gRPC Hook Extension Load Balancing

[paraskun]

What would you like to be added or enhanced?

Ability to specify multiple addresses for a HookProvider with internal client-side load balancing between them.
Addresses can also be discovered using DNS A records and a fixed port number (Docker does not support SRV records yet, so).

As a consequence, it can be assumed that OnProviderLoaded can only be called once.

Why is this needed?

In case of high traffic hooks (message routing) with low latency requirement it is more efficient to have an integrated client-side LB.

[paraskun]

Just discovered: #10586

[savonarola]

Hello!
Thanks for the suggestion. I initiated discussion of the feature with the team.

[paraskun]

Thank you for your work. It is very useful!