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Reworking v2 play iterator and fixing some other bugs

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Still not working quite right:
* dynamic includes are not adding the included tasks yet
* running roles with tags not quite working right
pull/10388/head
James Cammarata 10 years ago
parent fbc525cfb6
commit 4af2d0a907
28 changed files with 428 additions and 416 deletions
Show Stats Download Patch File Download Diff File

66
v2/ansible/executor/manager.py
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@ -1,66 +0,0 @@
# (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 multiprocessing.managers import SyncManager, BaseProxy
from ansible.playbook.handler import Handler
from ansible.playbook.task import Task
from ansible.playbook.play import Play
from ansible.errors import AnsibleError
__all__ = ['AnsibleManager']
class VariableManagerWrapper:
'''
This class simply acts as a wrapper around the VariableManager class,
since manager proxies expect a new object to be returned rather than
any existing one. Using this wrapper, a shared proxy can be created
and an existing VariableManager class assigned to it, which can then
be accessed through the exposed proxy methods.
'''
def __init__(self):
self._vm = None
def get_vars(self, loader, play=None, host=None, task=None):
return self._vm.get_vars(loader=loader, play=play, host=host, task=task)
def set_variable_manager(self, vm):
self._vm = vm
def set_host_variable(self, host, varname, value):
self._vm.set_host_variable(host, varname, value)
def set_host_facts(self, host, facts):
self._vm.set_host_facts(host, facts)
class AnsibleManager(SyncManager):
'''
This is our custom manager class, which exists only so we may register
the new proxy below
'''
pass
AnsibleManager.register(
typeid='VariableManagerWrapper',
callable=VariableManagerWrapper,
)

410
v2/ansible/executor/play_iterator.py
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@ -26,278 +26,202 @@ from ansible.utils.boolean import boolean
__all__ = ['PlayIterator']
class HostState:
def __init__(self, blocks):
self._blocks = blocks[:]
self.cur_block = 0
self.cur_regular_task = 0
self.cur_rescue_task = 0
self.cur_always_task = 0
self.cur_role = None
self.run_state = PlayIterator.ITERATING_SETUP
self.fail_state = PlayIterator.FAILED_NONE
self.pending_setup = False
def get_current_block(self):
return self._blocks[self.cur_block]
def copy(self):
new_state = HostState(self._blocks)
new_state.cur_block = self.cur_block
new_state.cur_regular_task = self.cur_regular_task
new_state.cur_rescue_task = self.cur_rescue_task
new_state.cur_always_task = self.cur_always_task
new_state.cur_role = self.cur_role
new_state.run_state = self.run_state
new_state.fail_state = self.fail_state
new_state.pending_setup = self.pending_setup
return new_state
# the primary running states for the play iteration
ITERATING_SETUP = 0
ITERATING_TASKS = 1
ITERATING_RESCUE = 2
ITERATING_ALWAYS = 3
ITERATING_COMPLETE = 4
# the failure states for the play iteration
FAILED_NONE = 0
FAILED_SETUP = 1
FAILED_TASKS = 2
FAILED_RESCUE = 3
FAILED_ALWAYS = 4
class PlayState:
'''
A helper class, which keeps track of the task iteration
state for a given playbook. This is used in the PlaybookIterator
class on a per-host basis.
'''
class PlayIterator:
# the primary running states for the play iteration
ITERATING_SETUP = 0
ITERATING_TASKS = 1
ITERATING_RESCUE = 2
ITERATING_ALWAYS = 3
ITERATING_COMPLETE = 4
# the failure states for the play iteration, which are powers
# of 2 as they may be or'ed together in certain circumstances
FAILED_NONE = 0
FAILED_SETUP = 1
FAILED_TASKS = 2
FAILED_RESCUE = 4
FAILED_ALWAYS = 8
# FIXME: this class is the representation of a finite state machine,
# so we really should have a well defined state representation
# documented somewhere...
def __init__(self, inventory, play):
