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# vi: ts=4 expandtab
#
# Copyright (C) 2009-2010 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Joe VLcek <JVLcek@RedHat.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 errno
import os
import os.path
import time
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import util
from cloudinit.util import ProcessExecutionError
LOG = logging.getLogger(__name__)
# Needed file paths
CLOUD_INFO_FILE = '/etc/sysconfig/cloud-info'
# Shell command lists
CMD_DMI_SYSTEM = ['/usr/sbin/dmidecode', '--string', 'system-product-name']
CMD_PROBE_FLOPPY = ['/sbin/modprobe', 'floppy']
# Retry times and sleep secs between each try
RETRY_TIMES = 3
SLEEP_SECS = 3
META_DATA_NOT_SUPPORTED = {
'block-device-mapping': {},
'instance-id': 455,
'local-hostname': 'localhost',
'placement': {},
}
def read_user_data_callback(mount_dir):
'''
Description:
This callback will be applied by util.mount_cb() on the mounted
file.
Deltacloud file name contains deltacloud. Those not using
Deltacloud but instead instrumenting the injection, could
drop deltacloud from the file name.
Input:
mount_dir - Mount directory
Returns:
User Data
'''
deltacloud_user_data_file = mount_dir + '/deltacloud-user-data.txt'
user_data_file = mount_dir + '/user-data.txt'
# First try deltacloud_user_data_file. On failure try user_data_file.
try:
with open(deltacloud_user_data_file, 'r') as user_data_f:
user_data = user_data_f.read().strip()
except:
try:
with open(user_data_file, 'r') as user_data_f:
user_data = user_data_f.read().strip()
except:
util.logexc(LOG, ('Failed accessing user data file.'))
return None
return user_data
class DataSourceAltCloud(sources.DataSource):
def __init__(self, sys_cfg, distro, paths):
sources.DataSource.__init__(self, sys_cfg, distro, paths)
self.seed = None
self.supported_seed_starts = ("/", "file://")
def __str__(self):
mstr = "%s [seed=%s]" % (util.obj_name(self), self.seed)
return mstr
def get_cloud_type(self):
'''
Description:
Get the type for the cloud back end this instance is running on
by examining the string returned by:
dmidecode --string system-product-name
On VMWare/vSphere dmidecode returns: RHEV Hypervisor
On VMWare/vSphere dmidecode returns: VMware Virtual Platform
Input:
None
Returns:
One of the following strings:
'RHEV', 'VSPHERE' or 'UNKNOWN'
'''
cmd = CMD_DMI_SYSTEM
try:
(cmd_out, _err) = util.subp(cmd)
except ProcessExecutionError, _err:
LOG.debug(('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message))
return 'UNKNOWN'
except OSError, _err:
LOG.debug(('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message))
return 'UNKNOWN'
if cmd_out.upper().startswith('RHEV'):
return 'RHEV'
if cmd_out.upper().startswith('VMWARE'):
return 'VSPHERE'
return 'UNKNOWN'
def get_data(self):
'''
Description:
User Data is passed to the launching instance which
is used to perform instance configuration.
Cloud providers expose the user data differently.
It is necessary to determine which cloud provider
the current instance is running on to determine
how to access the user data. Images built with
image factory will contain a CLOUD_INFO_FILE which
contains a string identifying the cloud provider.
Images not built with Imagefactory will try to
determine what the cloud provider is based on system
information.
'''
LOG.debug('Invoked get_data()')
if os.path.exists(CLOUD_INFO_FILE):
try:
cloud_info = open(CLOUD_INFO_FILE)
cloud_type = cloud_info.read().strip().upper()
cloud_info.close()
except:
util.logexc(LOG, 'Unable to access cloud info file.')
return False
else:
cloud_type = self.get_cloud_type()
LOG.debug('cloud_type: ' + str(cloud_type))
# Simple retry logic around user_data_<type>() methods
tries = RETRY_TIMES
sleep_secs = SLEEP_SECS
while tries > 0:
if 'RHEV' in cloud_type:
if self.user_data_rhevm():
return True
elif 'VSPHERE' in cloud_type:
if self.user_data_vsphere():
return True
else:
# there was no recognized alternate cloud type.
# suggesting this handler should not be used.
return False
time.sleep(sleep_secs)
tries -= 1
sleep_secs *= 3
# Retry loop exhausted
return False
def user_data_rhevm(self):
'''
RHEVM specific userdata read
If on RHEV-M the user data will be contained on the
floppy device in file <user_data_file>
To access it:
modprobe floppy
Leverage util.mount_cb to:
mkdir <tmp mount dir>
mount /dev/fd0 <tmp mount dir>
The call back passed to util.mount_cb will do:
read <tmp mount dir>/<user_data_file>
'''
return_str = None
# modprobe floppy
try:
cmd = CMD_PROBE_FLOPPY
(cmd_out, _err) = util.subp(cmd)
LOG.debug(('Command: %s\nOutput%s') % (' '.join(cmd), cmd_out))
except ProcessExecutionError, _err:
util.logexc(LOG, (('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message)))
return False
except OSError, _err:
util.logexc(LOG, (('Failed command: %s\n%s') % \
(' '.join(cmd), _err.message)))
return False
floppy_dev = '/dev/fd0'
try:
return_str = util.mount_cb(floppy_dev, read_user_data_callback)
except OSError as err:
if err.errno != errno.ENOENT:
raise
except util.MountFailedError:
util.logexc(LOG, ("Failed to mount %s"
" when looking for user data"), floppy_dev)
self.userdata_raw = return_str
self.metadata = META_DATA_NOT_SUPPORTED
if return_str:
return True
else:
return False
def user_data_vsphere(self):
'''
vSphere specific userdata read
If on vSphere the user data will be contained on the
cdrom device in file <user_data_file>
To access it:
Leverage util.mount_cb to:
mkdir <tmp mount dir>
mount /dev/fd0 <tmp mount dir>
The call back passed to util.mount_cb will do:
read <tmp mount dir>/<user_data_file>
'''
return_str = None
cdrom_list = util.find_devs_with('LABEL=CDROM')
for cdrom_dev in cdrom_list:
try:
return_str = util.mount_cb(cdrom_dev, read_user_data_callback)
if return_str:
break
except OSError as err:
if err.errno != errno.ENOENT:
raise
except util.MountFailedError:
util.logexc(LOG, ("Failed to mount %s"
" when looking for user data"), cdrom_dev)
self.userdata_raw = return_str
self.metadata = META_DATA_NOT_SUPPORTED
if return_str:
return True
else:
return False
# Used to match classes to dependencies
datasources = [
(DataSourceAltCloud, (sources.DEP_FILESYSTEM, )),
]
# Return a list of data sources that match this set of dependencies
def get_datasource_list(depends):
return sources.list_from_depends(depends, datasources)
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