Add index api for monitoring if Gunicorn is down

Changelog.md

@@ -1,6 +1,9 @@
 # CHANGELOG
 All notable changes to this project will be documented here.
 
+## [unreleased]
+- Add index api for monitoring if Gunicorn is down (#555)
+
 ## [v2.5.1]
 - Ensure all Haskell test cases still run within same file when there are failed test cases (#543)
 

client/autotest_client/__init__.py

@@ -319,3 +319,8 @@ def cancel_tests(settings_id, **_kw):
     for id_, job in zip(test_ids, _get_jobs(test_ids, settings_id)):
         result[id_] = job if job is None else job.cancel()
     return jsonify(success=True)
+
+
+@app.route("/index", methods=["GET"])
+def index():
+    return jsonify(success=True)

client/autotest_client/tests/test_flask_app.py

@@ -38,3 +38,13 @@ def test_api_key_set(self, response):
 
     def test_credentials_set(self, response, fake_redis_conn, credentials):
         assert json.loads(fake_redis_conn.hget("autotest:user_credentials", response.json["api_key"])) == credentials
+
+
+class TestIndex:
+
+    @pytest.fixture
+    def response(self, client):
+        return client.get("/index")
+
+    def test_index(self, response):
+        assert response.status_code == 200