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Directory : /lib/python3/dist-packages/cloudinit/sources/

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Current File : /lib/python3/dist-packages/cloudinit/sources/DataSourceCloudSigma.py

# 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 re
from base64 import b64decode

from cloudinit import dmi
from cloudinit import log as logging
from cloudinit import 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)

    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 = 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
        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_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)


# vi: ts=4 expandtab

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