1 files changed, 104 insertions, 0 deletions
diff --git a/src/ceph/qa/tasks/osd_backfill.py b/src/ceph/qa/tasks/osd_backfill.py
new file mode 100644
index 0000000..04658d2
--- /dev/null
+++ b/src/ceph/qa/tasks/osd_backfill.py
@@ -0,0 +1,104 @@
+"""
+Osd backfill test
+"""
+import logging
+import ceph_manager
+import time
+from teuthology import misc as teuthology
+
+
+log = logging.getLogger(__name__)
+
+
+def rados_start(ctx, remote, cmd):
+    """
+    Run a remote rados command (currently used to only write data)
+    """
+    log.info("rados %s" % ' '.join(cmd))
+    testdir = teuthology.get_testdir(ctx)
+    pre = [
+        'adjust-ulimits',
+        'ceph-coverage',
+        '{tdir}/archive/coverage'.format(tdir=testdir),
+        'rados',
+        ];
+    pre.extend(cmd)
+    proc = remote.run(
+        args=pre,
+        wait=False,
+        )
+    return proc
+
+def task(ctx, config):
+    """
+    Test backfill
+    """
+    if config is None:
+        config = {}
+    assert isinstance(config, dict), \
+        'thrashosds task only accepts a dict for configuration'
+    first_mon = teuthology.get_first_mon(ctx, config)
+    (mon,) = ctx.cluster.only(first_mon).remotes.iterkeys()
+
+    num_osds = teuthology.num_instances_of_type(ctx.cluster, 'osd')
+    log.info('num_osds is %s' % num_osds)
+    assert num_osds == 3
+
+    manager = ceph_manager.CephManager(
+        mon,
+        ctx=ctx,
+        logger=log.getChild('ceph_manager'),
+        )
+
+    while len(manager.get_osd_status()['up']) < 3:
+        time.sleep(10)
+    manager.flush_pg_stats([0, 1, 2])
+    manager.wait_for_clean()
+
+    # write some data
+    p = rados_start(ctx, mon, ['-p', 'rbd', 'bench', '15', 'write', '-b', '4096',
+                          '--no-cleanup'])
+    err = p.wait()
+    log.info('err is %d' % err)
+
+    # mark osd.0 out to trigger a rebalance/backfill
+    manager.mark_out_osd(0)
+
+    # also mark it down to it won't be included in pg_temps
+    manager.kill_osd(0)
+    manager.mark_down_osd(0)
+
+    # wait for everything to peer and be happy...
+    manager.flush_pg_stats([1, 2])
+    manager.wait_for_recovery()
+
+    # write some new data
+    p = rados_start(ctx, mon, ['-p', 'rbd', 'bench', '30', 'write', '-b', '4096',
+                          '--no-cleanup'])
+
+    time.sleep(15)
+
+    # blackhole + restart osd.1
+    # this triggers a divergent backfill target
+    manager.blackhole_kill_osd(1)
+    time.sleep(2)
+    manager.revive_osd(1)
+
+    # wait for our writes to complete + succeed
+    err = p.wait()
+    log.info('err is %d' % err)
+
+    # wait for osd.1 and osd.2 to be up
+    manager.wait_till_osd_is_up(1)
+    manager.wait_till_osd_is_up(2)
+
+    # cluster must recover
+    manager.flush_pg_stats([1, 2])
+    manager.wait_for_recovery()
+
+    # re-add osd.0
+    manager.revive_osd(0)
+    manager.flush_pg_stats([1, 2])
+    manager.wait_for_clean()
+
+