Google Container-Optimized OS (COS) cos-73 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Google Container-Optimized OS (COS) cos-73 reached end of life on 5 Sept 2020. It no longer receives security fixes.
Support timeline
Official dates from the Google Container-Optimized OS (COS) release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 25 Mar 2019 | — |
| End of life | 5 Sept 2020 | 5.9 years ago |
| Latest release | cos-73-11647-656-0 · 5 Sept 2020 | final |
Where to go from cos-73
Recommended target: Google Container-Optimized OS (COS) cos-129 (supported until 1 Mar 2028).
The newest actively supported branch is Google Container-Optimized OS (COS) cos-129 (latest release cos-129-19506-299-82).
Frequently asked questions
Is Google Container-Optimized OS (COS) cos-73 still safe to use?
Google Container-Optimized OS (COS) cos-73 reached end of life on 5 Sept 2020, 2,164 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Google Container-Optimized OS (COS) cos-73?
Yes — the final release (cos-73-11647-656-0) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Google Container-Optimized OS (COS) cos-73 to?
Upgrade to Google Container-Optimized OS (COS) cos-129, the newest actively supported branch (supported until 1 Mar 2028).