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Opentelemetry Baggage Propagation (#3126)
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@rachelyangdog
rachelyangdog authored Feb 14, 2025
1 parent c345adb commit f5514e1
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Showing 9 changed files with 532 additions and 17 deletions.
23 changes: 21 additions & 2 deletions contrib/internal/httptrace/httptrace.go
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Original file line number Diff line number Diff line change
Expand Up @@ -10,14 +10,16 @@ package httptrace
import (
"context"
"fmt"
"gopkg.in/DataDog/dd-trace-go.v1/internal/log"
"gopkg.in/DataDog/dd-trace-go.v1/internal/telemetry"
"net/http"
"strconv"
"strings"
"sync"

"gopkg.in/DataDog/dd-trace-go.v1/internal/log"
"gopkg.in/DataDog/dd-trace-go.v1/internal/telemetry"

"gopkg.in/DataDog/dd-trace-go.v1/ddtrace"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/baggage"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer"
"gopkg.in/DataDog/dd-trace-go.v1/internal"
Expand Down Expand Up @@ -107,6 +109,23 @@ func StartRequestSpan(r *http.Request, opts ...ddtrace.StartSpanOption) (tracer.
tracer.WithSpanLinks(spanLinksCtx.SpanLinks())(ssCfg)
}
tracer.ChildOf(spanParentCtx)(ssCfg)

var baggageMap map[string]string
spanParentCtx.ForeachBaggageItem(func(k, v string) bool {
// Make the map only if we actually discover any baggage items.
if baggageMap == nil {
baggageMap = make(map[string]string)
}
baggageMap[k] = v
return true
})
if len(baggageMap) > 0 {
ctx := r.Context()
for k, v := range baggageMap {
ctx = baggage.Set(ctx, k, v)
}
r = r.WithContext(ctx)
}
}
}

Expand Down
18 changes: 18 additions & 0 deletions contrib/internal/httptrace/httptrace_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -368,3 +368,21 @@ func BenchmarkStartRequestSpan(b *testing.B) {
StartRequestSpan(r, opts...)
}
}

func TestStartRequestSpanWithBaggage(t *testing.T) {
t.Setenv("DD_TRACE_PROPAGATION_STYLE", "datadog,tracecontext,baggage")
tracer.Start()
defer tracer.Stop()

r := httptest.NewRequest(http.MethodGet, "/somePath", nil)
r.Header.Set("baggage", "key1=value1,key2=value2")
s, _, _ := StartRequestSpan(r)
s.Finish()
spanBm := make(map[string]string)
s.Context().ForeachBaggageItem(func(k, v string) bool {
spanBm[k] = v
return true
})
assert.Equal(t, "value1", spanBm["key1"])
assert.Equal(t, "value2", spanBm["key2"])
}
4 changes: 4 additions & 0 deletions contrib/net/http/roundtripper.go
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ import (
"gopkg.in/DataDog/dd-trace-go.v1/contrib/internal/httptrace"
"gopkg.in/DataDog/dd-trace-go.v1/contrib/net/http/internal/config"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/baggage"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer"
"gopkg.in/DataDog/dd-trace-go.v1/internal/appsec"
Expand Down Expand Up @@ -72,6 +73,9 @@ func (rt *roundTripper) RoundTrip(req *http.Request) (res *http.Response, err er
rt.cfg.before(req, span)
}
r2 := req.Clone(ctx)
for k, v := range baggage.All(ctx) {
span.SetBaggageItem(k, v)
}
if rt.cfg.propagation {
// inject the span context into the http request copy
err = tracer.Inject(span.Context(), tracer.HTTPHeadersCarrier(r2.Header))
Expand Down
33 changes: 33 additions & 0 deletions contrib/net/http/roundtripper_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
package http

import (
"context"
"encoding/base64"
"fmt"
"net/http"
Expand All @@ -22,6 +23,7 @@ import (
"gopkg.in/DataDog/dd-trace-go.v1/contrib/internal/httptrace"
"gopkg.in/DataDog/dd-trace-go.v1/contrib/internal/namingschematest"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/baggage"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/mocktracer"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer"
Expand Down Expand Up @@ -830,3 +832,34 @@ func TestAppsec(t *testing.T) {
})
}
}

func TestRoundTripperWithBaggage(t *testing.T) {
t.Setenv("DD_TRACE_PROPAGATION_STYLE", "datadog,tracecontext,baggage")
tracer.Start()
defer tracer.Stop()

var capturedHeaders http.Header

s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
capturedHeaders = r.Header.Clone()
w.WriteHeader(http.StatusOK)
_, _ = w.Write([]byte("Hello with Baggage!"))
}))
defer s.Close()

rt := WrapRoundTripper(http.DefaultTransport).(*roundTripper)

ctx := context.Background()
ctx = baggage.Set(ctx, "foo", "bar")
ctx = baggage.Set(ctx, "baz", "qux")

