1. Proposed title of this feature request

postStart and preStop hooks in HAProxy
2. What is the nature and description of the request?

Customers may need to add some custom script before the HAProxy pod is terminated, like granting some grace period where no more connections are accepted and the current ones are gracefully closed.
3. Why does the customer need this? (List the business requirements here)

Non-graceful connection closures  have an impact at application level
4. List any affected packages or components.

HAProoxy