/
main.go
107 lines (96 loc) · 2.84 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
// Copyright OpenTelemetry Authors
// Copyright Splunk, Inc.
//
// 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 main
import (
"context"
"crypto/rand"
"log"
"math/big"
"os"
"os/signal"
"syscall"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.7.0"
"go.opentelemetry.io/otel/trace"
)
type MyErrorHandler struct {
}
func (m *MyErrorHandler) Handle(err error) {
log.Fatal(err)
}
func main() {
ctx := context.Background()
res, err := resource.New(ctx,
resource.WithAttributes(
// the service name used to display traces in backends
semconv.ServiceNameKey.String("test-service"),
),
)
if err != nil {
log.Fatalf("Error creating resource: %v", err)
}
// Set up a trace exporter
traceExporter, err := otlptracegrpc.New(ctx,
otlptracegrpc.WithInsecure(),
otlptracegrpc.WithEndpoint("otelcollector:4317"),
)
if err != nil {
log.Fatalf("Error creating trace exporter: %v", err)
}
bsp := sdktrace.NewBatchSpanProcessor(traceExporter)
tracerProvider := sdktrace.NewTracerProvider(
sdktrace.WithSampler(sdktrace.AlwaysSample()),
sdktrace.WithResource(res),
sdktrace.WithSpanProcessor(bsp),
)
otel.SetErrorHandler(&MyErrorHandler{})
otel.SetTracerProvider(tracerProvider)
// set global propagator to tracecontext (the default is no-op).
otel.SetTextMapPropagator(propagation.TraceContext{})
log.Println("Start tracing app")
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT)
go func() {
<-c
os.Exit(0)
}()
tracer := otel.Tracer("test-tracer")
commonLabels := []attribute.KeyValue{
attribute.String("request", "get"),
attribute.String("response", "query"),
attribute.String("company", "splunk"),
}
numberOfRuns := int64(0)
for {
// work begins
numberOfRuns++
_, span := tracer.Start(
context.Background(),
"work",
trace.WithAttributes(commonLabels...))
log.Printf("Executing run %d\n", numberOfRuns)
nBig, _ := rand.Int(rand.Reader, big.NewInt(3))
i := nBig.Int64() * numberOfRuns % 30
time.Sleep(time.Duration(i) * time.Second)
span.End()
tracerProvider.ForceFlush(context.Background())
}
}