# FIXME: should we save the post_validated play from below here instead?
self._play = play
def __init__(self, parent_iterator, host):
'''
Create the initial state, which tracks the running state as well
as the failure state, which are used when executing block branches
(rescue/always)
'''
# post validate the play, as we need some fields to be finalized now
# so that we can use them to setup the iterator properly
all_vars = inventory._variable_manager.get_vars(loader=inventory._loader, play=play)
new_play = play.copy()
new_play.post_validate(all_vars, fail_on_undefined=False)
self._parent_iterator = parent_iterator
self._run_state = ITERATING_SETUP
self._failed_state = FAILED_NONE
self._gather_facts = parent_iterator._play.gather_facts
#self._task_list = parent_iterator._play.compile()
self._task_list = parent_iterator._task_list[:]
self._host = host
self._blocks = new_play.compile()
self._host_states = {}
for host in inventory.get_hosts(new_play.hosts):
self._host_states[host.name] = HostState(blocks=self._blocks)
self._cur_block = None
self._cur_role = None
self._cur_task_pos = 0
self._cur_rescue_pos = 0
self._cur_always_pos = 0
self._cur_handler_pos = 0
def get_host_state(self, host):
try:
return self._host_states[host.name].copy()
except KeyError:
raise AnsibleError("invalid host (%s) specified for playbook iteration" % host)
def next(self, peek=False):
'''
Determines and returns the next available task from the playbook,
advancing through the list of plays as it goes. If peek is set to True,
the internal state is not stored.
'''
def get_next_task_for_host(self, host, peek=False, lock_step=True):
s = self.get_host_state(host)
task = None
if s.run_state == self.ITERATING_COMPLETE:
return None
else:
while True:
try:
cur_block = s._blocks[s.cur_block]
except IndexError:
s.run_state = self.ITERATING_COMPLETE
break
# save this locally so that we can peek at the next task
# without updating the internal state of the iterator
run_state = self._run_state
failed_state = self._failed_state
cur_block = self._cur_block
cur_role = self._cur_role
cur_task_pos = self._cur_task_pos
cur_rescue_pos = self._cur_rescue_pos
cur_always_pos = self._cur_always_pos
cur_handler_pos = self._cur_handler_pos
while True:
if run_state == ITERATING_SETUP:
if failed_state == FAILED_SETUP:
run_state = ITERATING_COMPLETE
else:
run_state = ITERATING_TASKS
if s.run_state == self.ITERATING_SETUP:
s.run_state = self.ITERATING_TASKS
if self._play._gather_facts == 'smart' and not host.gathered_facts or boolean(self._play._gather_facts):
# mark the host as having gathered facts
host.set_gathered_facts(True)
if self._gather_facts == 'smart' and not self._host.gathered_facts or boolean(self._gather_facts):
self._host.set_gathered_facts(True)
task = Task()
# FIXME: this is not the best way to get this...
task.set_loader(self._parent_iterator._play._loader)
task.action = 'setup'
break
elif run_state == ITERATING_TASKS:
# if there is any failure state besides FAILED_NONE, we should
# change to some other running state
if failed_state != FAILED_NONE or cur_task_pos > len(self._task_list) - 1:
