ansible-config_template/action/_v1_config_template.py
Kevin Carter 80beba88da Add option to toggle list extensions
By default a list item in a JSON or YAML format will extend if a its already
defined in the target template and a config_override using a list is being set
for the existing "key".

This change allows that functionality to be toggled on or off. The boolean
option to enable list extension is ``list_extend``.

To maintain the API this feature will remain True by default.

Co-Authored-By: Travis Truman <travis_truman@cable.comcast.com>
Change-Id: I97e06aef2cc778f048f3d6863fe61d10eddb8602
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>
2016-09-09 16:15:00 -05:00

467 lines
16 KiB
Python

# Copyright 2015, Rackspace US, Inc.
#
# 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.
try:
import ConfigParser
except ImportError:
import configparser as ConfigParser
import io
import json
import os
import re
import yaml
from ansible import errors
from ansible.runner.return_data import ReturnData
from ansible import utils
from ansible.utils import template
CONFIG_TYPES = {
'ini': 'return_config_overrides_ini',
'json': 'return_config_overrides_json',
'yaml': 'return_config_overrides_yaml'
}
class MultiKeyDict(dict):
"""Dictionary class which supports duplicate keys.
This class allows for an item to be added into a standard python dictionary
however if a key is created more than once the dictionary will convert the
singular value to a python set. This set type forces all values to be a
string.
Example Usage:
>>> z = MultiKeyDict()
>>> z['a'] = 1
>>> z['b'] = ['a', 'b', 'c']
>>> z['c'] = {'a': 1}
>>> print(z)
... {'a': 1, 'b': ['a', 'b', 'c'], 'c': {'a': 1}}
>>> z['a'] = 2
>>> print(z)
... {'a': set(['1', '2']), 'c': {'a': 1}, 'b': ['a', 'b', 'c']}
"""
def __setitem__(self, key, value):
if key in self:
if isinstance(self[key], set):
items = self[key]
items.add(str(value))
super(MultiKeyDict, self).__setitem__(key, items)
else:
items = [str(value), str(self[key])]
super(MultiKeyDict, self).__setitem__(key, set(items))
else:
return dict.__setitem__(self, key, value)
class ConfigTemplateParser(ConfigParser.RawConfigParser):
"""ConfigParser which supports multi key value.
The parser will use keys with multiple variables in a set as a multiple
key value within a configuration file.
Default Configuration file:
[DEFAULT]
things =
url1
url2
url3
other = 1,2,3
[section1]
key = var1
key = var2
key = var3
Example Usage:
>>> cp = ConfigTemplateParser(dict_type=MultiKeyDict)
>>> cp.read('/tmp/test.ini')
... ['/tmp/test.ini']
>>> cp.get('DEFAULT', 'things')
... \nurl1\nurl2\nurl3
>>> cp.get('DEFAULT', 'other')
... '1,2,3'
>>> cp.set('DEFAULT', 'key1', 'var1')
>>> cp.get('DEFAULT', 'key1')
... 'var1'
>>> cp.get('section1', 'key')
... {'var1', 'var2', 'var3'}
>>> cp.set('section1', 'key', 'var4')
>>> cp.get('section1', 'key')
... {'var1', 'var2', 'var3', 'var4'}
>>> with open('/tmp/test2.ini', 'w') as f:
... cp.write(f)
Output file:
[DEFAULT]
things =
url1
url2
url3
key1 = var1
other = 1,2,3
[section1]
key = var4
key = var1
key = var3
key = var2
"""
def _write(self, fp, section, item, entry):
if section:
if (item is not None) or (self._optcre == self.OPTCRE):
fp.write(entry)
else:
fp.write(entry)
def _write_check(self, fp, key, value, section=False):
if isinstance(value, set):
for item in value:
item = str(item).replace('\n', '\n\t')
entry = "%s = %s\n" % (key, item)
self._write(fp, section, item, entry)
else:
if isinstance(value, list):
_value = [str(i.replace('\n', '\n\t')) for i in value]
entry = '%s = %s\n' % (key, ','.join(_value))
else:
entry = '%s = %s\n' % (key, str(value).replace('\n', '\n\t'))
self._write(fp, section, value, entry)
def write(self, fp):
if self._defaults:
fp.write("[%s]\n" % 'DEFAULT')
for key, value in self._defaults.items():
self._write_check(fp, key=key, value=value)
else:
fp.write("\n")
for section in self._sections:
fp.write("[%s]\n" % section)
