Gitlab Omnibus: Delete backup from Amazon S3

You can use S3 lifecycle policy by Following steps:

1. Click on your S3 property and select Lifecycle tab and click Add rule.

   

2. Click on Configure Rule.

   

3. Check permanently delete and enter seven days(or any other number you want) and click on review.

   

4. Enter rule name and click on "create and activate rule".

   

5. Check your rule created successfully and enjoy.