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Google Container-Optimized OS (COS)
Active
Operating Systems Latest Version: cos-129-19506-224-16 Latest Release: Jun 8, 2026
Container-Optimized OS (COS) is a Google-managed OS image optimized for running Docker containers on Google Cloud.
Versions
16
Latest Version
cos-129-19506-224-16
Active Support
4
EOL
12
Lifecycle Timeline
Today ↓
cos-129
cos-129
cos-125
cos-125
cos-121
cos-121
cos-117
cos-117
cos-113
cos-113
cos-109
cos-109
cos-105
cos-105
cos-101
cos-101
cos-97
cos-97
cos-93
cos-93
Active SupportSecurity SupportEOL
Versions
| Release | Release Date | Active Support | EOL | Latest Version | LTS | Status |
|---|---|---|---|---|---|---|
| cos-129 | May 21, 2026 | Yes | Mar 1, 2028 | cos-129-19506-224-16 | Yes | Active |
| cos-125 | Oct 9, 2025 | Yes | Sep 1, 2027 | cos-125-19216-395-73 | Yes | Active |
| cos-121 | Apr 14, 2025 | Yes | Mar 1, 2027 | cos-121-18867-381-162 | Yes | Active |
| cos-117 | Oct 2, 2024 | Yes | Sep 1, 2026 | cos-117-18613-613-40 | Yes | Active |
| cos-113 | Apr 15, 2024 | No | May 12, 2026 | cos-113-18244-582-104 | Yes | EOL |
| cos-109 | Sep 27, 2023 | No | Sep 24, 2025 | cos-109-17800-570-50 | Yes | EOL |
| cos-105 | Apr 3, 2023 | No | Apr 1, 2025 | cos-105-17412-535-98 | Yes | EOL |
| cos-101 | Sep 15, 2022 | No | Oct 21, 2024 | cos-101-17162-528-64 | Yes | EOL |
| cos-97 | Mar 29, 2022 | No | Mar 27, 2024 | cos-97-16919-450-41 | Yes | EOL |
| cos-93 | Oct 18, 2021 | No | Oct 24, 2023 | cos-93-16623-461-42 | Yes | EOL |
| cos-89 | Apr 7, 2021 | No | Mar 1, 2023 | cos-89-16108-798-22 | Yes | EOL |
| cos-85 | Sep 24, 2020 | No | Sep 1, 2022 | cos-85-13310-1498-13 | Yes | EOL |
| cos-81 | Mar 27, 2020 | No | Jan 10, 2022 | cos-81-12871-1317-8 | Yes | EOL |
| cos-77 | Sep 27, 2019 | No | Apr 1, 2021 | cos-77-12371-1109-0 | Yes | EOL |
| cos-73 | Mar 25, 2019 | No | Sep 5, 2020 | cos-73-11647-656-0 | Yes | EOL |
| cos-69 | Sep 18, 2018 | No | Dec 1, 2019 | cos-69-10895-385-0 | Yes | EOL |
Frequently Asked Questions
Which versions of Google Container-Optimized OS (COS) have reached end of life?
The following Google Container-Optimized OS (COS) versions have reached end of life and no longer receive security updates: cos-113, cos-109, cos-105, cos-101, cos-97, cos-93, cos-89, cos-85 (and 4 more). It is recommended to upgrade to a supported version.
Is it safe to continue using Google Container-Optimized OS (COS) cos-113?
Google Container-Optimized OS (COS) cos-113 has reached end of life and no longer receives security patches or bug fixes. Continuing to use it may expose your systems to known vulnerabilities. We strongly recommend upgrading to a supported version.
What is the latest version of Google Container-Optimized OS (COS)?
The latest version of Google Container-Optimized OS (COS) is cos-129-19506-224-16, released in the cos-129 release cycle.
How many versions of Google Container-Optimized OS (COS) are currently supported?
Google Container-Optimized OS (COS) currently has 4 actively supported version(s): cos-129, cos-125, cos-121, cos-117.
When does Google Container-Optimized OS (COS) cos-129 reach end of life?
Google Container-Optimized OS (COS) cos-129 is scheduled to reach end of life on Mar 1, 2028.
What should I do when Google Container-Optimized OS (COS) reaches end of life?
When a Google Container-Optimized OS (COS) version reaches end of life, you should: 1) Plan your migration to a supported version as soon as possible. 2) Review the release notes for breaking changes. 3) Test your applications thoroughly in a staging environment. 4) Update your dependencies to ensure compatibility with the new version.