Cloudformation Trigger Event for Existing bucket

Question

I am trying to write a cloudformation template which involves adding an event to a bucket to trigger a lambda function.

I know i can use code such as the below to create a bucket and an event at the same time but my bucket already exists and i don't want another one so is there a way of creating an event for an existing bucket within cloud formation?

"EncryptionServiceBucket" : {
  "Type" : "AWS::S3::Bucket",
  "Properties" : {
    "BucketName" : { "Fn::Sub" : "${User}-encryption-service" },
    "NotificationConfiguration" : {
      "LambdaConfigurations" : [{
        "Function" : { "Ref" : "LambdaDeploymentArn" },
        "Event" : "s3:ObjectCreated:*",
        "Filter" : {
          "S3Key" : {
            "Rules" : [{
              "Name" : "suffix",
              "Value" : "zip"
            }]
          }
        }
      }]
    }
  }
}

kino1 kino1 · Accepted Answer · 2018-06-02T23:04:20

I have not found a way to manage existing resources with CloudFormation. Also, using the BucketName property on a bucket limits CloudFormation's ability to manage your bucket significantly. For example, it cannot replace the resource, or create it again in another stack in your account. I suggest instead to leave out this property, let Cloudformation create bucket names and reference the bucket's ARNs in your with via environment variables set in the same stack.

Cloudformation Trigger Event for Existing bucket

1 Answers