qa/cephfs: add tests for confirmationn required to change max_mds

Add tests to ensure that when cluster has any health warning, especially
MDS_TRIM, confirmation flag is mandatory to change max_mds.

Signed-off-by: Rishabh Dave <[email protected]>

Author: rishabh-d-dave

qa/tasks/cephfs/filesystem.py

@@ -640,8 +640,11 @@ def set_down(self, down=True):
     def set_joinable(self, joinable=True):
         self.set_var("joinable", joinable)
 
-    def set_max_mds(self, max_mds):
-        self.set_var("max_mds", "%d" % max_mds)
+    def set_max_mds(self, max_mds, confirm=True):
+        if confirm:
+            self.set_var('max_mds', f'{max_mds}', '--yes-i-really-mean-it')
+        else:
+            self.set_var("max_mds", f"{max_mds}",)
 
     def set_session_timeout(self, timeout):
         self.set_var("session_timeout", "%d" % timeout)

qa/tasks/cephfs/test_admin.py

@@ -2659,3 +2659,60 @@ def test_with_health_warn_with_2_active_MDSs(self):
                               errmsgs=health_warn)
         self.run_ceph_cmd(f'mds fail {mds1_id} --yes-i-really-mean-it')
         self.run_ceph_cmd(f'mds fail {mds2_id} --yes-i-really-mean-it')
+
+
+class TestFSSetMaxMDS(TestAdminCommands):
+
+    def test_when_unhealthy_without_confirm(self):
+        '''
+        Test that command "ceph fs set <fsname> max_mds <num>" without the
+        confirmation flag (--yes-i-really-mean-it) fails when cluster is
+        unhealthy.
+        '''
+        self.gen_health_warn_mds_cache_oversized()
+
+        with self.assertRaises(CommandFailedError) as cfe:
+            self.fs.set_max_mds(2, confirm=False)
+        self.assertEqual(cfe.exception.exitstatus, errno.EPERM)
+
+    def test_when_unhealthy_with_confirm(self):
+        '''
+        Test that command "ceph fs set <fsname> max_mds <num>
+        --yes-i-really-mean-it" runs successfully when cluster is unhealthy.
+        '''
+        self.gen_health_warn_mds_cache_oversized()
+
+        self.fs.set_max_mds(2, confirm=True)
+        self.assertEqual(self.fs.get_var('max_mds'), 2)
+
+    def test_when_mds_trim_without_confirm(self):
+        '''
+        Test that command "ceph fs set <fsname> max_mds <num>" without the
+        confirmation flag (--yes-i-really-mean-it) fails when cluster has
+        MDS_TRIM health warning.
+        '''
+        self.gen_health_warn_mds_trim()
+
+        with self.assertRaises(CommandFailedError) as cfe:
+            self.fs.set_max_mds(2, confirm=False)
+        self.assertEqual(cfe.exception.exitstatus, errno.EPERM)
+
+    def test_when_mds_trim_when_with_confirm(self):
+        '''
+        Test that command "ceph fs set <fsname> max_mds <num>
+        --yes-i-really-mean-it" runs successfully when cluster has MDS_TRIM
+        health warning.
+        '''
+        self.gen_health_warn_mds_trim()
+
+        self.fs.set_max_mds(2, confirm=True)
+        self.assertEqual(self.fs.get_var('max_mds'), 2)
+
+    def test_when_healthy_with_confirm(self):
+        '''
+        Test that command "ceph fs set <fsname> max_mds <num>
+        --yes-i-really-mean-it" runs successfully also when cluster is
+        healthy.
+        '''
+        self.fs.set_max_mds(2, confirm=True)
+        self.assertEqual(self.fs.get_var('max_mds'), 2)