Add missing DatabasesReady event to DB proxy (#10152)

* Add missing DatabasesReady

* Expect TeleportReadyEvent to be emitted when DB proxy run in tests.

integration/helpers.go

@@ -838,6 +838,8 @@ func (i *TeleInstance) StartDatabase(conf *service.Config) (*service.TeleportPro
 	conf.UploadEventsC = i.UploadEventsC
 	conf.Auth.Enabled = false
 	conf.Proxy.Enabled = false
+	conf.Apps.Enabled = false
+	conf.SSH.Enabled = false
 
 	// Create a new Teleport process and add it to the list of nodes that
 	// compose this "cluster".
@@ -852,6 +854,7 @@ func (i *TeleInstance) StartDatabase(conf *service.Config) (*service.TeleportPro
 	expectedEvents := []string{
 		service.DatabasesIdentityEvent,
 		service.DatabasesReady,
+		service.TeleportReadyEvent,
 	}
 
 	// Start the process and block until the expected events have arrived.
@@ -1110,6 +1113,9 @@ func (i *TeleInstance) Start() error {
 	if i.Config.Apps.Enabled {
 		expectedEvents = append(expectedEvents, service.AppsReady)
 	}
+	if i.Config.Databases.Enabled {
+		expectedEvents = append(expectedEvents, service.DatabasesReady)
+	}
 
 	// Start the process and block until the expected events have arrived.
 	receivedEvents, err := startAndWait(i.Process, expectedEvents)

lib/service/service.go

@@ -765,6 +765,9 @@ func NewTeleport(cfg *Config) (*TeleportProcess, error) {
 	if cfg.Apps.Enabled {
 		eventMapping.In = append(eventMapping.In, AppsReady)
 	}
+	if cfg.Databases.Enabled {
+		eventMapping.In = append(eventMapping.In, DatabasesReady)
+	}
 	if cfg.Metrics.Enabled {
 		eventMapping.In = append(eventMapping.In, MetricsReady)
 	}