import ddt from openshiftstoragelibs.baseclass import BaseClass from openshiftstoragelibs import heketi_ops from openshiftstoragelibs import heketi_version from openshiftstoragelibs.openshift_ops import ( cmd_run_on_gluster_pod_or_node, get_gluster_vol_info_by_pvc_name, oc_create_pvc, oc_create_tiny_pod_with_volume, oc_delete, resize_pvc, verify_pvc_size, verify_pvc_status_is_bound, wait_for_pod_be_ready, wait_for_resource_absence, ) from openshiftstoragelibs.openshift_version import get_openshift_version @ddt.ddt class TestArbiterVolumeCreateExpandDelete(BaseClass): def setUp(self): super(TestArbiterVolumeCreateExpandDelete, self).setUp() self.node = self.ocp_master_node[0] if get_openshift_version() < "3.9": self.skipTest("Arbiter feature cannot be used on OCP older " "than 3.9, because 'volumeoptions' for Heketi " "is not supported there.") version = heketi_version.get_heketi_version(self.heketi_client_node) if version < '6.0.0-11': self.skipTest("heketi-client package %s does not support arbiter " "functionality" % version.v_str) # Mark one of the Heketi nodes as arbiter-supported if none of # existent nodes or devices already enabled to support it. self.heketi_server_url = self.sc.get('resturl') arbiter_tags = ('required', 'supported') arbiter_already_supported = False self.node_id_list = heketi_ops.heketi_node_list( self.heketi_client_node, self.heketi_server_url) for node_id in self.node_id_list[::-1]: node_info = heketi_ops.heketi_node_info( self.heketi_client_node, self.heketi_server_url, node_id, json=True) if node_info.get('tags', {}).get('arbiter') in arbiter_tags: arbiter_already_supported = True break for device in node_info['devices'][::-1]: if device.get('tags', {}).get('arbiter') in arbiter_tags: arbiter_already_supported = True break else: continue break if not arbiter_already_supported: self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'node', self.node_id_list[0], 'supported') def _set_arbiter_tag_with_further_revert(self, node, server_url, source, source_id, tag_value, revert_to=None): if tag_value is None: # Remove arbiter tag logic heketi_ops.rm_arbiter_tag(node, server_url, source, source_id) if revert_to is not None: self.addCleanup(heketi_ops.set_arbiter_tag, node, server_url, source, source_id, revert_to) else: # Add arbiter tag logic heketi_ops.set_arbiter_tag( node, server_url, source, source_id, tag_value) if revert_to is not None: self.addCleanup(heketi_ops.set_arbiter_tag, node, server_url, source, source_id, revert_to) else: self.addCleanup(heketi_ops.rm_arbiter_tag, node, server_url, source, source_id) def verify_amount_and_proportion_of_arbiter_and_data_bricks( self, vol_info, arbiter_bricks=1, data_bricks=2): # Verify amount and proportion of arbiter and data bricks bricks_list = vol_info['bricks']['brick'] bricks = { 'arbiter_list': [], 'data_list': [], 'arbiter_amount': 0, 'data_amount': 0 } for brick in bricks_list: if int(brick['isArbiter']) == 1: bricks['arbiter_list'].append(brick) else: bricks['data_list'].append(brick) bricks['arbiter_amount'] = len(bricks['arbiter_list']) bricks['data_amount'] = len(bricks['data_list']) self.assertGreaterEqual( bricks['arbiter_amount'], arbiter_bricks, "Arbiter brick amount is expected to be Greater or Equal to %s. " "Actual amount is '%s'." % ( arbiter_bricks, bricks['arbiter_amount'])) self.assertGreaterEqual( bricks['data_amount'], data_bricks, "Data brick amount is expected to be Greater or Equal to %s. " "Actual amount is '%s'." % (data_bricks, bricks['data_amount'])) self.assertEqual( bricks['data_amount'], (bricks['arbiter_amount'] * 2), "Expected 1 arbiter brick per 2 data bricks. " "Arbiter brick amount is '%s', Data brick amount is '%s'." % ( bricks['arbiter_amount'], bricks['data_amount']) ) return bricks def test_arbiter_pvc_create(self): """Validate dynamic provision of an arbiter volume""" # Create sc with