Update SSM parameter in a different stack than the creation. Using AWS CDK

Question

Hi,

I would like to create an SSM parameter with a dummy value in one stack and update it with Lambda function name, after the lambda is created in a different stack. I have tried using  ssm.putParameter (ssm from aws-sdk). using custom resource. But it did not work as expected. Is there any other way that I can try to make this happen?
Please let me know if you want more information.

Thanks,
Indu.

Didier Durand · Answer

Hi, 
you have to use the overwrite option of the Put Parameter API of SSM to do an update. Example with CLI:
`ssm put-parameter --name "test123" --type "String" --value "MyValue" --overwrite`

See reference doc: https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ssm/put-parameter.html

You will also find this option with any language SDK published by AWS as it is delivered by the service endpont API: https://docs.aws.amazon.com/systems-manager/latest/APIReference/API_PutParameter.html

Best,

Didier

Update SSM parameter in a different stack than the creation. Using AWS CDK

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