PruneOlderImagesInHour
Age threshold (in hours) for pruning Docker images on Rack instances. Images that exceed this age threshold are removed during the next scheduled cleanup run, helping to reclaim disk space.
| Default value | 96 |
| Minimum value | 1 |
Use Cases
- Reducing from the default 96 hours (4 days) on Racks with limited disk space or very frequent deployments
- Increasing the value on Racks where you need to retain older images for rollback purposes
- Setting to a low value (e.g.,
24) on development Racks where old images are rarely needed
Additional Information
This parameter works together with PruneOlderImagesCronRunFreq to control Docker image cleanup. PruneOlderImagesInHour sets the age threshold (in hours) for which images are eligible for pruning, while PruneOlderImagesCronRunFreq determines how often the cleanup job runs.
The default of 96 hours (4 days) provides a reasonable balance between disk space conservation and the ability to quickly roll back to a recent deployment.
$ convox rack params set PruneOlderImagesInHour=48
See Also