// Build the HTTP request with that context.
req, err := http.NewRequestWithContext(ctx, http.MethodGet, s.URL+"/baggage", nil)
assert.NoError(t, err)

resp, err := rt.RoundTrip(req)
assert.NoError(t, err)
defer resp.Body.Close()

assert.NotEmpty(t, capturedHeaders.Get("baggage"), "should have baggage header")
}
10 changes: 5 additions & 5 deletions ddtrace/opentelemetry/telemetry_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -23,21 +23,21 @@ func TestTelemetry(t *testing.T) {
}{
{
// if nothing is set, DD_TRACE_PROPAGATION_STYLE will be set to datadog,tracecontext
expectedInject: "datadog,tracecontext",
expectedExtract: "datadog,tracecontext",
expectedInject: "datadog,tracecontext,baggage",
expectedExtract: "datadog,tracecontext,baggage",
},
{
env: map[string]string{
"DD_TRACE_PROPAGATION_STYLE_EXTRACT": "datadog",
},
expectedInject: "datadog,tracecontext",
expectedInject: "datadog,tracecontext,baggage",
expectedExtract: "datadog",
},
{
env: map[string]string{
"DD_TRACE_PROPAGATION_STYLE_EXTRACT": "none",
},
expectedInject: "datadog,tracecontext",
expectedInject: "datadog,tracecontext,baggage",
expectedExtract: "",
},
{
Expand All @@ -55,7 +55,7 @@ func TestTelemetry(t *testing.T) {
"DD_TRACE_PROPAGATION_STYLE_EXTRACT": "",
},
expectedInject: "tracecontext",
expectedExtract: "datadog,tracecontext",
expectedExtract: "datadog,tracecontext,baggage",
},
{
env: map[string]string{
Expand Down
12 changes: 6 additions & 6 deletions ddtrace/tracer/log_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,7 @@ func TestStartupLog(t *testing.T) {
tp.Ignore("appsec: ", telemetry.LogPrefix)
logStartup(tracer)
require.Len(t, tp.Logs(), 2)
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"","service":"tracer\.test(\.exe)?","agent_url":"http://localhost:9/v0.4/traces","agent_error":"Post .*","debug":false,"analytics_enabled":false,"sample_rate":"NaN","sample_rate_limit":"disabled","trace_sampling_rules":null,"span_sampling_rules":null,"sampling_rules_error":"","service_mappings":null,"tags":{"runtime-id":"[^"]*"},"runtime_metrics_enabled":false,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"","architecture":"[^"]*","global_service":"","lambda_mode":"false","appsec":((true)|(false)),"agent_features":{"DropP0s":((true)|(false)),"Stats":((true)|(false)),"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":false},"feature_flags":\[\],"propagation_style_inject":"datadog,tracecontext","propagation_style_extract":"datadog,tracecontext","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[1])
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"","service":"tracer\.test(\.exe)?","agent_url":"http://localhost:9/v0.4/traces","agent_error":"Post .*","debug":false,"analytics_enabled":false,"sample_rate":"NaN","sample_rate_limit":"disabled","trace_sampling_rules":null,"span_sampling_rules":null,"sampling_rules_error":"","service_mappings":null,"tags":{"runtime-id":"[^"]*"},"runtime_metrics_enabled":false,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"","architecture":"[^"]*","global_service":"","lambda_mode":"false","appsec":((true)|(false)),"agent_features":{"DropP0s":((true)|(false)),"Stats":((true)|(false)),"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":false},"feature_flags":\[\],"propagation_style_inject":"datadog,tracecontext,baggage","propagation_style_extract":"datadog,tracecontext,baggage","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[1])
})

