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Add captured headers options for tracing

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Co-authored-by: Baptiste Mayelle <baptiste.mayelle@traefik.io>
This commit is contained in:
Romain 2024-03-11 11:50:04 +01:00 • committed by GitHub
parent 86be0a4e6f
commit 709ff6fb09
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GPG key ID: B5690EEEBB952194
15 changed files with 520 additions and 119 deletions
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186
pkg/middlewares/auth/forward_test.go
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@ -4,27 +4,25 @@ import (
"context"
"fmt"
"io"
"net"
"net/http"
"net/http/httptest"
"net/url"
"strconv"
"testing"
"github.com/containous/alice"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/traefik/traefik/v3/pkg/config/dynamic"
"github.com/traefik/traefik/v3/pkg/config/static"
tracingMiddleware "github.com/traefik/traefik/v3/pkg/middlewares/tracing"
"github.com/traefik/traefik/v3/pkg/testhelpers"
"github.com/traefik/traefik/v3/pkg/tracing"
"github.com/traefik/traefik/v3/pkg/tracing/opentelemetry"
"github.com/traefik/traefik/v3/pkg/types"
"github.com/traefik/traefik/v3/pkg/version"
"github.com/vulcand/oxy/v2/forward"
"go.opentelemetry.io/contrib/propagators/autoprop"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/sdk/trace/tracetest"
semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
"go.opentelemetry.io/otel/trace"
"go.opentelemetry.io/otel/trace/embedded"
)
func TestForwardAuthFail(t *testing.T) {
@ -466,64 +464,146 @@ func Test_writeHeader(t *testing.T) {
}
}
func TestForwardAuthUsesTracing(t *testing.T) {
func TestForwardAuthTracing(t *testing.T) {
type expected struct {
name string
attributes []attribute.KeyValue
}
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Traceparent") == "" {
t.Errorf("expected Traceparent header to be present in request")
}
w.Header().Set("X-Bar", "foo")
w.Header().Add("X-Bar", "bar")
w.WriteHeader(http.StatusNotFound)
}))
t.Cleanup(server.Close)
next := http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}))
auth := dynamic.ForwardAuth{
Address: server.URL,
}
exporter := tracetest.NewInMemoryExporter()
tres, err := resource.New(context.Background(),
resource.WithAttributes(semconv.ServiceNameKey.String("traefik")),
resource.WithAttributes(semconv.ServiceVersionKey.String(version.Version)),
resource.WithFromEnv(),
resource.WithTelemetrySDK(),
)
parse, err := url.Parse(server.URL)
require.NoError(t, err)
tracerProvider := sdktrace.NewTracerProvider(
sdktrace.WithSampler(sdktrace.AlwaysSample()),
sdktrace.WithResource(tres),
sdktrace.WithBatcher(exporter),
)
otel.SetTracerProvider(tracerProvider)
_, serverPort, err := net.SplitHostPort(parse.Host)
require.NoError(t, err)
config := &static.Tracing{
ServiceName: "testApp",
SampleRate: 1,
OTLP: &opentelemetry.Config{
HTTP: &types.OtelHTTP{
Endpoint: "http://127.0.0.1:8080",
serverPortInt, err := strconv.Atoi(serverPort)
require.NoError(t, err)
testCases := []struct {
desc string
expected []expected
}{
{
desc: "basic test",
expected: []expected{
{
name: "initial",
attributes: []attribute.KeyValue{
attribute.String("span.kind", "unspecified"),
},
},
{
name: "AuthRequest",
attributes: []attribute.KeyValue{
attribute.String("span.kind", "client"),
attribute.String("http.request.method", "GET"),
attribute.String("network.protocol.version", "1.1"),
attribute.String("url.full", server.URL),
attribute.String("url.scheme", "http"),
