From 7a3ab878848a61817937db3598919a129d2cd348 Mon Sep 17 00:00:00 2001
From: Barak Sason Rofman <bsasonro@redhat.com>
Date: Tue, 19 Jan 2021 13:30:55 +0200
Subject: [Test] Add TC to test multiple volume shrinks and rebalance

Test case:
1. Modify the distribution count of a volume
2. Create a volume, start it and mount it
3. Create some file on mountpoint
4. Collect arequal checksum on mount point pre-rebalance
5. Do the following 3 times:
6. Shrink the volume
7. Collect arequal checksum on mount point post-rebalance
and compare with value from step 4

Change-Id: Ib64575e759617684009c68d8b6bb5f011c553b55
Signed-off-by: Barak Sason Rofman <bsasonro@redhat.com>
---
 .../dht/test_rebalance_multiple_shrinks.py         | 87 ++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 tests/functional/dht/test_rebalance_multiple_shrinks.py

(limited to 'tests')

diff --git a/tests/functional/dht/test_rebalance_multiple_shrinks.py b/tests/functional/dht/test_rebalance_multiple_shrinks.py
new file mode 100644
index 000000000..a95cdf141
--- /dev/null
+++ b/tests/functional/dht/test_rebalance_multiple_shrinks.py
@@ -0,0 +1,87 @@
+#  Copyright (C) 2021 Red Hat, Inc. <http://www.redhat.com>
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License along`
+#  with this program; if not, write to the Free Software Foundation, Inc.,
+#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+from glusto.core import Glusto as g
+from glustolibs.gluster.gluster_base_class import GlusterBaseClass, runs_on
+from glustolibs.gluster.exceptions import ExecutionError
+from glustolibs.gluster.volume_libs import shrink_volume
+from glustolibs.io.utils import collect_mounts_arequal
+
+
+@runs_on([['distributed'], ['glusterfs']])
+class TestRebalanceMultipleShrinks(GlusterBaseClass):
+
+    def setUp(self):
+
+        self.get_super_method(self, 'setUp')()
+
+        # Changing dist_count to 6
+        self.volume['voltype']['dist_count'] = 6
+
+        # Setup Volume
+        if not self.setup_volume_and_mount_volume([self.mounts[0]]):
+            raise ExecutionError("Failed to Setup and mount volume")
+
+        self.first_client = self.mounts[0].client_system
+
+    def tearDown(self):
+
+        # Unmount and clean volume
+        if not self.unmount_volume_and_cleanup_volume([self.mounts[0]]):
+            raise ExecutionError("Failed to Cleanup Volume")
+
+        # Calling GlusterBaseClass tearDown
+        self.get_super_method(self, 'tearDown')()
+
+    def test_rebalance_multiple_shrinks(self):
+        """
+        Test case:
+        1. Modify the distribution count of a volume
+        2. Create a volume, start it and mount it
+        3. Create some file on mountpoint
+        4. Collect arequal checksum on mount point pre-rebalance
+        5. Do the following 3 times:
+        6. Shrink the volume
+        7. Collect arequal checksum on mount point post-rebalance
+           and compare with value from step 4
+        """
+
+        # Create some file on mountpoint
+        cmd = ("cd %s; for i in {1..500} ; do "
+               "dd if=/dev/urandom of=file$i bs=10M count=1; done"
+               % self.mounts[0].mountpoint)
+        ret, _, _ = g.run(self.first_client, cmd)
+        self.assertEqual(ret, 0, "IO failed on volume %s"
+                         % self.volname)
+
+        # Collect arequal checksum before rebalance
+        arequal_checksum_before = collect_mounts_arequal(self.mounts[0])
+
+        for _ in range(3):
+            # Shrink volume
+            ret = shrink_volume(self.mnode, self.volname,
+                                rebalance_timeout=16000)
+            self.assertTrue(ret, "Failed to remove-brick from volume")
+            g.log.info("Remove-brick rebalance successful")
+
+            # Collect arequal checksum after rebalance
+            arequal_checksum_after = collect_mounts_arequal(self.mounts[0])
+
+            # Check for data loss by comparing arequal before and after
+            # rebalance
+            self.assertEqual(arequal_checksum_before, arequal_checksum_after,
+                             "arequal checksum is NOT MATCHNG")
+            g.log.info("arequal checksum is SAME")
-- 
cgit