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otlp_init.go
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otlp_init.go
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// SPDX-License-Identifier: MIT OR Apache-2.0
package outputs
import (
"context"
"fmt"
"log"
"os"
"strings"
"github.com/falcosecurity/falcosidekick/types"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
otelresource "go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.23.1"
)
const (
OTLPinstrumentationName = "falco"
OTLPinstrumentationVersion = "v0.1.0"
)
func newResource() *otelresource.Resource {
return otelresource.NewWithAttributes(
semconv.SchemaURL,
semconv.ServiceName(OTLPinstrumentationName),
semconv.ServiceVersion(OTLPinstrumentationVersion),
)
}
func installExportPipeline(config *types.Configuration, ctx context.Context) (func(context.Context) error, error) {
var client otlptrace.Client
switch config.OTLP.Traces.CheckCert {
case true:
client = otlptracehttp.NewClient()
case false:
client = otlptracehttp.NewClient(otlptracehttp.WithInsecure())
}
exporter, err := otlptrace.New(ctx, client)
if err != nil {
return nil, fmt.Errorf("creating OTLP trace exporter: %w", err)
}
withBatcher := sdktrace.WithBatcher(exporter)
if config.OTLP.Traces.Synced {
withBatcher = sdktrace.WithSyncer(exporter)
}
tracerProvider := sdktrace.NewTracerProvider(
sdktrace.WithResource(newResource()),
withBatcher,
)
otel.SetTracerProvider(tracerProvider)
return tracerProvider.Shutdown, nil
}
func otlpInit(config *types.Configuration) (func(), error) {
// As config.OTLP.Traces fields may have been set by our own config (e.g. YAML),
// we need to set SDK environment variables accordingly.
os.Setenv("OTEL_EXPORTER_OTLP_TRACES_ENDPOINT", strings.TrimSpace(config.OTLP.Traces.Endpoint))
if config.OTLP.Traces.Protocol != "" {
os.Setenv("OTEL_EXPORTER_OTLP_TRACES_PROTOCOL", strings.TrimSpace(config.OTLP.Traces.Protocol))
}
if config.OTLP.Traces.Headers != "" {
os.Setenv("OTEL_EXPORTER_OTLP_TRACES_HEADERS", strings.TrimSpace(config.OTLP.Traces.Headers))
}
if config.OTLP.Traces.Timeout != 0 {
os.Setenv("OTEL_EXPORTER_OTLP_TRACES_TIMEOUT", fmt.Sprintf("%d", config.OTLP.Traces.Timeout))
}
if len(config.OTLP.Traces.ExtraEnvVars) != 0 {
for i, j := range config.OTLP.Traces.ExtraEnvVars {
os.Setenv(i, j)
}
}
ctx := context.Background()
// Registers a tracer Provider globally.
shutdown, err := installExportPipeline(config, ctx)
if err != nil {
return nil, err
}
shutDownCallback := func() {
if err := shutdown(ctx); err != nil {
log.Printf("[ERROR] : OLTP Traces - Error: %v\n", err)
}
}
return shutDownCallback, nil
}