gluster arbiter info self.create_storage_class(is_arbiter_vol=True) # Create PVC and wait for it to be in 'Bound' state self.create_and_wait_for_pvc() # Get vol info vol_info = get_gluster_vol_info_by_pvc_name(self.node, self.pvc_name) self.verify_amount_and_proportion_of_arbiter_and_data_bricks(vol_info) def test_arbiter_pvc_mount_on_pod(self): """Validate new volume creation using app pod""" # Create sc with gluster arbiter info self.create_storage_class(is_arbiter_vol=True) # Create PVC and wait for it to be in 'Bound' state self.create_and_wait_for_pvc() # Create POD with attached volume mount_path = "/mnt" pod_name = oc_create_tiny_pod_with_volume( self.node, self.pvc_name, "test-arbiter-pvc-mount-on-app-pod", mount_path=mount_path) self.addCleanup(oc_delete, self.node, 'pod', pod_name) # Wait for POD be up and running wait_for_pod_be_ready(self.node, pod_name, timeout=60, wait_step=2) # Get volume ID vol_info = get_gluster_vol_info_by_pvc_name(self.node, self.pvc_name) vol_id = vol_info["gluster_vol_id"] # Verify that POD has volume mounted on it cmd = "oc exec {0} -- df -PT {1} | grep {1}".format( pod_name, mount_path) out = self.cmd_run(cmd) err_msg = ("Failed to get info about mounted '%s' volume. " "Output is empty." % vol_id) self.assertTrue(out, err_msg) # Verify volume data on POD # Filesystem Type Size Used Avail Cap Mounted on # IP:vol_id fuse.glusterfs 1038336 33408 1004928 3% /mnt data = [s for s in out.strip().split(' ') if s] actual_vol_id = data[0].split(':')[-1] self.assertEqual( vol_id, actual_vol_id, "Volume ID does not match: expected is " "'%s' and actual is '%s'." % (vol_id, actual_vol_id)) self.assertIn( "gluster", data[1], "Filesystem type is expected to be of 'glusterfs' type. " "Actual value is '%s'." % data[1]) self.assertEqual( mount_path, data[6], "Unexpected mount path. Expected is '%s' and actual is '%s'." % ( mount_path, data[6])) max_size = 1024 ** 2 total_size = int(data[2]) self.assertLessEqual( total_size, max_size, "Volume has bigger size '%s' than expected - '%s'." % ( total_size, max_size)) min_available_size = int(max_size * 0.93) available_size = int(data[4]) self.assertLessEqual( min_available_size, available_size, "Minimum available size (%s) not satisfied. Actual is '%s'." % ( min_available_size, available_size)) # Write data on mounted volume write_data_cmd = ( "dd if=/dev/zero of=%s/file$i bs=%s count=1; " % ( mount_path, available_size)) self.cmd_run(write_data_cmd) def test_create_arbiter_vol_with_more_than_one_brick_set(self): """Validate volume creation using heketi for more than six brick set""" # Set arbiter:disabled tag to the data devices and get their info data_nodes = [] for node_id in self.node_id_list[0:2]: node_info = heketi_ops.heketi_node_info( self.heketi_client_node, self.heketi_server_url, node_id, json=True) if len(node_info['devices']) < 2: self.skipTest( "Nodes are expected to have at least 2 devices") if not all([int(d['storage']['free']) > (3 * 1024**2) for d in node_info['devices'][0:2]]): self.skipTest( "Devices are expected to have more than 3Gb of free space") for device in node_info['devices']: self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'device', device['id'], 'disabled', device.get('tags', {}).get('arbiter')) self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'node', node_id, 'disabled', node_info.get('tags', {}).get('arbiter')) data_nodes.append(node_info) # Set arbiter:required tag to all other nodes and their devices for node_id in self.node_id_list[2:]: node_info = heketi_ops.heketi_node_info( self.heketi_client_node, self.heketi_server_url, node_id, json=True) self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'node', node_id, 'required', node_info.get('tags', {}).get('arbiter')) for device in node_info['devices']: self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'device', device['id'], 