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# 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.
import re
from distaf.util import tc
"""
This file contains the gluster brick operations like
add-brick, bring_down_brick replace/remove brick
"""
def add_brick(volname, nbricks, replica=1, stripe=1, peers='', mnode=''):
"""
Does the gluster add-brick. If peer is '', peers from the config
is taken. And replica/stripe will not be used by default.
Returns the output of add-brick command, which would be a tuple of
(retcode, stdout, sstderr) from gluster add-brick command.
"""
global tc
if peers == '':
peers = tc.peers[:]
if mnode == '':
mnode = tc.nodes[0]
replica = int(replica)
stripe = int(stripe)
volinfo = tc.run(mnode, "gluster volume info | egrep \"^Brick[0-9]+\"", \
verbose=False)
if volinfo[0] != 0:
tc.logger.error("Unable to get volinfo for add-brick")
return (-1, -1, -1)
bi = int(re.findall(r"%s_brick([0-9]+)" % volname, volinfo[1])[-1]) + 1
tempn = 0
n = 0
add_bricks = ''
brick_root = "/bricks"
for i in range(bi, bi + nbricks):
sn = len(re.findall(r"%s" % peers[n], volinfo[1])) + tempn
add_bricks = "%s %s:%s/brick%d/%s_brick%d" % (add_bricks, peers[n], \
brick_root, sn, volname, i)
if n < len(peers[:]) - 1:
n = n + 1
else:
n = 0
tempn = tempn + 1
repc = strc = ''
if replica != 1:
repc = "replica %d" % replica
if stripe != 1:
strc = "stripe %d" % stripe
ret = tc.run(mnode, "gluster volume add-brick %s %s %s %s" % \
(volname, repc, strc, add_bricks))
return ret
def bring_down_brick(volname, bindex, node=''):
"""
Kills the glusterfsd process of the particular brick
Returns True on success and False on failure
"""
global tc
if node == '':
node = tc.nodes[0]
ret, rnode, _ = tc.run(node, "gluster volume info %s | egrep \"^Brick%d:\""
" | awk '{print $2}' | awk -F : '{print $1}'"
% (volname, bindex))
if ret != 0:
return False
ret, _, _ = tc.run(rnode.rstrip(), \
"pid=`cat /var/lib/glusterd/vols/%s/run/*%s_brick%d.pid` && kill -15 $pid \
|| kill -9 $pid" % (volname, volname, bindex - 1))
if ret != 0:
return False
else:
return True
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