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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
System-level utilities and helper functions.
"""
from datetime import datetime
import inspect
import logging
import os
import random
import subprocess
import socket
import sys
from nova import flags
FLAGS = flags.FLAGS
def fetchfile(url, target):
logging.debug("Fetching %s" % url)
# c = pycurl.Curl()
# fp = open(target, "wb")
# c.setopt(c.URL, url)
# c.setopt(c.WRITEDATA, fp)
# c.perform()
# c.close()
# fp.close()
execute("curl %s -o %s" % (url, target))
def execute(cmd, input=None, addl_env=None):
env = os.environ.copy()
if addl_env:
env.update(addl_env)
obj = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE,
stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env)
result = None
if input != None:
result = obj.communicate(input)
else:
result = obj.communicate()
obj.stdin.close()
if obj.returncode:
logging.debug("Result was %s" % (obj.returncode))
return result
def abspath(s):
return os.path.join(os.path.dirname(__file__), s)
def default_flagfile(filename='nova.conf'):
for arg in sys.argv:
if arg.find('flagfile') != -1:
break
else:
if not os.path.isabs(filename):
# turn relative filename into an absolute path
script_dir = os.path.dirname(inspect.stack()[-1][1])
filename = os.path.abspath(os.path.join(script_dir, filename))
if os.path.exists(filename):
sys.argv = sys.argv[:1] + ['--flagfile=%s' % filename] + sys.argv[1:]
def debug(arg):
logging.debug('debug in callback: %s', arg)
return arg
def runthis(prompt, cmd):
logging.debug("Running %s" % (cmd))
logging.debug(prompt % (subprocess.call(cmd.split(" "))))
def generate_uid(topic, size=8):
return '%s-%s' % (topic, ''.join([random.choice('01234567890abcdefghijklmnopqrstuvwxyz') for x in xrange(size)]))
def generate_mac():
mac = [0x00, 0x16, 0x3e, random.randint(0x00, 0x7f),
random.randint(0x00, 0xff), random.randint(0x00, 0xff)
]
return ':'.join(map(lambda x: "%02x" % x, mac))
def last_octet(address):
return int(address.split(".")[-1])
def get_my_ip():
''' returns the actual ip of the local machine.
'''
if getattr(FLAGS, 'fake_tests', None):
return '127.0.0.1'
csock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
csock.connect(('www.google.com', 80))
(addr, port) = csock.getsockname()
csock.close()
return addr
def isotime(at=None):
if not at:
at = datetime.utcnow()
return at.strftime("%Y-%m-%dT%H:%M:%SZ")
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