Fleezesd
97 lines
2.7 KiB
Go
97 lines
2.7 KiB
Go
package main
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import (
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"context"
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"log/slog"
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"net/http"
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"os"
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"time"
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"github.com/gin-gonic/gin"
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slogformatter "github.com/samber/slog-formatter"
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sloggin "github.com/samber/slog-gin"
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"go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/propagation"
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"go.opentelemetry.io/otel/sdk/resource"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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)
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func initTracerProvider() (*sdktrace.TracerProvider, error) {
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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resource, err := resource.New(ctx, resource.WithAttributes(
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attribute.String("service.name", "example"),
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attribute.String("service.namespace", "default"),
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))
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if err != nil {
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return nil, err
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}
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// tracer provider
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tp := sdktrace.NewTracerProvider(
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sdktrace.WithSampler(sdktrace.AlwaysSample()),
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sdktrace.WithResource(resource),
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)
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otel.SetTracerProvider(tp)
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// Set up a text map propagator
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otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}))
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return tp, nil
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}
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func main() {
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tp, _ := initTracerProvider()
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defer tp.Shutdown(context.Background())
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// Create a slog logger, which:
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// - Logs to stdout.
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// - RFC3339 with UTC time format.
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logger := slog.New(
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slogformatter.NewFormatterHandler(
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slogformatter.TimezoneConverter(time.UTC),
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slogformatter.TimeFormatter(time.RFC3339, nil),
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)(
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slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{}),
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),
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)
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// Add an attribute to all log entries made through this logger.
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logger = logger.With("gin_mode", gin.EnvGinMode)
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router := gin.New()
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router.Use(otelgin.Middleware("example"))
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// Add the sloggin middleware to all routes.
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// The middleware will log all requests attributes under a "http" group.
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//router.Use(sloggin.New(logger))
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config := sloggin.Config{
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WithRequestID: true,
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WithSpanID: true,
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WithTraceID: true,
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}
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router.Use(sloggin.NewWithConfig(logger, config))
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router.Use(gin.Recovery())
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// Example pong request.
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router.GET("/pong", func(c *gin.Context) {
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sloggin.AddCustomAttributes(c, slog.String("foo", "bar"))
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c.String(http.StatusOK, "pong")
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})
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router.GET("/pong/:id", func(c *gin.Context) {
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c.String(http.StatusOK, "pong")
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})
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logger.Info("Starting server")
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if err := router.Run(":4242"); err != nil {
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logger.Error("can' start server with 4242 port")
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}
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// output:
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// time=2023-04-10T14:00:0.000000+00:00 level=ERROR msg="Incoming request" gin_mode=GIN_MODE http.status=200 http.method=GET http.path=/pong http.ip=127.0.0.1 http.latency=25.5µs http.user-agent=curl/7.77.0 http.time=2023-04-10T14:00:00.000+00:00
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}
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