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# Copyright (C) 2014 CloudSigma
#
# Author: Kiril Vladimiroff <kiril.vladimiroff@cloudsigma.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
from base64 import b64decode
import re
from cloudinit.cs_utils import Cepko
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import util
LOG = logging.getLogger(__name__)
class DataSourceCloudSigma(sources.DataSource):
"""
Uses cepko in order to gather the server context from the VM.
For more information about CloudSigma's Server Context:
http://cloudsigma-docs.readthedocs.org/en/latest/server_context.html
"""
dsname = 'CloudSigma'
def __init__(self, sys_cfg, distro, paths):
self.cepko = Cepko()
self.ssh_public_key = ''
sources.DataSource.__init__(self, sys_cfg, distro, paths)
def is_running_in_cloudsigma(self):
"""
Uses dmi data to detect if this instance of cloud-init is running
in the CloudSigma's infrastructure.
"""
LOG.debug("determining hypervisor product name via dmi data")
sys_product_name = util.read_dmi_data("system-product-name")
if not sys_product_name:
LOG.debug("system-product-name not available in dmi data")
return False
else:
LOG.debug("detected hypervisor as %s", sys_product_name)
return 'cloudsigma' in sys_product_name.lower()
LOG.warning("failed to query dmi data for system product name")
return False
def _get_data(self):
"""
Metadata is the whole server context and /meta/cloud-config is used
as userdata.
"""
dsmode = None
if not self.is_running_in_cloudsigma():
return False
try:
server_context = self.cepko.all().result
server_meta = server_context['meta']
except Exception:
# TODO: check for explicit "config on", and then warn
# but since no explicit config is available now, just debug.
LOG.debug("CloudSigma: Unable to read from serial port")
return False
self.dsmode = self._determine_dsmode(
[server_meta.get('cloudinit-dsmode')])
if dsmode == sources.DSMODE_DISABLED:
return False
base64_fields = server_meta.get('base64_fields', '').split(',')
self.userdata_raw = server_meta.get('cloudinit-user-data', "")
if 'cloudinit-user-data' in base64_fields:
self.userdata_raw = b64decode(self.userdata_raw)
if 'cloudinit' in server_context.get('vendor_data', {}):
self.vendordata_raw = server_context["vendor_data"]["cloudinit"]
self.metadata = server_context
self.ssh_public_key = server_meta['ssh_public_key']
return True
def get_hostname(self, fqdn=False, resolve_ip=False):
"""
Cleans up and uses the server's name if the latter is set. Otherwise
the first part from uuid is being used.
"""
if re.match(r'^[A-Za-z0-9 -_\.]+$', self.metadata['name']):
return self.metadata['name'][:61]
else:
return self.metadata['uuid'].split('-')[0]
def get_public_ssh_keys(self):
return [self.ssh_public_key]
def get_instance_id(self):
return self.metadata['uuid']
# Legacy: Must be present in case we load an old pkl object
DataSourceCloudSigmaNet = DataSourceCloudSigma
# Used to match classes to dependencies. Since this datasource uses the serial
# port network is not really required, so it's okay to load without it, too.
datasources = [
(DataSourceCloudSigma, (sources.DEP_FILESYSTEM, )),
]
def get_datasource_list(depends):
"""
Return a list of data sources that match this set of dependencies
"""
return sources.list_from_depends(depends, datasources)
# vi: ts=4 expandtab
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