Add OTLP LogExporter example

[cijothomas]

just a basic example to get up and running with OTLP Logs.

[alanwest]

nit: Latest version is 0.36.0

Another thought is if we don't want to keep updating this we could use :latest ... but usually explicit tag versions are ideal.

[cijothomas]

Want to do that when we pick new proto files, as I wasn't sure if they are all compatible with each other. (I hope they are, just did not have time to validate it, so another PR for that)

[codecov]

Codecov Report

Merging #2481 (9e31bb1) into main (ed814d1) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2481      +/-   ##
==========================================
- Coverage   79.84%   79.80%   -0.04%     
==========================================
  Files         254      254              
  Lines        8393     8393              
==========================================
- Hits         6701     6698       -3     
- Misses       1692     1695       +3     

Impacted Files	Coverage Δ
...nTelemetry/Internal/OpenTelemetrySdkEventSource.cs	71.02% <0.00%> (-3.74%)	⬇️
...Telemetry/Internal/SelfDiagnosticsEventListener.cs	97.63% <0.00%> (+0.78%)	⬆️

[p10tyr]

Hi
I am just trying to see if I can get logs into Elastic Stack. It seems that since ES version 8 it is supported with the unstable data model for now. (I am on ES 8.1)

I am looking at this example and it seems to use a local collector but I do not see where the URI is being configured? Is the default just localhost:4317 as per the docker instructions?

So for my logging configuration I am using. I don't think I need to explicitly specify GRPC (but that is the only protocol Elastics supports for now) neither the simple exporter?

Sadly I do not see anything show up in Elastic streams and by the looks of #2482 there should be some basic data coming through

Using OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs 1.0.0-rc9.2 (lowest to match)
To match stable OpenTelemetry 1.2.0

Unless I need to bump up to Otel 1.3.0 and logs-rc9.3?

 .AddLogging(configure => configure.AddOpenTelemetry(options =>
                {
                    options.IncludeScopes = true;

                    options.AddOtlpExporter(otlpExporter =>
                    {
                        otlpExporter.Protocol = OpenTelemetry.Exporter.OtlpExportProtocol.Grpc;
                        otlpExporter.ExportProcessorType = ExportProcessorType.Simple;
                        otlpExporter.Endpoint = new System.Uri("https://xyz.apm.aws.cloud.es.io");
                        otlpExporter.Headers = "Authorization=Bearer supersecret";
                    });
                }));

[cijothomas]

@ppumkin Please open a new issue for this. Thanks.

[p10tyr]

Thanks Cijo I followed the links to create a discussion.

Just in case anybody wants to follow...
#3249