'required', device.get('tags', {}).get('arbiter')) # Get second big volume between 2 data nodes and use it # for target vol calculation. for i, node_info in enumerate(data_nodes): biggest_disk_free_space = 0 for device in node_info['devices'][0:2]: free = int(device['storage']['free']) if free > biggest_disk_free_space: biggest_disk_free_space = free data_nodes[i]['biggest_free_space'] = biggest_disk_free_space target_vol_size_kb = 1 + min([ n['biggest_free_space'] for n in data_nodes]) # Check that all the data devices have, at least, half of required size all_big_enough = True for node_info in data_nodes: for device in node_info['devices'][0:2]: if float(device['storage']['free']) < (target_vol_size_kb / 2): all_big_enough = False break # Create sc with gluster arbiter info self.create_storage_class(is_arbiter_vol=True) # Create helper arbiter vol if not all the data devices have # half of required free space. if not all_big_enough: helper_vol_size_kb, target_vol_size_kb = 0, 0 smaller_device_id = None for node_info in data_nodes: devices = node_info['devices'] if ((devices[0]['storage']['free']) > ( devices[1]['storage']['free'])): smaller_device_id = devices[1]['id'] smaller_device = devices[1]['storage']['free'] bigger_device = devices[0]['storage']['free'] else: smaller_device_id = devices[0]['id'] smaller_device = devices[0]['storage']['free'] bigger_device = devices[1]['storage']['free'] diff = bigger_device - (2 * smaller_device) + 1 if diff > helper_vol_size_kb: helper_vol_size_kb = diff target_vol_size_kb = bigger_device - diff # Disable smaller device and create helper vol on bigger one # to reduce its size, then enable smaller device back. try: out = heketi_ops.heketi_device_disable( self.heketi_client_node, self.heketi_server_url, smaller_device_id) self.assertTrue(out) self.create_and_wait_for_pvc( int(helper_vol_size_kb / 1024.0**2) + 1) finally: out = heketi_ops.heketi_device_enable( self.heketi_client_node, self.heketi_server_url, smaller_device_id) self.assertTrue(out) # Create target arbiter volume self.create_and_wait_for_pvc(int(target_vol_size_kb / 1024.0**2)) # Get gluster volume info vol_info = get_gluster_vol_info_by_pvc_name(self.node, self.pvc_name) self.verify_amount_and_proportion_of_arbiter_and_data_bricks( vol_info, arbiter_bricks=2, data_bricks=4) # NOTE(vponomar): do not create big volumes setting value less than 64 # for 'avg_file_size'. It will cause creation of very huge amount of files # making one test run very loooooooong. @ddt.data( (2, 0), # noqa: equivalent of 64KB of avg size (1, 4), (2, 64), (3, 128), (3, 256), (5, 512), (5, 1024), (5, 10240), (10, 1024000), ) @ddt.unpack def test_verify_arbiter_brick_able_to_contain_expected_amount_of_files( self, pvc_size_gb, avg_file_size): """Validate arbiter brick creation with different avg file size""" # Create sc with gluster arbiter info self.create_storage_class( is_arbiter_vol=True, arbiter_avg_file_size=avg_file_size) # Create PVC and wait for it to be in 'Bound' state self.create_and_wait_for_pvc(pvc_size_gb) # Get volume info vol_info = get_gluster_vol_info_by_pvc_name(self.node, self.pvc_name) # Verify proportion of data and arbiter bricks bricks_info = ( self.verify_amount_and_proportion_of_arbiter_and_data_bricks( vol_info)) expected_file_amount = pvc_size_gb * 1024**2 / (avg_file_size or 64) expected_file_amount = (expected_file_amount / bricks_info['arbiter_amount']) # Try to create expected amount of files on arbiter brick mount passed_arbiter_bricks = [] not_found = "Mount Not Found" for brick in bricks_info['arbiter_list']: # "brick path" looks like following: # ip_addr:/path/to/vg/brick_unique_name/brick gluster_ip, brick_path = brick["name"].split(":") brick_path = brick_path[0:-6] cmd = "mount | grep %s || echo '%s'" % (brick_path, not_found) out = cmd_run_on_gluster_pod_or_node(self.node, cmd, gluster_ip) if