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# vi: ts=4 expandtab
#
# Copyright (C) 2009-2010 Canonical Ltd.
#
# 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 DataSource
import cloudinit
import socket
import urllib2
import time
import sys
import boto_utils
import os.path
class DataSourceEc2(DataSource.DataSource):
api_ver = '2009-04-04'
cachedir = cloudinit.cachedir + '/ec2'
location_locale_map = {
'us' : 'en_US.UTF-8',
'eu' : 'en_GB.UTF-8',
'default' : 'en_US.UTF-8',
}
def __init__(self):
pass
def get_data(self):
try:
udf = open(self.cachedir + "/user-data.raw")
self.userdata_raw = udf.read()
udf.close()
mdf = open(self.cachedir + "/meta-data.raw")
data = mdf.read()
self.metadata = eval(data)
mdf.close()
cloudinit.log.debug("using seeded ec2 cache data in %s" % self.cachedir)
return True
except:
pass
try:
if not self.wait_for_metadata_service():
return False
self.userdata_raw = boto_utils.get_instance_userdata(self.api_ver)
self.metadata = boto_utils.get_instance_metadata(self.api_ver)
return True
except Exception as e:
print e
return False
def get_instance_id(self):
return(self.metadata['instance-id'])
def get_availability_zone(self):
return(self.metadata['placement']['availability-zone'])
def get_local_mirror(self):
return(self.get_mirror_from_availability_zone())
def get_locale(self):
az = self.metadata['placement']['availability-zone']
if self.location_locale_map.has_key(az[0:2]):
return(self.location_locale_map[az[0:2]])
else:
return(self.location_locale_map["default"])
def get_hostname(self):
toks = self.metadata['local-hostname'].split('.')
# if there is an ipv4 address in 'local-hostname', then
# make up a hostname (LP: #475354)
if len(toks) == 4:
try:
r = filter(lambda x: int(x) < 256 and x > 0, toks)
if len(r) == 4:
return("ip-%s" % '-'.join(r))
except: pass
return toks[0]
def get_mirror_from_availability_zone(self, availability_zone = None):
# availability is like 'us-west-1b' or 'eu-west-1a'
if availability_zone == None:
availability_zone = self.get_availability_zone()
try:
host="%s.ec2.archive.ubuntu.com" % availability_zone[:-1]
socket.getaddrinfo(host, None, 0, socket.SOCK_STREAM)
return 'http://%s/ubuntu/' % host
except:
return 'http://archive.ubuntu.com/ubuntu/'
def wait_for_metadata_service(self, sleeps = 100):
sleeptime = 1
address = '169.254.169.254'
starttime = time.time()
url="http://%s/%s/meta-data/instance-id" % (address,self.api_ver)
for x in range(sleeps):
# given 100 sleeps, this ends up total sleep time of 1050 sec
sleeptime=int(x/5)+1
reason = ""
try:
req = urllib2.Request(url)
resp = urllib2.urlopen(req, timeout=2)
if resp.read() != "": return True
reason = "empty data [%s]" % resp.getcode()
except urllib2.HTTPError, e:
reason = "http error [%s]" % e.code
except urllib2.URLError, e:
reason = "url error [%s]" % e.reason
if x == 0:
cloudinit.log.warning("waiting for metadata service at %s\n" % url)
cloudinit.log.warning(" %s [%02s/%s]: %s\n" %
(time.strftime("%H:%M:%S"), x+1, sleeps, reason))
time.sleep(sleeptime)
cloudinit.log.critical("giving up on md after %i seconds\n" %
int(time.time()-starttime))
return False
def get_public_ssh_keys(self):
keys = []
if not self.metadata.has_key('public-keys'): return([])
for keyname, klist in self.metadata['public-keys'].items():
# lp:506332 uec metadata service responds with
# data that makes boto populate a string for 'klist' rather
# than a list.
if isinstance(klist,str):
klist = [ klist ]
for pkey in klist:
# there is an empty string at the end of the keylist, trim it
if pkey:
keys.append(pkey)
return(keys)
def device_name_to_device(self, name):
# consult metadata service, that has
# ephemeral0: sdb
# and return 'sdb' for input 'ephemeral0'
if not self.metadata.has_key('block-device-mapping'):
return(None)
found = None
for entname, device in self.metadata['block-device-mapping'].items():
if entname == name:
found = device
break
# LP: #513842 mapping in Euca has 'ephemeral' not 'ephemeral0'
if entname == "ephemeral" and name == "ephemeral0":
found = device
if found == None:
cloudinit.log.warn("returning None")
return None
# LP: #611137
# the metadata service may believe that devices are named 'sda'
# when the kernel named them 'vda' or 'xvda'
# we want to return the correct value for what will actually
# exist in this instance
mappings = { "sd": ("vd", "xvd") }
ofound = found
short = os.path.basename(found)
if not found.startswith("/"):
found="/dev/%s" % found
if os.path.exists(found):
return(found)
for nfrom, tlist in mappings.items():
if not short.startswith(nfrom): continue
for nto in tlist:
cand = "/dev/%s%s" % (nto, short[len(nfrom):])
if os.path.exists(cand):
cloudinit.log.debug("remapped device name %s => %s" % (found,cand))
return(cand)
return None
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