forked from open-telemetry/opentelemetry-go-contrib
/
aws.go
133 lines (110 loc) · 4.43 KB
/
aws.go
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelaws
import (
"context"
"time"
v2Middleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
semconv "go.opentelemetry.io/otel/semconv/v1.7.0"
"go.opentelemetry.io/otel/trace"
)
const (
tracerName = "go.opentelemetry.io/contrib/instrumentation/github.com/aws/aws-sdk-go-v2/otelaws"
)
type spanTimestampKey struct{}
type AttributeSetter func(context.Context, middleware.InitializeInput) []attribute.KeyValue
type otelMiddlewares struct {
tracer trace.Tracer
attributesetter AttributeSetter
}
func (m otelMiddlewares) initializeMiddlewareBefore(stack *middleware.Stack) error {
return stack.Initialize.Add(middleware.InitializeMiddlewareFunc("OTelInitializeMiddlewareBefore", func(
ctx context.Context, in middleware.InitializeInput, next middleware.InitializeHandler) (
out middleware.InitializeOutput, metadata middleware.Metadata, err error) {
ctx = context.WithValue(ctx, spanTimestampKey{}, time.Now())
return next.HandleInitialize(ctx, in)
}),
middleware.Before)
}
func (m otelMiddlewares) initializeMiddlewareAfter(stack *middleware.Stack) error {
return stack.Initialize.Add(middleware.InitializeMiddlewareFunc("OTelInitializeMiddlewareAfter", func(
ctx context.Context, in middleware.InitializeInput, next middleware.InitializeHandler) (
out middleware.InitializeOutput, metadata middleware.Metadata, err error) {
serviceID := v2Middleware.GetServiceID(ctx)
attributes := []attribute.KeyValue{ServiceAttr(serviceID),
RegionAttr(v2Middleware.GetRegion(ctx)),
OperationAttr(v2Middleware.GetOperationName(ctx)),
}
if m.attributesetter != nil {
attributes = append(
attributes,
m.attributesetter(ctx, in)...,
)
}
ctx, span := m.tracer.Start(ctx, serviceID,
trace.WithTimestamp(ctx.Value(spanTimestampKey{}).(time.Time)),
trace.WithSpanKind(trace.SpanKindClient),
trace.WithAttributes(attributes...),
)
defer span.End()
out, metadata, err = next.HandleInitialize(ctx, in)
if err != nil {
span.RecordError(err)
span.SetStatus(codes.Error, err.Error())
}
return out, metadata, err
}),
middleware.After)
}
func (m otelMiddlewares) deserializeMiddleware(stack *middleware.Stack) error {
return stack.Deserialize.Add(middleware.DeserializeMiddlewareFunc("OTelDeserializeMiddleware", func(
ctx context.Context, in middleware.DeserializeInput, next middleware.DeserializeHandler) (
out middleware.DeserializeOutput, metadata middleware.Metadata, err error) {
out, metadata, err = next.HandleDeserialize(ctx, in)
resp, ok := out.RawResponse.(*smithyhttp.Response)
if !ok {
// No raw response to wrap with.
return out, metadata, err
}
span := trace.SpanFromContext(ctx)
span.SetAttributes(semconv.HTTPStatusCodeKey.Int(resp.StatusCode))
requestID, ok := v2Middleware.GetRequestIDMetadata(metadata)
if ok {
span.SetAttributes(RequestIDAttr(requestID))
}
return out, metadata, err
}),
middleware.Before)
}
// AppendMiddlewares attaches OTel middlewares to the AWS Go SDK V2 for instrumentation.
// OTel middlewares can be appended to either all aws clients or a specific operation.
// Please see more details in https://aws.github.io/aws-sdk-go-v2/docs/middleware/
func AppendMiddlewares(apiOptions *[]func(*middleware.Stack) error, opts ...Option) {
cfg := config{
TracerProvider: otel.GetTracerProvider(),
AttributeSetter: DefaultAttributeSetter,
}
for _, opt := range opts {
opt.apply(&cfg)
}
m := otelMiddlewares{tracer: cfg.TracerProvider.Tracer(tracerName,
trace.WithInstrumentationVersion(SemVersion())),
attributesetter: cfg.AttributeSetter}
*apiOptions = append(*apiOptions, m.initializeMiddlewareBefore, m.initializeMiddlewareAfter, m.deserializeMiddleware)
}