go get github.com/uptrace/uptrace-go

package main

import (
    "context"
    "errors"
    "fmt"

    "github.com/uptrace/uptrace-go/uptrace"
    "go.opentelemetry.io/otel"
    "go.opentelemetry.io/otel/label"
)

func main() {
    ctx := context.Background()

    upclient := uptrace.NewClient(&uptrace.Config{
        DSN: "<COPY DSN HERE>",

        ServiceName:    "myservice",
        ServiceVersion: "v1.0.0",
    })

    defer upclient.Close()
    defer upclient.ReportPanic(ctx)

    tracer := otel.Tracer("app_or_package_name", "1.0.0")

    ctx, span := tracer.Start(ctx, "main span")

    _, child1 := tracer.Start(ctx, "child1")
    child1.SetAttributes(label.String("key1", "value1"))
    child1.RecordError(errors.New("error1"))
    child1.End()

    _, child2 := tracer.Start(ctx, "child2")
    child2.SetAttributes(label.Int("key2", 42), label.Float64("key3", 123.456))
    child2.End()

    span.End()
    fmt.Printf("trace: %s\n", upclient.TraceURL(span))
}