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File Content: `DataSourceAltCloud.py`

# Copyright (C) 2009-2010 Canonical Ltd.
# Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Joe VLcek <JVLcek@RedHat.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
#
# This file is part of cloud-init. See LICENSE file for license information.

'''
This file contains code used to gather the user data passed to an
instance on RHEVm and vSphere.
'''

import errno
import os
import os.path

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_PROBE_FLOPPY = ['modprobe', 'floppy']

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:
        user_data = util.load_file(deltacloud_user_data_file).strip()
    except IOError:
        try:
            user_data = util.load_file(user_data_file).strip()
        except IOError:
            util.logexc(LOG, 'Failed accessing user data file.')
            return None

    return user_data


class DataSourceAltCloud(sources.DataSource):

    dsname = 'AltCloud'

    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):
        root = sources.DataSource.__str__(self)
        return "%s [seed=%s]" % (root, self.seed)

    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 reading either:
                CLOUD_INFO_FILE or
                the dmi data.

        Input:
            None

        Returns:
            One of the following strings:
            'RHEV', 'VSPHERE' or 'UNKNOWN'

        '''
        if os.path.exists(CLOUD_INFO_FILE):
            try:
                cloud_type = util.load_file(CLOUD_INFO_FILE).strip().upper()
            except IOError:
                util.logexc(LOG, 'Unable to access cloud info file at %s.',
                            CLOUD_INFO_FILE)
                return 'UNKNOWN'
            return cloud_type
        system_name = util.read_dmi_data("system-product-name")
        if not system_name:
            return 'UNKNOWN'

        sys_name = system_name.upper()

        if sys_name.startswith('RHEV'):
            return 'RHEV'

        if sys_name.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()')

        cloud_type = self.get_cloud_type()

        LOG.debug('cloud_type: %s', str(cloud_type))

        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
            # indicating this handler should not be used.
            return False

        # No user data found
        util.logexc(LOG, 'Failed accessing user data.')
        return False

    def _get_subplatform(self):
        """Return the subplatform metadata details."""
        cloud_type = self.get_cloud_type()
        if not hasattr(self, 'source'):
            self.source = sources.METADATA_UNKNOWN
        if cloud_type == 'RHEV':
            self.source = '/dev/fd0'
        return '%s (%s)' % (cloud_type.lower(), self.source)

    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:
            modprobe_floppy()
        except ProcessExecutionError as e:
            util.logexc(LOG, 'Failed modprobe: %s', e)
            return False

        floppy_dev = '/dev/fd0'

        # udevadm settle for floppy device
        try:
            util.udevadm_settle(exists=floppy_dev, timeout=5)
        except (ProcessExecutionError, OSError) as e:
            util.logexc(LOG, 'Failed udevadm_settle: %s\n', e)
            return False

        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:
                    self.source = cdrom_dev
                    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


def modprobe_floppy():
    out, _err = util.subp(CMD_PROBE_FLOPPY)
    LOG.debug('Command: %s\nOutput%s', ' '.join(CMD_PROBE_FLOPPY), out)


# Used to match classes to dependencies
# Source DataSourceAltCloud does not really depend on networking.
# In the future 'dsmode' like behavior can be added to offer user
# the ability to run before networking.
datasources = [
    (DataSourceAltCloud, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
]


# Return a list of data sources that match this set of dependencies
def get_datasource_list(depends):
    return sources.list_from_depends(depends, datasources)