attribute.String("user_agent.original", ""),
attribute.String("network.peer.address", "127.0.0.1"),
attribute.String("network.peer.port", serverPort),
attribute.String("server.address", "127.0.0.1"),
attribute.Int64("server.port", int64(serverPortInt)),
attribute.StringSlice("http.request.header.x-foo", []string{"foo", "bar"}),
attribute.Int64("http.response.status_code", int64(404)),
attribute.StringSlice("http.response.header.x-bar", []string{"foo", "bar"}),
},
},
},
},
}
tr, closer, err := tracing.NewTracing(config)
require.NoError(t, err)
t.Cleanup(func() {
_ = closer.Close()
})
next, err = NewForward(context.Background(), next, auth, "authTest")
require.NoError(t, err)
for _, test := range testCases {
t.Run(test.desc, func(t *testing.T) {
next := http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}))
chain := alice.New(tracingMiddleware.WrapEntryPointHandler(context.Background(), tr, "tracingTest"))
next, err = chain.Then(next)
require.NoError(t, err)
auth := dynamic.ForwardAuth{
Address: server.URL,
AuthRequestHeaders: []string{"X-Foo"},
}
next, err := NewForward(context.Background(), next, auth, "authTest")
require.NoError(t, err)
ts := httptest.NewServer(next)
t.Cleanup(ts.Close)
req := httptest.NewRequest(http.MethodGet, "http://www.test.com/search?q=Opentelemetry", nil)
req.RemoteAddr = "10.0.0.1:1234"
req.Header.Set("User-Agent", "forward-test")
req.Header.Set("X-Forwarded-Proto", "http")
req.Header.Set("X-Foo", "foo")
req.Header.Add("X-Foo", "bar")
req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
res, err := http.DefaultClient.Do(req)
require.NoError(t, err)
assert.Equal(t, http.StatusOK, res.StatusCode)
otel.SetTextMapPropagator(autoprop.NewTextMapPropagator())
mockTracer := &mockTracer{}
tracer := tracing.NewTracer(mockTracer, []string{"X-Foo"}, []string{"X-Bar"})
initialCtx, initialSpan := tracer.Start(req.Context(), "initial")
defer initialSpan.End()
req = req.WithContext(initialCtx)
recorder := httptest.NewRecorder()
next.ServeHTTP(recorder, req)
for i, span := range mockTracer.spans {
assert.Equal(t, test.expected[i].name, span.name)
assert.Equal(t, test.expected[i].attributes, span.attributes)
}
})
}
}
type mockTracer struct {
embedded.Tracer
spans []*mockSpan
}
var _ trace.Tracer = &mockTracer{}
func (t *mockTracer) Start(ctx context.Context, name string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
config := trace.NewSpanStartConfig(opts...)
span := &mockSpan{}
span.SetName(name)
span.SetAttributes(attribute.String("span.kind", config.SpanKind().String()))
span.SetAttributes(config.Attributes()...)
t.spans = append(t.spans, span)
return trace.ContextWithSpan(ctx, span), span
}
// mockSpan is an implementation of Span that preforms no operations.
type mockSpan struct {
embedded.Span
name string
attributes []attribute.KeyValue
}
var _ trace.Span = &mockSpan{}
func (*mockSpan) SpanContext() trace.SpanContext {
return trace.NewSpanContext(trace.SpanContextConfig{TraceID: trace.TraceID{1}, SpanID: trace.SpanID{1}})
}
func (*mockSpan) IsRecording() bool { return false }
func (s *mockSpan) SetStatus(_ codes.Code, _ string) {}
func (s *mockSpan) SetAttributes(kv ...attribute.KeyValue) {
s.attributes = append(s.attributes, kv...)
}
func (s *mockSpan) End(...trace.SpanEndOption) {}
func (s *mockSpan) RecordError(_ error, _ ...trace.EventOption) {}
func (s *mockSpan) AddEvent(_ string, _ ...trace.EventOption) {}
func (s *mockSpan) SetName(name string) { s.name = name }
func (s *mockSpan) TracerProvider() trace.TracerProvider {
return nil
}