The following table provides a summary of Container-Optimized OS releases available on
Compute Engine:
Active Milestones
| OS version |
Image project |
Image family |
Built by |
Deprecation date |
Release notes |
| COS 85 LTS |
cos-cloud |
cos-85-lts |
Google |
December 2021 |
milestone 85 |
| COS 81 LTS |
cos-cloud |
cos-81-lts |
Google |
June 2021 |
milestone 81 |
| COS 77 LTS |
cos-cloud |
cos-77-lts |
Google |
December 2020 |
milestone 77 |
Past Milestones
| OS version |
Image project |
Image family |
Built by |
Deprecation date |
Release Notes |
| COS 73 LTS |
cos-cloud |
cos-73-lts |
Google |
June 2020 |
milestone 73 |
| COS 69 LTS |
cos-cloud |
cos-69-lts |
Google |
December 2019 |
milestone 69 |