Implement Fluentd Forward Protocol v1 receiver in Collector.

[tigrannajaryan]

Here is protocol spec: Fluentd Forward Protocol v1.

It needs to receive to Log data type.

[PettitWesley]

Just found this, a Golang library that claims to support Forward v1 input/server: https://godoc.org/github.com/fluent/fluentd-forwarder

That should make the implementation very straightforward :)

[PettitWesley]

I'd like to work on this; though I won't put a "claim" on it since I don't think you can (or should) do that in OSS projects.

A pre-requisite for this is implementing support for the log data model in the collector, right?

[tigrannajaryan]

@PettitWesley Great. Yes, we need to add log data type to the Collector first. I will do it next so that you can move forward.

I am going to assign this to you tentatively, it will make it easier to track the overall PoC work.

[tigrannajaryan]

@PettitWesley FYI, the PR that adds experiment Logs data type is up: #1045

You will need to use this data type in Forward protocol receiver.

[tigrannajaryan]

Done via #1173