qa: choose victim pg from rbd pool

Right now scrub_test picks any pg in ceph. Unfortunately, it picked the
.mgr pool's only pg in [1]:

	2021-05-16T11:36:35.035 DEBUG:teuthology.orchestra.run.smithi049:> adjust-ulimits ceph-coverage /home/ubuntu/cephtest/archive/coverage rados --cluster ceph --pool rbd setomapval main.db-journal.0000000000000000 key val

Instead, only pick a pg in the rbd pool.

[1] /ceph/teuthology-archive/kchai-2021-05-16_11:19:39-rados-wip-kefu-testing-2021-05-16-1043-distro-basic-smithi/6117396/teuthology.log

Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/qa/tasks/scrub_test.py b/qa/tasks/scrub_test.py
index 3d629e9d746..edf1069529b 100644
--- a/qa/tasks/scrub_test.py
+++ b/qa/tasks/scrub_test.py
@@ -13,13 +13,17 @@ from teuthology import misc as teuthology
 log = logging.getLogger(__name__)
 
 
-def wait_for_victim_pg(manager):
+def wait_for_victim_pg(manager, poolid):
     """Return a PG with some data and its acting set"""
     # wait for some PG to have data that we can mess with
     victim = None
     while victim is None:
         stats = manager.get_pg_stats()
         for pg in stats:
+            pgid = str(pg['pgid'])
+            pgpool = int(pgid.split('.')[0])
+            if poolid != pgpool:
+                continue
             size = pg['stat_sum']['num_bytes']
             if size > 0:
                 victim = pg['pgid']
@@ -368,12 +372,20 @@ def task(ctx, config):
     manager.flush_pg_stats(range(num_osds))
     manager.wait_for_clean()
 
+    osd_dump = manager.get_osd_dump_json()
+    poolid = -1
+    for p in osd_dump['pools']:
+        if p['pool_name'] == 'rbd':
+            poolid = p['pool']
+            break
+    assert poolid != -1
+
     # write some data
     p = manager.do_rados(['bench', '--no-cleanup', '1', 'write', '-b', '4096'], pool='rbd')
     log.info('err is %d' % p.exitstatus)
 
     # wait for some PG to have data that we can mess with
-    pg, acting = wait_for_victim_pg(manager)
+    pg, acting = wait_for_victim_pg(manager, poolid)
     osd = acting[0]
 
     osd_remote, obj_path, obj_name = find_victim_object(ctx, pg, osd)