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# Copyright (C) 2014 Yahoo! Inc.
#
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import time
from cloudinit import log as logging
from cloudinit import sources
from cloudinit import url_helper
from cloudinit import util
from cloudinit.sources.helpers import openstack
LOG = logging.getLogger(__name__)
# Various defaults/constants...
DEF_MD_URL = "http://169.254.169.254"
DEFAULT_IID = "iid-dsopenstack"
DEFAULT_METADATA = {
"instance-id": DEFAULT_IID,
}
class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
def __init__(self, sys_cfg, distro, paths):
super(DataSourceOpenStack, self).__init__(sys_cfg, distro, paths)
self.metadata_address = None
self.ssl_details = util.fetch_ssl_details(self.paths)
self.version = None
self.files = {}
self.ec2_metadata = None
def __str__(self):
root = sources.DataSource.__str__(self)
mstr = "%s [%s,ver=%s]" % (root, self.dsmode, self.version)
return mstr
def _get_url_settings(self):
# TODO(harlowja): this is shared with ec2 datasource, we should just
# move it to a shared location instead...
# Note: the defaults here are different though.
# max_wait < 0 indicates do not wait
max_wait = -1
timeout = 10
retries = 5
try:
max_wait = int(self.ds_cfg.get("max_wait", max_wait))
except Exception:
util.logexc(LOG, "Failed to get max wait. using %s", max_wait)
try:
timeout = max(0, int(self.ds_cfg.get("timeout", timeout)))
except Exception:
util.logexc(LOG, "Failed to get timeout, using %s", timeout)
try:
retries = int(self.ds_cfg.get("retries", retries))
except Exception:
util.logexc(LOG, "Failed to get retries. using %s", retries)
return (max_wait, timeout, retries)
def wait_for_metadata_service(self):
urls = self.ds_cfg.get("metadata_urls", [DEF_MD_URL])
filtered = [x for x in urls if util.is_resolvable_url(x)]
if set(filtered) != set(urls):
LOG.debug("Removed the following from metadata urls: %s",
list((set(urls) - set(filtered))))
if len(filtered):
urls = filtered
else:
LOG.warning("Empty metadata url list! using default list")
urls = [DEF_MD_URL]
md_urls = []
url2base = {}
for url in urls:
md_url = url_helper.combine_url(url, 'openstack')
md_urls.append(md_url)
url2base[md_url] = url
(max_wait, timeout, retries) = self._get_url_settings()
start_time = time.time()
avail_url = url_helper.wait_for_url(urls=md_urls, max_wait=max_wait,
timeout=timeout)
if avail_url:
LOG.debug("Using metadata source: '%s'", url2base[avail_url])
else:
LOG.debug("Giving up on OpenStack md from %s after %s seconds",
md_urls, int(time.time() - start_time))
self.metadata_address = url2base.get(avail_url)
return bool(avail_url)
def get_data(self):
try:
if not self.wait_for_metadata_service():
return False
except IOError:
return False
(max_wait, timeout, retries) = self._get_url_settings()
try:
results = util.log_time(LOG.debug,
'Crawl of openstack metadata service',
read_metadata_service,
args=[self.metadata_address],
kwargs={'ssl_details': self.ssl_details,
'retries': retries,
'timeout': timeout})
except openstack.NonReadable:
return False
except (openstack.BrokenMetadata, IOError):
util.logexc(LOG, "Broken metadata address %s",
self.metadata_address)
return False
self.dsmode = self._determine_dsmode([results.get('dsmode')])
if self.dsmode == sources.DSMODE_DISABLED:
return False
md = results.get('metadata', {})
md = util.mergemanydict([md, DEFAULT_METADATA])
self.metadata = md
self.ec2_metadata = results.get('ec2-metadata')
self.userdata_raw = results.get('userdata')
self.version = results['version']
self.files.update(results.get('files', {}))
vd = results.get('vendordata')
self.vendordata_pure = vd
try:
self.vendordata_raw = sources.convert_vendordata(vd)
except ValueError as e:
LOG.warning("Invalid content in vendor-data: %s", e)
self.vendordata_raw = None
return True
def check_instance_id(self, sys_cfg):
# quickly (local check only) if self.instance_id is still valid
return sources.instance_id_matches_system_uuid(self.get_instance_id())
def read_metadata_service(base_url, ssl_details=None,
timeout=5, retries=5):
reader = openstack.MetadataReader(base_url, ssl_details=ssl_details,
timeout=timeout, retries=retries)
return reader.read_v2()
# Used to match classes to dependencies
datasources = [
(DataSourceOpenStack, (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)
# vi: ts=4 expandtab
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