SignalResource
Sends a signal to the specified resource with a success or failure status. You can use the
SignalResource
operation in conjunction with a creation policy or update
policy. CloudFormation doesn't proceed with a stack creation or update until resources receive the
required number of signals or the timeout period is exceeded. The SignalResource
operation is useful in cases where you want to send signals from anywhere other than an Amazon EC2
instance.
Request Parameters
For information about the parameters that are common to all actions, see Common Parameters.
- LogicalResourceId
-
The logical ID of the resource that you want to signal. The logical ID is the name of the resource that given in the template.
Type: String
Required: Yes
- StackName
-
The stack name or unique stack ID that includes the resource that you want to signal.
Type: String
Length Constraints: Minimum length of 1.
Pattern:
([a-zA-Z][-a-zA-Z0-9]*)|(arn:\b(aws|aws-us-gov|aws-cn)\b:[-a-zA-Z0-9:/._+]*)
Required: Yes
- Status
-
The status of the signal, which is either success or failure. A failure signal causes CloudFormation to immediately fail the stack creation or update.
Type: String
Valid Values:
SUCCESS | FAILURE
Required: Yes
- UniqueId
-
A unique ID of the signal. When you signal Amazon EC2 instances or Auto Scaling groups, specify the instance ID that you are signaling as the unique ID. If you send multiple signals to a single resource (such as signaling a wait condition), each signal requires a different unique ID.
Type: String
Length Constraints: Minimum length of 1. Maximum length of 64.
Required: Yes
Errors
For information about the errors that are common to all actions, see Common Errors.
Examples
SignalResource
This example illustrates one usage of SignalResource.
Sample Request
https://cloudformation.us-east-1.amazonaws.com/
?Action=SignalResource
&LogicalResourceId=MyWaitCondition
&StackName=AWaitingTestStack
&Status=SUCCESS
&UniqueId=test-signal
&Version=2010-05-15
&SignatureVersion=2
&Timestamp=2010-07-27T22%3A26%3A28.000Z
&AWSAccessKeyId=[AWS Access KeyID]
&Signature=[Signature]
Sample Response
<SignalResourceResponse xmlns="http://cloudformation.amazonaws.com/doc/2010-05-15/">
<ResponseMetadata>
<RequestId>e7d8c346-744b-11e5-b40b-example</RequestId>
</ResponseMetadata>
</SignalResourceResponse>
See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following: