Current File : //proc/self/root/usr/lib/python2.7/site-packages/ansible/playbook/play.py
# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from ansible.compat.six import string_types
from ansible.errors import AnsibleParserError
from ansible.playbook.attribute import FieldAttribute
from ansible.playbook.base import Base
from ansible.playbook.become import Become
from ansible.playbook.block import Block
from ansible.playbook.helpers import load_list_of_blocks, load_list_of_roles
from ansible.playbook.role import Role
from ansible.playbook.taggable import Taggable
from ansible.vars import preprocess_vars
try:
from __main__ import display
except ImportError:
from ansible.utils.display import Display
display = Display()
__all__ = ['Play']
class Play(Base, Taggable, Become):
"""
A play is a language feature that represents a list of roles and/or
task/handler blocks to execute on a given set of hosts.
Usage:
Play.load(datastructure) -> Play
Play.something(...)
"""
# =================================================================================
# Connection-Related Attributes
# TODO: generalize connection
_accelerate = FieldAttribute(isa='bool', default=False, always_post_validate=True)
_accelerate_ipv6 = FieldAttribute(isa='bool', default=False, always_post_validate=True)
_accelerate_port = FieldAttribute(isa='int', default=5099, always_post_validate=True)
# Connection
_gather_facts = FieldAttribute(isa='bool', default=None, always_post_validate=True)
_gather_subset = FieldAttribute(isa='barelist', default=None, always_post_validate=True)
_gather_timeout = FieldAttribute(isa='int', default=None, always_post_validate=True)
_hosts = FieldAttribute(isa='list', required=True, listof=string_types, always_post_validate=True)
_name = FieldAttribute(isa='string', default='', always_post_validate=True)
# Variable Attributes
_vars_files = FieldAttribute(isa='list', default=[], priority=99)
_vars_prompt = FieldAttribute(isa='list', default=[], always_post_validate=True)
_vault_password = FieldAttribute(isa='string', always_post_validate=True)
# Role Attributes
_roles = FieldAttribute(isa='list', default=[], priority=90)
# Block (Task) Lists Attributes
_handlers = FieldAttribute(isa='list', default=[])
_pre_tasks = FieldAttribute(isa='list', default=[])
_post_tasks = FieldAttribute(isa='list', default=[])
_tasks = FieldAttribute(isa='list', default=[])
# Flag/Setting Attributes
_any_errors_fatal = FieldAttribute(isa='bool', default=False, always_post_validate=True)
_force_handlers = FieldAttribute(isa='bool', always_post_validate=True)
_max_fail_percentage = FieldAttribute(isa='percent', always_post_validate=True)
_serial = FieldAttribute(isa='list', default=[], always_post_validate=True)
_strategy = FieldAttribute(isa='string', default='linear', always_post_validate=True)
# =================================================================================
def __init__(self):
super(Play, self).__init__()
self._included_path = None
self._removed_hosts = []
self.ROLE_CACHE = {}
def __repr__(self):
return self.get_name()
def get_name(self):
''' return the name of the Play '''
return self._attributes.get('name')
@staticmethod
def load(data, variable_manager=None, loader=None):
if ('name' not in data or data['name'] is None) and 'hosts' in data:
if isinstance(data['hosts'], list):
data['name'] = ','.join(data['hosts'])
else:
data['name'] = data['hosts']
p = Play()
return p.load_data(data, variable_manager=variable_manager, loader=loader)
def preprocess_data(self, ds):
'''
Adjusts play datastructure to cleanup old/legacy items
'''
assert isinstance(ds, dict)
# The use of 'user' in the Play datastructure was deprecated to
# line up with the same change for Tasks, due to the fact that
# 'user' conflicted with the user module.
if 'user' in ds:
# this should never happen, but error out with a helpful message
# to the user if it does...
if 'remote_user' in ds:
raise AnsibleParserError("both 'user' and 'remote_user' are set for %s."
" The use of 'user' is deprecated, and should be removed" % self.get_name(), obj=ds)
ds['remote_user'] = ds['user']
del ds['user']
return super(Play, self).preprocess_data(ds)
def _load_tasks(self, attr, ds):
'''
Loads a list of blocks from a list which may be mixed tasks/blocks.
Bare tasks outside of a block are given an implicit block.
'''
try:
return load_list_of_blocks(ds=ds, play=self, variable_manager=self._variable_manager, loader=self._loader)
except AssertionError:
raise AnsibleParserError("A malformed block was encountered.", obj=self._ds)
def _load_pre_tasks(self, attr, ds):
'''
Loads a list of blocks from a list which may be mixed tasks/blocks.
Bare tasks outside of a block are given an implicit block.
