1 files changed, 71 insertions, 0 deletions
diff --git a/qa/tasks/cephadm_cases/test_cli_mon.py b/qa/tasks/cephadm_cases/test_cli_mon.py
new file mode 100644
index 000000000..72aee094e
--- /dev/null
+++ b/qa/tasks/cephadm_cases/test_cli_mon.py
@@ -0,0 +1,71 @@
+import json
+import logging
+
+from tasks.mgr.mgr_test_case import MgrTestCase
+
+log = logging.getLogger(__name__)
+
+
+class TestCephadmCLI(MgrTestCase):
+
+    APPLY_MON_PERIOD = 60
+
+    def _cmd(self, *args) -> str:
+        assert self.mgr_cluster is not None
+        return self.mgr_cluster.mon_manager.raw_cluster_cmd(*args)
+
+    def _orch_cmd(self, *args) -> str:
+        return self._cmd("orch", *args)
+
+    def setUp(self):
+        super(TestCephadmCLI, self).setUp()
+
+    def _create_and_write_pool(self, pool_name):
+        # Create new pool and write to it, simulating a small workload.
+        self.mgr_cluster.mon_manager.create_pool(pool_name)
+        args = [
+            "rados", "-p", pool_name, "bench", "30", "write", "-t", "16"]
+        self.mgr_cluster.admin_remote.run(args=args, wait=True)
+    
+    def _get_quorum_size(self) -> int:
+        # Evaluate if the quorum size of the cluster is correct.
+        # log the quorum_status before reducing the monitors
+        retstr = self._cmd('quorum_status')
+        log.info("test_apply_mon._check_quorum_size: %s" % json.dumps(retstr, indent=2))
+        quorum_size = len(json.loads(retstr)['quorum']) # get quorum size
+        return quorum_size
+
+    def _check_no_crashes(self):
+        # Evaluate if there are no crashes
+        # log the crash
+        retstr = self.mgr_cluster.mon_manager.raw_cluster_cmd(
+            'crash', 'ls',
+        )
+        log.info("test_apply_mon._check_no_crashes: %s" % retstr)
+        self.assertEqual(0, len(retstr)) # check if there are no crashes
+
+    def test_apply_mon_three(self):
+        # Evaluating the process of reducing the number of 
+        # monitors from 5 to 3 and increasing the number of
+        # monitors from 3 to 5, using the `ceph orch apply mon <num>` command.
+
+        self.wait_until_equal(lambda : self._get_quorum_size(), 5,
+                      timeout=self.APPLY_MON_PERIOD, period=10)
+
+        self._orch_cmd('apply', 'mon', '3') # reduce the monitors from 5 -> 3
+
+        self._create_and_write_pool('test_pool1')
+
+        self.wait_until_equal(lambda : self._get_quorum_size(), 3,
+                      timeout=self.APPLY_MON_PERIOD, period=10)
+
+        self._check_no_crashes()
+
+        self._orch_cmd('apply', 'mon', '5') # increase the monitors from 3 -> 5
+
+        self._create_and_write_pool('test_pool2')
+
+        self.wait_until_equal(lambda : self._get_quorum_size(), 5,
+                      timeout=self.APPLY_MON_PERIOD, period=10)
+
+        self._check_no_crashes()
+\ No newline at end of file