Ensure that the script handles cases where the PID file exists but is empty or does not contain the expected data structure.

Change-Id: I4301a6cbea0688369c735d4751c741106b3fe7ab

nova/Chart.yaml

@@ -14,7 +14,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Nova
 name: nova
-version: 0.3.14
+version: 0.3.15
 home: https://docs.openstack.org/nova/latest/
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/Nova/OpenStack_Project_Nova_vertical.png
 sources:

nova/templates/bin/_health-probe.py.tpl

@@ -243,13 +243,16 @@ if __name__ == "__main__":
     data = {}
     if os.path.isfile(pidfile):
         with open(pidfile,'r') as f:
-            data = json.load(f)
-        if check_pid_running(data['pid']):
-            if data['exit_count'] > 1:
+            file_content = f.read().strip()
+            if file_content:
+                data = json.loads(file_content)
+
+    if 'pid' in data and check_pid_running(data['pid']):
+        if 'exit_count' in data and data['exit_count'] > 1:
             # Third time in, kill the previous process
             os.kill(int(data['pid']), signal.SIGTERM)
         else:
-                data['exit_count'] = data['exit_count'] + 1
+            data['exit_count'] = data.get('exit_count', 0) + 1
             with open(pidfile, 'w') as f:
                 json.dump(data, f)
             sys.exit(0)

releasenotes/notes/nova.yaml

@@ -83,4 +83,5 @@ nova:
   - 0.3.12 Update oslo_messaging_RPCClient
   - 0.3.13 Add Zed overrides
   - 0.3.14 Add 2023.1 overrides
+  - 0.3.15 Ensure that the health check script handles cases where the PID file exists but is empty or does not contain the expected data structure.
 ...