mirror of
https://github.com/pomerium/pomerium.git
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336 lines
11 KiB
Go
336 lines
11 KiB
Go
package trace_test
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import (
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"context"
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"errors"
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"net"
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"net/http"
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"net/http/httptest"
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"testing"
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"time"
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"github.com/pomerium/pomerium/internal/telemetry/trace"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
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"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
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oteltrace "go.opentelemetry.io/otel/trace"
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"go.opentelemetry.io/otel/trace/noop"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/interop/grpc_testing"
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"google.golang.org/grpc/metadata"
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"google.golang.org/grpc/stats"
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"google.golang.org/grpc/test/bufconn"
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)
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var cases = []struct {
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name string
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setTraceparent string
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setPomeriumTraceparent string
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check func(t testing.TB, ctx context.Context)
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}{
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{
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name: "x-pomerium-traceparent not present",
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setTraceparent: Traceparent(Trace(1), Span(1), true),
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check: func(t testing.TB, ctx context.Context) {
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span := oteltrace.SpanFromContext(ctx)
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assert.Equal(t, Trace(1).ID().Value(), span.SpanContext().TraceID())
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assert.Equal(t, Span(1).ID(), span.SpanContext().SpanID())
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assert.True(t, span.SpanContext().IsSampled())
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},
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},
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{
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name: "x-pomerium-traceparent present",
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setTraceparent: Traceparent(Trace(2), Span(2), true),
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setPomeriumTraceparent: Traceparent(Trace(1), Span(1), true),
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check: func(t testing.TB, ctx context.Context) {
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span := oteltrace.SpanFromContext(ctx)
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assert.Equal(t, Trace(1).ID().Value(), span.SpanContext().TraceID())
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assert.Equal(t, Span(2).ID(), span.SpanContext().SpanID())
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assert.True(t, span.SpanContext().IsSampled())
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},
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},
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{
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name: "x-pomerium-traceparent present, force sampling off",
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setTraceparent: Traceparent(Trace(2), Span(2), true),
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setPomeriumTraceparent: Traceparent(Trace(1), Span(1), false),
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check: func(t testing.TB, ctx context.Context) {
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span := oteltrace.SpanFromContext(ctx)
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assert.Equal(t, Trace(1).ID().Value(), span.SpanContext().TraceID())
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assert.Equal(t, Span(2).ID(), span.SpanContext().SpanID())
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assert.Equal(t, false, span.SpanContext().IsSampled())
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},
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},
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{
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name: "x-pomerium-traceparent present, force sampling on",
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setTraceparent: Traceparent(Trace(2), Span(2), false),
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setPomeriumTraceparent: Traceparent(Trace(1), Span(1), true),
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check: func(t testing.TB, ctx context.Context) {
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span := oteltrace.SpanFromContext(ctx)
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assert.Equal(t, Trace(1).ID().Value(), span.SpanContext().TraceID())
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assert.Equal(t, Span(2).ID(), span.SpanContext().SpanID())
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assert.Equal(t, true, span.SpanContext().IsSampled())
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},
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},
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{
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name: "malformed x-pomerium-traceparent",
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setTraceparent: Traceparent(Trace(2), Span(2), false),
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setPomeriumTraceparent: "00-xxxxxx-yyyyyy-03",
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check: func(t testing.TB, ctx context.Context) {
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span := oteltrace.SpanFromContext(ctx)
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assert.Equal(t, Trace(2).ID().Value(), span.SpanContext().TraceID())
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assert.Equal(t, Span(2).ID(), span.SpanContext().SpanID())
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assert.Equal(t, false, span.SpanContext().IsSampled())
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},
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},
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}
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func TestHTTPMiddleware(t *testing.T) {
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for _, tc := range cases {
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t.Run(tc.name, func(t *testing.T) {
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r := httptest.NewRequest(http.MethodGet, "/foo", nil)
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if tc.setTraceparent != "" {
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r.Header.Add("Traceparent", tc.setTraceparent)
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}
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if tc.setPomeriumTraceparent != "" {
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r.Header.Add("X-Pomerium-Traceparent", tc.setPomeriumTraceparent)
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}
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w := httptest.NewRecorder()
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trace.NewHTTPMiddleware(
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otelhttp.WithTracerProvider(noop.NewTracerProvider()),
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)(http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
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tc.check(t, r.Context())
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})).ServeHTTP(w, r)
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})
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}
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}
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func TestGRPCMiddleware(t *testing.T) {
