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| -rw-r--r-- | tests/distaf/distaf_libs/distaflibs-gluster/distaflibs/gluster/tiering_ops.py | 1065 |
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diff --git a/tests/distaf/distaf_libs/distaflibs-gluster/distaflibs/gluster/tiering_ops.py b/tests/distaf/distaf_libs/distaflibs-gluster/distaflibs/gluster/tiering_ops.py new file mode 100644 index 00000000000..96557f9af15 --- /dev/null +++ b/tests/distaf/distaf_libs/distaflibs-gluster/distaflibs/gluster/tiering_ops.py @@ -0,0 +1,1065 @@ +#!/usr/bin/env python +# This file is part of DiSTAF +# Copyright (C) 2015-2016 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. + +""" + Description: Library for gluster tiering operations. +""" + +import re +from distaf.util import tc +import distaflibs.gluster.volume_ops +from distaflibs.gluster.peer_ops import peer_probe_servers +from distaflibs.gluster.gluster_init import start_glusterd +from distaflibs.gluster.lib_utils import list_files + +try: + import xml.etree.cElementTree as etree +except ImportError: + import xml.etree.ElementTree as etree + + +def add_peer_nodes_to_cluster(peers, mnode=None): + """Adds the given peer nodes to cluster + + Args: + peers (list) : list of peer nodes to be attached to cluster + + Kwargs: + mnode (str): Node on which cmd has to be executed. + If None, defaults to servers[0]. + + Returns: + bool: True, if peer nodes are attached to cluster + False, otherwise + + Example: + add_peer_nodes_to_cluster(['peer_node1','peer_node2']) + """ + + if mnode is None: + mnode = tc.servers[0] + + if not isinstance(peers, list): + peers = [peers] + + ret = start_glusterd(servers=peers) + if not ret: + tc.logger.error("glusterd did not start in peer nodes") + return False + + ret = peer_probe_servers(servers=peers, mnode=mnode) + if not ret: + tc.logger.error("Unable to do peer probe on peer machines") + return False + + return True + + +def tier_attach(volname, num_bricks_to_add, peers, replica=1, force=False, + mnode=None): + """Attaches tier to the volume + + Args: + volname (str): volume name + num_bricks_to_add (str): number of bricks to be added as hot tier + peers (list): from these servers, hot tier will be added to volume + + Kwargs: + replica (str): replica count of the hot tier + force (bool): If this option is set to True, then attach tier + will get executed with force option. If it is set to False, + then attach tier will get executed without force option + mnode (str): Node on which cmd has to be executed. + If None, defaults to servers[0]. + + Returns: + tuple: Tuple containing three elements (ret, out, err). + The first element 'ret' is of type 'int' and is the return value + of command execution. + + The second element 'out' is of type 'str' and is the stdout value + of the command execution. + + The third element 'err' is of type 'str' and is the stderr value + of the command execution. + + Example: + tier_attach(testvol, '2', ['peer_node1','peer_node2']) + """ + + if mnode is None: + mnode = tc.servers[0] + + replica = int(replica) + repc = '' + if replica != 1: + repc = "replica %d" % replica + + frce = '' + if force: + frce = 'force' + + # To Do + # For now, assuming brick root path is /bricks in all the servers. + # Later on, this will be made configurable + + brick_root = "/bricks" + volinfo = distaflibs.gluster.volume_ops.get_volume_info(volname, mnode) + bricks_present = volinfo[volname]['bricks'] + _n = 0 + _temp = 0 + _si = len(re.findall(r"%s_tier[0-9]+" % volname, ' '.join(bricks_present))) + add_tier = '' + for i in range(_si, _si + int(num_bricks_to_add)): + sn = (len(re.findall(r"%s" % peers[_n], ' '.join(bricks_present))) + + _temp) + add_tier = ("%s %s:%s/brick%d/%s_tier%d" % + (add_tier, peers[_n], brick_root, sn, volname, i)) + if _n < len(peers) - 1: + _n = _n + 1 + else: + _n = 0 + _temp = _temp + 1 + + cmd = ("gluster volume tier %s attach %s %s %s --mode=script" + % (volname, repc, add_tier, frce)) + return tc.run(mnode, cmd) + + +def tier_start(volname, force=False, mnode=None): + """Starts the tier volume + + Args: + volname (str): volume name + + Kwargs: + force (bool): If this option is set to True, then attach tier + will get executed with force option. If it is set to False, + then attach tier will get executed without force option + mnode (str): Node on which cmd has to be executed. + If None, defaults to servers[0]. + Returns: + tuple: Tuple containing three elements (ret, out, err). + The first element 'ret' is of type 'int' and is the return value + of command execution. + + The second element 'out' is of type 'str' and is the stdout value + of the command execution. + + The third element 'err' is of type 'str' and is the stderr value + of the command execution. + + Example: + tier_start(testvol) + """ + + if mnode is None: + mnode = tc.servers[0] + + frce = '' + if force: + frce = 'force' + + cmd = ("gluster volume tier %s start %s --mode=script" + % (volname, frce)) + return tc.run(mnode, cmd) + + +def tier_status(volname, mnode=None): + """executes tier status command + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which cmd has to be executed. + If None, defaults to servers[0]. + Returns: + tuple: Tuple containing three elements (ret, out, err). + The first element 'ret' is of type 'int' and is the return value + of command execution. + + The second element 'out' is of type 'str' and is the stdout value + of the command execution. + + The third element 'err' is of type 'str' and is the stderr value + of the command execution. + + Example: + tier_status(testvol) + """ + + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s status" % volname + ret = tc.run(mnode, cmd) + + return ret + + +def get_tier_status(volname, mnode=None): + """Parse the output of 'gluster tier status' command. + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which command has to be executed. + If None, defaults to servers[0]. + + Returns: + NoneType: None if command execution fails, parse errors. + dict: dict on success. + + Examples: + >>> get_tier_status(mnode = 'abc.lab.eng.xyz.com') + {'node': [{'promotedFiles': '0', 'demotedFiles': '0', 'nodeName': + 'localhost', 'statusStr': 'in progress'}, {'promotedFiles': '0', + 'demotedFiles': '0', 'nodeName': '10.70.47.16', 'statusStr': + 'in progress'}], 'task-id': '2ed28cbd-4246-493a-87b8-1fdcce313b34', + 'nodeCount': '4', 'op': '7'} + """ + + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s status --xml" % volname + ret, out, _ = tc.run(mnode, cmd, verbose=False) + if ret != 0: + tc.logger.error("Failed to execute 'tier status' on node %s. " + "Hence failed to get tier status.", mnode) + return None + + try: + root = etree.XML(out) + except etree.ParseError: + tc.logger.error("Failed to parse the gluster tier status xml output.") + return None + + tier_status = {} + tier_status["node"] = [] + for info in root.findall("volRebalance"): + for element in info.getchildren(): + if element.tag == "node": + status_info = {} + for elmt in element.getchildren(): + status_info[elmt.tag] = elmt.text + tier_status[element.tag].append(status_info) + else: + tier_status[element.tag] = element.text + return tier_status + + +def tier_detach_start(volname, mnode=None): + """starts detaching tier on given volume + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which cmd has to be executed. + If None, defaults to servers[0]. + + Returns: + tuple: Tuple containing three elements (ret, out, err). + The first element 'ret' is of type 'int' and is the return value + of command execution. + + The second element 'out' is of type 'str' and is the stdout value + of the command execution. + + The third element 'err' is of type 'str' and is the stderr value + of the command execution. + + Example: + tier_detach_start(testvol) + + """ + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s detach start --mode=script" % volname + return tc.run(mnode, cmd) + + +def tier_detach_status(volname, mnode=None): + """executes detach tier status on given volume + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which cmd has to be executed. + If None, defaults to servers[0]. + + Returns: + tuple: Tuple containing three elements (ret, out, err). + The first element 'ret' is of type 'int' and is the return value + of command execution. + + The second element 'out' is of type 'str' and is the stdout value + of the command execution. + + The third element 'err' is of type 'str' and is the stderr value + of the command execution. + + Example: + tier_detach_status(testvol) + + """ + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s detach status --mode=script" % volname + return tc.run(mnode, cmd) + + +def tier_detach_stop(volname, mnode=None): + """stops detaching tier on given volume + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which cmd has