[exporter/datadog] Missing custom resource attributes in datadog

[dariogriffo]

Component(s)

exporter/datadog

What happened?

Description

When exporting metrics from a .net API to datadog via the collector, custom resource attributes, are not visible in datadog

Steps to Reproduce

Use the following code to export

using System.Diagnostics.Metrics;
using OpenTelemetry.Metrics;
using OpenTelemetry.Resources;

var builder = WebApplication.CreateBuilder(args);
Meter m = new Meter("Meter");
var c = m.CreateCounter<int>("counter");
builder.Services.AddOpenTelemetry()
    .ConfigureResource(builder => builder
        .AddService(serviceName: "OTel.NET Getting Started")
        .AddAttributes(new Dictionary<string, object>
        {
            ["environment.name"] = "production",
            ["team.name"] = "backend"
        }))
    .WithMetrics(builder => builder
        .AddMeter(m.Name)
        .ConfigureResource(b=>b.AddAttributes(new Dictionary<string, object>
        {
            ["environment.name"] = "production",
            ["team.name"] = "backend"
        }))
        .AddConsoleExporter((exporterOptions, metricReaderOptions) =>
        {
            metricReaderOptions.PeriodicExportingMetricReaderOptions.ExportIntervalMilliseconds = 1000;
        }).AddOtlpExporter()
    );
var app = builder.Build();

app.MapGet("/", () =>
{
    c.Add(1);
    return "Hello World!";
});

app.Run();

Resource of the attributes are present in the collector (attached image with environment and team.name attributes

Expected Result

The 2 custom attributes set at resource level appear in datadog

Actual Result

The custom attributes won't appear in datadog. The metrics with service and version attributes appear

Collector version

0.114.0

Environment information

Environment

OS: (e.g., "Docker via debian bookworm")

OpenTelemetry Collector configuration

receivers:
  otlp:
    protocols:
      grpc:
      http:
processors:
  batch:
exporters:
  debug:
    verbosity: detailed
  otlphttp:
    endpoint: "http://seq:5341/ingest/otlp"
    tls:
      insecure: true
  otlp/aspire:
    endpoint: aspire:18889
    tls:
      insecure: true    
  datadog:
    api:
      site: MY_SITE
      key: MY_KEY
service:
  pipelines:
    logs:
      receivers: [ otlp ]
      exporters: [ otlphttp, otlp/aspire ]
      processors: [batch]      
    metrics:
        receivers: [ otlp ]
        exporters: [ datadog, otlp/aspire ]
  telemetry:
    logs:
      level: "debug"

Log output

Image attached

Additional context

No response

[github-actions[bot]]

Pinging code owners:

• exporter/datadog: @mx-psi @dineshg13 @liustanley @songy23 @mackjmr @ankitpatel96

  See Adding Labels via Comments if you do not have permissions to add labels yourself.

[mackjmr]

Hey @dariogriffo, did you set resource_attributes_as_tags (https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/exporter/datadogexporter/examples/collector.yaml#L260-L267) to true ?

[dariogriffo]

Resolved with the comment by @mackjmr