Add tracing to eventhistory service.

This adds tracing to the event history service.

services/eventhistory/pkg/server/grpc/option.go

@@ -9,6 +9,7 @@ import (
 	"github.com/owncloud/ocis/v2/services/eventhistory/pkg/metrics"
 	"github.com/urfave/cli/v2"
 	"go-micro.dev/v4/store"
+	"go.opentelemetry.io/otel/trace"
 )
 
 // Option defines a single option function.
@@ -16,16 +17,17 @@ type Option func(o *Options)
 
 // Options defines the available options for this package.
 type Options struct {
-	Name        string
-	Address     string
-	Logger      log.Logger
-	Context     context.Context
-	Config      *config.Config
-	Metrics     *metrics.Metrics
-	Namespace   string
-	Flags       []cli.Flag
-	Persistence store.Store
-	Consumer    events.Consumer
+	Name          string
+	Address       string
+	Logger        log.Logger
+	Context       context.Context
+	Config        *config.Config
+	Metrics       *metrics.Metrics
+	Namespace     string
+	Flags         []cli.Flag
+	Persistence   store.Store
+	Consumer      events.Consumer
+	TraceProvider trace.TracerProvider
 }
 
 // newOptions initializes the available default options.
@@ -108,3 +110,10 @@ func Consumer(consumer events.Consumer) Option {
 		o.Consumer = consumer
 	}
 }
+
+// TraceProvider provides a function to configure the trace provider
+func TraceProvider(traceProvider trace.TracerProvider) Option {
+	return func(o *Options) {
+		o.TraceProvider = traceProvider
+	}
+}

services/eventhistory/pkg/server/grpc/server.go

@@ -25,6 +25,7 @@ func NewService(opts ...Option) grpc.Service {
 		grpc.Context(options.Context),
 		grpc.Flags(options.Flags...),
 		grpc.Version(version.GetString()),
+		grpc.TraceProvider(options.TraceProvider),
 	)
 	if err != nil {
 		options.Logger.Fatal().Err(err).Msg("Error creating event history service")