to be executed. + If None, defaults to servers[0]. + + Returns: + tuple: Tuple containing three elements (ret, out, err). + The first element 'ret' is of type 'int' and is the return value + of command execution. + + The second element 'out' is of type 'str' and is the stdout value + of the command execution. + + The third element 'err' is of type 'str' and is the stderr value + of the command execution. + + Example: + tier_detach_stop(testvol) + + """ + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s detach stop --mode=script" % volname + return tc.run(mnode, cmd) + + +def tier_detach_commit(volname, mnode=None): + """commits detach tier on given volume + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which cmd has to be executed. + If None, defaults to servers[0]. + + Returns: + tuple: Tuple containing three elements (ret, out, err). + The first element 'ret' is of type 'int' and is the return value + of command execution. + + The second element 'out' is of type 'str' and is the stdout value + of the command execution. + + The third element 'err' is of type 'str' and is the stderr value + of the command execution. + + Example: + tier_detach_commit(testvol) + + """ + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s detach commit --mode=script" % volname + return tc.run(mnode, cmd) + + +def tier_detach_force(volname, mnode=None): + """detaches tier forcefully on given volume + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which cmd has to be executed. + If None, defaults to servers[0]. + + Returns: + tuple: Tuple containing three elements (ret, out, err). + The first element 'ret' is of type 'int' and is the return value + of command execution. + + The second element 'out' is of type 'str' and is the stdout value + of the command execution. + + The third element 'err' is of type 'str' and is the stderr value + of the command execution. + + Example: + tier_detach_force(testvol) + + """ + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s detach force --mode=script" % volname + return tc.run(mnode, cmd) + + +def get_detach_tier_status(volname, mnode=None): + """Parse the output of 'gluster volume tier detach status' command. + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which command has to be executed. + If None, defaults to servers[0]. + + Returns: + NoneType: None if command execution fails, parse errors. + dict: dict on success. + + Examples: + >>> get_detach_tier_status("testvol", mnode = 'abc.lab.eng.xyz.com') + {'node': [{'files': '0', 'status': '3', 'lookups': '1', 'skipped': '0', + 'nodeName': 'localhost', 'failures': '0', 'runtime': '0.00', 'id': + '11336017-9561-4e88-9ac3-a94d4b403340', 'statusStr': 'completed', + 'size': '0'}, {'files': '0', 'status': '3', 'lookups': '0', 'skipped': + '0', 'nodeName': '10.70.47.16', 'failures': '0', 'runtime': '0.00', + 'id': 'a2b88b10-eba2-4f97-add2-8dc37df08b27', 'statusStr': 'completed', + 'size': '0'}], 'nodeCount': '4', 'aggregate': {'files': '0', 'status': + '3', 'lookups': '1', 'skipped': '0', 'failures': '0', 'runtime': '0.0', + 'statusStr': 'completed', 'size': '0'}} + """ + + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s detach status --xml" % volname + ret, out, _ = tc.run(mnode, cmd, verbose=False) + if ret != 0: + tc.logger.error("Failed to execute 'detach tier status' on node %s. " + "Hence failed to get detach tier status.", mnode) + return None + + try: + root = etree.XML(out) + except etree.ParseError: + tc.logger.error("Failed to parse the detach tier status xml output.") + return None + + tier_status = {} + tier_status["node"] = [] + for info in root.findall("volDetachTier"): + for element in info.getchildren(): + if element.tag == "node": + status_info = {} + for elmt in element.getchildren(): + status_info[elmt.tag] = elmt.text + tier_status[element.tag].append(status_info) + elif element.tag == "aggregate": + status_info = {} + for elmt in element.getchildren(): + status_info[elmt.tag] = elmt.text + tier_status[element.tag] = status_info + else: + tier_status[element.tag] = element.text + return tier_status + + +def tier_detach_start_and_get_taskid(volname, mnode=None): + """Parse the output of 'gluster volume tier detach start' command. + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which command has to be executed. + If None, defaults to servers[0]. + + Returns: + NoneType: None if command execution fails, parse errors. + dict: dict on success. + + Examples: + >>> tier_detach_start_and_get_taskid("testvol", + mnode = 'abc.lab.eng.xyz.com') + {'task-id': '8020835c-ff0d-4ea1-9f07-62dd067e92d4'} + """ + + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s detach start --xml" % volname + ret, out, _ = tc.run(mnode, cmd, verbose=False) + if ret != 0: + tc.logger.error("Failed to execute 'detach tier start' on node %s. " + "Hence failed to parse the detach tier start.", mnode) + return None + + try: + root = etree.XML(out) + except etree.ParseError: + tc.logger.error("Failed to parse the gluster detach tier " + "start xml output.") + return None + + tier_status = {} + for info in root.findall("volDetachTier"): + for element in info.getchildren(): + tier_status[element.tag] = element.text + return tier_status + + +def tier_detach_stop_and_get_status(volname, mnode=None): + """Parse the output of 'gluster volume tier detach stop' command. + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which command has to be executed. + If None, defaults to servers[0]. + + Returns: + NoneType: None if command execution fails, parse errors. + dict: dict on success. + + Examples: + >>> tier_detach_stop_and_get_status("testvol", + mnode = 'abc.lab.eng.xyz.com') + {'node': [{'files': '0', 'status': '3', 'lookups': '1', 'skipped': '0', + 'nodeName': 'localhost', 'failures': '0', 'runtime': '0.00', 'id': + '11336017-9561-4e88-9ac3-a94d4b403340', 'statusStr': 'completed', + 'size': '0'}, {'files': '0', 'status': '3', 'lookups': '0', 'skipped': + '0', 'nodeName': '10.70.47.16', 'failures': '0', 'runtime': '0.00', + 'id': 'a2b88b12-eba2-4f97-add2-8dc37df08b27', 'statusStr': 'completed', + 'size': '0'}], 'nodeCount': '4', 'aggregate': {'files': '0', 'status': + '3', 'lookups': '1', 'skipped': '0', 'failures': '0', 'runtime': '0.0', + 'statusStr': 'completed', 'size': '0'}} + """ + + if mnode is None: + mnode = tc.servers[0] + + cmd = "gluster volume tier %s detach stop --xml" % volname + ret, out, _ = tc.run(mnode, cmd, verbose=False) + if ret != 0: + tc.logger.error("Failed to execute 'tier start' on node %s. " + "Hence failed to parse the tier start.", mnode) + return None + + try: + root = etree.XML(out) + except etree.ParseError: + tc.logger.error("Failed to parse the gluster detach tier stop" + " xml output.") + return None + + tier_status = {} + tier_status["node"] = [] + for info in root.findall("volDetachTier"): + for element in info.getchildren(): + if element.tag == "node": + status_info = {} + for elmt in element.getchildren(): + status_info[elmt.tag] = elmt.text + tier_status[element.tag].append(status_info) + elif element.tag == "aggregate": + status_info = {} + for elmt in element.getchildren(): + status_info[elmt.tag] = elmt.text + tier_status[element.tag] = status_info + else: + tier_status[element.tag] = element.text + return tier_status + + +def wait_for_detach_tier_to_complete(volname, mnode=None, timeout=300): + """Waits for the detach tier to complete + + Args: + volname (str): volume name + + Kwargs: + mnode (str): Node on which command has to be executed. + If None, defaults to servers[0]. + timeout (int): timeout value to wait for detach tier to complete + + Returns: + True on success, False otherwise + + Examples: + >>> wait_for_detach_tier_to_complete("testvol") + """ + + if mnode is None: + mnode = tc.servers[0] + + count = 0 + flag = 0 + while (count < timeout): + status_info = get_detach_tier_status(volname, mnode=mnode) + if status_info is None: + return False + + status = status_info['aggregate']['statusStr'] + if status == 'completed': + flag = 1 + break + + time.sleep(10) + count = count + 10 + if not flag: + tc.logger.error("detach tier is not completed") + return False + else: + tc.logger.info("detach tier is successfully completed") + return True + + +def get_files_from_hot_tier(volname): + """Lists files from hot tier for the given volume + + Args: + volname (str): volume name + + Returns: + Emptylist: if there are no files in hot tier. + list: list of files in hot tier on success. + + Examples: + >>>get_files_from_hot_tier("testvol") + """ + + files = [] + subvols = distaflibs.gluster.volume_ops.get_subvols(volname) + for subvol in subvols['hot_tier_subvols']: + info = subvol[0].split(':') + file_list = list_files(info[1], server=info[0]) + for file in file_list: + if ".glusterfs" not in file: + files.append(file) + + return files + + +def