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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.
import logging
import re
from base64 import b64decode
from cloudinit import dmi, sources
from cloudinit.sources import DataSourceHostname
from cloudinit.sources.helpers.cloudsigma import SERIAL_PORT, Cepko
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)
@staticmethod
def ds_detect():
"""
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 = dmi.read_dmi_data("system-product-name")
if not sys_product_name:
LOG.debug("system-product-name not available in dmi data")
return False
LOG.debug("detected hypervisor as %s", sys_product_name)
return "cloudsigma" in sys_product_name.lower()
def _get_data(self):
"""
Metadata is the whole server context and /meta/cloud-config is used
as userdata.
"""
dsmode = None
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_subplatform(self):
"""Return the subplatform metadata source details."""
return "cepko (%s)" % SERIAL_PORT
def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=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"]):
ret = self.metadata["name"][:61]
else:
ret = self.metadata["uuid"].split("-")[0]
return DataSourceHostname(ret, False)
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)