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intake.go
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intake.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 tracegen contains functions that generate a trace including transaction,
// span, error, and logs using elastic APM Go agent and opentelemtry-go
package tracegen
import (
"context"
"crypto/tls"
"errors"
"fmt"
"net/url"
"time"
"go.elastic.co/apm/v2"
"go.elastic.co/apm/v2/transport"
)
// SendIntakeV2Trace generate a trace including a transaction, a span and an error
func SendIntakeV2Trace(ctx context.Context, cfg Config) (apm.TraceContext, EventStats, error) {
if err := cfg.validate(); err != nil {
return apm.TraceContext{}, EventStats{}, err
}
tracer, err := newTracer(cfg)
if err != nil {
return apm.TraceContext{}, EventStats{}, fmt.Errorf("failed to create tracer: %w", err)
}
defer tracer.Close()
// set sample rate
ts := apm.NewTraceState(apm.TraceStateEntry{
Key: "es", Value: fmt.Sprintf("s:%.4g", cfg.sampleRate),
})
traceContext := apm.TraceContext{
Trace: cfg.traceID,
Options: apm.TraceOptions(0).WithRecorded(true),
State: ts,
}
tx := tracer.StartTransactionOptions("parent-tx", "apmtool", apm.TransactionOptions{
TraceContext: traceContext,
})
span := tx.StartSpanOptions("parent-span", "apmtool", apm.SpanOptions{
Parent: tx.TraceContext(),
})
exit := tx.StartSpanOptions("exit-span", "apmtool", apm.SpanOptions{
Parent: span.TraceContext(),
ExitSpan: true,
})
exit.Context.SetServiceTarget(apm.ServiceTargetSpanContext{
Type: "service_type",
Name: "service_name",
})
exit.Duration = 999 * time.Millisecond
exit.Outcome = "failure"
// error
e := tracer.NewError(errors.New("timeout"))
e.Culprit = "timeout"
e.SetSpan(exit)
e.Send()
exit.End()
span.Duration = time.Second
span.Outcome = "success"
span.End()
tx.Duration = 2 * time.Second
tx.Outcome = "success"
tx.End()
tracer.Flush(ctx.Done())
tracerStats := tracer.Stats()
stats := EventStats{
ExceptionsSent: int(tracerStats.ErrorsSent),
SpansSent: int(tracerStats.SpansSent + tracerStats.TransactionsSent),
}
return tx.TraceContext(), stats, nil
}
func newTracer(cfg Config) (*apm.Tracer, error) {
apmServerURL, err := url.Parse(cfg.apmServerURL)
if err != nil {
return nil, fmt.Errorf("failed to parse endpoint: %w", err)
}
var apmServerTLSConfig *tls.Config
if cfg.insecure {
apmServerTLSConfig = &tls.Config{InsecureSkipVerify: true}
}
apmTransport, err := transport.NewHTTPTransport(transport.HTTPTransportOptions{
ServerURLs: []*url.URL{apmServerURL},
APIKey: cfg.apiKey,
UserAgent: "apm-tool",
TLSClientConfig: apmServerTLSConfig,
})
if err != nil {
return nil, fmt.Errorf("failed to create APM transport: %w", err)
}
return apm.NewTracerOptions(apm.TracerOptions{
ServiceName: cfg.apmServiceName,
ServiceVersion: "0.0.1",
Transport: apmTransport,
})
}