Log provider namespace during startup

pkg/provider/aggregator/aggregator.go

@@ -2,6 +2,7 @@ package aggregator
 
 import (
 	"context"
+	"fmt"
 	"time"
 
 	"github.com/rs/zerolog/log"
@@ -203,8 +204,16 @@ func (p *ProviderAggregator) launchProvider(configurationChan chan<- dynamic.Mes
 		log.Debug().Err(err).Msgf("Cannot marshal the provider configuration %T", prd)
 	}
 
-	log.Info().Msgf("Starting provider %T", prd)
+	// Check if provider has namespace information.
-	log.Debug().RawJSON("config", []byte(jsonConf)).Msgf("%T provider configuration", prd)
+	var namespaceInfo string
+	if namespaceProvider, ok := prd.(provider.NamespacedProvider); ok {
+		if namespace := namespaceProvider.Namespace(); namespace != "" {
+			namespaceInfo = fmt.Sprintf(" (namespace: %s)", namespace)
+		}
+	}
+
+	log.Info().Msgf("Starting provider %T%s", prd, namespaceInfo)
+	log.Debug().RawJSON("config", []byte(jsonConf)).Msgf("%T provider configuration%s", prd, namespaceInfo)
 
 	if err := maybeThrottledProvide(prd, p.providersThrottleDuration)(configurationChan, pool); err != nil {
 		log.Error().Err(err).Msgf("Cannot start the provider %T", prd)

pkg/provider/aggregator/aggregator_test.go

@@ -1,9 +1,13 @@
 package aggregator
 
 import (
+	"bytes"
 	"testing"
 	"time"
 
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"github.com/traefik/traefik/v3/pkg/config/dynamic"
 	"github.com/traefik/traefik/v3/pkg/provider"
@@ -40,6 +44,34 @@ func TestProviderAggregator_Provide(t *testing.T) {
 	require.NoError(t, <-errCh)
 }
 
+func TestLaunchNamespacedProvider(t *testing.T) {
+	// Capture log output
+	var buf bytes.Buffer
+
+	originalLogger := log.Logger
+	log.Logger = zerolog.New(&buf).Level(zerolog.InfoLevel)
+
+	providerWithNamespace := &mockNamespacedProvider{namespace: "test-namespace"}
+
+	aggregator := ProviderAggregator{
+		internalProvider: providerWithNamespace,
+	}
+
+	cfgCh := make(chan dynamic.Message)
+	pool := safe.NewPool(t.Context())
+
+	t.Cleanup(func() {
+		pool.Stop()
+		log.Logger = originalLogger
+	})
+
+	err := aggregator.Provide(cfgCh, pool)
+	require.NoError(t, err)
+
+	output := buf.String()
+	assert.Contains(t, output, "Starting provider *aggregator.mockNamespacedProvider (namespace: test-namespace)")
+}
+
 // requireReceivedMessageFromProviders makes sure the given providers have emitted a message on the given message channel.
 // Providers order is not enforced.
 func requireReceivedMessageFromProviders(t *testing.T, cfgCh <-chan dynamic.Message, names []string) {
@@ -76,3 +108,20 @@ func (p *providerMock) Provide(configurationChan chan<- dynamic.Message, pool *s
 
 	return nil
 }
+
+// mockNamespacedProvider is a mock implementation of NamespacedProvider for testing.
+type mockNamespacedProvider struct {
+	namespace string
+}
+
+func (m *mockNamespacedProvider) Namespace() string {
+	return m.namespace
+}
+
+func (m *mockNamespacedProvider) Provide(_ chan<- dynamic.Message, _ *safe.Pool) error {
+	return nil
+}
+
+func (m *mockNamespacedProvider) Init() error {
+	return nil
+}

pkg/provider/consulcatalog/consul_catalog.go

@@ -647,3 +647,8 @@ func repeatSend(ctx context.Context, interval time.Duration, c chan<- struct{})
 		}
 	}
 }
+
+// Namespace returns the namespace of the ConsulCatalog provider.
+func (p *Provider) Namespace() string {
+	return p.namespace
+}

pkg/provider/kv/consul/consul.go

@@ -97,3 +97,8 @@ func (p *Provider) Init() error {
 
 	return p.Provider.Init(consul.StoreName, p.name, config)
 }
+
+// Namespace returns the namespace of the Consul provider.
+func (p *Provider) Namespace() string {
+	return p.namespace
+}

pkg/provider/nomad/nomad.go

@@ -571,3 +571,8 @@ func throttleEvents(ctx context.Context, throttleDuration time.Duration, pool *s
 
 	return eventsChanBuffered
 }
+
+// Namespace returns the namespace of the Nomad provider.
+func (p *Provider) Namespace() string {
+	return p.namespace
+}

pkg/provider/provider.go

@@ -12,3 +12,14 @@ type Provider interface {
 	Provide(configurationChan chan<- dynamic.Message, pool *safe.Pool) error
 	Init() error
 }
+
+// NamespacedProvider is implemented by providers that support namespace-scoped configurations,
+// where each configured namespace results in a dedicated provider instance.
+// This enables clear identification of which namespace each provider instance serves during
+// startup logging and operational monitoring.
+type NamespacedProvider interface {
+	Provider
+
+	// Namespace returns the specific namespace this provider instance is configured for.
+	Namespace() string
+}