1 files changed, 73 insertions, 0 deletions
diff --git a/qa/tasks/mon_clock_skew_check.py b/qa/tasks/mon_clock_skew_check.py
new file mode 100644
index 000000000..59d4169d1
--- /dev/null
+++ b/qa/tasks/mon_clock_skew_check.py
@@ -0,0 +1,73 @@
+"""
+Handle clock skews in monitors.
+"""
+import logging
+import time
+from tasks import ceph_manager
+from teuthology import misc as teuthology
+
+log = logging.getLogger(__name__)
+
+class ClockSkewCheck:
+    """
+    Check if there are any clock skews among the monitors in the
+    quorum.
+
+    This task accepts the following options:
+
+    interval     amount of seconds to wait before check. (default: 30.0)
+    expect-skew  'true' or 'false', to indicate whether to expect a skew during
+                 the run or not. If 'true', the test will fail if no skew is
+                 found, and succeed if a skew is indeed found; if 'false', it's
+                 the other way around. (default: false)
+
+    - mon_clock_skew_check:
+        expect-skew: true
+    """
+
+    def __init__(self, ctx, manager, config, logger):
+        self.ctx = ctx
+        self.manager = manager
+
+        self.stopping = False
+        self.logger = logger
+        self.config = config
+
+        if self.config is None:
+            self.config = dict()
+
+
+def task(ctx, config):
+    if config is None:
+        config = {}
+    assert isinstance(config, dict), \
+        'mon_clock_skew_check task only accepts a dict for configuration'
+    interval = float(config.get('interval', 30.0))
+    expect_skew = config.get('expect-skew', False)
+
+    log.info('Beginning mon_clock_skew_check...')
+    first_mon = teuthology.get_first_mon(ctx, config)
+    (mon,) = ctx.cluster.only(first_mon).remotes.keys()
+    manager = ceph_manager.CephManager(
+        mon,
+        ctx=ctx,
+        logger=log.getChild('ceph_manager'),
+        )
+
+    quorum_size = len(teuthology.get_mon_names(ctx))
+    manager.wait_for_mon_quorum_size(quorum_size)
+
+    # wait a bit
+    log.info('sleeping for {s} seconds'.format(
+        s=interval))
+    time.sleep(interval)
+
+    health = manager.get_mon_health(True)
+    log.info('got health %s' % health)
+    if expect_skew:
+        if 'MON_CLOCK_SKEW' not in health['checks']:
+            raise RuntimeError('expected MON_CLOCK_SKEW but got none')
+    else:
+        if 'MON_CLOCK_SKEW' in health['checks']:
+            raise RuntimeError('got MON_CLOCK_SKEW but expected none')
+