分析情報と推奨事項を使用して、アイドル状態の Google Kubernetes Engine(GKE)Standard クラスタを特定できます。特定したアイドル状態のクラスタが使用されていないことを確認したら、それらを削除して費用を節約できます。推奨事項には、可能であれば、クラスタを削除した場合の予想される月間の削減額が含まれます。詳細については、アイドル状態のクラスタの費用見積もりを理解するをご覧ください。
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["わかりにくい","hardToUnderstand","thumb-down"],["情報またはサンプルコードが不正確","incorrectInformationOrSampleCode","thumb-down"],["必要な情報 / サンプルがない","missingTheInformationSamplesINeed","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-07-11 UTC。"],[],[],null,["# Identify idle GKE clusters\n\n[Standard](/kubernetes-engine/docs/concepts/choose-cluster-mode)\n\n*** ** * ** ***\n\nYou can identify idle Google Kubernetes Engine (GKE) Standard clusters\nusing insights and recommendations. After you verify that the identified idle\nclusters are unused, you can delete them to save costs. If possible, the\nrecommendation includes projected monthly savings for deleting a cluster. For\nmore information, see [Understand cost estimation for idle\nclusters](#cost-estimate).\n\nGKE provides insights and recommendations for cost optimization\nscenarios such as underprovisioned clusters, overprovisioned clusters, and idle\nclusters, with corresponding recommendations to scale up, scale down, or delete\nthe clusters. This page explains how to identify idle clusters. See also,\n[Identify underprovisioned and overprovisioned GKE\nclusters](/kubernetes-engine/docs/how-to/optimize-cluster-utilization).\n\nGKE doesn't provide insights for Autopilot\nclusters, which incur minimal operational costs as you only pay for the\nresources that your workloads request. For more information, see\n[Autopilot\nPricing](/kubernetes-engine/docs/concepts/autopilot-overview#pricing).\n\nGKE monitors your clusters and delivers guidance to optimize your\nusage through [Active Assist](/recommender/docs/whatis-activeassist), a\nservice that provides recommenders that generate insights and recommendations\nfor using resources on Google Cloud.\n\nFor more information about how to manage insights and recommendations, see\n[Optimize your usage of GKE with insights and recommendations](/kubernetes-engine/docs/how-to/optimize-with-recommenders).\n\nIdentify idle clusters\n----------------------\n\nTo identify idle clusters, [view insights and\nrecommendations](/kubernetes-engine/docs/how-to/optimize-with-recommenders#view-insights-recs)\nusing the Google Cloud console, the Google Cloud CLI, or the Recommender API. Use\nthe insight subtypes shown in [the table in the following\nsection](#how-idle-clusters) and the `CLUSTER_IDLE` recommendation subtype. In\nthe console, these insights appear in the **Cost Optimization**\ntab on the **Clusters** page.\n\nAfter you identify idle clusters, see the [considerations when deleting idle\nclusters](#idle-cluster-considerations).\n\nHow GKE identifies idle clusters\n--------------------------------\n\nGKE uses utilization signals to determine whether you receive an\ninsight and recommendation.\n\nThe following table describes the signals that GKE uses and the\nthreshold for each signal. Each signal triggers an independent insight. If a\ncluster has multiple insights, GKE displays a single\nrecommendation.\n\nGKE doesn't send recommendations for clusters that were created\nless than 30 days ago.\n\nUnderstand cost estimation for idle clusters\n--------------------------------------------\n\nIf possible, GKE includes with the recommendation an estimated\nmonthly cost of the idle cluster, projecting how much money you'd save each\nmonth if you deleted the cluster. This estimate is derived from the cluster\ncosts over the past 30 days.\n\nAny estimated savings are projections based on previous spending, and are not a\nguarantee of future cost or savings.\n\nTo see these estimates, ensure that you have the required\n`billing.accounts.getSpendingInformation` permission to get spending\ninformation. For details, see [Cloud Billing\naccess](/billing/docs/how-to/billing-access#billing-access).\n\nTo get more information about the cost of all of your GKE\nclusters, including a more granular breakdown based on namespaces and workloads,\nsee [Get key spending insights for your GKE resource allocation\nand cluster costs](/kubernetes-engine/docs/how-to/cost-allocations).\n\nFor more information about the costs of running a GKE cluster,\nsee [GKE pricing](/kubernetes-engine/pricing).\n\nConsiderations when deleting idle clusters\n------------------------------------------\n\nBefore you delete a cluster that GKE determines is idle,\nconsider the following possibilities:\n\n- Does anyone use the cluster? For example, a cluster might be intentionally idle if its purpose is to maintain failover capacity.\n- Should the cluster be scaled down instead of deleted? For example, a cluster running a useful workload might have low utilization and be identified as idle because more resources were provisioned than necessary.\n\nImplement the recommendation to delete idle clusters\n----------------------------------------------------\n\nIf you've received an insight and recommendation that you have an idle cluster\nthat can be deleted and have ruled out the [considerations](#idle-cluster-considerations)\nfor keeping the cluster running, follow the instructions in the recommendation\nand delete the cluster.\n\nWhat's next\n-----------\n\n- [Optimize your usage of GKE with insights and recommendations](/kubernetes-engine/docs/how-to/optimize-with-recommenders).\n- [Best practices for running cost-optimized Kubernetes applications on GKE](/architecture/best-practices-for-running-cost-effective-kubernetes-applications-on-gke)."]]