Added shutdown os command calls for different OS

Author: Hazardu

docker/scripts/nbl/ci/dev/lib/kazoo.py

@@ -62,6 +62,16 @@ def appendKazooAtomic(self, zNodePath, data):
                 pass
 
 
+def shutdownOs():
+    if os.name == 'nt' or os.name == 'java': # For windows and java (in the rare case of running jython)
+        return os.system('shutdown /s /f 0')
+    elif os.name == 'posix': # For Unix, Linux, Mac
+        return os.system('sudo shutdown -h now')
+    else:
+        print('Unknown operating system') # Docs for os.name listed only the above three cases
+        return 1
+
+
 def healthyCheck(host):
     try:
         with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
@@ -82,10 +92,8 @@ def healthyCheck(host):
         if shutdown:
             print("Requested shutdown...")
 
-            try:
-                subprocess.run(f"shutdown /s /f", check=True)
-            except subprocess.CalledProcessError as e:
-                print(f"Could not shutdown container because of: {e.stderr}")
+            if shutdownOs() != 0:
+                print(f"Could not shutdown container")
 
         return True
     except (socket.error, socket.timeout):