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provisioner.py
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provisioner.py
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# Copyright (c) 2015-2016 Cisco Systems, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
import collections
import os
import yaml
import yaml.representer
import jinja2
from molecule import ansible_playbook
from molecule import util
class Ansible(object):
"""
`Ansible`_ is the default provisioner. No other provisioner will be
supported.
Additional options can be passed to `ansible-playbook` through the options
dict. Any option set in this section will override the defaults.
.. code-block:: yaml
provisioner:
name: ansible
options:
debug: True
"""
def __init__(self, config):
"""
A class encapsulating the provisioner.
:param config: An instance of a Molecule config.
:return: None
"""
self._config = config
self._setup()
@property
def default_options(self):
"""
Default CLI arguments provided to `ansible-playbook` and returns a
dict.
:return: dict
"""
d = {}
if self._config.args.get('debug'):
d['debug'] = True
return d
@property
def name(self):
return self._config.config['provisioner']['name']
@property
def options(self):
return self._config.merge_dicts(
self.default_options,
self._config.config['provisioner']['options'])
@property
def inventory(self):
# ungrouped:
# hosts:
# instance-1-default:
# instance-2-default:
# $group_name:
# hosts:
# instance-1-default:
# ansible_connection: docker
# instance-2-default:
# ansible_connection: docker
dd = vivify()
for platform in self._config.platforms:
for group in platform.get('groups', ['ungrouped']):
name = '{}-{}'.format(platform['name'],
self._config.scenario.name)
connection_options = self._config.driver.connection_options
dd[group]['hosts'][name] = connection_options
return dd
@property
def inventory_file(self):
return os.path.join(self._config.ephemeral_directory,
'ansible_inventory.yml')
@property
def config_file(self):
return os.path.join(self._config.ephemeral_directory, 'ansible.cfg')
def converge(self, inventory, playbook):
"""
Executes `ansible-playbook` and returns None.
:return: None
"""
apb = ansible_playbook.AnsiblePlaybook(inventory, playbook,
self._config)
apb.execute()
def write_inventory(self):
"""
Writes the provisioner's inventory file to disk and returns None.
:return: None
"""
self._verify_inventory()
yaml.add_representer(collections.defaultdict,
yaml.representer.Representer.represent_dict)
with open(self.inventory_file, 'w') as f:
f.write(yaml.dump(self.inventory))
def write_config(self):
"""
Writes the provisioner's config file to disk and returns None.
:return: None
"""
# self._verify_config()
template = jinja2.Environment().from_string(self._get_config_template(
)).render()
with open(self.config_file, 'w') as f:
f.write(template)
def _setup(self):
"""
Prepare the system for using the provisioner and returns None.
:return: None
"""
if not os.path.isdir(self._config.ephemeral_directory):
os.mkdir(self._config.ephemeral_directory)
self.write_inventory()
self.write_config()
def _verify_inventory(self):
"""
Verify the inventory is valid and returns None.
:return: None
"""
if not self.inventory:
msg = ("Instances missing from the 'platform' "
"section of molecule.yml.")
util.print_error(msg)
util.sysexit()
def _get_config_template(self):
"""
Returns a config template string.
:return: str
"""
return """
# Molecule managed
[defaults]
roles_path = ../../../../
ansible_managed = Ansible managed: Do NOT edit this file manually!
retry_files_enabled = False
"""
def vivify():
return collections.defaultdict(vivify)