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for _, tc := range cases {
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t.Run(tc.name, func(t *testing.T) {
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srv := grpc.NewServer(
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grpc.StatsHandler(trace.NewServerStatsHandler(otelgrpc.NewServerHandler(
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otelgrpc.WithTracerProvider(noop.NewTracerProvider())))),
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grpc.Creds(insecure.NewCredentials()),
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)
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lis := bufconn.Listen(4096)
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grpc_testing.RegisterTestServiceServer(srv, &testServer{
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fn: func(ctx context.Context) {
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tc.check(t, ctx)
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},
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})
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go srv.Serve(lis)
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t.Cleanup(srv.Stop)
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client, err := grpc.NewClient("passthrough://ignore",
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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grpc.WithStatsHandler(otelgrpc.NewClientHandler(
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otelgrpc.WithTracerProvider(noop.NewTracerProvider()))),
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grpc.WithContextDialer(func(ctx context.Context, _ string) (net.Conn, error) {
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return lis.DialContext(ctx)
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}),
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)
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require.NoError(t, err)
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ctx := context.Background()
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if tc.setTraceparent != "" {
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ctx = metadata.AppendToOutgoingContext(ctx,
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"traceparent", tc.setTraceparent,
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)
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}
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if tc.setPomeriumTraceparent != "" {
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ctx = metadata.AppendToOutgoingContext(ctx,
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"x-pomerium-traceparent", tc.setPomeriumTraceparent,
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)
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}
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_, err = grpc_testing.NewTestServiceClient(client).EmptyCall(ctx, &grpc_testing.Empty{})
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assert.NoError(t, err)
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})
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}
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}
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type testServer struct {
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grpc_testing.UnimplementedTestServiceServer
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fn func(ctx context.Context)
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}
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func (ts *testServer) EmptyCall(ctx context.Context, _ *grpc_testing.Empty) (*grpc_testing.Empty, error) {
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ts.fn(ctx)
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return &grpc_testing.Empty{}, nil
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}
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type mockHandler struct {
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handleConn func(ctx context.Context, stats stats.ConnStats)
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handleRPC func(ctx context.Context, stats stats.RPCStats)
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tagConn func(ctx context.Context, info *stats.ConnTagInfo) context.Context
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tagRPC func(ctx context.Context, info *stats.RPCTagInfo) context.Context
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}
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// HandleConn implements stats.Handler.
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func (m *mockHandler) HandleConn(ctx context.Context, stats stats.ConnStats) {
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m.handleConn(ctx, stats)
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}
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// HandleRPC implements stats.Handler.
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func (m *mockHandler) HandleRPC(ctx context.Context, stats stats.RPCStats) {
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m.handleRPC(ctx, stats)
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}
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// TagConn implements stats.Handler.
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func (m *mockHandler) TagConn(ctx context.Context, info *stats.ConnTagInfo) context.Context {
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return m.tagConn(ctx, info)
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}
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// TagRPC implements stats.Handler.
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func (m *mockHandler) TagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {
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return m.tagRPC(ctx, info)
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}
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var _ stats.Handler = (*mockHandler)(nil)
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func TestStatsInterceptor(t *testing.T) {
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var outBegin *stats.Begin
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var outEnd *stats.End
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base := &mockHandler{
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handleRPC: func(_ context.Context, rs stats.RPCStats) {
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switch rs := rs.(type) {
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case *stats.Begin:
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outBegin = rs
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case *stats.End:
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outEnd = rs
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}
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},
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}
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interceptor := func(_ context.Context, rs stats.RPCStats) stats.RPCStats {
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switch rs := rs.(type) {
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case *stats.Begin:
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return &stats.Begin{
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Client: rs.Client,
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BeginTime: rs.BeginTime.Add(-1 * time.Minute),
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FailFast: rs.FailFast,
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IsClientStream: rs.IsClientStream,
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IsServerStream: rs.IsServerStream,
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IsTransparentRetryAttempt: rs.IsTransparentRetryAttempt,
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}
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case *stats.End:
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return &stats.End{
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Client: rs.Client,
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BeginTime: rs.BeginTime,
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EndTime: rs.EndTime,
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Trailer: rs.Trailer,
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Error: errors.New("modified"),
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}
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}
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return rs
