Add initial Grafana tests

Adds one tests that checks some basic Grafana statistics. Mostly to
check that we can access the API.

Author: markgoddard

requirements.txt

@@ -1,3 +1,4 @@
+grafana-client==4.1.*
 opensearch-py==2.5.*
 prometheus-api-client==0.5.*
 pytest-testinfra==10.1.*

stackhpc_openstack_tests/monitoring/test_grafana.py

@@ -0,0 +1,40 @@
+# Copyright (c) 2024 StackHPC Ltd.
+
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+# TODO: Check if we can validate that dashboards load correctly.
+
+from grafana_client import GrafanaApi
+import os
+import pytest
+
+
+@pytest.fixture
+def grafana() -> GrafanaApi:
+    """Pytest fixture that creates a Grafana API client."""
+    # https://github.com/grafana-toolbox/grafana-client
+    grafana_url = os.environ["GRAFANA_URL"]
+    grafana_username = os.environ["GRAFANA_USERNAME"]
+    grafana_password = os.environ["GRAFANA_PASSWORD"]
+    return GrafanaApi.from_url(
+        grafana_url,
+        credential=(grafana_username, grafana_password),
+    )
+
+
+def test_grafana_api_stats(grafana):
+    """Test that Grafana API stats are accessible."""
+    # https://grafana.com/docs/grafana/latest/developers/http_api/admin/#grafana-stats
+    result = grafana.admin.stats()
+    assert result["dashboards"] > 0
+    assert result["datasources"] > 0