# vi: ts=4 expandtab

Name	Size	Permission
helpers	---	0755
DataSourceAliYun.py	1829 bytes	0644
DataSourceAliYun.pyc	2712 bytes	0644
DataSourceAliYun.pyo	2712 bytes	0644
DataSourceAltCloud.py	8380 bytes	0644
DataSourceAltCloud.pyc	8273 bytes	0644
DataSourceAltCloud.pyo	8273 bytes	0644
DataSourceAzure.py	57192 bytes	0644
DataSourceAzure.pyc	49487 bytes	0644
DataSourceAzure.pyo	49487 bytes	0644
DataSourceBigstep.py	1917 bytes	0644
DataSourceBigstep.pyc	2457 bytes	0644
DataSourceBigstep.pyo	2457 bytes	0644
DataSourceCloudSigma.py	3979 bytes	0644
DataSourceCloudSigma.pyc	4624 bytes	0644
DataSourceCloudSigma.pyo	4624 bytes	0644
DataSourceCloudStack.py	9750 bytes	0644
DataSourceCloudStack.pyc	9225 bytes	0644
DataSourceCloudStack.pyo	9225 bytes	0644
DataSourceConfigDrive.py	10612 bytes	0644
DataSourceConfigDrive.pyc	10014 bytes	0644
DataSourceConfigDrive.pyo	10014 bytes	0644
DataSourceDigitalOcean.py	3788 bytes	0644
DataSourceDigitalOcean.pyc	4189 bytes	0644
DataSourceDigitalOcean.pyo	4189 bytes	0644
DataSourceEc2.py	27773 bytes	0644
DataSourceEc2.pyc	23215 bytes	0644
DataSourceEc2.pyo	23215 bytes	0644
DataSourceExoscale.py	9122 bytes	0644
DataSourceExoscale.pyc	7669 bytes	0644
DataSourceExoscale.pyo	7669 bytes	0644
DataSourceGCE.py	11049 bytes	0644
DataSourceGCE.pyc	11170 bytes	0644
DataSourceGCE.pyo	11170 bytes	0644
DataSourceHetzner.py	3581 bytes	0644
DataSourceHetzner.pyc	3825 bytes	0644
DataSourceHetzner.pyo	3825 bytes	0644
DataSourceIBMCloud.py	14128 bytes	0644
DataSourceIBMCloud.pyc	14966 bytes	0644
DataSourceIBMCloud.pyo	14966 bytes	0644
DataSourceMAAS.py	14390 bytes	0644
DataSourceMAAS.pyc	14426 bytes	0644
DataSourceMAAS.pyo	14426 bytes	0644
DataSourceNoCloud.py	13791 bytes	0644
DataSourceNoCloud.pyc	11321 bytes	0644
DataSourceNoCloud.pyo	11321 bytes	0644
DataSourceNone.py	1464 bytes	0644
DataSourceNone.pyc	2148 bytes	0644
DataSourceNone.pyo	2148 bytes	0644
DataSourceOVF.py	23517 bytes	0644
DataSourceOVF.pyc	20140 bytes	0644
DataSourceOVF.pyo	20140 bytes	0644
DataSourceOpenNebula.py	15150 bytes	0644
DataSourceOpenNebula.pyc	15005 bytes	0644
DataSourceOpenNebula.pyo	15005 bytes	0644
DataSourceOpenStack.py	9450 bytes	0644
DataSourceOpenStack.pyc	9128 bytes	0644
DataSourceOpenStack.pyo	9128 bytes	0644
DataSourceOracle.py	14685 bytes	0644
DataSourceOracle.pyc	13975 bytes	0644
DataSourceOracle.pyo	13975 bytes	0644
DataSourceRbxCloud.py	7362 bytes	0644
DataSourceRbxCloud.pyc	8769 bytes	0644
DataSourceRbxCloud.pyo	8769 bytes	0644
DataSourceScaleway.py	9490 bytes	0644
DataSourceScaleway.pyc	10117 bytes	0644
DataSourceScaleway.pyo	10117 bytes	0644
DataSourceSmartOS.py	34217 bytes	0644
DataSourceSmartOS.pyc	31006 bytes	0644
DataSourceSmartOS.pyo	31006 bytes	0644
__init__.py	32500 bytes	0644
__init__.pyc	28232 bytes	0644
__init__.pyo	28232 bytes	0644

File Content: DataSourceAltCloud.py

File Content: `DataSourceAltCloud.py`