[mux] Exit to write standby state to active-active ports (#11821)

[mux] Exit to write standby state to `active-active` ports

Signed-off-by: Longxiang Lyu <[email protected]>

files/build_templates/mux.service.j2

@@ -14,7 +14,7 @@ ExecStartPre=/usr/local/bin/mark_dhcp_packet.py
 ExecStartPre=/usr/bin/{{docker_container_name}}.sh start
 ExecStart=/usr/bin/{{docker_container_name}}.sh wait
 ExecStop=/usr/bin/{{docker_container_name}}.sh stop
-ExecStopPost=/usr/local/bin/write_standby.py
+ExecStopPost=/usr/local/bin/write_standby.py --shutdown mux
 Restart=always
 RestartSec=30
 

files/scripts/write_standby.py

@@ -178,6 +178,12 @@ def apply_mux_config(self):
     parser.add_argument('-s', '--active_standby',
                         help='state: intial state for "auto" and/or "manual" config in active-standby mode, default "standby"',
                         type=str, required=False, default='standby')
+    parser.add_argument('--shutdown', help='write mux state after shutdown other services, supported: mux',
+                        type=str, required=False, choices=['mux'])
     args = parser.parse_args()
-    mux_writer = MuxStateWriter(activeactive=args.active_active, activestandby=args.active_standby)
+    active_active_state = args.active_active
+    active_standby_state = args.active_standby
+    if args.shutdown == 'mux':
+        active_active_state = "standby"
+    mux_writer = MuxStateWriter(activeactive=active_active_state, activestandby=active_standby_state)
     mux_writer.apply_mux_config()