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# vi: ts=4 expandtab
#
# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Cosmin Luta
#
# Author: Cosmin Luta <q4break@gmail.com>
# Author: Scott Moser <scott.moser@canonical.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 cloudinit.DataSource as DataSource
from cloudinit import seeddir as base_seeddir
from cloudinit import log
import cloudinit.util as util
from socket import inet_ntoa
import time
import boto.utils as boto_utils
from struct import pack
class DataSourceCloudStack(DataSource.DataSource):
api_ver = 'latest'
seeddir = base_seeddir + '/cs'
metadata_address = None
def __init__(self, sys_cfg=None):
DataSource.DataSource.__init__(self, sys_cfg)
# Cloudstack has its metadata/userdata URLs located at
# http://<default-gateway-ip>/latest/
self.metadata_address = "http://%s/" % self.get_default_gateway()
def get_default_gateway(self):
""" Returns the default gateway ip address in the dotted format
"""
with open("/proc/net/route", "r") as f:
for line in f.readlines():
items = line.split("\t")
if items[1] == "00000000":
# found the default route, get the gateway
gw = inet_ntoa(pack("<L", int(items[2], 16)))
log.debug("found default route, gateway is %s" % gw)
return gw
def __str__(self):
return "DataSourceCloudStack"
def get_data(self):
seedret = {}
if util.read_optional_seed(seedret, base=self.seeddir + "/"):
self.userdata_raw = seedret['user-data']
self.metadata = seedret['meta-data']
log.debug("using seeded cs data in %s" % self.seeddir)
return True
try:
start = time.time()
self.userdata_raw = boto_utils.get_instance_userdata(self.api_ver,
None, self.metadata_address)
self.metadata = boto_utils.get_instance_metadata(self.api_ver,
self.metadata_address)
log.debug("crawl of metadata service took %ds" %
(time.time() - start))
return True
except Exception as e:
log.exception(e)
return False
def get_instance_id(self):
return self.metadata['instance-id']
def get_availability_zone(self):
return self.metadata['availability-zone']
datasources = [
(DataSourceCloudStack, (DataSource.DEP_FILESYSTEM, DataSource.DEP_NETWORK)),
]
# return a list of data sources that match this set of dependencies
def get_datasource_list(depends):
return DataSource.list_from_depends(depends, datasources)
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