add openapi specification for http server

openapi.yml

@@ -0,0 +1,29 @@
+openapi: "3.0.2"
+info:
+  title: API Title
+  version: "1.0"
+servers:
+  - url: https://localhost:8000/v1
+paths:
+  /health:
+    get:
+      responses:
+        "200":
+          description: OK
+          content:
+            "application/json":
+              schema:
+                type: object
+                properties:
+                  healthy:
+                    type: boolean
+                  good:
+                    type: array
+                    items:
+                      type: string
+                      example: "Heartbeat"
+                  bad:
+                    type: array
+                    items:
+                      type: string
+                      example: "ResourceManager"

src/Http.cpp

@@ -160,6 +160,8 @@ void Http::Server::THttpServerInstance::operator()() try {
     HttpLibServerInstance->Get(API_V1 "/health", [](const httplib::Request&, httplib::Response& res) {
         size_t SystemsGood = 0;
         size_t SystemsBad = 0;
+        json Good = json::array();
+        json Bad = json::array();
         auto Statuses = Application::GetSubsystemStatuses();
         for (const auto& NameStatusPair : Statuses) {
             switch (NameStatusPair.second) {
@@ -167,16 +169,20 @@ void Http::Server::THttpServerInstance::operator()() try {
             case Application::Status::ShuttingDown:
             case Application::Status::Shutdown:
             case Application::Status::Good:
+                Good.push_back(NameStatusPair.first);
                 SystemsGood++;
                 break;
             case Application::Status::Bad:
+                Bad.push_back(NameStatusPair.first);
                 SystemsBad++;
                 break;
             }
         }
         res.set_content(
             json {
-                { "ok", SystemsBad == 0 },
+                { "healthy", SystemsBad == 0 },
+                { "good", Good },
+                { "bad", Bad },
             }
                 .dump(),
             "application/json");