for key, value in self._sections[section].items():
self._write_check(fp, key=key, value=value, section=True)
else:
fp.write("\n")
def _read(self, fp, fpname):
cursect = None
optname = None
lineno = 0
e = None
while True:
line = fp.readline()
if not line:
break
lineno += 1
if line.strip() == '' or line[0] in '#;':
continue
if line.split(None, 1)[0].lower() == 'rem' and line[0] in "rR":
continue
if line[0].isspace() and cursect is not None and optname:
value = line.strip()
if value:
if isinstance(cursect[optname], set):
_temp_item = list(cursect[optname])
del cursect[optname]
cursect[optname] = _temp_item
elif isinstance(cursect[optname], (str, unicode)):
_temp_item = [cursect[optname]]
del cursect[optname]
cursect[optname] = _temp_item
cursect[optname].append(value)
else:
mo = self.SECTCRE.match(line)
if mo:
sectname = mo.group('header')
if sectname in self._sections:
cursect = self._sections[sectname]
elif sectname == 'DEFAULT':
cursect = self._defaults
else:
cursect = self._dict()
self._sections[sectname] = cursect
optname = None
elif cursect is None:
raise ConfigParser.MissingSectionHeaderError(
fpname,
lineno,
line
)
else:
mo = self._optcre.match(line)
if mo:
optname, vi, optval = mo.group('option', 'vi', 'value')
optname = self.optionxform(optname.rstrip())
if optval is not None:
if vi in ('=', ':') and ';' in optval:
pos = optval.find(';')
if pos != -1 and optval[pos - 1].isspace():
optval = optval[:pos]
optval = optval.strip()
if optval == '""':
optval = ''
cursect[optname] = optval
else:
if not e:
e = ConfigParser.ParsingError(fpname)
e.append(lineno, repr(line))
if e:
raise e
all_sections = [self._defaults]
all_sections.extend(self._sections.values())
for options in all_sections:
for name, val in options.items():
if isinstance(val, list):
_temp_item = '\n'.join(val)
del options[name]
options[name] = _temp_item
class ActionModule(object):
TRANSFERS_FILES = True
def __init__(self, runner):
self.runner = runner
@staticmethod
def grab_options(complex_args, module_args):
"""Grab passed options from Ansible complex and module args.
:param complex_args: ``dict``
:param module_args: ``dict``
:returns: ``dict``
"""
options = dict()
if complex_args:
options.update(complex_args)
options.update(utils.parse_kv(module_args))
return options
@staticmethod
def _option_write(config, section, key, value):
config.remove_option(str(section), str(key))
try:
if not any(i for i in value.values()):
value = set(value)
except AttributeError:
pass
if isinstance(value, set):
config.set(str(section), str(key), value)
elif isinstance(value, list):
config.set(str(section), str(key), ','.join(str(i) for i in value))
else:
config.set(str(section), str(key), str(value))
def return_config_overrides_ini(self, config_overrides, resultant, list_extend=True):
"""Returns string value from a modified config file.
:param config_overrides: ``dict``
:param resultant: ``str`` || ``unicode``
:returns: ``str``
"""
config = ConfigTemplateParser(
dict_type=MultiKeyDict,
allow_no_value=True
)
config.optionxform = str
config_object = io.BytesIO(resultant.encode('utf-8'))
config.readfp(config_object)
for section, items in config_overrides.items():
# If the items value is not a dictionary it is assumed that the
# value is a default item for this config type.
if not isinstance(items, dict):
if isinstance(items, list):
items = ','.join(items)
self._option_write(config, 'DEFAULT', section, items)
else:
# Attempt to add a section to the config file passing if
# an error is raised that is related to the section
# already existing.
try:
config.add_section(str(section))
except (ConfigParser.DuplicateSectionError, ValueError):
pass
for key, value in items.items():
self._option_write(config, section, key, value)
else:
config_object.close()
resultant_bytesio = io.BytesIO()
try:
config.write(resultant_bytesio)
return resultant_bytesio.getvalue()
finally:
resultant_bytesio.close()
