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# vi: ts=4 expandtab
#
# Copyright (C) 2011 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# 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, see <http://www.gnu.org/licenses/>.
import cloudinit.util as util
import subprocess
import os
import stat
import sys
import time
import tempfile
from cloudinit.CloudConfig import per_always
frequency = per_always
def handle(_name, cfg, _cloud, log, args):
if len(args) != 0:
resize_root = False
if str(args[0]).lower() in ['true', '1', 'on', 'yes']:
resize_root = True
else:
resize_root = util.get_cfg_option_str(cfg, "resize_rootfs", True)
if str(resize_root).lower() in ['false', '0']:
return
# we use mktemp rather than mkstemp because early in boot nothing
# else should be able to race us for this, and we need to mknod.
devpth = tempfile.mktemp(prefix="cloudinit.resizefs.", dir="/run")
try:
st_dev = os.stat("/").st_dev
dev = os.makedev(os.major(st_dev), os.minor(st_dev))
os.mknod(devpth, 0400 | stat.S_IFBLK, dev)
except:
if util.is_container():
log.debug("inside container, ignoring mknod failure in resizefs")
return
log.warn("Failed to make device node to resize /")
raise
cmd = ['blkid', '-c', '/dev/null', '-sTYPE', '-ovalue', devpth]
try:
(fstype, _err) = util.subp(cmd)
except subprocess.CalledProcessError as e:
log.warn("Failed to get filesystem type of maj=%s, min=%s via: %s" %
(os.major(st_dev), os.minor(st_dev), cmd))
log.warn("output=%s\nerror=%s\n", e.output[0], e.output[1])
os.unlink(devpth)
raise
if str(fstype).startswith("ext"):
resize_cmd = ['resize2fs', devpth]
elif fstype == "xfs":
resize_cmd = ['xfs_growfs', devpth]
else:
os.unlink(devpth)
log.debug("not resizing unknown filesystem %s" % fstype)
return
if resize_root == "noblock":
fid = os.fork()
if fid == 0:
try:
do_resize(resize_cmd, devpth, log)
os._exit(0) # pylint: disable=W0212
except Exception as exc:
sys.stderr.write("Failed: %s" % exc)
os._exit(1) # pylint: disable=W0212
else:
do_resize(resize_cmd, devpth, log)
log.debug("resizing root filesystem (type=%s, maj=%i, min=%i, val=%s)" %
(str(fstype).rstrip("\n"), os.major(st_dev), os.minor(st_dev),
resize_root))
return
def do_resize(resize_cmd, devpth, log):
try:
start = time.time()
util.subp(resize_cmd)
except subprocess.CalledProcessError as e:
log.warn("Failed to resize filesystem (%s)" % resize_cmd)
log.warn("output=%s\nerror=%s\n", e.output[0], e.output[1])
os.unlink(devpth)
raise
os.unlink(devpth)
log.debug("resize took %s seconds" % (time.time() - start))
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