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Introduce trace verbosity config and produce less spans by default

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Romain 2025-07-18 15:32:05 +02:00 • committed by GitHub
parent 77ef7fe490
commit 8c23eb6833
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GPG key ID: B5690EEEBB952194
93 changed files with 1005 additions and 524 deletions
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10
pkg/proxy/httputil/builder.go
View file

@ -38,17 +38,15 @@ func NewProxyBuilder(transportManager TransportManager, semConvMetricsRegistry *
func (r *ProxyBuilder) Update(_ map[string]*dynamic.ServersTransport) {}
// Build builds a new httputil.ReverseProxy with the given configuration.
func (r *ProxyBuilder) Build(cfgName string, targetURL *url.URL, shouldObserve, passHostHeader, preservePath bool, flushInterval time.Duration) (http.Handler, error) {
func (r *ProxyBuilder) Build(cfgName string, targetURL *url.URL, passHostHeader, preservePath bool, flushInterval time.Duration) (http.Handler, error) {
roundTripper, err := r.transportManager.GetRoundTripper(cfgName)
if err != nil {
return nil, fmt.Errorf("getting RoundTripper: %w", err)
}
if shouldObserve {
// Wrapping the roundTripper with the Tracing roundTripper,
// to handle the reverseProxy client span creation.
roundTripper = newObservabilityRoundTripper(r.semConvMetricsRegistry, roundTripper)
}
// Wrapping the roundTripper with the Tracing roundTripper,
// to create, if necessary, the reverseProxy client span and the semConv client metric.
roundTripper = newObservabilityRoundTripper(r.semConvMetricsRegistry, roundTripper)
return buildSingleHostProxy(targetURL, passHostHeader, preservePath, flushInterval, roundTripper, r.bufferPool), nil
}

2
pkg/proxy/httputil/builder_test.go
View file

@ -23,7 +23,7 @@ func TestEscapedPath(t *testing.T) {
roundTrippers: map[string]http.RoundTripper{"default": &http.Transport{}},
}
p, err := NewProxyBuilder(transportManager, nil).Build("default", testhelpers.MustParseURL(srv.URL), false, true, false, 0)
p, err := NewProxyBuilder(transportManager, nil).Build("default", testhelpers.MustParseURL(srv.URL), true, false, 0)
require.NoError(t, err)
proxy := httptest.NewServer(http.HandlerFunc(p.ServeHTTP))

68
pkg/proxy/httputil/observability.go
View file

@ -35,7 +35,7 @@ func (t *wrapper) RoundTrip(req *http.Request) (*http.Response, error) {
var span trace.Span
var tracingCtx context.Context
var tracer *tracing.Tracer
if tracer = tracing.TracerFromContext(req.Context()); tracer != nil {
if tracer = tracing.TracerFromContext(req.Context()); tracer != nil && observability.TracingEnabled(req.Context()) {
tracingCtx, span = tracer.Start(req.Context(), "ReverseProxy", trace.WithSpanKind(trace.SpanKindClient))
defer span.End()
@ -68,38 +68,42 @@ func (t *wrapper) RoundTrip(req *http.Request) (*http.Response, error) {
span.End(trace.WithTimestamp(end))
}
if req.Context().Value(observability.DisableMetricsKey) == nil && t.semConvMetricRegistry != nil && t.semConvMetricRegistry.HTTPClientRequestDuration() != nil {
var attrs []attribute.KeyValue
if statusCode < 100 || statusCode >= 600 {
attrs = append(attrs, attribute.Key("error.type").String(fmt.Sprintf("Invalid HTTP status code %d", statusCode)))
} else if statusCode >= 400 {
attrs = append(attrs, attribute.Key("error.type").String(strconv.Itoa(statusCode)))
}
attrs = append(attrs, semconv.HTTPRequestMethodKey.String(req.Method))
attrs = append(attrs, semconv.HTTPResponseStatusCode(statusCode))
attrs = append(attrs, semconv.NetworkProtocolName(strings.ToLower(req.Proto)))
attrs = append(attrs, semconv.NetworkProtocolVersion(observability.Proto(req.Proto)))
attrs = append(attrs, semconv.ServerAddress(req.URL.Host))
_, port, err := net.SplitHostPort(req.URL.Host)
if err != nil {
switch req.URL.Scheme {
case "http":
attrs = append(attrs, semconv.ServerPort(80))
case "https":
attrs = append(attrs, semconv.ServerPort(443))
}
} else {
intPort, _ := strconv.Atoi(port)
attrs = append(attrs, semconv.ServerPort(intPort))
}
attrs = append(attrs, semconv.URLScheme(req.Header.Get("X-Forwarded-Proto")))
t.semConvMetricRegistry.HTTPClientRequestDuration().Record(req.Context(), end.Sub(start).Seconds(), metric.WithAttributes(attrs...))
if !observability.SemConvMetricsEnabled(req.Context()) ||
t.semConvMetricRegistry == nil ||
t.semConvMetricRegistry.HTTPClientRequestDuration() == nil {
return response, err
}
var attrs []attribute.KeyValue
if statusCode < 100 || statusCode >= 600 {
attrs = append(attrs, attribute.Key("error.type").String(fmt.Sprintf("Invalid HTTP status code %d", statusCode)))
} else if statusCode >= 400 {
attrs = append(attrs, attribute.Key("error.type").String(strconv.Itoa(statusCode)))
}
attrs = append(attrs, semconv.HTTPRequestMethodKey.String(req.Method))
attrs = append(attrs, semconv.HTTPResponseStatusCode(statusCode))
attrs = append(attrs, semconv.NetworkProtocolName(strings.ToLower(req.Proto)))
attrs = append(attrs, semconv.NetworkProtocolVersion(observability.Proto(req.Proto)))
attrs = append(attrs, semconv.ServerAddress(req.URL.Host))
_, port, splitErr := net.SplitHostPort(req.URL.Host)
if splitErr != nil {
switch req.URL.Scheme {
case "http":
attrs = append(attrs, semconv.ServerPort(80))
case "https":
attrs = append(attrs, semconv.ServerPort(443))
}
} else {
intPort, _ := strconv.Atoi(port)
attrs = append(attrs, semconv.ServerPort(intPort))
}
attrs = append(attrs, semconv.URLScheme(req.Header.Get("X-Forwarded-Proto")))
t.semConvMetricRegistry.HTTPClientRequestDuration().Record(req.Context(), end.Sub(start).Seconds(), metric.WithAttributes(attrs...))
return response, err
}

