1 files changed, 27 insertions, 0 deletions
diff --git a/qa/tasks/mds_pre_upgrade.py b/qa/tasks/mds_pre_upgrade.py
new file mode 100644
index 000000000..812d402ed
--- /dev/null
+++ b/qa/tasks/mds_pre_upgrade.py
@@ -0,0 +1,27 @@
+"""
+Prepare MDS cluster for upgrade.
+"""
+
+import logging
+
+from tasks.cephfs.filesystem import Filesystem
+
+log = logging.getLogger(__name__)
+
+def task(ctx, config):
+    """
+    Prepare MDS cluster for upgrade.
+
+    This task reduces ranks to 1 and stops all standbys.
+    """
+
+    if config is None:
+        config = {}
+    assert isinstance(config, dict), \
+        'snap-upgrade task only accepts a dict for configuration'
+
+    fs = Filesystem(ctx)
+    fs.getinfo() # load name
+    fs.set_allow_standby_replay(False)
+    fs.set_max_mds(1)
+    fs.reach_max_mds()