[WORKER] Added a gearman-poll argument

Fixes: bug #1193482

Change-Id: Ic5fc3730fba92bc6f500f0f17b78a472f5440ee5

doc/worker/config.rst

@@ -59,6 +59,11 @@ Command Line Options
       The number of seconds to sleep between statistics polling of the
       load balancer driver. Default is 300 seconds.
 
+   .. option:: --gearman-poll <SECONDS>
+
+      The number of seconds gearman will poll before re-shuffling its 
+      connections. Default is 60 seconds.
+      
    .. option:: --syslog
 
       Send log events to syslog.

etc/sample_libra.cfg

@@ -29,6 +29,7 @@ group = libra
 driver = haproxy
 reconnect_sleep = 60
 stats_poll = 300
+gearman_poll = 60
 server = 10.0.0.1:8080 10.0.0.2:8080
 pid = /var/run/libra/libra_worker.pid
 logfile = /var/log/libra/libra_worker.log

libra/worker/main.py

@@ -101,6 +101,11 @@ def main():
         '--stats-poll', dest='stats_poll', type=int, metavar='TIME',
         default=300, help='statistics polling interval in seconds'
     )
+    options.parser.add_argument(
+        '--gearman-poll',
+        dest='gearman_poll', type=int, metavar='TIME',
+        default=60, help='Gearman worker polling timeout'
+    )
     args = options.run()
 
     if not args.server:

libra/worker/worker.py

@@ -85,7 +85,7 @@ def config_thread(logger, driver, args):
 
     while (retry):
         try:
-            worker.work()
+            worker.work(args.gearman_poll)
         except KeyboardInterrupt:
             retry = False
         except gearman.errors.ServerUnavailable: