[Netfilter] Restart on invalid data via pubsub

data/Dockerfiles/netfilter/server.py

@@ -301,6 +301,7 @@ def watch():
   pubsub.subscribe('F2B_CHANNEL')
 
   while not quit_now:
+    try:
       for item in pubsub.listen():
         refreshF2bregex()
         for rule_id, rule_regex in f2bregex.items():
@@ -316,6 +317,8 @@ def watch():
                 continue
               logWarn('%s matched rule id %s (%s)' % (addr, rule_id, item['data']))
               ban(addr)
+    except Exception as ex:
+      logWarn('Could not read logline from pubsub, skipping...')
 
 def snat4(snat_target):
   global lock