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Class: Aws::CloudFormation::Types::ResourceChangeDetail
- Inherits:
-
Struct
- Object
- Struct
- Aws::CloudFormation::Types::ResourceChangeDetail
- Defined in:
- (unknown)
Overview
For a resource with Modify
as the action, the ResourceChange
structure describes the changes AWS CloudFormation will make to that resource.
Instance Attribute Summary collapse
-
#causing_entity ⇒ String
The identity of the entity that triggered this change.
-
#change_source ⇒ String
The group to which the
CausingEntity
value belongs. -
#evaluation ⇒ String
Indicates whether AWS CloudFormation can determine the target value, and whether the target value will change before you execute a change set.
-
#target ⇒ Types::ResourceTargetDefinition
A
ResourceTargetDefinition
structure that describes the field that AWS CloudFormation will change and whether the resource will be recreated.
Instance Attribute Details
#causing_entity ⇒ String
The identity of the entity that triggered this change. This entity is a
member of the group that is specified by the ChangeSource
field. For
example, if you modified the value of the KeyPairName
parameter, the
CausingEntity
is the name of the parameter (KeyPairName
).
If the ChangeSource
value is DirectModification
, no value is given
for CausingEntity
.
#change_source ⇒ String
The group to which the CausingEntity
value belongs. There are five
entity groups:
ResourceReference
entities areRef
intrinsic functions that refer to resources in the template, such as{ "Ref" : "MyEC2InstanceResource" }
.ParameterReference
entities areRef
intrinsic functions that get template parameter values, such as{ "Ref" : "MyPasswordParameter" }
.ResourceAttribute
entities areFn::GetAtt
intrinsic functions that get resource attribute values, such as{ "Fn::GetAtt" : [ "MyEC2InstanceResource", "PublicDnsName" ] }
.DirectModification
entities are changes that are made directly to the template.Automatic
entities areAWS::CloudFormation::Stack
resource types, which are also known as nested stacks. If you made no changes to theAWS::CloudFormation::Stack
resource, AWS CloudFormation sets theChangeSource
toAutomatic
because the nested stack\'s template might have changed. Changes to a nested stack\'s template aren\'t visible to AWS CloudFormation until you run an update on the parent stack.Possible values:
- ResourceReference
- ParameterReference
- ResourceAttribute
- DirectModification
- Automatic
#evaluation ⇒ String
Indicates whether AWS CloudFormation can determine the target value, and whether the target value will change before you execute a change set.
For Static
evaluations, AWS CloudFormation can determine that the
target value will change, and its value. For example, if you directly
modify the InstanceType
property of an EC2 instance, AWS
CloudFormation knows that this property value will change, and its
value, so this is a Static
evaluation.
For Dynamic
evaluations, cannot determine the target value because it
depends on the result of an intrinsic function, such as a Ref
or
Fn::GetAtt
intrinsic function, when the stack is updated. For example,
if your template includes a reference to a resource that is
conditionally recreated, the value of the reference (the physical ID of
the resource) might change, depending on if the resource is recreated.
If the resource is recreated, it will have a new physical ID, so all
references to that resource will also be updated.
Possible values:
- Static
- Dynamic
#target ⇒ Types::ResourceTargetDefinition
A ResourceTargetDefinition
structure that describes the field that AWS
CloudFormation will change and whether the resource will be recreated.