def return_config_overrides_json(self, config_overrides, resultant, list_extend=True):
"""Returns config json
Its important to note that file ordering will not be preserved as the
information within the json file will be sorted by keys.
:param config_overrides: ``dict``
:param resultant: ``str`` || ``unicode``
:returns: ``str``
"""
original_resultant = json.loads(resultant)
merged_resultant = self._merge_dict(
base_items=original_resultant,
new_items=config_overrides,
list_extend=list_extend
)
return json.dumps(
merged_resultant,
indent=4,
sort_keys=True
)
def return_config_overrides_yaml(self, config_overrides, resultant, list_extend=True):
"""Return config yaml.
:param config_overrides: ``dict``
:param resultant: ``str`` || ``unicode``
:returns: ``str``
"""
original_resultant = yaml.safe_load(resultant)
merged_resultant = self._merge_dict(
base_items=original_resultant,
new_items=config_overrides,
list_extend=list_extend
)
return yaml.safe_dump(
merged_resultant,
default_flow_style=False,
width=1000,
)
def _merge_dict(self, base_items, new_items, list_extend=True):
"""Recursively merge new_items into base_items.
:param base_items: ``dict``
:param new_items: ``dict``
:returns: ``dict``
"""
for key, value in new_items.iteritems():
if isinstance(value, dict):
base_items[key] = self._merge_dict(
base_items.get(key, {}),
value
)
elif ',' in value or '\n' in value:
base_items[key] = re.split(', |,|\n', value)
base_items[key] = [i.strip() for i in base_items[key] if i]
elif isinstance(value, list):
if isinstance(base_items.get(key), list) and list_extend:
base_items[key].extend(value)
else:
base_items[key] = value
else:
base_items[key] = new_items[key]
return base_items
def run(self, conn, tmp, module_name, module_args, inject,
complex_args=None, **kwargs):
"""Run the method"""
if not self.runner.is_playbook:
raise errors.AnsibleError(
'FAILED: `config_templates` are only available in playbooks'
)
options = self.grab_options(complex_args, module_args)
try:
source = options['src']
dest = options['dest']
config_overrides = options.get('config_overrides', dict())
config_type = options['config_type']
assert config_type.lower() in ['ini', 'json', 'yaml']
except KeyError as exp:
result = dict(failed=True, msg=exp)
return ReturnData(conn=conn, comm_ok=False, result=result)
source_template = template.template(
self.runner.basedir,
source,
inject
)
if '_original_file' in inject:
source_file = utils.path_dwim_relative(
inject['_original_file'],
'templates',
source_template,
self.runner.basedir
)
else:
source_file = utils.path_dwim(self.runner.basedir, source_template)
# Open the template file and return the data as a string. This is
# being done here so that the file can be a vault encrypted file.
resultant = template.template_from_file(
self.runner.basedir,
source_file,
inject,
vault_password=self.runner.vault_pass
)
if config_overrides:
type_merger = getattr(self, CONFIG_TYPES.get(config_type))
resultant = type_merger(
config_overrides=config_overrides,
resultant=resultant,
list_extend=options.get('list_extend', True)
)
# Retemplate the resultant object as it may have new data within it
# as provided by an override variable.
template.template_from_string(
basedir=self.runner.basedir,
data=resultant,
vars=inject,
fail_on_undefined=True
)
# Access to protected method is unavoidable in Ansible 1.x.
new_module_args = dict(
src=self.runner._transfer_str(conn, tmp, 'source', resultant),
dest=dest,
original_basename=os.path.basename(source),
follow=True,
)
module_args_tmp = utils.merge_module_args(
module_args,
new_module_args
)
# Remove data types that are not available to the copy module
complex_args.pop('config_overrides')
complex_args.pop('config_type')
complex_args.pop('list_extend', None)
# Return the copy module status. Access to protected method is
# unavoidable in Ansible 1.x.
return self.runner._execute_module(
conn,
tmp,
'copy',
module_args_tmp,
inject=inject,
complex_args=complex_args
)