# if there is a block (and there always should be), start running
# the rescue portion if it exists (and if we haven't failed that
# already), or the always portion (if it exists and we didn't fail
# there too). Otherwise, we're done iterating.
if cur_block:
if failed_state != FAILED_RESCUE and cur_block.rescue:
run_state = ITERATING_RESCUE
cur_rescue_pos = 0
elif failed_state != FAILED_ALWAYS and cur_block.always:
run_state = ITERATING_ALWAYS
cur_always_pos = 0
else:
run_state = ITERATING_COMPLETE
else:
run_state = ITERATING_COMPLETE
else:
task = self._task_list[cur_task_pos]
if cur_block is not None and cur_block != task._block:
run_state = ITERATING_ALWAYS
continue
else:
cur_block = task._block
cur_task_pos += 1
task.set_loader(self._play._loader)
# Break out of the while loop now that we have our task
break
elif s.run_state == self.ITERATING_TASKS:
# clear the pending setup flag, since we're past that and it didn't fail
if s.pending_setup:
s.pending_setup = False
elif run_state == ITERATING_RESCUE:
# If we're iterating through the rescue tasks, make sure we haven't
# failed yet. If so, move on to the always block or if not get the
# next rescue task (if one exists)
if failed_state == FAILED_RESCUE or cur_block.rescue is None or cur_rescue_pos > len(cur_block.rescue) - 1:
run_state = ITERATING_ALWAYS
else:
task = cur_block.rescue[cur_rescue_pos]
cur_rescue_pos += 1
break
elif run_state == ITERATING_ALWAYS:
# If we're iterating through the always tasks, make sure we haven't
# failed yet. If so, we're done iterating otherwise get the next always
# task (if one exists)
if failed_state == FAILED_ALWAYS or cur_block.always is None or cur_always_pos > len(cur_block.always) - 1:
cur_block = None
if failed_state == FAILED_ALWAYS or cur_task_pos > len(self._task_list) - 1:
run_state = ITERATING_COMPLETE
if s.fail_state & self.FAILED_TASKS == self.FAILED_TASKS:
s.run_state = self.ITERATING_RESCUE
elif s.cur_regular_task >= len(cur_block.block):
s.run_state = self.ITERATING_ALWAYS
else:
run_state = ITERATING_TASKS
else:
task = cur_block.always[cur_always_pos]
cur_always_pos += 1
break
elif run_state == ITERATING_COMPLETE:
# done iterating, return None to signify that
return None
task = cur_block.block[s.cur_regular_task]
s.cur_regular_task += 1
break
elif s.run_state == self.ITERATING_RESCUE:
if s.fail_state & self.FAILED_RESCUE == self.FAILED_RESCUE:
s.run_state = self.ITERATING_ALWAYS
elif s.cur_rescue_task >= len(cur_block.rescue):
if len(cur_block.rescue) > 0:
s.fail_state = self.FAILED_NONE
s.run_state = self.ITERATING_ALWAYS
else:
task = cur_block.rescue[s.cur_rescue_task]
s.cur_rescue_task += 1
break
elif s.run_state == self.ITERATING_ALWAYS:
if s.cur_always_task >= len(cur_block.always):
if s.fail_state != self.FAILED_NONE:
s.run_state = self.ITERATING_COMPLETE
break
else:
s.cur_block += 1
s.cur_regular_task = 0
s.cur_rescue_task = 0
s.cur_always_task = 0
s.run_state = self.ITERATING_TASKS
else:
task= cur_block.always[s.cur_always_task]
s.cur_always_task += 1
break
if task._role:
if task and task._role:
# if we had a current role, mark that role as completed
if cur_role and task._role != cur_role and not peek:
cur_role._completed = True
if s.cur_role and task._role != s.cur_role and s.cur_role._had_task_run and not peek:
s.cur_role._completed = True
cur_role = task._role
s.cur_role = task._role
# if the current role has not had its task run flag set, mark
# clear the completed flag so we can correctly determine if the
# role was run
if not cur_role._had_task_run and not peek:
cur_role._completed = False
# If we're not just peeking at the next task, save the internal state
if not peek:
self._run_state = run_state
self._failed_state = failed_state
self._cur_block = cur_block
self._cur_role = cur_role
self._cur_task_pos = cur_task_pos
self._cur_rescue_pos = cur_rescue_pos
self._cur_always_pos = cur_always_pos
self._cur_handler_pos = cur_handler_pos
self._host_states[host.name] = s
return task
def mark_failed(self):
'''
Escalates the failed state relative to the running state.
'''
if self._run_state == ITERATING_SETUP:
self._failed_state = FAILED_SETUP
elif self._run_state == ITERATING_TASKS:
self._failed_state = FAILED_TASKS
elif self._run_state == ITERATING_RESCUE:
self._failed_state = FAILED_RESCUE
elif self._run_state == ITERATING_ALWAYS:
self._failed_state = FAILED_ALWAYS
def add_tasks(self, task_list):
if self._run_state == ITERATING_TASKS:
before = self._task_list[:self._cur_task_pos]
after = self._task_list[self._cur_task_pos:]
self._task_list = before + task_list + after
elif self._run_state == ITERATING_RESCUE:
before = self._cur_block.rescue[:self._cur_rescue_pos]
after = self._cur_block.rescue[self._cur_rescue_pos:]
self._cur_block.rescue = before + task_list + after
elif self._run_state == ITERATING_ALWAYS:
before = self._cur_block.always[:self._cur_always_pos]
after = self._cur_block.always[self._cur_always_pos:]
self._cur_block.always = before + task_list + after
class PlayIterator:
'''
The main iterator class, which keeps the state of the playbook
on a per-host basis using the above PlaybookState class.
