AWS ECS cluster Capacity Provider

Question

I'm using this cloudformation template to create capacity providers for ECS cluster with the autoscaling group specified in the ecs capacity provider:

"ECSCapacityProvider": {
            "Type": "AWS::ECS::CapacityProvider",
            "Properties": {
                "AutoScalingGroupProvider": {
                    "AutoScalingGroupArn": { "Ref" : "AutoScalingGroup" }
                }
            },
            "DependsOn" : "AutoScalingGroup" 
        },
        "DRCluster": {
            "Type": "AWS::ECS::Cluster",
            "Properties": {
                "ClusterName": { "Ref" : "WindowsECSCluster" },
                "CapacityProviders" : "ECSCapacityProvider",
                "Tags": [
                    {
                        "Key": "environment",
                        "Value": "dr"
                    }
                ]
            },
            "DependsOn" : "ECSCapacityProvider" 
        }

But while creating the stack it resulted in the following error:

Model validation failed (#/CapacityProviders: expected type: JSONArray, found: String)

I could not find proper documentation for the capacity providers. I'm using it to attach the Auto Scaling group to the cluster, which i hope is the correct way to do so. I'm new to cloudformation, any help is much appreciated.

Marcin Marcin · Accepted Answer · 2020-08-21T23:44:48

CapacityProviders is a List of String, not a String like you have now:

"CapacityProviders" : "ECSCapacityProvider",

Therefore, in you DRCluster you can use the following instead:

"CapacityProviders" : [ {"Ref": "ECSCapacityProvider"} ],

AWS ECS cluster Capacity Provider

1 Answers