Current File : //lib/python2.7/site-packages/salt/grains/metadata.py
# -*- coding: utf-8 -*-
'''
Grains from cloud metadata servers at 169.254.169.254
.. versionadded:: 2017.7.0
:depends: requests
To enable these grains that pull from the http://169.254.169.254/latest
metadata server set `metadata_server_grains: True`.
.. code-block:: yaml
metadata_server_grains: True
'''
from __future__ import absolute_import, print_function, unicode_literals
# Import python libs
import os
import socket
# Import salt libs
import salt.ext.six as six
import salt.utils.data
import salt.utils.http as http
import salt.utils.json
import salt.utils.stringutils
# metadata server information
IP = '169.254.169.254'
HOST = 'http://{0}/'.format(IP)
def __virtual__():
if __opts__.get('metadata_server_grains', False) is False:
return False
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(.1)
result = sock.connect_ex((IP, 80))
if result != 0:
return False
if http.query(os.path.join(HOST, 'latest/'), status=True).get('status') != 200:
return False
return True
def _search(prefix="latest/"):
'''
Recursively look up all grains in the metadata server
'''
ret = {}
linedata = http.query(os.path.join(HOST, prefix), headers=True)
if 'body' not in linedata:
return ret
body = salt.utils.stringutils.to_unicode(linedata['body'])
if linedata['headers'].get('Content-Type', 'text/plain') == 'application/octet-stream':
return body
for line in body.split('\n'):
if line.endswith('/'):
ret[line[:-1]] = _search(prefix=os.path.join(prefix, line))
elif prefix == 'latest/':
# (gtmanfred) The first level should have a forward slash since
# they have stuff underneath. This will not be doubled up though,
# because lines ending with a slash are checked first.
ret[line] = _search(prefix=os.path.join(prefix, line + '/'))
elif line.endswith(('dynamic', 'meta-data')):
ret[line] = _search(prefix=os.path.join(prefix, line))
elif '=' in line:
key, value = line.split('=')
ret[value] = _search(prefix=os.path.join(prefix, key))
else:
retdata = http.query(os.path.join(HOST, prefix, line)).get('body', None)
# (gtmanfred) This try except block is slightly faster than
# checking if the string starts with a curly brace
if isinstance(retdata, six.binary_type):
try:
ret[line] = salt.utils.json.loads(salt.utils.stringutils.to_unicode(retdata))
except ValueError:
ret[line] = salt.utils.stringutils.to_unicode(retdata)
else:
ret[line] = retdata
return salt.utils.data.decode(ret)
def metadata():
return _search()
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