t.Run("configured", func(t *testing.T) {
Expand Down Expand Up @@ -65,7 +65,7 @@ func TestStartupLog(t *testing.T) {
tp.Ignore("appsec: ", telemetry.LogPrefix)
logStartup(tracer)
require.Len(t, tp.Logs(), 2)
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"configuredEnv","service":"configured.service","agent_url":"http://localhost:9/v0.4/traces","agent_error":"Post .*","debug":true,"analytics_enabled":true,"sample_rate":"0\.123000","sample_rate_limit":"100","trace_sampling_rules":\[{"service":"mysql","sample_rate":0\.75}\],"span_sampling_rules":null,"sampling_rules_error":"","service_mappings":{"initial_service":"new_service"},"tags":{"runtime-id":"[^"]*","tag":"value","tag2":"NaN"},"runtime_metrics_enabled":true,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"2.3.4","architecture":"[^"]*","global_service":"configured.service","lambda_mode":"false","appsec":((true)|(false)),"agent_features":{"DropP0s":false,"Stats":false,"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":true,"metadata":{"version":"v1"}},"feature_flags":\["discovery"\],"propagation_style_inject":"datadog,tracecontext","propagation_style_extract":"datadog,tracecontext","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[1])
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"configuredEnv","service":"configured.service","agent_url":"http://localhost:9/v0.4/traces","agent_error":"Post .*","debug":true,"analytics_enabled":true,"sample_rate":"0\.123000","sample_rate_limit":"100","trace_sampling_rules":\[{"service":"mysql","sample_rate":0\.75}\],"span_sampling_rules":null,"sampling_rules_error":"","service_mappings":{"initial_service":"new_service"},"tags":{"runtime-id":"[^"]*","tag":"value","tag2":"NaN"},"runtime_metrics_enabled":true,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"2.3.4","architecture":"[^"]*","global_service":"configured.service","lambda_mode":"false","appsec":((true)|(false)),"agent_features":{"DropP0s":false,"Stats":false,"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":true,"metadata":{"version":"v1"}},"feature_flags":\["discovery"\],"propagation_style_inject":"datadog,tracecontext,baggage","propagation_style_extract":"datadog,tracecontext,baggage","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[1])
})

t.Run("limit", func(t *testing.T) {
Expand Down Expand Up @@ -95,7 +95,7 @@ func TestStartupLog(t *testing.T) {
tp.Ignore("appsec: ", telemetry.LogPrefix)
logStartup(tracer)
require.Len(t, tp.Logs(), 2)
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"configuredEnv","service":"configured.service","agent_url":"http://localhost:9/v0.4/traces","agent_error":"Post .*","debug":true,"analytics_enabled":true,"sample_rate":"0\.123000","sample_rate_limit":"1000.001","trace_sampling_rules":\[{"service":"mysql","sample_rate":0\.75}\],"span_sampling_rules":null,"sampling_rules_error":"","service_mappings":{"initial_service":"new_service"},"tags":{"runtime-id":"[^"]*","tag":"value","tag2":"NaN"},"runtime_metrics_enabled":true,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"2.3.4","architecture":"[^"]*","global_service":"configured.service","lambda_mode":"false","appsec":((true)|(false)),"agent_features":{"DropP0s":false,"Stats":false,"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":false},"feature_flags":\[\],"propagation_style_inject":"datadog,tracecontext","propagation_style_extract":"datadog,tracecontext","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[1])
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"configuredEnv","service":"configured.service","agent_url":"http://localhost:9/v0.4/traces","agent_error":"Post .*","debug":true,"analytics_enabled":true,"sample_rate":"0\.123000","sample_rate_limit":"1000.001","trace_sampling_rules":\[{"service":"mysql","sample_rate":0\.75}\],"span_sampling_rules":null,"sampling_rules_error":"","service_mappings":{"initial_service":"new_service"},"tags":{"runtime-id":"[^"]*","tag":"value","tag2":"NaN"},"runtime_metrics_enabled":true,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"2.3.4","architecture":"[^"]*","global_service":"configured.service","lambda_mode":"false","appsec":((true)|(false)),"agent_features":{"DropP0s":false,"Stats":false,"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":false},"feature_flags":\[\],"propagation_style_inject":"datadog,tracecontext,baggage","propagation_style_extract":"datadog,tracecontext,baggage","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[1])
})

