes). This parameter must be 60 seconds for transit gateway resource types. 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

  • tags (Optional[Sequence[Union[CfnTag, Dict[str, Any]]]]) – The tags to apply to the flow logs.

  • traffic_type (Optional[str]) – The type of traffic to monitor (accepted traffic, rejected traffic, or all traffic). This parameter is not supported for transit gateway resource types. It is required for the other resource types.

Methods

add_deletion_override(path)

Syntactic sugar for addOverride(path, undefined).

Parameters:

path (str) – The path of the value to delete.

Return type:

None

add_dependency(target)

Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

This can be used for resources across stacks (or nested stack) boundaries and the dependency will automatically be transferred to the relevant scope.

Parameters:

target (CfnResource) –

Return type:

None

add_depends_on(target)

(deprecated) Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

Parameters:

target (CfnResource) –

Deprecated:

use addDependency

Stability:

deprecated

Return type:

None

add_metadata(key, value)

Add a value to the CloudFormation Resource Metadata.

Parameters:
  • key (str) –

  • value (Any) –

See:

Return type:

None

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

add_override(path, value)

Adds an override to the synthesized CloudFormation resource.

To add a property override, either use addPropertyOverride or prefix path with “Properties.” (i.e. Properties.TopicName).

If the override is nested, separate each nested level using a dot (.) in the path parameter. If there is an array as part of the nesting, specify the index in the path.

To include a literal . in the property name, prefix with a \. In most programming languages you will need to write this as "\\." because the \ itself will need to be escaped.

For example:

cfn_resource.add_override("Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes", ["myattribute"])
cfn_resource.add_override("Properties.GlobalSecondaryIndexes.1.ProjectionType", "INCLUDE")

would add the overrides Example:

"Properties": {
  "GlobalSecondaryIndexes": [
    {
      "Projection": {
        "NonKeyAttributes": [ "myattribute" ]
        ...
      }
      ...
    },
    {
      "ProjectionType": "INCLUDE"
      ...
    },
  ]
  ...
}

The value argument to addOverride will not be processed or translated in any way. Pass raw JSON values in here with the correct capitalization for CloudFormation. If you pass CDK classes or structs, they will be rendered with lowercased key names, and CloudFormation will reject the template.

Parameters:
  • path (str) –

    • The path of the property, you can use dot notation to override values in complex types. Any intermediate keys will be created as needed.

  • value (Any) –

    • The value. Could be primitive or complex.

Return type:

None

add_property_deletion_override(property_path)

Adds an override that deletes the value of a property from the resource definition.

Parameters:

property_path (str) – The path to the property.

Return type:

None

add_property_override(property_path, value)

Adds an override to a resource property.

Syntactic sugar for addOverride("Properties.<...>", value).

Parameters:
  • property_path (str) – The path of the property.

  • value (Any) – The value.

Return type:

None

apply_removal_policy(policy=None, *, apply_to_update_replace_policy=None, default=None)

Sets the deletion policy of the resource based on the removal policy specified.

The Removal Policy controls what happens to this resource when it stops being managed by CloudFormation, either because you’ve removed it from the CDK application or because you’ve made a change that requires the resource to be replaced.

The resource can be deleted (RemovalPolicy.DESTROY), or left in your AWS account for data recovery and cleanup later (RemovalPolicy.RETAIN). In some cases, a snapshot can be taken of the resource prior to deletion (RemovalPolicy.SNAPSHOT). A list of resources that support this policy can be found in the following link:

Parameters:
  • policy (Optional[RemovalPolicy]) –

  • apply_to_update_replace_policy (Optional[bool]) – Apply the same deletion policy to the resource’s “UpdateReplacePolicy”. Default: true

  • default (Optional[RemovalPolicy]) – The default policy to apply in case the removal policy is not defined. Default: - Default value is resource specific. To determine the default value for a resource, please consult that specific resource’s documentation.

See:

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html#aws-attribute-deletionpolicy-options

Return type:

None

get_att(attribute_name, type_hint=None)

Returns a token for an runtime attribute of this resource.

Ideally, use generated attribute accessors (e.g. resource.arn), but this can be used for future compatibility in case there is no generated attribute.

Parameters:
  • attribute_name (str) – The name of the attribute.

  • type_hint (Optional[ResolutionTypeHint]) –

Return type:

Reference

get_metadata(key)

Retrieve a value value from the CloudFormation Resource Metadata.

Parameters:

key (str) –

See:

Return type:

Any

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

inspect(inspector)

Examines the CloudFormation resource and discloses attributes.

Parameters:

inspector (TreeInspector) – tree inspector to collect and process attributes.

Return type:

None

obtain_dependencies()

Retrieves an array of resources this resource depends on.

This assembles dependencies on resources across stacks (including nested stacks) automatically.

Return type:

List[Union[Stack, CfnResource]]

obtain_resource_dependencies()

Get a shallow copy of dependencies between this resource and other resources in the same stack.

Return type:

List[CfnResource]

override_logical_id(new_logical_id)

Overrides the auto-generated logical ID with a specific ID.

Parameters:

new_logical_id (str) – The new logical ID to use for this stack element.

