fix(helm): preserve the requested database volume size

k8s-cluster/ha-cluster/helm_charts/templates/statefulset.yaml

@@ -161,13 +161,6 @@ spec:
       resources:
         requests:
           storage: {{ .Values.pvc.storageSize }}
-    spec:
-      storageClassName: {{ .Values.pvc.storageClassName }}
-      accessModes:
-      - {{ .Values.pvc.accessModes }}
-      resources:
-        requests:
-          storage: {{ .Values.pvc.confStorageSize }}
 
   - metadata:
       labels:

tests/test_helm_storage.py

@@ -0,0 +1,34 @@
+"""Render regression tests. Requires Helm 3 and PyYAML (pip install pyyaml)."""
+import json
+import os
+from pathlib import Path
+import subprocess
+import unittest
+
+CHART = Path(__file__).resolve().parents[1] / 'k8s-cluster/ha-cluster/helm_charts'
+
+def render(overrides=None):
+    command = [os.environ.get('HELM', 'helm'), 'template', 'test', str(CHART)]
+    if overrides:
+        command += ['--values', '-']
+    result = subprocess.run(command, input=json.dumps(overrides or {}),
+                            text=True, encoding='utf-8', capture_output=True, check=True)
+    import yaml
+    return list(yaml.safe_load_all(result.stdout))
+
+def statefulset(documents):
+    return next(doc for doc in documents if doc and doc['kind'] == 'StatefulSet')
+
+class StorageTest(unittest.TestCase):
+    def test_independent_claim_sizes(self):
+        for overrides, data_size, config_size in [
+            ({}, '1Gi', '16Mi'),
+            ({'pvc': {'storageSize': '32Gi', 'confStorageSize': '64Mi'}}, '32Gi', '64Mi'),
+        ]:
+            with self.subTest(overrides=overrides):
+                claims = statefulset(render(overrides))['spec']['volumeClaimTemplates']
+                sizes = {c['metadata']['name']: c['spec']['resources']['requests']['storage'] for c in claims}
+                self.assertEqual(sizes, {'pgdata': data_size, 'ivyhac-config': config_size})
+
+if __name__ == '__main__':
+    unittest.main()