'''
try:
return load_list_of_blocks(ds=ds, play=self, variable_manager=self._variable_manager, loader=self._loader)
except AssertionError:
raise AnsibleParserError("A malformed block was encountered.", obj=self._ds)
def _load_post_tasks(self, attr, ds):
'''
Loads a list of blocks from a list which may be mixed tasks/blocks.
Bare tasks outside of a block are given an implicit block.
'''
try:
return load_list_of_blocks(ds=ds, play=self, variable_manager=self._variable_manager, loader=self._loader)
except AssertionError:
raise AnsibleParserError("A malformed block was encountered.", obj=self._ds)
def _load_handlers(self, attr, ds):
'''
Loads a list of blocks from a list which may be mixed handlers/blocks.
Bare handlers outside of a block are given an implicit block.
'''
try:
return load_list_of_blocks(ds=ds, play=self, use_handlers=True, variable_manager=self._variable_manager, loader=self._loader)
except AssertionError:
raise AnsibleParserError("A malformed block was encountered.", obj=self._ds)
def _load_roles(self, attr, ds):
'''
Loads and returns a list of RoleInclude objects from the datastructure
list of role definitions and creates the Role from those objects
'''
if ds is None:
ds = []
try:
role_includes = load_list_of_roles(ds, play=self, variable_manager=self._variable_manager, loader=self._loader)
except AssertionError:
raise AnsibleParserError("A malformed role declaration was encountered.", obj=self._ds)
roles = []
for ri in role_includes:
roles.append(Role.load(ri, play=self))
return roles
def _load_vars_prompt(self, attr, ds):
new_ds = preprocess_vars(ds)
vars_prompts = []
for prompt_data in new_ds:
if 'name' not in prompt_data:
display.deprecated("Using the 'short form' for vars_prompt has been deprecated")
for vname, prompt in prompt_data.items():
vars_prompts.append(dict(
name = vname,
prompt = prompt,
default = None,
private = None,
confirm = None,
encrypt = None,
salt_size = None,
salt = None,
))
else:
vars_prompts.append(prompt_data)
return vars_prompts
def _compile_roles(self):
'''
Handles the role compilation step, returning a flat list of tasks
with the lowest level dependencies first. For example, if a role R
has a dependency D1, which also has a dependency D2, the tasks from
D2 are merged first, followed by D1, and lastly by the tasks from
the parent role R last. This is done for all roles in the Play.
'''
block_list = []
if len(self.roles) > 0:
for r in self.roles:
block_list.extend(r.compile(play=self))
return block_list
def compile_roles_handlers(self):
'''
Handles the role handler compilation step, returning a flat list of Handlers
This is done for all roles in the Play.
'''
block_list = []
if len(self.roles) > 0:
for r in self.roles:
block_list.extend(r.get_handler_blocks(play=self))
return block_list
def compile(self):
'''
Compiles and returns the task list for this play, compiled from the
roles (which are themselves compiled recursively) and/or the list of
tasks specified in the play.
'''
# create a block containing a single flush handlers meta
# task, so we can be sure to run handlers at certain points
# of the playbook execution
flush_block = Block.load(
data={'meta': 'flush_handlers'},
play=self,
variable_manager=self._variable_manager,
loader=self._loader
)
block_list = []
block_list.extend(self.pre_tasks)
block_list.append(flush_block)
block_list.extend(self._compile_roles())
block_list.extend(self.tasks)
block_list.append(flush_block)
block_list.extend(self.post_tasks)
block_list.append(flush_block)
return block_list
def get_vars(self):
return self.vars.copy()
def get_vars_files(self):
return self.vars_files
def get_handlers(self):
return self.handlers[:]
def get_roles(self):
return self.roles[:]
def get_tasks(self):
tasklist = []
for task in self.pre_tasks + self.tasks + self.post_tasks:
if isinstance(task, Block):
tasklist.append(task.block + task.rescue + task.always)
else:
tasklist.append(task)
return tasklist
def serialize(self):
data = super(Play, self).serialize()
roles = []
for role in self.get_roles():
roles.append(role.serialize())
data['roles'] = roles
data['included_path'] = self._included_path
return data
def deserialize(self, data):
super(Play, self).deserialize(data)
self._included_path = data.get('included_path', None)
if 'roles' in data:
role_data = data.get('roles', [])
roles = []
for role in role_data:
r = Role()
r.deserialize(role)
roles.append(r)
setattr(self, 'roles', roles)
del data['roles']
def copy(self):
new_me = super(Play, self).copy()
new_me.ROLE_CACHE = self.ROLE_CACHE.copy()
new_me._included_path = self._included_path
return new_me
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