def maybe_get_writable_device_path(devpath, info, log):
"""Return updated devpath if the devpath is a writable block device.
@param devpath: Requested path to the root device we want to resize.
@param info: String representing information about the requested device.
@param log: Logger to which logs will be added upon error.
@returns devpath or updated devpath per kernel commandline if the device
path is a writable block device, returns None otherwise.
"""
container = util.is_container()
# Ensure the path is a block device.
if (devpath == "/dev/root" and not os.path.exists(devpath)
and not container):
devpath = util.rootdev_from_cmdline(util.get_cmdline())
if devpath is None:
log.warn("Unable to find device '/dev/root'")
return None
log.debug("Converted /dev/root to '%s' per kernel cmdline", devpath)
if devpath == 'overlayroot':
log.debug("Not attempting to resize devpath '%s': %s", devpath, info)
return None
# FreeBSD zpool can also just use gpt/<label>
# with that in mind we can not do an os.stat on "gpt/whatever"
# therefore return the devpath already here.
if devpath.startswith('gpt/'):
log.debug('We have a gpt label - just go ahead')
return devpath
try:
statret = os.stat(devpath)
except OSError as exc:
if container and exc.errno == errno.ENOENT:
log.debug(
"Device '%s' did not exist in container. "
"cannot resize: %s", devpath, info)
elif exc.errno == errno.ENOENT:
log.warn("Device '%s' did not exist. cannot resize: %s", devpath,
info)
else:
raise exc
return None
if not stat.S_ISBLK(statret.st_mode) and not stat.S_ISCHR(statret.st_mode):
if container:
log.debug("device '%s' not a block device in container."
" cannot resize: %s" % (devpath, info))
else:
log.warn("device '%s' not a block device. cannot resize: %s" %
(devpath, info))
return None
return devpath # The writable block devpath
def devent2dev(devent):
if devent.startswith("/dev/"):
return devent
else:
result = util.get_mount_info(devent)
if not result:
raise ValueError("Could not determine device of '%s' % dev_ent")
dev = result[0]
container = util.is_container()
# Ensure the path is a block device.
if (dev == "/dev/root" and not os.path.exists(dev) and not container):
dev = util.rootdev_from_cmdline(util.get_cmdline())
if dev is None:
raise ValueError("Unable to find device '/dev/root'")
return dev
def devent2dev(devent):
if devent.startswith("/dev/"):
return devent
else:
result = util.get_mount_info(devent)
if not result:
raise ValueError("Could not determine device of '%s' % dev_ent")
dev = result[0]
container = util.is_container()
# Ensure the path is a block device.
if dev == "/dev/root" and not container:
dev = util.rootdev_from_cmdline(util.get_cmdline())
if dev is None:
if os.path.exists(dev):
# if /dev/root exists, but we failed to convert
# that to a "real" /dev/ path device, then return it.
return dev
raise ValueError("Unable to find device '/dev/root'")
return dev
def devent2dev(devent):
if devent.startswith("/dev/"):
return devent
else:
result = util.get_mount_info(devent)
if not result:
raise ValueError("Could not determine device of '%s' % dev_ent")
dev = result[0]
container = util.is_container()
# Ensure the path is a block device.
if (dev == "/dev/root" and not container):
dev = util.rootdev_from_cmdline(util.get_cmdline())
if dev is None:
if os.path.exists(dev):
# if /dev/root exists, but we failed to convert
# that to a "real" /dev/ path device, then return it.
return dev
raise ValueError("Unable to find device '/dev/root'")
return dev
def handle(name, cfg, _cloud, log, args):
if len(args) != 0:
resize_root = args[0]
else:
resize_root = util.get_cfg_option_str(cfg, "resize_rootfs", True)
if not util.translate_bool(resize_root, addons=[NOBLOCK]):
log.debug("Skipping module named %s, resizing disabled", name)
return
# TODO(harlowja) is the directory ok to be used??
resize_root_d = util.get_cfg_option_str(cfg, "resize_rootfs_tmp", "/run")
util.ensure_dir(resize_root_d)
# TODO(harlowja): allow what is to be resized to be configurable??
resize_what = "/"
result = util.get_mount_info(resize_what, log)
if not result:
log.warn("Could not determine filesystem type of %s", resize_what)
return
(devpth, fs_type, mount_point) = result
info = "dev=%s mnt_point=%s path=%s" % (devpth, mount_point, resize_what)
log.debug("resize_info: %s" % info)
container = util.is_container()