6
pkg/proxy/httputil/observability_test.go
View file

@ -9,6 +9,7 @@ import (
"github.com/stretchr/testify/require"
ptypes "github.com/traefik/paerser/types"
"github.com/traefik/traefik/v3/pkg/metrics"
"github.com/traefik/traefik/v3/pkg/middlewares/observability"
"github.com/traefik/traefik/v3/pkg/types"
"go.opentelemetry.io/otel/attribute"
sdkmetric "go.opentelemetry.io/otel/sdk/metric"
@ -77,6 +78,11 @@ func TestObservabilityRoundTripper_metrics(t *testing.T) {
req.Header.Set("User-Agent", "rt-test")
req.Header.Set("X-Forwarded-Proto", "http")
// Injection of the observability variables in the request context.
req = req.WithContext(observability.WithObservability(req.Context(), observability.Observability{
SemConvMetricsEnabled: true,
}))
ort := newObservabilityRoundTripper(semConvMetricRegistry, mockRoundTripper{statusCode: test.statusCode})
_, err = ort.RoundTrip(req)
require.NoError(t, err)

6
pkg/proxy/httputil/proxy_websocket_test.go
View file

@ -301,7 +301,7 @@ func TestWebSocketRequestWithHeadersInResponseWriter(t *testing.T) {
},
}
p, err := NewProxyBuilder(transportManager, nil).Build("default@internal", testhelpers.MustParseURL(srv.URL), false, true, false, 0)
p, err := NewProxyBuilder(transportManager, nil).Build("default@internal", testhelpers.MustParseURL(srv.URL), true, false, 0)
require.NoError(t, err)
proxy := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
req.URL = testhelpers.MustParseURL(srv.URL)
@ -357,7 +357,7 @@ func TestWebSocketUpgradeFailed(t *testing.T) {
},
}
p, err := NewProxyBuilder(transportManager, nil).Build("default@internal", testhelpers.MustParseURL(srv.URL), false, true, false, 0)
p, err := NewProxyBuilder(transportManager, nil).Build("default@internal", testhelpers.MustParseURL(srv.URL), true, false, 0)
require.NoError(t, err)
proxy := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
path := req.URL.Path // keep the original path
@ -618,7 +618,7 @@ func createProxyWithForwarder(t *testing.T, uri string, transport http.RoundTrip
roundTrippers: map[string]http.RoundTripper{"fwd": transport},
}
p, err := NewProxyBuilder(transportManager, nil).Build("fwd", u, false, true, false, 0)
p, err := NewProxyBuilder(transportManager, nil).Build("fwd", u, true, false, 0)
require.NoError(t, err)
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {