Current File : //usr/lib/python2.7/site-packages/salt/utils/state.py
# -*- coding: utf-8 -*-
'''
Utility functions for state functions
.. versionadded:: 2018.3.0
'''
# Import Python Libs
from __future__ import absolute_import, print_function, unicode_literals
import copy
# Import Salt libs
from salt.ext import six
from salt.exceptions import CommandExecutionError
import salt.state
_empty = object()
def gen_tag(low):
'''
Generate the running dict tag string from the low data structure
'''
return '{0[state]}_|-{0[__id__]}_|-{0[name]}_|-{0[fun]}'.format(low)
def search_onfail_requisites(sid, highstate):
'''
For a particular low chunk, search relevant onfail related states
'''
onfails = []
if '_|-' in sid:
st = salt.state.split_low_tag(sid)
else:
st = {'__id__': sid}
for fstate, fchunks in six.iteritems(highstate):
if fstate == st['__id__']:
continue
else:
for mod_, fchunk in six.iteritems(fchunks):
if (
not isinstance(mod_, six.string_types) or
mod_.startswith('__')
):
continue
else:
if not isinstance(fchunk, list):
continue
else:
# bydefault onfail will fail, but you can
# set onfail_stop: False to prevent the highstate
# to stop if you handle it
onfail_handled = False
for fdata in fchunk:
if not isinstance(fdata, dict):
continue
onfail_handled = (fdata.get('onfail_stop', True)
is False)
if onfail_handled:
break
if not onfail_handled:
continue
for fdata in fchunk:
if not isinstance(fdata, dict):
continue
for knob, fvalue in six.iteritems(fdata):
if knob != 'onfail':
continue
for freqs in fvalue:
for fmod, fid in six.iteritems(freqs):
if not (
fid == st['__id__'] and
fmod == st.get('state', fmod)
):
continue
onfails.append((fstate, mod_, fchunk))
return onfails
def check_onfail_requisites(state_id, state_result, running, highstate):
'''
When a state fail and is part of a highstate, check
if there is onfail requisites.
When we find onfail requisites, we will consider the state failed
only if at least one of those onfail requisites also failed
Returns:
True: if onfail handlers suceeded
False: if one on those handler failed
None: if the state does not have onfail requisites
'''
nret = None
if (
state_id and state_result and
highstate and isinstance(highstate, dict)
):
onfails = search_onfail_requisites(state_id, highstate)
if onfails:
for handler in onfails:
fstate, mod_, fchunk = handler
for rstateid, rstate in six.iteritems(running):
if '_|-' in rstateid:
st = salt.state.split_low_tag(rstateid)
# in case of simple state, try to guess
else:
id_ = rstate.get('__id__', rstateid)
if not id_:
raise ValueError('no state id')
st = {'__id__': id_, 'state': mod_}
if mod_ == st['state'] and fstate == st['__id__']:
ofresult = rstate.get('result', _empty)
if ofresult in [False, True]:
nret = ofresult
if ofresult is False:
# as soon as we find an errored onfail, we stop
break
# consider that if we parsed onfailes without changing
# the ret, that we have failed
if nret is None:
nret = False
return nret
def check_result(running, recurse=False, highstate=None):
'''
Check the total return value of the run and determine if the running
dict has any issues
'''
if not isinstance(running, dict):
return False
if not running:
return False
ret = True
for state_id, state_result in six.iteritems(running):
expected_type = dict
# The __extend__ state is a list
if "__extend__" == state_id:
expected_type = list
if not recurse and not isinstance(state_result, expected_type):
ret = False
if ret and isinstance(state_result, dict):
result = state_result.get('result', _empty)
if result is False:
ret = False
# only override return value if we are not already failed
elif result is _empty and isinstance(state_result, dict) and ret:
ret = check_result(
state_result, recurse=True, highstate=highstate)
# if we detect a fail, check for onfail requisites
if not ret:
# ret can be None in case of no onfail reqs, recast it to bool
ret = bool(check_onfail_requisites(state_id, state_result,
running, highstate))
# return as soon as we got a failure
if not ret:
break
return ret
def merge_subreturn(original_return, sub_return, subkey=None):
'''
Update an existing state return (`original_return`) in place
with another state return (`sub_return`), i.e. for a subresource.
Returns:
dict: The updated state return.
The existing state return does not need to have all the required fields,
as this is meant to be called from the internals of a state function,
but any existing data will be kept and respected.
It is important after using this function to check the return value
to see if it is False, in which case the main state should return.
Prefer to check `_ret['result']` instead of `ret['result']`,
as the latter field may not yet be populated.
Code Example:
.. code-block:: python
def state_func(name, config, alarm=None):
ret = {'name': name, 'comment': '', 'changes': {}}
if alarm:
_ret = __states__['subresource.managed'](alarm)
__utils__['state.merge_subreturn'](ret, _ret)
if _ret['result'] is False:
return ret
'''
if not subkey:
subkey = sub_return['name']
if sub_return['result'] is False:
# True or None stay the same
original_return['result'] = sub_return['result']
sub_comment = sub_return['comment']
if not isinstance(sub_comment, list):
sub_comment = [sub_comment]
original_return.setdefault('comment', [])
if isinstance(original_return['comment'], list):
original_return['comment'].extend(sub_comment)
else:
if original_return['comment']:
# Skip for empty original comments
original_return['comment'] += '\n'
original_return['comment'] += '\n'.join(sub_comment)
if sub_return['changes']: # changes always exists
original_return.setdefault('changes', {})
original_return['changes'][subkey] = sub_return['changes']
return original_return
def get_sls_opts(opts, **kwargs):
'''
Return a copy of the opts for use, optionally load a local config on top
'''
opts = copy.deepcopy(opts)
if 'localconfig' in kwargs:
return salt.config.minion_config(kwargs['localconfig'], defaults=opts)
if 'saltenv' in kwargs:
saltenv = kwargs['saltenv']
if saltenv is not None:
if not isinstance(saltenv, six.string_types):
saltenv = six.text_type(saltenv)
if opts['lock_saltenv'] and saltenv != opts['saltenv']:
raise CommandExecutionError(
'lock_saltenv is enabled, saltenv cannot be changed'
)
opts['saltenv'] = kwargs['saltenv']
if 'pillarenv' in kwargs or opts.get('pillarenv_from_saltenv', False):
pillarenv = kwargs.get('pillarenv') or kwargs.get('saltenv')
if pillarenv is not None and not isinstance(pillarenv, six.string_types):
opts['pillarenv'] = six.text_type(pillarenv)
else:
opts['pillarenv'] = pillarenv
return opts
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