chore(dockerutil): propagate OTEL context to Docker daemon

This allows to correlate operations triggered by a build (e.g.
a client-side pull) with the build that generated them.

Signed-off-by: Alberto Garcia Hierro <[email protected]>

Author: fiam

go.mod

@@ -50,6 +50,7 @@ require (
 	github.com/tonistiigi/go-csvvalue v0.0.0-20240710180619-ddb21b71c0b4
 	github.com/tonistiigi/jaeger-ui-rest v0.0.0-20250408171107-3dd17559e117
 	github.com/zclconf/go-cty v1.16.2
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.56.0
 	go.opentelemetry.io/otel v1.31.0
 	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.31.0
 	go.opentelemetry.io/otel/metric v1.31.0
@@ -152,7 +153,6 @@ require (
 	github.com/xhit/go-str2duration/v2 v2.1.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.56.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace v0.56.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.56.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.31.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.31.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.31.0 // indirect

util/dockerutil/api.go

@@ -4,6 +4,8 @@ import (
 	"github.com/docker/cli/cli/command"
 	"github.com/docker/cli/cli/context/docker"
 	dockerclient "github.com/docker/docker/client"
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+	"go.opentelemetry.io/otel/propagation"
 )
 
 // ClientAPI represents an active docker API object.
@@ -36,6 +38,10 @@ func NewClientAPI(cli command.Cli, ep string) (*ClientAPI, error) {
 		return nil, err
 	}
 
+	clientOpts = append(clientOpts, dockerclient.WithTraceOptions(otelhttp.WithPropagators(
+		propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}),
+	)))
+
 	ca.APIClient, err = dockerclient.NewClientWithOpts(clientOpts...)
 	if err != nil {
 		return nil, err