out != not_found: cmd = ( "python -c \"[" " open('%s/foo_file{0}'.format(i), 'a').close()" " for i in range(%s)" "]\"" % (brick_path, expected_file_amount) ) cmd_run_on_gluster_pod_or_node(self.node, cmd, gluster_ip) passed_arbiter_bricks.append(brick["name"]) # Make sure all the arbiter bricks were checked for brick in bricks_info['arbiter_list']: self.assertIn( brick["name"], passed_arbiter_bricks, "Arbiter brick '%s' was not verified. Looks like it was " "not found on any of gluster PODs/nodes." % brick["name"]) @ddt.data(True, False) def test_aribiter_required_tag_on_node_or_devices_other_disabled( self, node_with_tag): """Validate arbiter vol creation with required node or device tag""" pvc_amount = 3 # Get Heketi nodes info node_id_list = heketi_ops.heketi_node_list( self.heketi_client_node, self.heketi_server_url) # Set arbiter:required tags arbiter_node = heketi_ops.heketi_node_info( self.heketi_client_node, self.heketi_server_url, node_id_list[0], json=True) arbiter_nodes_ip_addresses = arbiter_node['hostnames']['storage'] self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'node', node_id_list[0], ('required' if node_with_tag else None), revert_to=arbiter_node.get('tags', {}).get('arbiter')) for device in arbiter_node['devices']: self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'device', device['id'], (None if node_with_tag else 'required'), revert_to=device.get('tags', {}).get('arbiter')) # Set arbiter:disabled tags data_nodes, data_nodes_ip_addresses = [], [] for node_id in node_id_list[1:]: node_info = heketi_ops.heketi_node_info( self.heketi_client_node, self.heketi_server_url, node_id, json=True) if not any([int(d['storage']['free']) > (pvc_amount * 1024**2) for d in node_info['devices']]): self.skipTest( "Devices are expected to have more than " "%sGb of free space" % pvc_amount) data_nodes_ip_addresses.extend(node_info['hostnames']['storage']) for device in node_info['devices']: self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'device', device['id'], (None if node_with_tag else 'disabled'), revert_to=device.get('tags', {}).get('arbiter')) self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'node', node_id, ('disabled' if node_with_tag else None), revert_to=node_info.get('tags', {}).get('arbiter')) data_nodes.append(node_info) # Create PVCs and check that their bricks are correctly located self.create_storage_class(is_arbiter_vol=True) for i in range(pvc_amount): self.create_and_wait_for_pvc(1) # Get gluster volume info vol_info = get_gluster_vol_info_by_pvc_name( self.node, self.pvc_name) arbiter_bricks, data_bricks = [], [] for brick in vol_info['bricks']['brick']: if int(brick["isArbiter"]) == 1: arbiter_bricks.append(brick["name"]) else: data_bricks.append(brick["name"]) # Verify that all the arbiter bricks are located on # arbiter:required node and data bricks on all other nodes only. for arbiter_brick in arbiter_bricks: self.assertIn( arbiter_brick.split(':')[0], arbiter_nodes_ip_addresses) for data_brick in data_bricks: self.assertIn( data_brick.split(':')[0], data_nodes_ip_addresses) def test_create_delete_pvcs_to_make_gluster_reuse_released_space(self): """Validate reuse of volume space after deletion of PVCs""" min_storage_gb = 10 # Set arbiter:disabled tags to the first 2 nodes data_nodes = [] biggest_disks = [] self.assertGreater(len(self.node_id_list), 2) for node_id in self.node_id_list[0:2]: node_info = heketi_ops.heketi_node_info( self.heketi_client_node, self.heketi_server_url, node_id, json=True) biggest_disk_free_space = 0 for device in node_info['devices']: disk_free_space = int(device['storage']['free']) if disk_free_space < (min_storage_gb * 1024**2): self.skipTest( "Devices are expected to have more than " "%sGb of free space" % min_storage_gb) if disk_free_space > biggest_disk_free_space: biggest_disk_free_space = disk_free_space