Expose MinIO Go retry configuration for S3

[koren-eli]

Hi,

MinIO Go has a built-in retry mechanism with the following default behavior:

• Max retry: 10
• Default retry unit: 200ms
• Default retry cap: 1s

This results in the following backoff ranges:

1. Attempt 1: random in [0, 200ms]
2. Attempt 2: random in [0, 400ms]
3. Attempt 3: random in [0, 800ms]
4. Attempt 4–9: random in [0, 1s]

The MinIO Go SDK exposes these as package-level variables that can be customized:

• minio.DefaultRetryUnit
• minio.DefaultRetryCap
• minio.MaxRetry

See:
https://pkg.go.dev/github.com/minio/minio-go/v7#pkg-variables

I looked through Tempo’s S3 config (specifically tempodb/backend/s3/config.go) and couldn’t find a way to configure these retry settings.

Is there a reason these are not exposed today? Would it be acceptable to add options to control the retry behavior?

This would be useful for environments where the default retry behavior is too aggressive.

Thanks.

[joe-elliott]

Is there a reason these are not exposed today? Would it be acceptable to add options to control the retry behavior?

No reason. We would gladly take a PR to change these values if you'd like to contribute it 🙏