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telemetry_test.go
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package integration
import (
"context"
"github.com/stretchr/testify/require"
"github.com/wundergraph/cosmo/router-tests/testenv"
"github.com/wundergraph/cosmo/router/pkg/otel"
"github.com/wundergraph/cosmo/router/pkg/trace/tracetest"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
"go.opentelemetry.io/otel/sdk/instrumentation"
"go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/metric/metricdata"
"go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
"go.opentelemetry.io/otel/trace"
"net/http"
"testing"
)
func TestTelemetry(t *testing.T) {
t.Parallel()
const employeesIDData = `{"data":{"employees":[{"id":1},{"id":2},{"id":3},{"id":4},{"id":5},{"id":7},{"id":8},{"id":10},{"id":11},{"id":12}]}}`
t.Run("Trace unnamed GraphQL operation with metrics", func(t *testing.T) {
t.Parallel()
metricReader := metric.NewManualReader()
exporter := tracetest.NewInMemoryExporter(t)
testenv.Run(t, &testenv.Config{
TraceExporter: exporter,
MetricReader: metricReader,
}, func(t *testing.T, xEnv *testenv.Environment) {
res := xEnv.MakeGraphQLRequestOK(testenv.GraphQLRequest{
Query: `query { employees { id } }`,
})
require.JSONEq(t, employeesIDData, res.Body)
sn := exporter.GetSpans().Snapshots()
require.Len(t, sn, 8, "expected 8 spans, got %d", len(sn))
/**
* Spans
*/
// Pre-Handler Operation steps
require.Equal(t, "Operation - Parse", sn[0].Name())
require.Equal(t, trace.SpanKindInternal, sn[0].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[0].Status())
require.Equal(t, "Operation - Normalize", sn[1].Name())
require.Equal(t, trace.SpanKindInternal, sn[1].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[1].Status())
require.Equal(t, "Operation - Validate", sn[2].Name())
require.Equal(t, trace.SpanKindInternal, sn[2].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[2].Status())
require.Equal(t, "Operation - Plan", sn[3].Name())
require.Equal(t, trace.SpanKindInternal, sn[3].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[3].Status())
// Engine Transport
require.Equal(t, "query unnamed", sn[4].Name())
require.Equal(t, trace.SpanKindClient, sn[4].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[4].Status())
// Engine Loader Hooks
require.Equal(t, "Engine - Fetch", sn[5].Name())
require.Equal(t, trace.SpanKindInternal, sn[5].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[5].Status())
// GraphQL handler
require.Equal(t, "Operation - Execute", sn[6].Name())
require.Equal(t, trace.SpanKindInternal, sn[6].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[6].Status())
// Root Server middleware
require.Equal(t, "query unnamed", sn[7].Name())
require.Equal(t, trace.SpanKindServer, sn[7].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[7].Status())
/**
* Metrics
*/
rm := metricdata.ResourceMetrics{}
err := metricReader.Collect(context.Background(), &rm)
require.NoError(t, err)
httpRequestsMetric := metricdata.Metrics{
Name: "router.http.requests",
Description: "Total number of requests",
Unit: "",
Data: metricdata.Sum[int64]{
Temporality: metricdata.CumulativeTemporality,
IsMonotonic: true,
DataPoints: []metricdata.DataPoint[int64]{
{
Attributes: attribute.NewSet(
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgFederatedGraphID.String("graph"),
otel.WgOperationHash.String("14226210703439426856"),
otel.WgOperationName.String(""),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
otel.WgSubgraphID.String("0"),
otel.WgSubgraphName.String("employees"),
