1 files changed, 12 insertions, 0 deletions
diff --git a/src/mongo/db/repl/primary_only_service.cpp b/src/mongo/db/repl/primary_only_service.cpp
index acf79190d1b..ab7f25ec861 100644
--- a/src/mongo/db/repl/primary_only_service.cpp
+++ b/src/mongo/db/repl/primary_only_service.cpp
@@ -227,9 +227,21 @@ void PrimaryOnlyServiceRegistry::onStepDown() {
     }
 }
 
+void PrimaryOnlyServiceRegistry::reportServiceInfo(BSONObjBuilder* result) {
+    BSONObjBuilder subBuilder(result->subobjStart("primaryOnlyServices"));
+    for (auto& service : _servicesByName) {
+        subBuilder.appendNumber(service.first, service.second->getNumberOfInstances());
+    }
+}
+
 PrimaryOnlyService::PrimaryOnlyService(ServiceContext* serviceContext)
     : _serviceContext(serviceContext) {}
 
+size_t PrimaryOnlyService::getNumberOfInstances() {
+    stdx::lock_guard lk(_mutex);
+    return _instances.size();
+}
+
 bool PrimaryOnlyService::isRunning() const {
     stdx::lock_guard lk(_mutex);
     return _state == State::kRunning;