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#!/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 peer operations.
"""
import re
import time
from distaf.util import tc
def peer_probe(pnode='', servers='', timeout=10):
"""
Does peer probe and validates the same
Returns True on success and False on failure
Note: Input for parameter 'servers' should be in list format
"""
if pnode == '':
pnode = tc.nodes[0]
if servers == '':
servers = tc.nodes[1:]
nodes_pool_list = nodes_from_pool_list(pnode)
if not nodes_pool_list:
return False
for server in servers:
if server not in nodes_pool_list:
ret = tc.run(pnode, "gluster peer probe %s" % server)
if ret[0] != 0 or \
re.search(r'^peer\sprobe\:\ssuccess(.*)', ret[1]) is None:
tc.logger.error("Failed to do peer probe for node %s" % server)
return False
time.sleep(timeout)
#Validating whether peer probe is successful
if not validate_peer_status(pnode, servers):
tc.logger.error("peer probe validation failed")
return False
return True
def peer_detach(pnode='', servers='', force=False, timeout=10):
"""
Does peer detach and validates the same
Returns True on success and False on failure
Note: Input for parameter 'servers' should be in list format
"""
if pnode == '':
pnode = tc.nodes[0]
if servers == '':
servers = tc.nodes[1:]
for server in servers:
if force:
cmd = "gluster peer detach %s force" % server
else:
cmd = "gluster peer detach %s" % server
ret = tc.run(pnode, cmd)
if ret[0] != 0 or re.search(r'^peer\sdetach\:\ssuccess(.*)', ret[1]) \
is None:
tc.logger.error("Failed to do peer detach for node %s" % server)
return False
time.sleep(timeout)
#Validating whether peer detach is successful
if validate_peer_status(pnode, servers):
tc.logger.error("peer detach validatiom failed")
return False
return True
def peer_status(pnode=''):
"""
Does peer status on the given node
Returns: On success, peer status information in list of dicts
If there is only one peer, then an empty list is sent
On failure, None
"""
if pnode == '':
pnode = tc.nodes[0]
ret = tc.run(pnode, "gluster peer status")
if ret[0] != 0:
tc.logger.error("Failed to execute peer status command in node %s" \
% pnode)
return None
status_list = ret[1].strip().split('\n')
if "Number of Peers: 0" == status_list[0] and len(status_list) == 1:
tc.logger.debug("Only one server in the cluster")
return status_list[1:]
status_list = status_list[1:]
peer_list = []
for status in status_list:
stat = [stat for stat in status.split('\n') if stat != '']
temp_dict = {}
for element in stat:
elmt = element.split(':')
temp_dict[elmt[0].strip()] = elmt[1].strip()
peer_list.append(temp_dict)
return peer_list
def validate_peer_status(pnode='', servers=''):
"""
Checks whether peer probe succeeds using peer status command
Returns True on success and False on failure
Note: Input for parameter 'servers' should be in list format
"""
if pnode == '':
pnode = tc.nodes[0]
if servers == '':
servers = tc.nodes[1:]
check_flag = False
status = peer_status(pnode)
if status == []:
return True
if status == None:
return False
for stat in status:
if stat['Hostname'] in servers:
if re.match(r'([0-9a-f]{8})(?:-[0-9a-f]{4}){3}-[0-9a-f]{12}', \
stat['Uuid'], re.I) is None or \
stat['State'] != "Peer in Cluster (Connected)":
tc.logger.error("peer probe unsuccessful for node %s" % \
stat['Hostname'])
check_flag = True
if check_flag or not len(set(servers).intersection([stat_key['Hostname'] \
for stat_key in status])):
return False
return True
def pool_list(pnode=''):
"""
Does pool list on the given node
Returns: On success, pool list information in list of dictionary format
On Failure, None
"""
if pnode == '':
pnode = tc.nodes[0]
ret = tc.run(pnode, "gluster pool list")
if ret[0] != 0:
tc.logger.error("Failed to execute pool list in node %s" % pnode)
return None
pool_info = []
for index, item in enumerate(ret[1].split('\n')[:-1]):
match = re.search(r'(\S+)\s*\t*\s*(\S+)\s*\t*\s*(\S+)\s*', item)
if match is not None:
if index == 0:
keys = match.groups()
else:
temp_dict = {}
for num, element in enumerate(match.groups()):
temp_dict[keys[num]] = element
pool_info.append(temp_dict)
return pool_info
def nodes_from_pool_list(pnode=''):
"""
Runs the "gluster pool list" on the specified server
and returns a list of servers from the pool list
Returns False on failure and list of servers on success
"""
if pnode == '':
pnode = tc.nodes[0]
servers = []
nodes_from_pool = pool_list(pnode)
if not nodes_from_pool:
return False
for server in nodes_from_pool:
if server.get('Hostname') == "localhost":
servers.insert(0, pnode)
else:
servers.append(server.get("Hostname"))
return servers
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