go/opentelemetry-go
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Revert "Collector example: add metrics and use official port (#4466)" (#4487)

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This reverts commit 6eedabf874.
This commit is contained in:
Tyler Yahn
2023-09-09 07:52:17 -07:00
committed by GitHub
parent 9737995cdb
commit e44ea5cc7f
2 changed files with 21 additions and 92 deletions
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102
example/otel-collector/main.go
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@@ -30,44 +30,17 @@ import (
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/propagation"
sdkmetric "go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
"go.opentelemetry.io/otel/trace"
)
// Initialize a gRPC connection to be used by both the tracer and meter
// providers.
func initConn() (*grpc.ClientConn, error) {
ctx := context.Background()
// If the OpenTelemetry Collector is running on a local cluster (minikube or
// microk8s), it should be accessible through the NodePort service at the
// `localhost:4317` endpoint. Otherwise, replace `localhost` with the
// endpoint of your cluster. If you run the app inside k8s, then you can
// probably connect directly to the service through dns.
ctx, cancel := context.WithTimeout(ctx, time.Second)
defer cancel()
conn, err := grpc.DialContext(ctx, "localhost:4317",
// Note the use of insecure transport here. TLS is recommended in production.
grpc.WithTransportCredentials(insecure.NewCredentials()),
grpc.WithBlock(),
)
if err != nil {
return nil, fmt.Errorf("failed to create gRPC connection to collector: %w", err)
}
return conn, err
}
// Initializes an OTLP exporter, and configures the corresponding trace
// provider.
func initTracerProvider(conn *grpc.ClientConn) (func(context.Context) error, error) {
// Initializes an OTLP exporter, and configures the corresponding trace and
// metric providers.
func initProvider() (func(context.Context) error, error) {
ctx := context.Background()
res, err := resource.New(ctx,
@@ -80,6 +53,22 @@ func initTracerProvider(conn *grpc.ClientConn) (func(context.Context) error, err
return nil, fmt.Errorf("failed to create resource: %w", err)
}
// If the OpenTelemetry Collector is running on a local cluster (minikube or
// microk8s), it should be accessible through the NodePort service at the
// `localhost:30080` endpoint. Otherwise, replace `localhost` with the
// endpoint of your cluster. If you run the app inside k8s, then you can
// probably connect directly to the service through dns.
ctx, cancel := context.WithTimeout(ctx, time.Second)
defer cancel()
conn, err := grpc.DialContext(ctx, "localhost:30080",
// Note the use of insecure transport here. TLS is recommended in production.
grpc.WithTransportCredentials(insecure.NewCredentials()),
grpc.WithBlock(),
)
if err != nil {
return nil, fmt.Errorf("failed to create gRPC connection to collector: %w", err)
}
// Set up a trace exporter
traceExporter, err := otlptracegrpc.New(ctx, otlptracegrpc.WithGRPCConn(conn))
if err != nil {
@@ -103,47 +92,13 @@ func initTracerProvider(conn *grpc.ClientConn) (func(context.Context) error, err
return tracerProvider.Shutdown, nil
}
// Initializes an OTLP exporter, and configures the corresponding meter
// provider.
func initMeterProvider(conn *grpc.ClientConn) (func(context.Context) error, error) {
ctx := context.Background()
res, err := resource.New(ctx,
resource.WithAttributes(
// the service name used to display traces in backends
semconv.ServiceName("test-service"),
),
)
if err != nil {
return nil, fmt.Errorf("failed to create resource: %w", err)
}
metricExporter, err := otlpmetricgrpc.New(ctx, otlpmetricgrpc.WithGRPCConn(conn))
if err != nil {
return nil, fmt.Errorf("failed to create metrics exporter: %w", err)
}
meterProvider := sdkmetric.NewMeterProvider(
sdkmetric.WithReader(sdkmetric.NewPeriodicReader(metricExporter)),
sdkmetric.WithResource(res),
)
otel.SetMeterProvider(meterProvider)
return meterProvider.Shutdown, nil
}
func main() {
log.Printf("Waiting for connection...")
ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
defer cancel()
conn, err := initConn()
if err != nil {
log.Fatal(err)
}
shutdown, err := initTracerProvider(conn)
shutdown, err := initProvider()
if err != nil {
log.Fatal(err)
}
@@ -153,18 +108,7 @@ func main() {
}
}()
shutdown, err = initMeterProvider(conn)
if err != nil {
log.Fatal(err)
}
defer func() {
if err := shutdown(ctx); err != nil {
log.Fatal("failed to shutdown MeterProvider: %w", err)
}
}()
tracer := otel.Tracer("test-tracer")
meter := otel.Meter("test-meter")
// Attributes represent additional key-value descriptors that can be bound
// to a metric observer or recorder.
@@ -174,11 +118,6 @@ func main() {
attribute.String("attrC", "vanilla"),
}
runCount, err := meter.Int64Counter("run", metric.WithDescription("The number of times the iteration ran"))
if err != nil {
log.Fatal(err)
}
// work begins
ctx, span := tracer.Start(
ctx,
@@ -187,7 +126,6 @@ func main() {
defer span.End()
for i := 0; i < 10; i++ {
_, iSpan := tracer.Start(ctx, fmt.Sprintf("Sample-%d", i))
runCount.Add(ctx, 1, metric.WithAttributes(commonAttrs...))
log.Printf("Doing really hard work (%d / 10)\n", i+1)
<-time.After(time.Second)