test: add a test for `fs set down` on online cluster

Fixes: https://tracker.ceph.com/issues/66960
Signed-off-by: chungfengz <chungfengz@synology.com>
(cherry picked from commit f8becaaedb206e7b683698aac296b48e646e44b9)

diff --git a/qa/workunits/cephtool/test.sh b/qa/workunits/cephtool/test.sh
index d00e9b04b0a7fa2a283a4afe8b3ba07fd8f29d23..ed652b9f74bf28323b05224d30dec435a60032ec 100755 (executable)
--- a/qa/workunits/cephtool/test.sh
+++ b/qa/workunits/cephtool/test.sh
@@ -913,6 +913,11 @@ function test_mon_mds()
   ceph fs set $FS_NAME cluster_down true
   ceph fs set $FS_NAME cluster_down false
 
+  ceph fs set $FS_NAME max_mds 2
+  ceph fs get $FS_NAME | expect_true grep -P -q 'max_mds\t2'
+  ceph fs set $FS_NAME down false
+  ceph fs get $FS_NAME | expect_true grep -P -q 'max_mds\t2'
+
   ceph mds compat rm_incompat 4
   ceph mds compat rm_incompat 4