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#!/usr/bin/env python
# Copyright (C) 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: Module for gluster heal related helper functions.
"""
import time
from glusto.core import Glusto as g
from glustolibs.gluster.volume_ops import get_volume_status
try:
import xml.etree.cElementTree as etree
except ImportError:
import xml.etree.ElementTree as etree
def is_heal_enabled(mnode, volname):
"""Check if heal is enabled for a volume.
Args:
mnode : Node on which commands are executed
volname : Name of the volume
Returns:
bool : True if heal is enabled on volume. False otherwise.
NoneType: None if unable to get the volume status.
"""
enabled = True
vol_status_dict = get_volume_status(mnode, volname, service='shd')
if vol_status_dict is None:
g.log.error("Failed to check if heal is enabled on volume %s or not" %
volname)
return None
for node in vol_status_dict[volname].keys():
if not ('Self-heal Daemon' in vol_status_dict[volname][node]):
enabled = False
return enabled
def is_heal_disabled(mnode, volname):
"""Check if heal is disabled for a volume.
Args:
mnode : Node on which commands are executed
volname : Name of the volume
Returns:
bool : True if heal is diabled on volume. False otherwise.
NoneType: None if unable to get the volume status shd or parse error.
"""
cmd = "gluster volume status %s shd --xml" % volname
ret, out, _ = g.run(mnode, cmd)
if ret != 0:
g.log.error("Failed to get the self-heal-daemon status for the "
"volume" % volname)
return None
try:
root = etree.XML(out)
except etree.ParseError:
g.log.error("Failed to parse the volume status shd xml output.")
return None
operr = root.find("opErrstr")
if operr:
if "Self-heal Daemon is disabled for volume" in operr.text:
return True
return False
def are_all_self_heal_daemons_are_online(mnode, volname):
"""Verifies whether all the self-heal-daemons are online for the specified
volume.
Args:
mnode (str): Node on which cmd has to be executed.
volname (str): volume name
Returns:
bool : True if all the self-heal-daemons are online for the volume.
False otherwise.
NoneType: None if unable to get the volume status
"""
service = 'shd'
failure_msg = ("Verifying all self-heal-daemons are online failed for "
"volume %s" % volname)
# Get volume status
vol_status = get_volume_status(mnode=mnode, volname=volname,
service=service)
if vol_status is None:
g.log.error(failure_msg)
return None
# Get all nodes from pool list
from glustolibs.gluster.peer_ops import nodes_from_pool_list
all_nodes = nodes_from_pool_list(mnode)
if not all_nodes:
g.log.error(failure_msg)
return False
online_status = True
for node in all_nodes:
node_shd_status_value = (vol_status[volname][node]['Self-heal Daemon']
['status'])
if node_shd_status_value != '1':
online_status = False
g.run(mnode, ("gluster volume status %s shd" % volname))
if online_status is True:
g.log.info("All self-heal Daemons are online")
return True
else:
g.log.error("Some of the self-heal Daemons are offline")
return False
def monitor_heal_completion(mnode, volname, timeout_period=1200):
"""Monitors heal completion by looking into .glusterfs/indices/xattrop
directory of every brick for certain time. When there are no entries
in all the brick directories then heal is successful. Otherwise heal is
pending on the volume.
Args:
mnode : Node on which commands are executed
volname : Name of the volume
heal_monitor_timeout : time until which the heal monitoring to be done.
Default: 1200 i.e 20 minutes.
Return:
bool: True if heal is complete within timeout_period. False otherwise
"""
if timeout_period != 0:
heal_monitor_timeout = timeout_period
time_counter = heal_monitor_timeout
g.log.info("The heal monitoring timeout is : %d minutes" %
(heal_monitor_timeout / 60))
# Get all bricks
from glustolibs.gluster.brick_libs import get_all_bricks
bricks_list = get_all_bricks(mnode, volname)
if bricks_list is None:
g.log.error("Unable to get the bricks list. Hence unable to verify "
"whether self-heal-daemon process is running or not "
"on the volume %s" % volname)
return False
while time_counter > 0:
heal_complete = True
for brick in bricks_list:
brick_node, brick_path = brick.split(":")
cmd = ("ls -1 %s/.glusterfs/indices/xattrop/ | "
"grep -ve \"xattrop-\" | wc -l" % brick_path)
ret, out, err = g.run(brick_node, cmd)
if out.strip('\n') != "0":
heal_complete = False
if heal_complete:
break
else:
time.sleep(120)
time_counter = time_counter - 120
if heal_complete:
heal_completion_status = is_heal_complete(mnode, volname)
if heal_completion_status is True:
g.log.info("Heal has successfully completed on volume %s" %
volname)
return True
g.log.info("Heal has not yet completed on volume %s" % volname)
for brick in bricks_list:
brick_node, brick_path = brick.split(":")
cmd = ("ls -1 %s/.glusterfs/indices/xattrop/ " % brick_path)
g.run(brick_node, cmd)
return False
def is_heal_complete(mnode, volname):
"""Verifies there are no pending heals on the volume.
The 'number of entries' in the output of heal info
for all the bricks should be 0 for heal to be completed.
Args:
mnode : Node on which commands are executed
volname : Name of the volume
Return:
bool: True if heal is complete. False otherwise
"""
from glustolibs.gluster.heal_ops import get_heal_info
heal_info_data = get_heal_info(mnode, volname)
if heal_info_data is None:
g.log.error("Unable to verify whether heal is successful or not on "
"volume %s" % volname)
return False
heal_complete = True
for brick_heal_info_data in heal_info_data:
if brick_heal_info_data['numberOfEntries'] != '0':
heal_complete = False
if not heal_complete:
g.log.error("Heal is not complete on some of the bricks for the "
"volume %s" % volname)
return False
g.log.info("Heal is complete on all the bricks for the volume %s" %
volname)
return True
def is_volume_in_split_brain(mnode, volname):
"""Verifies there are no split-brain on the volume.
The 'number of entries' in the output of heal info split-brain
for all the bricks should be 0 for volume not to be in split-brain.
Args:
mnode : Node on which commands are executed
volname : Name of the volume
Return:
bool: True if volume is not in split-brain. False otherwise
"""
from glustolibs.gluster.heal_ops import get_heal_info_split_brain
heal_info_split_brain_data = get_heal_info_split_brain(mnode, volname)
if heal_info_split_brain_data is None:
g.log.error("Unable to verify whether volume %s is not in split-brain "
"or not" % volname)
return False
split_brain = False
for brick_heal_info_split_brain_data in heal_info_split_brain_data:
if brick_heal_info_split_brain_data['numberOfEntries'] == '-':
continue
if brick_heal_info_split_brain_data['numberOfEntries'] != '0':
split_brain = True
if split_brain:
g.log.error("Volume %s is in split-brain state." % volname)
return True
g.log.info("Volume %s is not in split-brain state." % volname)
return False
def get_unhealed_entries_info(volname, mnode=''):
"""Get the information of all gfid's on which heal is pending. The
information includes - stat of gfid, getfattr output for all the dirs/
files for a given gfid
Args:
mnode : Node on which commands are executed
volname : Name of the volume
Return:
bool: True if getting unhealed entries info is successful.
False otherwise
"""
return True
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