Return type:

None

remove_dependency(target)

Indicates that this resource no longer depends on another resource.

This can be used for resources across stacks (including nested stacks) and the dependency will automatically be removed from the relevant scope.

Parameters:

target (CfnResource) –

Return type:

None

replace_dependency(target, new_target)

Replaces one dependency with another.

Parameters:
Return type:

None

to_string()

Returns a string representation of this construct.

Return type:

str

Returns:

a string representation of this resource

Attributes

CFN_RESOURCE_TYPE_NAME = 'AWS::EC2::FlowLog'
attr_id

The ID of the flow log.

For example, fl-123456abc123abc1 .

CloudformationAttribute:

Id

cfn_options

Options for this resource, such as condition, update policy etc.

cfn_resource_type

AWS resource type.

creation_stack

return:

the stack trace of the point where this Resource was created from, sourced from the +metadata+ entry typed +aws:cdk:logicalId+, and with the bottom-most node +internal+ entries filtered.

deliver_cross_account_role

The ARN of the IAM role that allows the service to publish flow logs across accounts.

deliver_logs_permission_arn

The ARN of the IAM role that allows Amazon EC2 to publish flow logs to the log destination.

destination_options

The destination options.

log_destination

The destination for the flow log data.

The meaning of this parameter depends on the destination type.

log_destination_type

The type of destination for the flow log data.

log_format

The fields to include in the flow log record, in the order in which they should appear.

log_group_name

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

logical_id

The logical ID for this CloudFormation stack element.

The logical ID of the element is calculated from the path of the resource node in the construct tree.

To override this value, use overrideLogicalId(newLogicalId).

Returns:

the logical ID as a stringified token. This value will only get resolved during synthesis.

max_aggregation_interval

The maximum interval of time during which a flow of packets is captured and aggregated into a flow log record.

node

The tree node.

ref

Return a string that will be resolved to a CloudFormation { Ref } for this element.

If, by any chance, the intrinsic reference of a resource is not a string, you could coerce it to an IResolvable through Lazy.any({ produce: resource.ref }).

resource_id

The ID of the resource to monitor.

resource_type

The type of resource to monitor.

stack

The stack in which this element is defined.

CfnElements must be defined within a stack scope (directly or indirectly).

tags

Tag Manager which manages the tags for this resource.

tags_raw

The tags to apply to the flow logs.

traffic_type

The type of traffic to monitor (accepted traffic, rejected traffic, or all traffic).

Static Methods

classmethod is_cfn_element(x)

Returns true if a construct is a stack element (i.e. part of the synthesized cloudformation template).

Uses duck-typing instead of instanceof to allow stack elements from different versions of this library to be included in the same stack.

Parameters:

x (Any) –

Return type:

bool

Returns:

The construct as a stack element or undefined if it is not a stack element.

classmethod is_cfn_resource(x)

Check whether the given object is a CfnResource.

Parameters:

x (Any) –

Return type:

bool

classmethod is_construct(x)

Checks if x is a construct.

Use this method instead of instanceof to properly detect Construct instances, even when the construct library is symlinked.

Explanation: in JavaScript, multiple copies of the constructs library on disk are seen as independent, completely different libraries. As a consequence, the class Construct in each copy of the constructs library is seen as a different class, and an instance of one class will not test as instanceof the other class. npm install will not create installations like this, but users may manually symlink construct libraries together or use a monorepo tool: in those cases, multiple copies of the constructs library can be accidentally installed, and instanceof will behave unpredictably. It is safest to avoid using instanceof, and using this type-testing method instead.

Parameters:

x (Any) – Any object.

Return type:

bool

Returns:

true if x is an object created from a class which extends Construct.

DestinationOptionsProperty

class CfnFlowLog.DestinationOptionsProperty(*, file_format, hive_compatible_partitions, per_hour_partition)

Bases: object

Describes the destination options for a flow log.

Parameters:
  • file_format (str) – The format for the flow log. The default is plain-text .

  • hive_compatible_partitions (Union[bool, IResolvable]) – Indicates whether to use Hive-compatible prefixes for flow logs stored in Amazon S3. The default is false .

  • per_hour_partition (Union[bool, IResolvable]) – Indicates whether to partition the flow log per hour. This reduces the cost and response time for queries. The default is false .

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-flowlog-destinationoptions.html

ExampleMetadata:

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
from aws_cdk import aws_ec2 as ec2

destination_options_property = ec2.CfnFlowLog.DestinationOptionsProperty(
    file_format="fileFormat",
    hive_compatible_partitions=False,
    per_hour_partition=False
)

Attributes

file_format

The format for the flow log.

The default is plain-text .

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-flowlog-destinationoptions.html#cfn-ec2-flowlog-destinationoptions-fileformat

hive_compatible_partitions

Indicates whether to use Hive-compatible prefixes for flow logs stored in Amazon S3.

The default is false .

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-flowlog-destinationoptions.html#cfn-ec2-flowlog-destinationoptions-hivecompatiblepartitions

per_hour_partition

Indicates whether to partition the flow log per hour.

This reduces the cost and response time for queries. The default is false .

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-flowlog-destinationoptions.html#cfn-ec2-flowlog-destinationoptions-perhourpartition