CODEWITHSUNDEEP
amazon-ecs
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Reputation: 63

Retrieving the ResourceId of a scaleable target

In the AWS Resource AWS::ApplicationAutoScaling::ScalableTarget, how do I retrieve the value of ResourceId which is the unique resource identifier that associated with the scaleable target?

The format used in the ResourceId property is service/cluster_name/service_name.

Upvotes: 3

Views: 2354

Answers (2)

Lee Netherton
Lee Netherton

Reputation: 22532

You are correct that the ResourceId property should be in the form service/<cluster_name>/<service_name>.

Incidentally, (and to help future Googlers) the error message that you get when you use an incorrect ResourceId or ScalableDimension is:

Unsupported service namespace, resource type or scalable dimension

To achieve this in CloudFormation you can use a Fn::Join for the ResourceId. Here is a snippet of the Scalable target that I am using:

"ECSServiceScalableTarget": {
    "Type": "AWS::ApplicationAutoScaling::ScalableTarget",
    "Properties": {
        "MaxCapacity": 5,
        "MinCapacity": 1,
        "ResourceId": { "Fn::Join" : ["/", [
            "service",
            { "Ref": "ECSCluster" },
            { "Fn::GetAtt" : ["ECSService", "Name"] }
        ]]},
        "RoleARN": { "Fn::Join" : ["", ["arn:aws:iam::", { "Ref" : "AWS::AccountId" }, ":role/ApplicationAutoscalingECSRole"]]},
        "ScalableDimension": "ecs:service:DesiredCount",
        "ServiceNamespace": "ecs"
    }
}

Upvotes: 2

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Reputation: 63

I use the {"Fn::Join" : [ ":", [ "a", "b", "c" ] ]"} to get the value of the "ResourceId".

Upvotes: 0

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