t.Run("errors", func(t *testing.T) {
Expand All @@ -110,7 +110,7 @@ func TestStartupLog(t *testing.T) {
logStartup(tracer)
require.Len(t, tp.Logs(), 2)
fmt.Println(tp.Logs()[1])
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"","service":"tracer\.test(\.exe)?","agent_url":"http://localhost:9/v0.4/traces","agent_error":"Post .*","debug":false,"analytics_enabled":false,"sample_rate":"NaN","sample_rate_limit":"100","trace_sampling_rules":\[{"service":"some\.service","sample_rate":0\.234}\],"span_sampling_rules":null,"sampling_rules_error":"\\n\\tat index 1: ignoring rule {Service:other.service Rate:2}: rate is out of \[0\.0, 1\.0] range","service_mappings":null,"tags":{"runtime-id":"[^"]*"},"runtime_metrics_enabled":false,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"","architecture":"[^"]*","global_service":"","lambda_mode":"false","appsec":((true)|(false)),"agent_features":{"DropP0s":((true)|(false)),"Stats":((true)|(false)),"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":false},"feature_flags":\[\],"propagation_style_inject":"datadog,tracecontext","propagation_style_extract":"datadog,tracecontext","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[1])
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"","service":"tracer\.test(\.exe)?","agent_url":"http://localhost:9/v0.4/traces","agent_error":"Post .*","debug":false,"analytics_enabled":false,"sample_rate":"NaN","sample_rate_limit":"100","trace_sampling_rules":\[{"service":"some\.service","sample_rate":0\.234}\],"span_sampling_rules":null,"sampling_rules_error":"\\n\\tat index 1: ignoring rule {Service:other.service Rate:2}: rate is out of \[0\.0, 1\.0] range","service_mappings":null,"tags":{"runtime-id":"[^"]*"},"runtime_metrics_enabled":false,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"","architecture":"[^"]*","global_service":"","lambda_mode":"false","appsec":((true)|(false)),"agent_features":{"DropP0s":((true)|(false)),"Stats":((true)|(false)),"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":false},"feature_flags":\[\],"propagation_style_inject":"datadog,tracecontext,baggage","propagation_style_extract":"datadog,tracecontext,baggage","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[1])
})

t.Run("lambda", func(t *testing.T) {
Expand All @@ -123,7 +123,7 @@ func TestStartupLog(t *testing.T) {
tp.Ignore("appsec: ", telemetry.LogPrefix)
logStartup(tracer)
assert.Len(tp.Logs(), 1)
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"","service":"tracer\.test(\.exe)?","agent_url":"http://localhost:9/v0.4/traces","agent_error":"","debug":false,"analytics_enabled":false,"sample_rate":"NaN","sample_rate_limit":"disabled","trace_sampling_rules":null,"span_sampling_rules":null,"sampling_rules_error":"","service_mappings":null,"tags":{"runtime-id":"[^"]*"},"runtime_metrics_enabled":false,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"","architecture":"[^"]*","global_service":"","lambda_mode":"true","appsec":((true)|(false)),"agent_features":{"DropP0s":false,"Stats":false,"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":false},"feature_flags":\[\],"propagation_style_inject":"datadog,tracecontext","propagation_style_extract":"datadog,tracecontext","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[0])
assert.Regexp(logPrefixRegexp+` INFO: DATADOG TRACER CONFIGURATION {"date":"[^"]*","os_name":"[^"]*","os_version":"[^"]*","version":"[^"]*","lang":"Go","lang_version":"[^"]*","env":"","service":"tracer\.test(\.exe)?","agent_url":"http://localhost:9/v0.4/traces","agent_error":"","debug":false,"analytics_enabled":false,"sample_rate":"NaN","sample_rate_limit":"disabled","trace_sampling_rules":null,"span_sampling_rules":null,"sampling_rules_error":"","service_mappings":null,"tags":{"runtime-id":"[^"]*"},"runtime_metrics_enabled":false,"runtime_metrics_v2_enabled":false,"profiler_code_hotspots_enabled":((false)|(true)),"profiler_endpoints_enabled":((false)|(true)),"dd_version":"","architecture":"[^"]*","global_service":"","lambda_mode":"true","appsec":((true)|(false)),"agent_features":{"DropP0s":false,"Stats":false,"StatsdPort":(0|8125)},"integrations":{.*},"partial_flush_enabled":false,"partial_flush_min_spans":1000,"orchestrion":{"enabled":false},"feature_flags":\[\],"propagation_style_inject":"datadog,tracecontext,baggage","propagation_style_extract":"datadog,tracecontext,baggage","tracing_as_transport":false,"dogstatsd_address":"localhost:8125"}`, tp.Logs()[0])
})

t.Run("integrations", func(t *testing.T) {
Expand Down Expand Up @@ -195,7 +195,7 @@ func TestLogFormat(t *testing.T) {
func TestLogPropagators(t *testing.T) {
t.Run("default", func(t *testing.T) {
assert := assert.New(t)
substring := `"propagation_style_inject":"datadog,tracecontext","propagation_style_extract":"datadog,tracecontext"`
substring := `"propagation_style_inject":"datadog,tracecontext,baggage","propagation_style_extract":"datadog,tracecontext,baggage"`
log := setup(t, nil)
assert.Regexp(substring, log)
})
Expand Down
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