self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'device', device['id'], 'disabled', revert_to=device.get('tags', {}).get('arbiter')) biggest_disks.append(biggest_disk_free_space) self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'node', node_id, 'disabled', revert_to=node_info.get('tags', {}).get('arbiter')) data_nodes.append(node_info) # Set arbiter:required tag to all other nodes and their devices arbiter_nodes = [] for node_id in self.node_id_list[2:]: node_info = heketi_ops.heketi_node_info( self.heketi_client_node, self.heketi_server_url, node_id, json=True) for device in node_info['devices']: self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'device', device['id'], 'required', revert_to=device.get('tags', {}).get('arbiter')) self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'node', node_id, 'required', revert_to=node_info.get('tags', {}).get('arbiter')) arbiter_nodes.append(node_info) # Calculate size and amount of volumes to be created pvc_size = int(min(biggest_disks) / 1024**2) pvc_amount = max([len(n['devices']) for n in data_nodes]) + 1 # Create sc with gluster arbiter info self.create_storage_class(is_arbiter_vol=True) # Create and delete 3 small volumes concurrently pvc_names = [] for i in range(3): pvc_name = oc_create_pvc( self.node, self.sc_name, pvc_name_prefix='arbiter-pvc', pvc_size=int(pvc_size / 3)) pvc_names.append(pvc_name) exception_exists = False for pvc_name in pvc_names: try: verify_pvc_status_is_bound(self.node, pvc_name) except Exception: for pvc_name in pvc_names: self.addCleanup( wait_for_resource_absence, self.node, 'pvc', pvc_name) for pvc_name in pvc_names: self.addCleanup(oc_delete, self.node, 'pvc', pvc_name) exception_exists = True if exception_exists: raise for pvc_name in pvc_names: oc_delete(self.node, 'pvc', pvc_name) for pvc_name in pvc_names: wait_for_resource_absence(self.node, 'pvc', pvc_name) # Create and delete big volumes in a loop for i in range(pvc_amount): pvc_name = oc_create_pvc( self.node, self.sc_name, pvc_name_prefix='arbiter-pvc', pvc_size=pvc_size) try: verify_pvc_status_is_bound(self.node, pvc_name) except Exception: self.addCleanup( wait_for_resource_absence, self.node, 'pvc', pvc_name) self.addCleanup(oc_delete, self.node, 'pvc', pvc_name) raise oc_delete(self.node, 'pvc', pvc_name) wait_for_resource_absence(self.node, 'pvc', pvc_name) def test_arbiter_volume_expand_using_pvc(self): """Validate arbiter volume expansion by PVC creation""" # Create sc with gluster arbiter info self.create_storage_class( is_arbiter_vol=True, allow_volume_expansion=True) # Create PVC and wait for it to be in 'Bound' state self.create_and_wait_for_pvc() # Get vol info vol_info = get_gluster_vol_info_by_pvc_name(self.node, self.pvc_name) self.verify_amount_and_proportion_of_arbiter_and_data_bricks(vol_info) pvc_size = 2 resize_pvc(self.node, self.pvc_name, pvc_size) verify_pvc_size(self.node, self.pvc_name, pvc_size) vol_info = get_gluster_vol_info_by_pvc_name(self.node, self.pvc_name) self.verify_amount_and_proportion_of_arbiter_and_data_bricks( vol_info, arbiter_bricks=2, data_bricks=4) @ddt.data(True, False) def test_expand_arbiter_volume_setting_tags_on_nodes_or_devices( self, node_tags): """Validate exapnsion of arbiter volume with defferent tags This test case is going to run two tests: 1. If value is True it is going to set tags on nodes and run test 2. If value is False it is going to set tags on devices and run test """ data_nodes = [] arbiter_nodes = [] # set tags arbiter:disabled, arbiter:required for i, node_id in enumerate(self.node_id_list): if node_tags: self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'node', node_id, 'disabled' if i < 2 else 'required') node_info = heketi_ops.heketi_node_info( self.heketi_client_node, self.heketi_server_url, node_id, json=True) if not node_tags: for device in node_info['devices']: