CfnAlias¶
-
class
aws_cdk.aws_lambda.
CfnAlias
(scope, id, *, function_name, function_version, name, description=None, provisioned_concurrency_config=None, routing_config=None)¶ Bases:
aws_cdk.core.CfnResource
A CloudFormation
AWS::Lambda::Alias
.The
AWS::Lambda::Alias
resource creates an alias for a Lambda function version. Use aliases to provide clients with a function identifier that you can update to invoke a different version.You can also map an alias to split invocation requests between two versions. Use the
RoutingConfig
parameter to specify a second version and the percentage of invocation requests that it receives.- CloudformationResource
AWS::Lambda::Alias
- Link
http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-lambda-alias.html
- ExampleMetadata
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_lambda as lambda_ cfn_alias = lambda_.CfnAlias(self, "MyCfnAlias", function_name="functionName", function_version="functionVersion", name="name", # the properties below are optional description="description", provisioned_concurrency_config=lambda.CfnAlias.ProvisionedConcurrencyConfigurationProperty( provisioned_concurrent_executions=123 ), routing_config=lambda.CfnAlias.AliasRoutingConfigurationProperty( additional_version_weights=[lambda.CfnAlias.VersionWeightProperty( function_version="functionVersion", function_weight=123 )] ) )
Create a new
AWS::Lambda::Alias
.- Parameters
scope (
Construct
) –scope in which this resource is defined.
id (
str
) –scoped id of the resource.
function_name (
str
) – The name of the Lambda function. Name formats - Function name -MyFunction
. - Function ARN -arn:aws:lambda:us-west-2:123456789012:function:MyFunction
. - Partial ARN -123456789012:function:MyFunction
. The length constraint applies only to the full ARN. If you specify only the function name, it is limited to 64 characters in length.function_version (
str
) – The function version that the alias invokes.name (
str
) – The name of the alias.description (
Optional
[str
]) – A description of the alias.provisioned_concurrency_config (
Union
[ProvisionedConcurrencyConfigurationProperty
,IResolvable
,None
]) – Specifies a provisioned concurrency configuration for a function’s alias.routing_config (
Union
[IResolvable
,AliasRoutingConfigurationProperty
,None
]) – The routing configuration of the alias.
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_depends_on
(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_metadata
(key, value)¶ Add a value to the CloudFormation Resource Metadata.
- Parameters
key (
str
) –value (
Any
) –
- See
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.
- Return type
None
-
add_override
(path, value)¶ Adds an override to the synthesized CloudFormation resource.
To add a property override, either use
addPropertyOverride
or prefixpath
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 toaddOverride
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 intermdediate 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
).- Parameters
policy (
Optional
[RemovalPolicy
]) –apply_to_update_replace_policy (
Optional
[bool
]) – Apply the same deletion policy to the resource’s “UpdateReplacePolicy”. Default: truedefault (
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 resoure, please consult that specific resource’s documentation.
- Return type
None
-
get_att
(attribute_name)¶ 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.- Return type
-
get_metadata
(key)¶ Retrieve a value value from the CloudFormation Resource Metadata.
- Parameters
key (
str
) –- See
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.
- Return type
Any
-
inspect
(inspector)¶ Examines the CloudFormation resource and discloses attributes.
- Parameters
inspector (
TreeInspector
) –tree inspector to collect and process attributes.
- Return type
None
-
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
-
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::Lambda::Alias'¶
-
cfn_options
¶ Options for this resource, such as condition, update policy etc.
- Return type
-
cfn_resource_type
¶ AWS resource type.
- Return type
str
-
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.
- Return type
List
[str
]
-
description
¶ A description of the alias.
- Link
- Return type
Optional
[str
]
-
function_name
¶ The name of the Lambda function.
Name formats - Function name -
MyFunction
.Function ARN -
arn:aws:lambda:us-west-2:123456789012:function:MyFunction
.Partial ARN -
123456789012:function:MyFunction
.
The length constraint applies only to the full ARN. If you specify only the function name, it is limited to 64 characters in length.
-
function_version
¶ The function version that the alias invokes.
-
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)
.- Return type
str
- Returns
the logical ID as a stringified token. This value will only get resolved during synthesis.
-
name
¶ The name of the alias.
-
node
¶ The construct tree node associated with this construct.
- Return type
-
provisioned_concurrency_config
¶ //docs.aws.amazon.com/lambda/latest/dg/configuration-concurrency.html>`_ configuration for a function’s alias.
- Link
- Type
Specifies a `provisioned concurrency <https
- Return type
Union
[ProvisionedConcurrencyConfigurationProperty
,IResolvable
,None
]
-
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 })
.- Return type
str
-
routing_config
¶ //docs.aws.amazon.com/lambda/latest/dg/lambda-traffic-shifting-using-aliases.html>`_ of the alias.
- Link
- Type
The `routing configuration <https
- Return type
Union
[IResolvable
,AliasRoutingConfigurationProperty
,None
]
-
stack
¶ The stack in which this element is defined.
CfnElements must be defined within a stack scope (directly or indirectly).
- Return type
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
(construct)¶ Check whether the given construct is a CfnResource.
- Parameters
construct (
IConstruct
) –- Return type
bool
-
classmethod
is_construct
(x)¶ Return whether the given object is a Construct.
- Parameters
x (
Any
) –- Return type
bool
AliasRoutingConfigurationProperty¶
-
class
CfnAlias.
AliasRoutingConfigurationProperty
(*, additional_version_weights)¶ Bases:
object
The traffic-shifting configuration of a Lambda function alias.
- Parameters
additional_version_weights (
Union
[IResolvable
,Sequence
[Union
[IResolvable
,VersionWeightProperty
]]]) – The second version, and the percentage of traffic that’s routed to it.- Link
- ExampleMetadata
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_lambda as lambda_ alias_routing_configuration_property = lambda.CfnAlias.AliasRoutingConfigurationProperty( additional_version_weights=[lambda.CfnAlias.VersionWeightProperty( function_version="functionVersion", function_weight=123 )] )
Attributes
-
additional_version_weights
¶ The second version, and the percentage of traffic that’s routed to it.
ProvisionedConcurrencyConfigurationProperty¶
-
class
CfnAlias.
ProvisionedConcurrencyConfigurationProperty
(*, provisioned_concurrent_executions)¶ Bases:
object
A provisioned concurrency configuration for a function’s alias.
- Parameters
provisioned_concurrent_executions (
Union
[int
,float
]) – The amount of provisioned concurrency to allocate for the alias.- Link
- ExampleMetadata
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_lambda as lambda_ provisioned_concurrency_configuration_property = lambda.CfnAlias.ProvisionedConcurrencyConfigurationProperty( provisioned_concurrent_executions=123 )
Attributes
-
provisioned_concurrent_executions
¶ The amount of provisioned concurrency to allocate for the alias.
VersionWeightProperty¶
-
class
CfnAlias.
VersionWeightProperty
(*, function_version, function_weight)¶ Bases:
object
The traffic-shifting configuration of a Lambda function alias.
- Parameters
function_version (
str
) – The qualifier of the second version.function_weight (
Union
[int
,float
]) – The percentage of traffic that the alias routes to the second version.
- Link
- ExampleMetadata
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_lambda as lambda_ version_weight_property = lambda.CfnAlias.VersionWeightProperty( function_version="functionVersion", function_weight=123 )
Attributes
-
function_version
¶ The qualifier of the second version.
-
function_weight
¶ The percentage of traffic that the alias routes to the second version.