Current File : //lib/python2.7/site-packages/salt/tops/ext_nodes.py
# -*- coding: utf-8 -*-
'''
External Nodes Classifier
=========================
The External Nodes Classifier is a master tops subsystem that retrieves mapping
information from major configuration management systems. One of the most common
external nodes classifiers system is provided by Cobbler and is called
``cobbler-ext-nodes``.
The cobbler-ext-nodes command can be used with this configuration:
.. code-block:: yaml
master_tops:
ext_nodes: cobbler-ext-nodes
It is noteworthy that the Salt system does not directly ingest the data
sent from the ``cobbler-ext-nodes`` command, but converts the data into
information that is used by a Salt top file.
Any command can replace the call to 'cobbler-ext-nodes' above, but currently the
data must be formatted in the same way that the standard 'cobbler-ext-nodes'
does.
See (admittedly degenerate and probably not complete) example:
.. code-block:: yaml
classes:
- basepackages
- database
The above essentially is the same as a top.sls containing the following:
.. code-block:: yaml
base:
'*':
- basepackages
- database
base:
'*':
- basepackages
- database
'''
from __future__ import absolute_import, print_function, unicode_literals
# Import Python libs
import logging
import subprocess
# Import Salt libs
import salt.utils.yaml
log = logging.getLogger(__name__)
def __virtual__():
'''
Only run if properly configured
'''
if __opts__['master_tops'].get('ext_nodes'):
return True
return False
def top(**kwargs):
'''
Run the command configured
'''
if 'id' not in kwargs['opts']:
return {}
cmd = '{0} {1}'.format(
__opts__['master_tops']['ext_nodes'],
kwargs['opts']['id']
)
ndata = salt.utils.yaml.safe_load(
subprocess.Popen(
cmd,
shell=True,
stdout=subprocess.PIPE).communicate()[0]
)
if not ndata:
log.info('master_tops ext_nodes call did not return any data')
ret = {}
if 'environment' in ndata:
env = ndata['environment']
else:
env = 'base'
if 'classes' in ndata:
if isinstance(ndata['classes'], dict):
ret[env] = list(ndata['classes'])
elif isinstance(ndata['classes'], list):
ret[env] = ndata['classes']
else:
return ret
else:
log.info('master_tops ext_nodes call did not have a dictionary with a "classes" key.')
return ret
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