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# vi: ts=4 expandtab
#
# Copyright (C) 2011 Canonical Ltd.
#
# Author: Scott Moser <scott.moser@canonical.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 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_bool(cfg,"resize_rootfs",True)
if not resize_root: return
# this really only uses the filename from mktemp, then we mknod into it
(fd, devpth) = tempfile.mkstemp()
os.unlink(devpth)
os.close(fd)
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.islxc():
log.debug("inside lxc, 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
log.debug("resizing root filesystem (type=%s, maj=%i, min=%i)" %
(fstype.rstrip("\n"), os.major(st_dev), os.minor(st_dev)))
if 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
try:
(out,err) = 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)
return
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