cms_net: Add wolmatch_ensure function to call wolmatch in a loop

_runners/cms_net.py

@@ -6,6 +6,7 @@ Network tools to run from the Master, specific to the Claremont MakerSpace
 import logging
 import socket
 import netifaces
+import time
 
 import salt.utils.network
 
@@ -40,3 +41,10 @@ def wolmatch(tgt, destport=9):
             log.info('Waking up %s', mac)
             ret.append(f"{name}: {mac}")
     return ret
+
+def wolmatch_ensure(tgt, destport=9):
+    'Ensure matched minions are online, and stay online'
+    while True:
+        log.info('Waking up minions')
+        wolmatch(tgt, destport)
+        time.sleep(5)