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}
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handler := trace.NewClientStatsHandler(
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base,
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trace.WithStatsInterceptor(interceptor),
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)
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inBegin := &stats.Begin{
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Client: true,
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BeginTime: time.Now(),
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FailFast: true,
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IsClientStream: true,
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IsServerStream: false,
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IsTransparentRetryAttempt: false,
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}
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handler.HandleRPC(context.Background(), inBegin)
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assert.NotNil(t, outBegin)
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assert.NotSame(t, inBegin, outBegin)
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assert.Equal(t, inBegin.BeginTime.Add(-1*time.Minute), outBegin.BeginTime)
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assert.Equal(t, inBegin.Client, outBegin.Client)
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assert.Equal(t, inBegin.FailFast, outBegin.FailFast)
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assert.Equal(t, inBegin.IsClientStream, outBegin.IsClientStream)
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assert.Equal(t, inBegin.IsServerStream, outBegin.IsServerStream)
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assert.Equal(t, inBegin.IsTransparentRetryAttempt, outBegin.IsTransparentRetryAttempt)
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inEnd := &stats.End{
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Client: true,
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BeginTime: time.Now(),
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EndTime: time.Now().Add(1 * time.Minute),
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Trailer: metadata.Pairs("a", "b", "c", "d"),
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Error: errors.New("input"),
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}
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handler.HandleRPC(context.Background(), inEnd)
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assert.NotNil(t, outEnd)
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assert.NotSame(t, inEnd, outEnd)
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assert.Equal(t, inEnd.Client, outEnd.Client)
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assert.Equal(t, inEnd.BeginTime, outEnd.BeginTime)
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assert.Equal(t, inEnd.EndTime, outEnd.EndTime)
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assert.Equal(t, inEnd.Trailer, outEnd.Trailer)
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assert.Equal(t, "input", inEnd.Error.Error())
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assert.Equal(t, "modified", outEnd.Error.Error())
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}
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func TestStatsInterceptor_Nil(t *testing.T) {
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var outCtx context.Context
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var outConnStats stats.ConnStats
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var outRPCStats stats.RPCStats
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var outConnTagInfo *stats.ConnTagInfo
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var outRPCTagInfo *stats.RPCTagInfo
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base := &mockHandler{
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handleConn: func(ctx context.Context, stats stats.ConnStats) {
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outCtx = ctx
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outConnStats = stats
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},
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handleRPC: func(ctx context.Context, stats stats.RPCStats) {
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outCtx = ctx
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outRPCStats = stats
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},
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tagConn: func(ctx context.Context, info *stats.ConnTagInfo) context.Context {
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outCtx = ctx
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outConnTagInfo = info
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return ctx
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},
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tagRPC: func(ctx context.Context, info *stats.RPCTagInfo) context.Context {
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outCtx = ctx
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outRPCTagInfo = info
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return ctx
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},
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}
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handler := trace.NewClientStatsHandler(
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base,
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trace.WithStatsInterceptor(nil),
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)
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inCtx := context.Background()
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inConnStats := &stats.ConnBegin{}
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inRPCStats := &stats.Begin{}
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inConnTagInfo := &stats.ConnTagInfo{}
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inRPCTagInfo := &stats.RPCTagInfo{}
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handler.HandleConn(inCtx, inConnStats)
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assert.Equal(t, inCtx, outCtx)
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assert.Same(t, inConnStats, outConnStats)
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handler.HandleRPC(inCtx, inRPCStats)
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assert.Equal(t, inCtx, outCtx)
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assert.Same(t, inRPCStats, outRPCStats)
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handler.TagConn(inCtx, inConnTagInfo)
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assert.Equal(t, inCtx, outCtx)
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assert.Same(t, inConnTagInfo, outConnTagInfo)
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handler.TagRPC(inCtx, inRPCTagInfo)
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assert.Equal(t, inCtx, outCtx)
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assert.Same(t, inRPCTagInfo, outRPCTagInfo)
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}
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func TestStatsInterceptor_Bug(t *testing.T) {
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handler := trace.NewClientStatsHandler(
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&mockHandler{
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handleRPC: func(_ context.Context, _ stats.RPCStats) {
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t.Error("should not be reached")
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},
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},
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trace.WithStatsInterceptor(func(_ context.Context, rs stats.RPCStats) stats.RPCStats {
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_ = rs.(*stats.Begin)
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return &stats.End{}
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}),
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)
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assert.PanicsWithValue(t, "bug: stats interceptor returned a message of a different type", func() {
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handler.HandleRPC(context.Background(), &stats.Begin{})
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})
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}
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