get_files_from_cold_tier(volname): + """Lists files from cold tier for the given volume + + Args: + volname (str): volume name + + Returns: + Emptylist: if there are no files in cold tier. + list: list of files in cold tier on success. + + Examples: + >>>get_files_from_hot_tier("testvol") + """ + + files = [] + subvols = distaflibs.gluster.volume_ops.get_subvols(volname) + for subvol in subvols['cold_tier_subvols']: + info = subvol[0].split(':') + file_list = list_files(info[1], server=info[0]) + for file in file_list: + if ".glusterfs" not in file: + files.append(file) + + return files + + +def get_tier_promote_frequency(volname): + """Gets tier promote frequency value for given volume. + + Args: + volname (str): volume name + + Returns: + NoneType: None if command execution fails, parse errors. + str: promote frequency value on success. + + Examples: + >>>get_tier_promote_frequency("testvol") + """ + + vol_options = distaflibs.gluster.volume_ops.get_volume_option(volname) + if vol_options is None: + tc.logger.error("Failed to get volume options") + return None + + return vol_options['cluster.tier-promote-frequency'] + + +def get_tier_demote_frequency(volname): + """Gets tier demote frequency value for given volume. + + Args: + volname (str): volume name + + Returns: + NoneType: None if command execution fails, parse errors. + str: demote frequency value on success. + + Examples: + >>>get_tier_demote_frequency("testvol") + """ + + vol_options = distaflibs.gluster.volume_ops.get_volume_option(volname) + if vol_options is None: + tc.logger.error("Failed to get volume options") + return None + + return vol_options['cluster.tier-demote-frequency'] + + +def get_tier_mode(volname): + """Gets tier mode for given volume. + + Args: + volname (str): volume name + + Returns: + NoneType: None if command execution fails, parse errors. + str: tier mode on success. + + Examples: + >>>get_tier_mode("testvol") + """ + + vol_options = distaflibs.gluster.volume_ops.get_volume_option(volname) + if vol_options is None: + tc.logger.error("Failed to get volume options") + return None + + return vol_options['cluster.tier-mode'] + + +def get_tier_max_mb(volname): + """Gets tier max mb for given volume. + + Args: + volname (str): volume name + + Returns: + NoneType: None if command execution fails, parse errors. + str: tier max mb on success. + + Examples: + >>>get_tier_max_mb("testvol") + """ + + vol_options = distaflibs.gluster.volume_ops.get_volume_option(volname) + if vol_options is None: + tc.logger.error("Failed to get volume options") + return None + + return vol_options['cluster.tier-max-mb'] + + +def get_tier_max_files(volname): + """Gets tier max files for given volume. + + Args: + volname (str): volume name + + Returns: + NoneType: None if command execution fails, parse errors. + str: tier max files on success. + + Examples: + >>>get_tier_max_files("testvol") + """ + + vol_options = distaflibs.gluster.volume_ops.get_volume_option(volname) + if vol_options is None: + tc.logger.error("Failed to get volume options") + return None + + return vol_options['cluster.tier-max-files'] + + +def get_tier_watermark_high_limit(volname): + """Gets tier watermark high limit for given volume. + + Args: + volname (str): volume name + + Returns: + NoneType: None if command execution fails, parse errors. + str: tier watermark high limit on success. + + Examples: + >>>get_tier_watermark_high_limit("testvol") + """ + + vol_options = distaflibs.gluster.volume_ops.get_volume_option(volname) + if vol_options is None: + tc.logger.error("Failed to get volume options") + return None + + return vol_options['cluster.watermark-hi'] + + +def get_tier_watermark_low_limit(volname): + """Gets tier watermark low limit for given volume. + + Args: + volname (str): volume name + + Returns: + NoneType: None if command execution fails, parse errors. + str: tier watermark low limit on success. + + Examples: + >>>get_tier_watermark_low_limit("testvol") + """ + + vol_options = distaflibs.gluster.volume_ops.get_volume_option(volname) + if vol_options is None: + tc.logger.error("Failed to get volume options") + return None + + return vol_options['cluster.watermark-low'] + + +def set_tier_promote_frequency(volname, value): + """Sets tier promote frequency value for given volume. + + Args: + volname (str): volume name + value (str): promote frequency value + + Returns: + bool: True on success, False Otherwise + + Examples: + >>>set_tier_promote_frequency("testvol", '1000') + """ + + option = {'cluster.tier-promote-frequency': value} + + if not distaflibs.gluster.volume_ops.set_volume_option(volname, + options=option): + tc.logger.error("Failed to set promote frequency to %s" + % value) + return False + + return True + + +def set_tier_demote_frequency(volname, value): + """Sets tier demote frequency value for given volume. + + Args: + volname (str): volume name + value (str): demote frequency value + + Returns: + bool: True on success, False Otherwise + + Examples: + >>>set_tier_demote_frequency("testvol", "500") + """ + + option = {'cluster.tier-demote-frequency': value} + + if not distaflibs.gluster.volume_ops.set_volume_option(volname, + options=option): + tc.logger.error("Failed to set demote frequency to %s" + % value) + return False + + return True + + +def set_tier_mode(volname, value): + """Sets tier mode for given volume. + + Args: + volname (str): volume name + value (str): tier mode value + + Returns: + bool: True on success, False Otherwise + + Examples: + >>>set_tier_mode("testvol", "cache") + """ + + option = {'cluster.tier-mode': value} + + if not distaflibs.gluster.volume_ops.set_volume_option(volname, + options=option): + tc.logger.error("Failed to set tier mode to %s" + % value) + return False + + return True + + +def set_tier_max_mb(volname, value): + """Sets tier max mb for given volume. + + Args: + volname (str): volume name + value (str): tier mode value + + Returns: + bool: True on success, False Otherwise + + Examples: + >>>set_tier_max_mb("testvol", "50") + """ + + option = {'cluster.tier-max-mb': value} + + if not distaflibs.gluster.volume_ops.set_volume_option(volname, + options=option): + tc.logger.error("Failed to set tier max mb to %s" + % value) + return False + + return True + + +def set_tier_max_files(volname, value): + """Sets tier max files for given volume. + + Args: + volname (str): volume name + value (str): tier mode value + + Returns: + bool: True on success, False Otherwise + + Examples: + >>>set_tier_max_files("testvol", "10") + """ + + option = {'cluster.tier-max-files': value} + + if not distaflibs.gluster.volume_ops.set_volume_option(volname, + options=option): + tc.logger.error("Failed to set tier max files to %s" + % value) + return False + + return True + + +def set_tier_watermark_high_limit(volname, value): + """Sets tier watermark high limit for given volume. + + Args: + volname (str): volume name + value (str): tier mode value + + Returns: + bool: True on success, False Otherwise + + Examples: + >>>set_tier_watermark_high_limit("testvol", "95") + """ + + option = {'cluster.watermark-hi': value} + + if not distaflibs.gluster.volume_ops.set_volume_option(volname, + options=option): + tc.logger.error("Failed to set tier watermark high limit to %s" + % value) + return False + + return True + + +def set_tier_watermark_low_limit(volname, value): + """Sets tier watermark low limit for given volume. + + Args: + volname (str): volume name + value (str): tier mode value + + Returns: + bool: True on success, False Otherwise + + Examples: + >>>set_tier_watermark_low_limit("testvol", "40") + """ + + option = {'cluster.watermark-low': value} + + if not distaflibs.gluster.volume_ops.set_volume_option(volname, + options=option): + tc.logger.error("Failed to set tier watermark low limit to %s" + % value) + return False + + return True + + +def get_tier_pid(volname, mnode): + """Gets tier pid for given volume. + + Args: + volname (str): volume name + mnode (str): Node on which command has to be executed. + + Returns: + NoneType: None if command execution fails, parse errors. + str: pid of tier process on success. + + Examples: + >>>get_tier_pid("testvol", "abc.xyz.com") + """ + + cmd = ("ps -ef | grep -v grep | grep '/var/log/glusterfs/%s-tier.log' |" + "awk '{print $2}'" % volname) + ret, out, err = tc.run(mnode, cmd) + if ret != 0: + tc.logger.error("Failed to execute 'ps' cmd") + return None + + return out.strip("\n") + + +def is_tier_process_running(volname, mnode): + """Checks whether tier process is running + + Args: + volname (str): volume name + mnode (str): Node on which command has to be executed. + + Returns: + True on success, False otherwise + + Examples: + >>>is_tier_process_running("testvol", "abc.xyz.com") + """ + + pid = get_tier_pid(volname, mnode) + if pid == '': + return False + return True |