147 lines
4.9 KiB
Python
147 lines
4.9 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2012 Canonical Ltd.
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# Copyright (C) 2012 Cosmin Luta
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# Copyright (C) 2012 Yahoo! Inc.
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#
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# Author: Cosmin Luta <q4break@gmail.com>
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# Author: Scott Moser <scott.moser@canonical.com>
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# Author: Joshua Harlow <harlowja@yahoo-inc.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from socket import inet_ntoa
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from struct import pack
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import os
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import time
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import boto.utils as boto_utils
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from cloudinit import log as logging
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from cloudinit import sources
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from cloudinit import url_helper as uhelp
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from cloudinit import util
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LOG = logging.getLogger(__name__)
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class DataSourceCloudStack(sources.DataSource):
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def __init__(self, sys_cfg, distro, paths):
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sources.DataSource.__init__(self, sys_cfg, distro, paths)
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self.seed_dir = os.path.join(paths.seed_dir, 'cs')
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# Cloudstack has its metadata/userdata URLs located at
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# http://<default-gateway-ip>/latest/
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self.api_ver = 'latest'
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gw_addr = self.get_default_gateway()
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if not gw_addr:
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raise RuntimeError("No default gateway found!")
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self.metadata_address = "http://%s/" % (gw_addr)
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def get_default_gateway(self):
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"""Returns the default gateway ip address in the dotted format."""
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lines = util.load_file("/proc/net/route").splitlines()
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for line in lines:
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items = line.split("\t")
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if items[1] == "00000000":
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# Found the default route, get the gateway
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gw = inet_ntoa(pack("<L", int(items[2], 16)))
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LOG.debug("Found default route, gateway is %s", gw)
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return gw
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return None
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def __str__(self):
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return util.obj_name(self)
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def _get_url_settings(self):
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mcfg = self.ds_cfg
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if not mcfg:
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mcfg = {}
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max_wait = 120
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try:
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max_wait = int(mcfg.get("max_wait", max_wait))
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except Exception:
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util.logexc(LOG, "Failed to get max wait. using %s", max_wait)
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if max_wait == 0:
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return False
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timeout = 50
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try:
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timeout = int(mcfg.get("timeout", timeout))
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except Exception:
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util.logexc(LOG, "Failed to get timeout, using %s", timeout)
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return (max_wait, timeout)
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def wait_for_metadata_service(self):
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mcfg = self.ds_cfg
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if not mcfg:
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mcfg = {}
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(max_wait, timeout) = self._get_url_settings()
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urls = [self.metadata_address]
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start_time = time.time()
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url = uhelp.wait_for_url(urls=urls, max_wait=max_wait,
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timeout=timeout, status_cb=LOG.warn)
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if url:
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LOG.debug("Using metadata source: '%s'", url)
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else:
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LOG.critical(("Giving up on waiting for the metadata from %s"
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" after %s seconds"),
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urls, int(time.time() - start_time))
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return bool(url)
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def get_data(self):
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seed_ret = {}
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if util.read_optional_seed(seed_ret, base=(self.seed_dir + "/")):
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self.userdata_raw = seed_ret['user-data']
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self.metadata = seed_ret['meta-data']
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LOG.debug("Using seeded cloudstack data from: %s", self.seed_dir)
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return True
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try:
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if not self.wait_for_metadata_service():
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return False
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start_time = time.time()
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self.userdata_raw = boto_utils.get_instance_userdata(self.api_ver,
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None, self.metadata_address)
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self.metadata = boto_utils.get_instance_metadata(self.api_ver,
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self.metadata_address)
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LOG.debug("Crawl of metadata service took %s seconds",
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int(time.time() - start_time))
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return True
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except Exception:
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util.logexc(LOG, ('Failed fetching from metadata '
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'service %s'), self.metadata_address)
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return False
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def get_instance_id(self):
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return self.metadata['instance-id']
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def get_availability_zone(self):
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return self.metadata['availability-zone']
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# Used to match classes to dependencies
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datasources = [
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(DataSourceCloudStack, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
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]
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# Return a list of data sources that match this set of dependencies
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def get_datasource_list(depends):
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return sources.list_from_depends(depends, datasources)
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