fix event consumers

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

services/search/pkg/config/defaults/defaultconfig.go

@@ -58,6 +58,7 @@ func DefaultConfig() *config.Config {
 			Cluster:          "opencloud-cluster",
 			DebounceDuration: 1000,
 			AsyncUploads:     true,
+			NumConsumers:     1,
 			EnableTLS:        false,
 			MaxAckPending:    1000,
 			AckWait:          1 * time.Minute,

services/search/pkg/config/search.go

@@ -8,7 +8,7 @@ type Events struct {
 	Endpoint         string `yaml:"endpoint" env:"OC_EVENTS_ENDPOINT;SEARCH_EVENTS_ENDPOINT" desc:"The address of the event system. The event system is the message queuing service. It is used as message broker for the microservice architecture." introductionVersion:"1.0.0"`
 	Cluster          string `yaml:"cluster" env:"OC_EVENTS_CLUSTER;SEARCH_EVENTS_CLUSTER" desc:"The clusterID of the event system. The event system is the message queuing service. It is used as message broker for the microservice architecture. Mandatory when using NATS as event system." introductionVersion:"1.0.0"`
 	AsyncUploads     bool   `yaml:"async_uploads" env:"OC_ASYNC_UPLOADS;SEARCH_EVENTS_ASYNC_UPLOADS" desc:"Enable asynchronous file uploads." introductionVersion:"1.0.0"`
-	NumConsumers     int    `yaml:"num_consumers" env:"SEARCH_EVENTS_NUM_CONSUMERS" desc:"The amount of concurrent event consumers to start. Event consumers are used for searching files. Multiple consumers increase parallelisation, but will also increase CPU and memory demands. The default value is 0." introductionVersion:"1.0.0"`
+	NumConsumers     int    `yaml:"num_consumers" env:"SEARCH_EVENTS_NUM_CONSUMERS" desc:"The amount of concurrent event consumers to start. Event consumers are used for searching files. Multiple consumers increase parallelisation, but will also increase CPU and memory demands." introductionVersion:"1.0.0"`
 	DebounceDuration int    `yaml:"debounce_duration" env:"SEARCH_EVENTS_REINDEX_DEBOUNCE_DURATION" desc:"The duration in milliseconds the reindex debouncer waits before triggering a reindex of a space that was modified." introductionVersion:"1.0.0"`
 
 	TLSInsecure          bool   `yaml:"tls_insecure" env:"OC_INSECURE;SEARCH_EVENTS_TLS_INSECURE" desc:"Whether to verify the server TLS certificates." introductionVersion:"1.0.0"`

services/search/pkg/service/event/service.go

@@ -95,6 +95,12 @@ func (s Service) Run() error {
 	ctx, cancel := context.WithCancel(s.ctx)
 	defer cancel()
 
+	s.log.Debug().Int("worker.count", s.numConsumers).
+		Str("messaging.consumer.group.name", "search-pull").
+		Str("messaging.system", "nats").
+		Str("messaging.operation.name", "receive").
+		Msg("starting event processing workers")
+
 	// start workers
 	for i := 0; i < s.numConsumers; i++ {
 		wg.Add(1)
@@ -152,7 +158,7 @@ func getSpaceID(ref *provider.Reference) *provider.StorageSpaceId {
 
 func (s Service) processEvent(e raw.Event) error {
 	ctx := e.GetTraceContext(s.ctx)
-	ctx, span := tracer.Start(ctx, "processEvent")
+	_, span := tracer.Start(ctx, "processEvent")
 	defer span.End()
 
 	e.InProgress() // let nats know that we are processing this event