),
Value: 1,
},
{
Attributes: attribute.NewSet(
semconv.HTTPStatusCode(200),
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgFederatedGraphID.String("graph"),
otel.WgOperationHash.String("14226210703439426856"),
otel.WgOperationName.String(""),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
),
Value: 1,
},
},
},
}
requestDurationMetric := metricdata.Metrics{
Name: "router.http.request.duration_milliseconds",
Description: "Server latency in milliseconds",
Unit: "ms",
Data: metricdata.Histogram[float64]{
Temporality: metricdata.CumulativeTemporality,
DataPoints: []metricdata.HistogramDataPoint[float64]{
{
Attributes: attribute.NewSet(
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgFederatedGraphID.String("graph"),
otel.WgOperationHash.String("14226210703439426856"),
otel.WgOperationName.String(""),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
otel.WgSubgraphID.String("0"),
otel.WgSubgraphName.String("employees"),
),
Sum: 0,
},
{
Attributes: attribute.NewSet(
semconv.HTTPStatusCode(200),
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgFederatedGraphID.String("graph"),
otel.WgOperationHash.String("14226210703439426856"),
otel.WgOperationName.String(""),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
),
Sum: 0,
},
},
},
}
requestContentLengthMetric := metricdata.Metrics{
Name: "router.http.request.content_length",
Description: "Total number of request bytes",
Unit: "bytes",
Data: metricdata.Sum[int64]{
Temporality: metricdata.CumulativeTemporality,
IsMonotonic: true,
DataPoints: []metricdata.DataPoint[int64]{
{
Attributes: attribute.NewSet(
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgFederatedGraphID.String("graph"),
otel.WgOperationHash.String("14226210703439426856"),
otel.WgOperationName.String(""),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
otel.WgSubgraphID.String("0"),
otel.WgSubgraphName.String("employees"),
),
Value: 28,
},
{
Attributes: attribute.NewSet(
semconv.HTTPStatusCode(200),
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgFederatedGraphID.String("graph"),
otel.WgOperationHash.String("14226210703439426856"),
otel.WgOperationName.String(""),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
),
Value: 38,
},
},
},
}
responseContentLengthMetric := metricdata.Metrics{
Name: "router.http.response.content_length",
Description: "Total number of response bytes",
Unit: "bytes",
Data: metricdata.Sum[int64]{
Temporality: metricdata.CumulativeTemporality,
IsMonotonic: true,
DataPoints: []metricdata.DataPoint[int64]{
{
Attributes: attribute.NewSet(
semconv.HTTPStatusCode(200),
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgFederatedGraphID.String("graph"),
otel.WgOperationHash.String("14226210703439426856"),
otel.WgOperationName.String(""),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
otel.WgSubgraphID.String("0"),
otel.WgSubgraphName.String("employees"),
),
Value: 117,
},
{
Attributes: attribute.NewSet(
semconv.HTTPStatusCode(200),
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgFederatedGraphID.String("graph"),
otel.WgOperationHash.String("14226210703439426856"),
otel.WgOperationName.String(""),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
),
Value: 117,
},
},
},
}
requestInFlightMetric := metricdata.Metrics{
Name: "router.http.requests.in_flight",
Description: "Number of requests in flight",
Unit: "",
Data: metricdata.Sum[int64]{
Temporality: metricdata.CumulativeTemporality,
DataPoints: []metricdata.DataPoint[int64]{
{
Attributes: attribute.NewSet(
