148 lines
4.9 KiB
Python
148 lines
4.9 KiB
Python
# 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
|
|
|
|
import boto.utils as boto_utils
|
|
|
|
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 = 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 %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)
|