[Test] Add test to fill brick and perform rename

Test case:
1. Create a volume, start it and mount it.
2. Calculate the usable size and fill till it reachs min free limit
3. Rename the file
4. Try to perfrom I/O from mount point.(This should fail)

Change-Id: Iaee9944b6ba676157ee2453d734a4335aac27811
Signed-off-by: kshithijiyer <kshithij.ki@gmail.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/tests/functional/dht/test_rename_with_brick_min_free_limit_crossed.py b/tests/functional/dht/test_rename_with_brick_min_free_limit_crossed.py
new file mode 100644
index 000000000..0745ef565
--- /dev/null
+++ b/tests/functional/dht/test_rename_with_brick_min_free_limit_crossed.py
@@ -0,0 +1,85 @@
+#  Copyright (C) 2020 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.lib_utils import get_size_of_mountpoint
+from glustolibs.gluster.brick_libs import get_all_bricks
+
+
+@runs_on([['distributed'], ['glusterfs']])
+class TestRenameWithBricksMinFreeLimitCrossed(GlusterBaseClass):
+
+    def setUp(self):
+
+        self.get_super_method(self, 'setUp')()
+
+        # Changing dist_count to 1
+        self.volume['voltype']['dist_count'] = 1
+
+        # Creating Volume and mounting the volume
+        ret = self.setup_volume_and_mount_volume([self.mounts[0]])
+        if not ret:
+            raise ExecutionError("Volume creation or mount failed: %s"
+                                 % self.volname)
+
+        self.first_client = self.mounts[0].client_system
+        self.mount_point = self.mounts[0].mountpoint
+
+    def tearDown(self):
+
+        # Unmounting and cleaning volume
+        ret = self.unmount_volume_and_cleanup_volume([self.mounts[0]])
+        if not ret:
+            raise ExecutionError("Unable to delete volume %s" % self.volname)
+
+        self.get_super_method(self, 'tearDown')()
+
+    def test_rename_with_brick_min_free_limit_crossed(self):
+        """
+        Test case:
+        1. Create a volume, start it and mount it.
+        2. Calculate the usable size and fill till it reachs min free limit
+        3. Rename the file
+        4. Try to perfrom I/O from mount point.(This should fail)
+        """
+        bricks = get_all_bricks(self.mnode, self.volname)
+
+        # Calculate the usable size and fill till it reachs
+        # min free limit
+        node, brick_path = bricks[0].split(':')
+        size = int(get_size_of_mountpoint(node, brick_path))
+        min_free_size = size * 10 // 100
+        usable_size = ((size - min_free_size) // 1048576) + 1
+        ret, _, _ = g.run(self.first_client, "fallocate -l {}G {}/file"
+                          .format(usable_size, self.mount_point))
+        self.assertFalse(ret, "Failed to fill disk to min free limit")
+        g.log.info("Disk filled up to min free limit")
+
+        # Rename the file
+        ret, _, _ = g.run(self.first_client, "mv {}/file {}/Renamedfile"
+                          .format(self.mount_point, self.mount_point))
+        self.assertFalse(ret, "Rename failed on file to Renamedfile")
+        g.log.info("File renamed successfully")
+
+        # Try to perfrom I/O from mount point(This should fail)
+        ret, _, _ = g.run(self.first_client,
+                          "fallocate -l 5G {}/mfile".format(self.mount_point))
+        self.assertTrue(ret,
+                        "Unexpected: Able to do I/O even when disks are "
+                        "filled to min free limit")
+        g.log.info("Expected: Unable to perfrom I/O as min free disk is hit")