otel.WgFederatedGraphID.String("graph"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
),
Value: 0,
},
{
Attributes: attribute.NewSet(
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgFederatedGraphID.String("graph"),
otel.WgOperationHash.String("14226210703439426856"),
otel.WgOperationName.String(""),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgRouterClusterName.String(""),
otel.WgRouterConfigVersion.String(""),
otel.WgRouterVersion.String("dev"),
otel.WgSubgraphID.String("0"),
otel.WgSubgraphName.String("employees"),
),
Value: 0,
},
},
},
}
want := metricdata.ScopeMetrics{
Scope: instrumentation.Scope{
Name: "cosmo.router",
SchemaURL: "",
Version: "0.0.1",
},
Metrics: []metricdata.Metrics{
httpRequestsMetric,
requestDurationMetric,
requestContentLengthMetric,
responseContentLengthMetric,
requestInFlightMetric,
},
}
require.Equal(t, 1, len(rm.ScopeMetrics), "expected 1 ScopeMetrics, got %d", len(rm.ScopeMetrics))
require.Equal(t, 5, len(rm.ScopeMetrics[0].Metrics), "expected 5 Metrics, got %d", len(rm.ScopeMetrics[0].Metrics))
metricdatatest.AssertEqual(t, want, rm.ScopeMetrics[0], metricdatatest.IgnoreTimestamp(), metricdatatest.IgnoreValue())
metricdatatest.AssertEqual(t, httpRequestsMetric, rm.ScopeMetrics[0].Metrics[0], metricdatatest.IgnoreTimestamp())
metricdatatest.AssertEqual(t, requestContentLengthMetric, rm.ScopeMetrics[0].Metrics[2], metricdatatest.IgnoreTimestamp())
metricdatatest.AssertEqual(t, responseContentLengthMetric, rm.ScopeMetrics[0].Metrics[3], metricdatatest.IgnoreTimestamp())
metricdatatest.AssertEqual(t, requestInFlightMetric, rm.ScopeMetrics[0].Metrics[4], metricdatatest.IgnoreTimestamp())
})
})
t.Run("Trace named operation with parent-child relationship", func(t *testing.T) {
t.Parallel()
exporter := tracetest.NewInMemoryExporter(t)
testenv.Run(t, &testenv.Config{
TraceExporter: exporter,
}, func(t *testing.T, xEnv *testenv.Environment) {
res := xEnv.MakeGraphQLRequestOK(testenv.GraphQLRequest{
Query: `query myQuery { employees { id } }`,
})
require.JSONEq(t, employeesIDData, res.Body)
sn := exporter.GetSpans().Snapshots()
require.Len(t, sn, 8, "expected 8 spans, got %d", len(sn))
// Pre-Handler Operation steps
require.Equal(t, "Operation - Parse", sn[0].Name())
require.Equal(t, trace.SpanKindInternal, sn[0].SpanKind())
require.Equal(t, sn[0].Parent().SpanID(), sn[7].SpanContext().SpanID())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[0].Status())
require.Equal(t, "Operation - Normalize", sn[1].Name())
require.Equal(t, trace.SpanKindInternal, sn[1].SpanKind())
require.Equal(t, sn[1].Parent().SpanID(), sn[7].SpanContext().SpanID())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[1].Status())
require.Equal(t, "Operation - Validate", sn[2].Name())
require.Equal(t, trace.SpanKindInternal, sn[2].SpanKind())
require.Equal(t, sn[2].Parent().SpanID(), sn[7].SpanContext().SpanID())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[2].Status())
require.Equal(t, "Operation - Plan", sn[3].Name())
require.Equal(t, trace.SpanKindInternal, sn[3].SpanKind())
require.Equal(t, sn[3].Parent().SpanID(), sn[7].SpanContext().SpanID())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[3].Status())
// Engine Transport
require.Equal(t, "query myQuery", sn[4].Name())
require.Equal(t, trace.SpanKindClient, sn[4].SpanKind())
require.Equal(t, sn[4].Parent().SpanID(), sn[5].SpanContext().SpanID())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[4].Status())
// Engine Loader Hooks
require.Equal(t, "Engine - Fetch", sn[5].Name())
require.Equal(t, sn[5].Parent().SpanID(), sn[6].SpanContext().SpanID())
require.Equal(t, trace.SpanKindInternal, sn[5].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[5].Status())
// GraphQL handler
require.Equal(t, "Operation - Execute", sn[6].Name())
require.Equal(t, trace.SpanKindInternal, sn[6].SpanKind())
require.Equal(t, sn[6].Parent().SpanID(), sn[7].SpanContext().SpanID())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[6].Status())
// Root Server middleware
require.Equal(t, "query myQuery", sn[7].Name())
require.Equal(t, sn[7].ChildSpanCount(), 5)
require.Equal(t, trace.SpanKindServer, sn[7].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[7].Status())
})
})
t.Run("Origin connectivity issue is traced", func(t *testing.T) {
t.Parallel()
exporter := tracetest.NewInMemoryExporter(t)
testenv.Run(t, &testenv.Config{
TraceExporter: exporter,
Subgraphs: testenv.SubgraphsConfig{
Products: testenv.SubgraphConfig{
CloseOnStart: true,
},
},
}, func(t *testing.T, xEnv *testenv.Environment) {
res := xEnv.MakeGraphQLRequestOK(testenv.GraphQLRequest{
Query: `{ employees { id details { forename surname } notes } }`,
})
require.Equal(t, `{"errors":[{"message":"Failed to fetch from Subgraph '3' at Path 'query.employees.@'."}],"data":{"employees":[{"id":1,"details":{"forename":"Jens","surname":"Neuse"},"notes":null},{"id":2,"details":{"forename":"Dustin","surname":"Deus"},"notes":null},{"id":3,"details":{"forename":"Stefan","surname":"Avram"},"notes":null},{"id":4,"details":{"forename":"Björn","surname":"Schwenzer"},"notes":null},{"id":5,"details":{"forename":"Sergiy","surname":"Petrunin"},"notes":null},{"id":7,"details":{"forename":"Suvij","surname":"Surya"},"notes":null},{"id":8,"details":{"forename":"Nithin","surname":"Kumar"},"notes":null},{"id":10,"details":{"forename":"Eelco","surname":"Wiersma"},"notes":null},{"id":11,"details":{"forename":"Alexandra","surname":"Neuse"},"notes":null},{"id":12,"details":{"forename":"David","surname":"Stutt"},"notes":null}]}}`, res.Body)
sn := exporter.GetSpans().Snapshots()
require.Len(t, sn, 10, "expected 10 spans, got %d", len(sn))
require.Equal(t, "Engine - Fetch", sn[5].Name())
require.Equal(t, trace.SpanKindInternal, sn[5].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[5].Status())
require.Equal(t, "Engine - Fetch", sn[7].Name())
require.Equal(t, trace.SpanKindInternal, sn[7].SpanKind())
require.Equal(t, codes.Error, sn[7].Status().Code)
require.Contains(t, sn[7].Status().Description, "connect: connection refused\nFailed to fetch from Subgraph '3' at Path: 'query.employees.@'.")
events := sn[7].Events()
require.Len(t, events, 1, "expected 1 event because the GraphQL request failed")
require.Equal(t, "exception", events[0].Name)
})
})
t.Run("Subgraph error produces a span event per GraphQL error", func(t *testing.T) {
exporter := tracetest.NewInMemoryExporter(t)
testenv.Run(t, &testenv.Config{
TraceExporter: exporter,
Subgraphs: testenv.SubgraphsConfig{
Products: testenv.SubgraphConfig{
Middleware: func(handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusForbidden)
_, _ = w.Write([]byte(`{"errors":[{"message":"Unauthorized","path": ["foo"],"extensions":{"code":"UNAUTHORIZED"}},{"message":"MyErrorMessage","path": ["bar"],"extensions":{"code":"YOUR_ERROR_CODE"}}]}`))
})
},
},
},
}, func(t *testing.T, xEnv *testenv.Environment) {
res := xEnv.MakeGraphQLRequestOK(testenv.GraphQLRequest{
Query: `query myQuery { employees { id details { forename surname } notes } }`,
})
