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# Copyright (C) 2012 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.DataSource as DataSource
from cloudinit import seeddir as base_seeddir
from cloudinit import log
import cloudinit.util as util
import os.path
import os
import json
import subprocess
DEFAULT_IID = "iid-dsconfigdrive"
class DataSourceConfigDrive(DataSource.DataSource):
seed = None
seeddir = base_seeddir + '/config_drive'
cfg = {}
userdata_raw = None
metadata = None
dsmode = "local"
def __str__(self):
mstr = "DataSourceConfigDrive[%s]" % self.dsmode
mstr = mstr + " [seed=%s]" % self.seed
return(mstr)
def get_data(self):
found = None
md = {}
ud = ""
defaults = {"instance-id": DEFAULT_IID, "dsmode": "pass"}
if os.path.isdir(self.seeddir):
try:
(md, ud) = read_config_drive_dir(self.seeddir)
found = self.seeddir
except nonConfigDriveDir:
pass
if not found:
dev = cfg_drive_device()
if dev:
try:
(md, ud) = util.mount_callback_umount(dev,
read_config_drive_dir)
found = dev
except (nonConfigDriveDir, util.mountFailedError):
pass
if not found:
return False
if 'dsconfig' in md:
self.cfg = md['dscfg']
md = util.mergedict(md, defaults)
# update interfaces and ifup only on the local datasource
# this way the DataSourceConfigDriveNet doesn't do it also.
if 'network-interfaces' in md and self.dsmode == "local":
if md['dsmode'] == "pass":
log.info("updating network interfaces from configdrive")
else:
log.debug("updating network interfaces from configdrive")
util.write_file("/etc/network/interfaces",
md['network-interfaces'])
try:
(out, err) = util.subp(['ifup', '--all'])
if len(out) or len(err):
log.warn("ifup --all had stderr: %s" % err)
except subprocess.CalledProcessError as exc:
log.warn("ifup --all failed: %s" % (exc.output[1]))
self.seed = found
self.metadata = md
self.userdata_raw = ud
if md['dsmode'] == self.dsmode:
return True
log.debug("%s: not claiming datasource, dsmode=%s" %
(self, md['dsmode']))
return False
def get_public_ssh_keys(self):
if not 'public-keys' in self.metadata:
return([])
return(self.metadata['public-keys'])
# the data sources' config_obj is a cloud-config formated
# object that came to it from ways other than cloud-config
# because cloud-config content would be handled elsewhere
def get_config_obj(self):
return(self.cfg)
class DataSourceConfigDriveNet(DataSourceConfigDrive):
dsmode = "net"
class nonConfigDriveDir(Exception):
pass
def cfg_drive_device():
""" get the config drive device. return a string like '/dev/vdb'
or None (if there is no non-root device attached). This does not
check the contents, only reports that if there *were* a config_drive
attached, it would be this device.
per config_drive documentation, this is
"associated as the last available disk on the instance"
"""
if 'CLOUD_INIT_CONFIG_DRIVE_DEVICE' in os.environ:
return(os.environ['CLOUD_INIT_CONFIG_DRIVE_DEVICE'])
# we are looking for a raw block device (sda, not sda1) with a vfat
# filesystem on it.
letters = "abcdefghijklmnopqrstuvwxyz"
devs = util.find_devs_with("TYPE=vfat")
# filter out anything not ending in a letter (ignore partitions)
devs = [f for f in devs if f[-1] in letters]
# sort them in reverse so "last" device is first
devs.sort(reverse=True)
if len(devs):
return(devs[0])
return(None)
def read_config_drive_dir(source_dir):
"""
read_config_drive_dir(source_dir):
read source_dir, and return a tuple with metadata dict and user-data
string populated. If not a valid dir, raise a nonConfigDriveDir
"""
md = {}
ud = ""
flist = ("etc/network/interfaces", "root/.ssh/authorized_keys", "meta.js")
found = [f for f in flist if os.path.isfile("%s/%s" % (source_dir, f))]
if len(found) == 0:
raise nonConfigDriveDir("%s: %s" % (source_dir, "no files found"))
if "etc/network/interfaces" in found:
with open("%s/%s" % (source_dir, "/etc/network/interfaces")) as fp:
md['network-interfaces'] = fp.read()
if "root/.ssh/authorized_keys" in found:
with open("%s/%s" % (source_dir, "root/.ssh/authorized_keys")) as fp:
content = fp.read()
lines = content.splitlines()
keys = [l for l in lines if len(l) and not l.startswith("#")]
md['public-keys'] = keys
meta_js = {}
if "meta.js" in found:
content = ''
with open("%s/%s" % (source_dir, "meta.js")) as fp:
content = fp.read()
md['meta_js'] = content
try:
meta_js = json.loads(content)
except ValueError:
raise nonConfigDriveDir("%s: %s" %
(source_dir, "invalid json in meta.js"))
for copy in ('public-keys', 'dsmode', 'instance-id', 'dscfg'):
if copy in meta_js:
md[copy] = meta_js[copy]
if 'user-data' in meta_js:
ud = meta_js['user-data']
return(md, ud)
datasources = (
(DataSourceConfigDrive, (DataSource.DEP_FILESYSTEM, )),
(DataSourceConfigDriveNet,
(DataSource.DEP_FILESYSTEM, DataSource.DEP_NETWORK)),
)
# return a list of data sources that match this set of dependencies
def get_datasource_list(depends):
return(DataSource.list_from_depends(depends, datasources))
if __name__ == "__main__":
def main():
import sys
import pprint
print cfg_drive_device()
(md, ud) = read_config_drive_dir(sys.argv[1])
print "=== md ==="
pprint.pprint(md)
print "=== ud ==="
print(ud)
main()
# vi: ts=4 expandtab
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