Allow to change auditor sleep interval in config

Change-Id: Ic451c5e0b686509f8982ed1bf65a223a2d77b9a0

doc/source/deployment_guide.rst

@@ -719,6 +719,8 @@ log_facility                LOG_LOCAL0          Syslog log facility
 log_level                   INFO                Logging level
 log_address                 /dev/log            Logging directory
 log_time                    3600                Frequency of status logs in seconds.
+interval                    30                  Time in seconds to wait between
+                                                auditor passes
 disk_chunk_size             65536               Size of chunks read during auditing
 files_per_second            20                  Maximum files audited per second per
                                                 auditor process. Should be tuned according

etc/object-server.conf-sample

@@ -282,6 +282,9 @@ use = egg:swift#recon
 # log_level = INFO
 # log_address = /dev/log
 #
+# Time in seconds to wait between auditor passes
+# interval = 30
+#
 # You can set the disk chunk size that the auditor uses making it larger if
 # you like for more efficient local auditing of larger objects
 # disk_chunk_size = 65536

swift/obj/auditor.py

@@ -29,8 +29,6 @@ from swift.common.utils import get_logger, ratelimit_sleep, dump_recon_cache, \
 from swift.common.exceptions import DiskFileQuarantined, DiskFileNotExist
 from swift.common.daemon import Daemon
 
-SLEEP_BETWEEN_AUDITS = 30
-
 
 class AuditorWorker(object):
     """Walk through file system to audit objects"""
@@ -230,9 +228,10 @@ class ObjectAuditor(Daemon):
         self.recon_cache_path = conf.get('recon_cache_path',
                                          '/var/cache/swift')
         self.rcache = os.path.join(self.recon_cache_path, "object.recon")
+        self.interval = int(conf.get('interval', 30))
 
     def _sleep(self):
-        time.sleep(SLEEP_BETWEEN_AUDITS)
+        time.sleep(self.interval)
 
     def clear_recon_cache(self, auditor_type):
         """Clear recon cache entries"""

test/unit/obj/test_auditor.py

@@ -533,10 +533,20 @@ class TestAuditor(unittest.TestCase):
     def test_sleeper(self):
         with mock.patch(
                 'time.sleep', mock.MagicMock()) as mock_sleep:
-            auditor.SLEEP_BETWEEN_AUDITS = 0.10
             my_auditor = auditor.ObjectAuditor(self.conf)
             my_auditor._sleep()
-            mock_sleep.assert_called_with(auditor.SLEEP_BETWEEN_AUDITS)
+            mock_sleep.assert_called_with(30)
+
+            my_conf = dict(interval=2)
+            my_conf.update(self.conf)
+            my_auditor = auditor.ObjectAuditor(my_conf)
+            my_auditor._sleep()
+            mock_sleep.assert_called_with(2)
+
+            my_auditor = auditor.ObjectAuditor(self.conf)
+            my_auditor.interval = 2
+            my_auditor._sleep()
+            mock_sleep.assert_called_with(2)
 
     def test_run_parallel_audit(self):