/
request_metadata_tracing_interceptor.go
67 lines (58 loc) · 2.53 KB
/
request_metadata_tracing_interceptor.go
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package grpc
import (
"context"
remoteexecution "github.com/bazelbuild/remote-apis/build/bazel/remote/execution/v2"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
"google.golang.org/protobuf/proto"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
// RequestMetadataTracingUnaryInterceptor is a gRPC unary server
// interceptor that adds additional information about the RPC from the
// REv2 RequestMetadata into the current trace span.
func RequestMetadataTracingUnaryInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
addRequestMetadataToSpan(ctx)
return handler(ctx, req)
}
// RequestMetadataTracingStreamInterceptor is a gRPC streaming server
// interceptor that adds additional information about the RPC from the
// REv2 RequestMetadata into the current trace span.
func RequestMetadataTracingStreamInterceptor(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
addRequestMetadataToSpan(ss.Context())
return handler(srv, ss)
}
func addRequestMetadataToSpan(ctx context.Context) {
// Skip all of the code below when this request isn't being traced.
span := trace.SpanFromContext(ctx)
if !span.IsRecording() {
return
}
// Extract the RequestMetadata from gRPC metadata.
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
return
}
rmds := md.Get("build.bazel.remote.execution.v2.requestmetadata-bin")
if len(rmds) == 0 {
return
}
var requestMetadata remoteexecution.RequestMetadata
if err := proto.Unmarshal([]byte(rmds[0]), &requestMetadata); err != nil {
return
}
attributes := append(
make([]attribute.KeyValue, 0, 8),
attribute.String("request_metadata.action_id", requestMetadata.ActionId),
attribute.String("request_metadata.action_mnemonic", requestMetadata.ActionMnemonic),
attribute.String("request_metadata.configuration_id", requestMetadata.ConfigurationId),
attribute.String("request_metadata.correlated_invocations_id", requestMetadata.CorrelatedInvocationsId),
attribute.String("request_metadata.target_id", requestMetadata.TargetId),
attribute.String("request_metadata.tool_invocation_id", requestMetadata.ToolInvocationId))
if toolDetails := requestMetadata.ToolDetails; toolDetails != nil {
attributes = append(attributes,
attribute.String("request_metadata.tool_details.tool_name", toolDetails.ToolName),
attribute.String("request_metadata.tool_details.tool_version", toolDetails.ToolVersion))
}
span.SetAttributes(attributes...)
}