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# vi: ts=4 expandtab
#
# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Cosmin Luta
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Cosmin Luta <q4break@gmail.com>
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.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/>.
from socket import inet_ntoa
from struct import pack
import os
import time
from cloudinit import ec2_utils as ec2
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import url_helper as uhelp
from cloudinit import util
LOG = logging.getLogger(__name__)
class DataSourceCloudStack(sources.DataSource):
def __init__(self, sys_cfg, distro, paths):
sources.DataSource.__init__(self, sys_cfg, distro, paths)
self.seed_dir = os.path.join(paths.seed_dir, 'cs')
# Cloudstack has its metadata/userdata URLs located at
# http://<default-gateway-ip>/latest/
self.api_ver = 'latest'
gw_addr = self.get_default_gateway()
if not gw_addr:
raise RuntimeError("No default gateway found!")
self.metadata_address = "http://%s/" % (gw_addr)
def get_default_gateway(self):
"""Returns the default gateway ip address in the dotted format."""
lines = util.load_file("/proc/net/route").splitlines()
for line in lines:
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
return None
def __str__(self):
return util.obj_name(self)
def _get_url_settings(self):
mcfg = self.ds_cfg
if not mcfg:
mcfg = {}
max_wait = 120
try:
max_wait = int(mcfg.get("max_wait", max_wait))
except Exception:
util.logexc(LOG, "Failed to get max wait. using %s", max_wait)
if max_wait == 0:
return False
timeout = 50
try:
timeout = int(mcfg.get("timeout", timeout))
except Exception:
util.logexc(LOG, "Failed to get timeout, using %s", timeout)
return (max_wait, timeout)
def wait_for_metadata_service(self):
mcfg = self.ds_cfg
if not mcfg:
mcfg = {}
(max_wait, timeout) = self._get_url_settings()
urls = [self.metadata_address]
start_time = time.time()
url = uhelp.wait_for_url(urls=urls, max_wait=max_wait,
timeout=timeout, status_cb=LOG.warn)
if url:
LOG.debug("Using metadata source: '%s'", url)
else:
LOG.critical(("Giving up on waiting for the metadata from %s"
" after %s seconds"),
urls, int(time.time() - start_time))
return bool(url)
def get_data(self):
seed_ret = {}
if util.read_optional_seed(seed_ret, base=(self.seed_dir + "/")):
self.userdata_raw = seed_ret['user-data']
self.metadata = seed_ret['meta-data']
LOG.debug("Using seeded cloudstack data from: %s", self.seed_dir)
return True
try:
if not self.wait_for_metadata_service():
return False
start_time = time.time()
self.userdata_raw = ec2.get_instance_userdata(self.api_ver,
self.metadata_address)
self.metadata = ec2.get_instance_metadata(self.api_ver,
self.metadata_address)
LOG.debug("Crawl of metadata service took %s seconds",
int(time.time() - start_time))
return True
except Exception:
util.logexc(LOG, ('Failed fetching from metadata '
'service %s'), self.metadata_address)
return False
def get_instance_id(self):
return self.metadata['instance-id']
@property
def availability_zone(self):
return self.metadata['availability-zone']
# Used to match classes to dependencies
datasources = [
(DataSourceCloudStack, (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)
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