S3 object key by Fluent Tag

[so0k]

I modified code a bit to store objects by Fluent TAG (using fluentbit 1.0.4)

See README for fluentbit config:
https://github.com/so0k/go-s3-logsink#fluent-bit-config

changes in http-server:

• Read FLUENT-TAG HTTP header from request:

https://github.com/so0k/go-s3-logsink/blob/073d7e1043da72da2ad1c7d81411418d57dca186/server/http_server.go#L47

• Update function signatures to pass tag for Objectkey

https://github.com/so0k/go-s3-logsink/blob/073d7e1043da72da2ad1c7d81411418d57dca186/server/http_server.go#L86

• I dropped UUID from object key and used tag instead

https://github.com/so0k/go-s3-logsink/blob/073d7e1043da72da2ad1c7d81411418d57dca186/server/http_server.go#L97

If you like, I do PR with the changes to your repo, unless you don't think this would be useful for you

Also, is there a concern with dropping the UUID, for the same container I do not believe flb ships logs more than once the same milli second and this should be safe, no?

[StevenACoffman]

This is great! Please make a PR! I've been meaning to revisit this and update things for the newer version of fluent-bit. I added you as a collaborator to make that easier. I'm not sure about the implications of dropping the UUID, but that might be fine. One of my primary goals was to facilitate easily taking the S3 files, sending them back into fluent-bit and have them be delivered properly.

This allows disaster recovery for log pipelines that ship logs to kafka and elasticsearch.

[so0k]

I'll upstream as soon as I have a chance, sorry it's taking a while