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import DataSource
import ec2init
import boto.utils
import socket
import urllib2
import time
import cPickle
class DataSourceEc2(DataSource.DataSource):
api_ver = '2009-04-04'
conffile = '/etc/ec2-init/ec2-config.cfg'
cachedir = ec2init.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.pkl")
self.userdata_raw = cPickle.load(udf)
udf.close()
mdf = open(self.cachedir + "/meta-data.pkl")
self.metadata = cPickle.load(mdf)
mdf.close()
return True
except:
pass
try:
if not self.wait_for_metadata_service():
return False
self.metadata = boto.utils.get_instance_userdata(api_ver)
self.userdata_raw = boto.utils.get_instance_metadata(api_ver)
except Exception as e:
print e
return False
def get_instance_id(self):
return(self.metadata['instance-id'])
def wait_or_bail(self):
if self.wait_for_metadata_service():
return True
else:
bailout_command = self.get_cfg_option_str('bailout_command')
if bailout_command:
os.system(bailout_command)
return False
def get_cfg_option_str(self, key, default=None):
return self.config.get(key, default)
def get_ssh_keys(self):
conn = urllib2.urlopen('%s/public-keys/' % self.meta_data_base_url)
data = conn.read()
keyids = [line.split('=')[0] for line in data.split('\n')]
return [urllib2.urlopen('%s/public-keys/%d/openssh-key' % (self.meta_data_base_url, int(keyid))).read().rstrip() for keyid in keyids]
# def get_userdata(self):
# return boto.utils.get_instance_userdata()
#
# def get_instance_metadata(self):
# self.instance_metadata = getattr(self, 'instance_metadata', boto.utils.get_instance_metadata())
# return self.instance_metadata
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])
else:
return(self.location_locale_map["default"])
def get_hostname(self):
hostname = self.metadata['local-hostname']
hostname = hostname.split('.')[0]
return hostname
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 = 10):
sleeptime = 1
for x in range(sleeps):
s = socket.socket()
try:
address = '169.254.169.254'
port = 80
s.connect((address,port))
s.close()
return True
except socket.error, e:
print "sleeping %s" % sleeptime
time.sleep(sleeptime)
#timeout = timeout * 2
return False
def get_location_from_availability_zone(self, availability_zone):
if availability_zone.startswith('us-'):
return 'us'
elif availability_zone.startswith('eu-'):
return 'eu'
raise Exception('Could not determine location')
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():
for pkey in klist:
# there is an empty string at the end of the keylist, trim it
if pkey:
keys.append(pkey)
return(keys)
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