# Ensure the path is a block device.
if (devpth == "/dev/root" and not os.path.exists(devpth)
and not container):
devpth = util.rootdev_from_cmdline(util.get_cmdline())
if devpth is None:
log.warn("Unable to find device '/dev/root'")
return
log.debug("Converted /dev/root to '%s' per kernel cmdline", devpth)
try:
statret = os.stat(devpth)
except OSError as exc:
if container and exc.errno == errno.ENOENT:
log.debug(
"Device '%s' did not exist in container. "
"cannot resize: %s", devpth, info)
elif exc.errno == errno.ENOENT:
log.warn("Device '%s' did not exist. cannot resize: %s", devpth,
info)
else:
raise exc
return
if not os.access(devpth, os.W_OK):
if container:
log.debug("'%s' not writable in container. cannot resize: %s",
devpth, info)
else:
log.warn("'%s' not writable. cannot resize: %s", devpth, info)
return
if not stat.S_ISBLK(statret.st_mode) and not stat.S_ISCHR(statret.st_mode):
if container:
log.debug("device '%s' not a block device in container."
" cannot resize: %s" % (devpth, info))
else:
log.warn("device '%s' not a block device. cannot resize: %s" %
(devpth, info))
return
resizer = None
if can_skip_resize(fs_type, resize_what, devpth):
log.debug("Skip resize filesystem type %s for %s", fs_type,
resize_what)
return
fstype_lc = fs_type.lower()
for (pfix, root_cmd) in RESIZE_FS_PREFIXES_CMDS:
if fstype_lc.startswith(pfix):
resizer = root_cmd
break
if not resizer:
log.warn("Not resizing unknown filesystem type %s for %s", fs_type,
resize_what)
return
resize_cmd = resizer(resize_what, devpth)
log.debug("Resizing %s (%s) using %s", resize_what, fs_type,
' '.join(resize_cmd))
if resize_root == NOBLOCK:
# Fork to a child that will run
# the resize command
util.fork_cb(util.log_time,
logfunc=log.debug,
msg="backgrounded Resizing",
func=do_resize,
args=(resize_cmd, log))
else:
util.log_time(logfunc=log.debug,
msg="Resizing",
func=do_resize,
args=(resize_cmd, log))
action = 'Resized'
if resize_root == NOBLOCK:
action = 'Resizing (via forking)'
log.debug("%s root filesystem (type=%s, val=%s)", action, fs_type,
resize_root)
def maybe_get_writable_device_path(devpath, info, log):
"""Return updated devpath if the devpath is a writable block device.
@param devpath: Requested path to the root device we want to resize.
@param info: String representing information about the requested device.
@param log: Logger to which logs will be added upon error.
@returns devpath or updated devpath per kernel commandline if the device
path is a writable block device, returns None otherwise.
"""
container = util.is_container()
# Ensure the path is a block device.
if (devpath == "/dev/root" and not os.path.exists(devpath) and
not container):
devpath = util.rootdev_from_cmdline(util.get_cmdline())
if devpath is None:
log.warn("Unable to find device '/dev/root'")
return None
log.debug("Converted /dev/root to '%s' per kernel cmdline", devpath)
if devpath == 'overlayroot':
log.debug("Not attempting to resize devpath '%s': %s", devpath, info)
return None
# FreeBSD zpool can also just use gpt/<label>
# with that in mind we can not do an os.stat on "gpt/whatever"
# therefore return the devpath already here.
if devpath.startswith('gpt/'):
log.debug('We have a gpt label - just go ahead')
return devpath
# Alternatively, our device could simply be a name as returned by gpart,
# such as da0p3
if not devpath.startswith('/dev/') and not os.path.exists(devpath):
fulldevpath = '/dev/' + devpath.lstrip('/')
log.debug("'%s' doesn't appear to be a valid device path. Trying '%s'",
devpath, fulldevpath)
devpath = fulldevpath
try:
statret = os.stat(devpath)
except OSError as exc:
if container and exc.errno == errno.ENOENT:
log.debug("Device '%s' did not exist in container. "
"cannot resize: %s", devpath, info)
elif exc.errno == errno.ENOENT:
log.warn("Device '%s' did not exist. cannot resize: %s",
devpath, info)
else:
raise exc
return None
if not stat.S_ISBLK(statret.st_mode) and not stat.S_ISCHR(statret.st_mode):
if container:
log.debug("device '%s' not a block device in container."
" cannot resize: %s" % (devpath, info))
else:
log.warn("device '%s' not a block device. cannot resize: %s" %
(devpath, info))
return None
return devpath # The writable block devpath
