qa/cephfs: set joinable on FS before exiting tests in TestFSFail

After running TestFSFail, CephFSTestCase.tearDown() fails attempting
to unmount CephFS. Set joinable on FS and wait for the MDS to be up
before exiting the test. This will ensure that unmounting is
successful in teardown.

Fixes: https://tracker.ceph.com/issues/65841
Signed-off-by: Rishabh Dave <[email protected]>

Author: rishabh-d-dave

qa/tasks/cephfs/test_admin.py

@@ -2306,6 +2306,11 @@ def test_with_health_warn_oversize_cache(self):
                               retval=1, errmsgs=errmsg)
         self.run_ceph_cmd(f'fs fail {self.fs.name} --yes-i-really-mean-it')
 
+        # Bring and wait for MDS to be up since it is needed for unmounting
+        # of CephFS in CephFSTestCase.tearDown() to be successful.
+        self.fs.set_joinable()
+        self.fs.wait_for_daemons()
+
     def test_with_health_warn_trim(self):
         '''
         Test that, when health warning MDS_TRIM is present for an MDS, command
@@ -2330,6 +2335,11 @@ def test_with_health_warn_trim(self):
                               retval=1, errmsgs=errmsg)
         self.run_ceph_cmd(f'fs fail {self.fs.name} --yes-i-really-mean-it')
 
+        # Bring and wait for MDS to be up since it is needed for unmounting
+        # of CephFS in CephFSTestCase.tearDown() to be successful.
+        self.fs.set_joinable()
+        self.fs.wait_for_daemons()
+
     def test_with_health_warn_with_2_active_MDSs(self):
         '''
         Test that, when a CephFS has 2 active MDSs and one of them have either
@@ -2354,6 +2364,11 @@ def test_with_health_warn_with_2_active_MDSs(self):
                               retval=1, errmsgs=errmsg)
         self.run_ceph_cmd(f'fs fail {self.fs.name} --yes-i-really-mean-it')
 
+        # Bring and wait for MDS to be up since it is needed for unmounting
+        # of CephFS in CephFSTestCase.tearDown() to be successful.
+        self.fs.set_joinable()
+        self.fs.wait_for_daemons()
+
 
 class TestMDSFail(TestAdminCommands):