self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'device', device['id'], 'disabled' if i < 2 else 'required') device_info = heketi_ops.heketi_device_info( self.heketi_client_node, self.heketi_server_url, device['id'], json=True) self.assertEqual( device_info['tags']['arbiter'], 'disabled' if i < 2 else 'required') node = { 'id': node_id, 'host': node_info['hostnames']['storage'][0]} if node_tags: self.assertEqual( node_info['tags']['arbiter'], 'disabled' if i < 2 else 'required') data_nodes.append(node) if i < 2 else arbiter_nodes.append( node) # Create sc with gluster arbiter info self.create_storage_class( is_arbiter_vol=True, allow_volume_expansion=True) # Create PVC and wait for it to be in 'Bound' state self.create_and_wait_for_pvc() vol_info = get_gluster_vol_info_by_pvc_name(self.node, self.pvc_name) bricks = self.verify_amount_and_proportion_of_arbiter_and_data_bricks( vol_info) arbiter_hosts = [obj['host'] for obj in arbiter_nodes] data_hosts = [obj['host'] for obj in data_nodes] for brick in bricks['arbiter_list']: self.assertIn(brick['name'].split(':')[0], arbiter_hosts) for brick in bricks['data_list']: self.assertIn(brick['name'].split(':')[0], data_hosts) # Expand PVC and verify the size pvc_size = 2 resize_pvc(self.node, self.pvc_name, pvc_size) verify_pvc_size(self.node, self.pvc_name, pvc_size) vol_info = get_gluster_vol_info_by_pvc_name(self.node, self.pvc_name) bricks = self.verify_amount_and_proportion_of_arbiter_and_data_bricks( vol_info, arbiter_bricks=2, data_bricks=4) for brick in bricks['arbiter_list']: self.assertIn(brick['name'].split(':')[0], arbiter_hosts) for brick in bricks['data_list']: self.assertIn(brick['name'].split(':')[0], data_hosts) @ddt.data( (4, '250M', True), (8, '122M', True), (16, '58M', True), (32, '26M', True), (4, '250M', False), (8, '122M', False), (16, '58M', False), (32, '26M', False), ) @ddt.unpack def test_expand_arbiter_volume_according_to_avg_file_size( self, avg_file_size, expected_brick_size, vol_expand=True): """Validate expansion of arbiter volume with diff avg file size""" data_hosts = [] arbiter_hosts = [] # set tags arbiter:disabled, arbiter:required for i, node_id in enumerate(self.node_id_list): self._set_arbiter_tag_with_further_revert( self.heketi_client_node, self.heketi_server_url, 'node', node_id, 'disabled' if i < 2 else 'required') node_info = heketi_ops.heketi_node_info( self.heketi_client_node, self.heketi_server_url, node_id, json=True) (data_hosts.append(node_info['hostnames']['storage'][0]) if i < 2 else arbiter_hosts.append(node_info['hostnames']['storage'][0])) self.assertEqual( node_info['tags']['arbiter'], 'disabled' if i < 2 else 'required') # Create sc with gluster arbiter info self.create_storage_class( is_arbiter_vol=True, allow_volume_expansion=True, arbiter_avg_file_size=avg_file_size) # Create PVC and wait for it to be in 'Bound' state self.create_and_wait_for_pvc() vol_expanded = False for i in range(2): vol_info = get_gluster_vol_info_by_pvc_name( self.node, self.pvc_name) bricks = ( self.verify_amount_and_proportion_of_arbiter_and_data_bricks( vol_info, arbiter_bricks=(2 if vol_expanded else 1), data_bricks=(4 if vol_expanded else 2) ) ) # verify arbiter bricks lies on arbiter hosts for brick in bricks['arbiter_list']: ip, brick_name = brick['name'].split(':') self.assertIn(ip, arbiter_hosts) # verify the size of arbiter brick cmd = "df -h %s --output=size | tail -1" % brick_name out = cmd_run_on_gluster_pod_or_node(self.node, cmd, ip) self.assertEqual(out, expected_brick_size) # verify that data bricks lies on data hosts for brick in bricks['data_list']: self.assertIn(brick['name'].split(':')[0], data_hosts) if vol_expanded or not vol_expand: break # Expand PVC and verify the size pvc_size = 2 resize_pvc(self.node, self.pvc_name, pvc_size) verify_pvc_size(self.node, self.pvc_name, pvc_size) vol_expanded = True