require.Equal(t, `{"errors":[{"message":"Failed to fetch from Subgraph '3' at Path 'query.employees.@'.","extensions":{"errors":[{"message":"Unauthorized","path":["foo"],"extensions":{"code":"UNAUTHORIZED"}},{"message":"MyErrorMessage","path":["bar"],"extensions":{"code":"YOUR_ERROR_CODE"}}],"statusCode":403}}],"data":{"employees":[{"id":1,"details":{"forename":"Jens","surname":"Neuse"},"notes":null},{"id":2,"details":{"forename":"Dustin","surname":"Deus"},"notes":null},{"id":3,"details":{"forename":"Stefan","surname":"Avram"},"notes":null},{"id":4,"details":{"forename":"Björn","surname":"Schwenzer"},"notes":null},{"id":5,"details":{"forename":"Sergiy","surname":"Petrunin"},"notes":null},{"id":7,"details":{"forename":"Suvij","surname":"Surya"},"notes":null},{"id":8,"details":{"forename":"Nithin","surname":"Kumar"},"notes":null},{"id":10,"details":{"forename":"Eelco","surname":"Wiersma"},"notes":null},{"id":11,"details":{"forename":"Alexandra","surname":"Neuse"},"notes":null},{"id":12,"details":{"forename":"David","surname":"Stutt"},"notes":null}]}}`, res.Body)
sn := exporter.GetSpans().Snapshots()
require.Len(t, sn, 10, "expected 10 spans, got %d", len(sn))
// The request to the employees subgraph succeeded
require.Equal(t, "Engine - Fetch", sn[5].Name())
require.Equal(t, trace.SpanKindInternal, sn[5].SpanKind())
require.Equal(t, sdktrace.Status{Code: codes.Unset}, sn[5].Status())
given := attribute.NewSet(sn[5].Attributes()...)
want := attribute.NewSet([]attribute.KeyValue{
semconv.HTTPStatusCode(200),
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgComponentName.String("engine-loader"),
otel.WgOperationHash.String("16884868987896027258"),
otel.WgOperationName.String("myQuery"),
otel.WgOperationProtocol.String("http"),
otel.WgOperationType.String("query"),
otel.WgSubgraphName.String("employees"),
otel.WgSubgraphID.String("0"),
}...)
require.True(t, given.Equals(&want))
// The request to the products subgraph failed with a 403 status code
require.Equal(t, "Engine - Fetch", sn[7].Name())
require.Equal(t, trace.SpanKindInternal, sn[7].SpanKind())
given = attribute.NewSet(sn[7].Attributes()...)
want = attribute.NewSet([]attribute.KeyValue{
otel.WgSubgraphName.String("products"),
otel.WgSubgraphID.String("3"),
semconv.HTTPStatusCode(403),
otel.WgComponentName.String("engine-loader"),
otel.WgClientName.String("unknown"),
otel.WgClientVersion.String("missing"),
otel.WgOperationName.String("myQuery"),
otel.WgOperationType.String("query"),
otel.WgOperationProtocol.String("http"),
otel.WgOperationHash.String("16884868987896027258"),
// Downstream errors
otel.WgSubgraphErrorExtendedCode.String("UNAUTHORIZED,YOUR_ERROR_CODE"),
}...)
require.True(t, given.Equals(&want))
require.Equal(t, sdktrace.Status{Code: codes.Error, Description: `Failed to fetch from Subgraph '3' at Path: 'query.employees.@'.
Downstream errors:
1. Subgraph error at Path 'foo', Message: Unauthorized, Extension Code: UNAUTHORIZED.
2. Subgraph error at Path 'bar', Message: MyErrorMessage, Extension Code: YOUR_ERROR_CODE.
`}, sn[7].Status())
events := sn[7].Events()
require.Len(t, events, 3, "expected 2 events, one for the fetch and one two downstream GraphQL errors")
require.Equal(t, "exception", events[0].Name)
require.Equal(t, "Downstream error 1", events[1].Name)
require.Equal(t, []attribute.KeyValue{
otel.WgSubgraphErrorExtendedCode.String("UNAUTHORIZED"),
otel.WgSubgraphErrorMessage.String("Unauthorized"),
}, events[1].Attributes)
require.Equal(t, "Downstream error 2", events[2].Name)
require.Equal(t, []attribute.KeyValue{
otel.WgSubgraphErrorExtendedCode.String("YOUR_ERROR_CODE"),
otel.WgSubgraphErrorMessage.String("MyErrorMessage"),
}, events[2].Attributes)
})
})
}