I am trying to create a ECS cluster (fib-cluster-10) with min 1 instance, using the following settings under “infrastructure”:

the ecsInstanceRole has the following policy JSON:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeTags",
                "ecs:CreateCluster",
                "ecs:DeregisterContainerInstance",
                "ecs:DiscoverPollEndpoint",
                "ecs:Poll",
                "ecs:RegisterContainerInstance",
                "ecs:StartTelemetrySession",
                "ecs:UpdateContainerInstancesState",
                "ecs:Submit*",
                "ecr:GetAuthorizationToken",
                "ecr:BatchCheckLayerAvailability",
                "ecr:GetDownloadUrlForLayer",
                "ecr:BatchGetImage",
                "logs:CreateLogStream",
                "logs:PutLogEvents"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": "ecs:TagResource",
            "Resource": "*",
            "Condition": {
                "StringEquals": {
                    "ecs:CreateAction": [
                        "CreateCluster",
                        "RegisterContainerInstance"
                    ]
                }
            }
        }
    ]
}

I’ve created a VPC with 2 private subnets, 2 public subnets
(and a security group to allow all TCP on the private subnets).

When creating the cluster, I select the private subnets:

(the other optional stuff I left out).

When I hit create, I get 0 instances associated to the cluster:

(when I then try and deploy a TaskDefinition using a service, I get error saying my cluster has no instances)