Container-Optimized OS は、 Google Cloud上でさまざまなコンテナ ワークロードを実行できることがテストされ、認定されています。この OS にはセキュリティ アップデート（CVE）とバグ修正によって積極的にパッチが適用され、 Google Cloud ユーザーに影響のある問題に対処しています。これらの修正プログラムには、cos-cloud プロジェクトのイメージ リリースからアクセスできます。
Container-Optimized OS イメージのサポートは、cos-cloud プロジェクトの長期サポート（LTS）イメージ ファミリーで利用できます。利用可能なイメージ ファミリーの詳細については、バージョン管理スキームをご覧ください。次のサポート契約は、LTS イメージ ファミリーにのみ適用されます。
非推奨のイメージには、images get API を使用した名前で直接アクセスした場合に、引き続きアクセスおよび使用することができます。ただし、それらのイメージの問題は修正されていない可能性があるか、より新しいマイルストーンでのみ修正されます。非推奨イメージに対して報告される問題は、より新しいイメージ マイルストーンでのみ修正される場合があります。引き続きバグ修正やセキュリティ パッチにアクセスするには、より新しいアクティブなマイルストーンの 1 つにアップグレードしてください。
[[["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 2025-09-04 UTC。"],[[["\u003cp\u003eContainer-Optimized OS (COS) is designed and tested for container workloads on Google Cloud, receiving regular security and bug-fix updates through image releases.\u003c/p\u003e\n"],["\u003cp\u003eCOS offers Long Term Supported (LTS) image families in the \u003ccode\u003ecos-cloud\u003c/code\u003e project, with each LTS milestone supported for 2 years.\u003c/p\u003e\n"],["\u003cp\u003eDuring the support window, LTS milestones receive active patching for bugs, regular security vulnerability scans and fixes, and on-demand or quarterly releases with fixes, while refraining from introducing new breaking features.\u003c/p\u003e\n"],["\u003cp\u003eDeprecated LTS image families are marked with a \u003ccode\u003eDEPRECATED\u003c/code\u003e flag, preventing them from appearing in the active image list, and using the Image Family API with deprecated images will return errors.\u003c/p\u003e\n"],["\u003cp\u003eDeprecated images are still accessible through the \u003ccode\u003eimages get\u003c/code\u003e API, however issues may only be fixed in newer milestones, and users are advised to upgrade to active milestones to ensure continued bug fixes and security patches.\u003c/p\u003e\n"]]],[],null,["# Support policy\n\nContainer-Optimized OS is tested and qualified for running various container\nworkloads on Google Cloud. It is actively patched with security updates (CVEs)\nand bug-fixes to address issues that impact Google Cloud users. Users get access\nto these fixes via our image releases in the `cos-cloud` project.\n\nContainer-Optimized OS image support is available for our Long Term Supported (LTS)\nfamily of images in the `cos-cloud` project. For a description of available\nimage families, see [Versioning scheme](/container-optimized-os/docs/concepts/versioning#image_families).\nThe following support commitment applies only to our LTS family of images.\n\nSupport duration\n----------------\n\nApproximately twice each year, the\nContainer-Optimized OS team releases a Long Term Supported (LTS) milestone on\nits `cos-[MILESTONE]-lts` and `cos-arm64-[MILESTONE]-lts` image families. Once\na milestone is introduced on the LTS families, it is supported for **2 years**.\n\nDuring this support window:\n\n- The milestone is actively patched for any critical bugs.\n- The milestone is actively scanned for security vulnerabilities, and security fixes are applied on regular basis.\n- New releases containing high priority bug and security fixes are released on-demand.\n- New releases containing medium and low priority bug and security fixes are released every 3 months.\n- To maintain stability, no new breaking features are introduced.\n- All changes in the image are documented on a dedicated [release notes](/container-optimized-os/docs/release-notes#lts_image_families) page.\n\nDeprecation\n-----------\n\nAt the end of a milestone's support window, the corresponding `cos-[MILESTONE]-lts`\nand `cos-arm64-[MILESTONE]-lts` families are deprecated. Specifically, we set the\n[DEPRECATED flag](/compute/docs/reference/latest/images/deprecate) on images in\nthat milestone and those images stop appearing in the active list of images in\nthe `cos-cloud` project.\n| **Warning:** Any [Image Family API](/compute/docs/reference/rest/v1/images/getFromFamily) references to the deprecated image family will return errors and break any workflows depending on it. You should not use this API to create production instances.\n\nDeprecated images are still accessible and usable when accessed directly by name\nusing the [`images get` API](/compute/docs/reference/rest/v1/images/get).\nHowever, any issues with those images might not be fixed or will only be fixed\nin newer milestones. Issues reported against deprecated images may be fixed only\nin newer image milestones. To continue having access to bug fixes and security\npatches, upgrade to one of the newer active milestones.\n\nContact us\n----------\n\n- For technical support: Contact [Google Cloud support](/support)\n- For general questions:\n - StackOverflow: [google-container-os](http://stackoverflow.com/questions/tagged/google-container-os) tag\n - Mailing list for Compute Engine users: [gce-discussion](https://groups.google.com/forum/#!forum/gce-discussion)\n - Mailing list for Kubernetes Users: [kubernetes-users](https://groups.google.com/forum/#!forum/kubernetes-users)\n - Visit the Google Cloud [Slack community](https://googlecloud-community.slack.com/); [use this form to sign up](https://join.slack.com/t/googlecloud-community/shared_invite/zt-2mz6i6j8l-qMC13DEg6FAtGMH4wVytTA)."]]
