1 files changed, 160 insertions, 0 deletions
diff --git a/src/ceph/qa/tasks/divergent_priors.py b/src/ceph/qa/tasks/divergent_priors.py
new file mode 100644
index 0000000..12ea933
--- /dev/null
+++ b/src/ceph/qa/tasks/divergent_priors.py
@@ -0,0 +1,160 @@
+"""
+Special case divergence test
+"""
+import logging
+import time
+
+from teuthology import misc as teuthology
+from util.rados import rados
+
+
+log = logging.getLogger(__name__)
+
+
+def task(ctx, config):
+    """
+    Test handling of divergent entries with prior_version
+    prior to log_tail
+
+    overrides:
+      ceph:
+        conf:
+          osd:
+            debug osd: 5
+
+    Requires 3 osds on a single test node.
+    """
+    if config is None:
+        config = {}
+    assert isinstance(config, dict), \
+        'divergent_priors task only accepts a dict for configuration'
+
+    manager = ctx.managers['ceph']
+
+    while len(manager.get_osd_status()['up']) < 3:
+        time.sleep(10)
+    manager.flush_pg_stats([0, 1, 2])
+    manager.raw_cluster_cmd('osd', 'set', 'noout')
+    manager.raw_cluster_cmd('osd', 'set', 'noin')
+    manager.raw_cluster_cmd('osd', 'set', 'nodown')
+    manager.wait_for_clean()
+
+    # something that is always there
+    dummyfile = '/etc/fstab'
+    dummyfile2 = '/etc/resolv.conf'
+
+    # create 1 pg pool
+    log.info('creating foo')
+    manager.raw_cluster_cmd('osd', 'pool', 'create', 'foo', '1')
+
+    osds = [0, 1, 2]
+    for i in osds:
+        manager.set_config(i, osd_min_pg_log_entries=10)
+        manager.set_config(i, osd_max_pg_log_entries=10)
+        manager.set_config(i, osd_pg_log_trim_min=5)
+
+    # determine primary
+    divergent = manager.get_pg_primary('foo', 0)
+    log.info("primary and soon to be divergent is %d", divergent)
+    non_divergent = list(osds)
+    non_divergent.remove(divergent)
+
+    log.info('writing initial objects')
+    first_mon = teuthology.get_first_mon(ctx, config)
+    (mon,) = ctx.cluster.only(first_mon).remotes.iterkeys()
+    # write 100 objects
+    for i in range(100):
+        rados(ctx, mon, ['-p', 'foo', 'put', 'existing_%d' % i, dummyfile])
+
+    manager.wait_for_clean()
+
+    # blackhole non_divergent
+    log.info("blackholing osds %s", str(non_divergent))
+    for i in non_divergent:
+        manager.set_config(i, objectstore_blackhole=1)
+
+    DIVERGENT_WRITE = 5
+    DIVERGENT_REMOVE = 5
+    # Write some soon to be divergent
+    log.info('writing divergent objects')
+    for i in range(DIVERGENT_WRITE):
+        rados(ctx, mon, ['-p', 'foo', 'put', 'existing_%d' % i,
+                         dummyfile2], wait=False)
+    # Remove some soon to be divergent
+    log.info('remove divergent objects')
+    for i in range(DIVERGENT_REMOVE):
+        rados(ctx, mon, ['-p', 'foo', 'rm',
+                         'existing_%d' % (i + DIVERGENT_WRITE)], wait=False)
+    time.sleep(10)
+    mon.run(
+        args=['killall', '-9', 'rados'],
+        wait=True,
+        check_status=False)
+
+    # kill all the osds but leave divergent in
+    log.info('killing all the osds')
+    for i in osds:
+        manager.kill_osd(i)
+    for i in osds:
+        manager.mark_down_osd(i)
+    for i in non_divergent:
+        manager.mark_out_osd(i)
+
+    # bring up non-divergent
+    log.info("bringing up non_divergent %s", str(non_divergent))
+    for i in non_divergent:
+        manager.revive_osd(i)
+    for i in non_divergent:
+        manager.mark_in_osd(i)
+
+    # write 1 non-divergent object (ensure that old divergent one is divergent)
+    objname = "existing_%d" % (DIVERGENT_WRITE + DIVERGENT_REMOVE)
+    log.info('writing non-divergent object ' + objname)
+    rados(ctx, mon, ['-p', 'foo', 'put', objname, dummyfile2])
+
+    manager.wait_for_recovery()
+
+    # ensure no recovery of up osds first
+    log.info('delay recovery')
+    for i in non_divergent:
+        manager.wait_run_admin_socket(
+            'osd', i, ['set_recovery_delay', '100000'])
+
+    # bring in our divergent friend
+    log.info("revive divergent %d", divergent)
+    manager.raw_cluster_cmd('osd', 'set', 'noup')
+    manager.revive_osd(divergent)
+
+    log.info('delay recovery divergent')
+    manager.wait_run_admin_socket(
+        'osd', divergent, ['set_recovery_delay', '100000'])
+
+    manager.raw_cluster_cmd('osd', 'unset', 'noup')
+    while len(manager.get_osd_status()['up']) < 3:
+        time.sleep(10)
+
+    log.info('wait for peering')
+    rados(ctx, mon, ['-p', 'foo', 'put', 'foo', dummyfile])
+
+    # At this point the divergent_priors should have been detected
+
+    log.info("killing divergent %d", divergent)
+    manager.kill_osd(divergent)
+    log.info("reviving divergent %d", divergent)
+    manager.revive_osd(divergent)
+
+    time.sleep(20)
+
+    log.info('allowing recovery')
+    # Set osd_recovery_delay_start back to 0 and kick the queue
+    for i in osds:
+        manager.raw_cluster_cmd('tell', 'osd.%d' % i, 'debug',
+                                    'kick_recovery_wq', ' 0')
+
+    log.info('reading divergent objects')
+    for i in range(DIVERGENT_WRITE + DIVERGENT_REMOVE):
+        exit_status = rados(ctx, mon, ['-p', 'foo', 'get', 'existing_%d' % i,
+                                       '/tmp/existing'])
+        assert exit_status is 0
+
+    log.info("success")