ecsのクラスタがFargate Spotで100%実行する設定

Fargateは非常に便利

だけど開発や試験的に使うだけなら、70%OFFの料金のFargate Spotでお安く使いたい。クラスタの設定を必ずFargate Spotで実行する設定の仕方は以下です。

cluster名がseleniumの場合

$ aws ecs put-cluster-capacity-providers --cluster selenium --capacity-providers FARGATE_SPOT FARGATE --default-capacity-provider-strategy capacityProvider=FARGATE_SPOT,weight=1,base=1

以下のコマンドで確認する
defaultCapacityProviderStrategyが追加されたらOK

$ aws ecs describe-clusters --clusters selenium
{
    "clusters": [
        {
            "clusterArn": "arn:aws:ecs:ap-northeast-1:999999999999:cluster/selenium",
            "clusterName": "selenium",
            "status": "ACTIVE",
            "registeredContainerInstancesCount": 0,
            "runningTasksCount": 0,
            "pendingTasksCount": 0,
            "activeServicesCount": 0,
            "statistics": [],
            "tags": [],
            "settings": [
                {
                    "name": "containerInsights",
                    "value": "disabled"
                }
            ],
            "capacityProviders": [
                "FARGATE_SPOT",
                "FARGATE"
            ],
            "defaultCapacityProviderStrategy": [
                {
                    "capacityProvider": "FARGATE_SPOT",
                    "weight": 1,
                    "base": 1
                }
            ]
        }
    ],
    "failures": []
}