'''
def __init__(self, inventory, play):
self._play = play
self._inventory = inventory
self._host_entries = dict()
self._first_host = None
# Build the per-host dictionary of playbook states, using a copy
# of the play object so we can post_validate it to ensure any templated
# fields are filled in without modifying the original object, since
# post_validate() saves the templated values.
# FIXME: this is a hacky way of doing this, the iterator should
# instead get the loader and variable manager directly
# as args to __init__
all_vars = inventory._variable_manager.get_vars(loader=inventory._loader, play=play)
new_play = play.copy()
new_play.post_validate(all_vars, fail_on_undefined=False)
self._task_list = new_play.compile()
for host in inventory.get_hosts(new_play.hosts):
if self._first_host is None:
self._first_host = host
self._host_entries[host.get_name()] = PlayState(parent_iterator=self, host=host)
# FIXME: remove, probably not required anymore
#def get_next_task(self, peek=False):
# ''' returns the next task for host[0] '''
#
# first_entry = self._host_entries[self._first_host.get_name()]
# if not peek:
# for entry in self._host_entries:
# if entry != self._first_host.get_name():
# target_entry = self._host_entries[entry]
# if target_entry._cur_task_pos == first_entry._cur_task_pos:
# target_entry.next()
# return first_entry.next(peek=peek)
def get_next_task_for_host(self, host, peek=False):
''' fetch the next task for the given host '''
if host.get_name() not in self._host_entries:
raise AnsibleError("invalid host (%s) specified for playbook iteration" % host)
return self._host_entries[host.get_name()].next(peek=peek)
return (s, task)
def mark_host_failed(self, host):
''' mark the given host as failed '''
if host.get_name() not in self._host_entries:
raise AnsibleError("invalid host (%s) specified for playbook iteration" % host)
self._host_entries[host.get_name()].mark_failed()
def get_original_task(self, task):
s = self.get_host_state(host)
if s.pending_setup:
s.fail_state |= self.FAILED_SETUP
s.run_state = self.ITERATING_COMPLETE
elif s.run_state == self.ITERATING_TASKS:
s.fail_state |= self.FAILED_TASKS
s.run_state = self.ITERATING_RESCUE
elif s.run_state == self.ITERATING_RESCUE:
s.fail_state |= self.FAILED_RESCUE
s.run_state = self.ITERATING_ALWAYS
elif s.run_state == self.ITERATING_ALWAYS:
s.fail_state |= self.FAILED_ALWAYS
s.run_state = self.ITERATING_COMPLETE
self._host_states[host.name] = s
def get_failed_hosts(self):
return dict((host, True) for (host, state) in self._host_states.iteritems() if state.run_state == self.ITERATING_COMPLETE and state.failed_state != self.FAILED_NONE)
def get_original_task(self, host, task):
'''
Finds the task in the task list which matches the UUID of the given task.
The executor engine serializes/deserializes objects as they are passed through
the different processes, and not all data structures are preserved. This method
allows us to find the original task passed into the executor engine.
'''
for t in self._task_list:
if t._uuid == task._uuid:
return t
for block in self._blocks:
if block.block:
for t in block.block:
if t._uuid == task._uuid:
return t
if block.rescue:
for t in block.rescue:
if t._uuid == task._uuid:
return t
if block.always:
for t in block.always:
if t._uuid == task._uuid:
return t
return None
def add_tasks(self, host, task_list):
if host.name not in self._host_entries:
raise AnsibleError("invalid host (%s) specified for playbook iteration (expanding task list)" % host)
def add_tasks(self, task_list):
if self._run_state == self.ITERATING_TASKS:
before = self._task_list[:self._cur_task_pos + self._tasks_added]
after = self._task_list[self._cur_task_pos + self._tasks_added:]
self._task_list = before + task_list + after
elif self._run_state == self.ITERATING_RESCUE:
before = self._cur_block.rescue[:self._cur_rescue_pos + self._tasks_added]
after = self._cur_block.rescue[self._cur_rescue_pos + self._tasks_added:]
self._cur_block.rescue = before + task_list + after
elif self._run_state == self.ITERATING_ALWAYS:
before = self._cur_block.always[:self._cur_always_pos + self._tasks_added]
after = self._cur_block.always[self._cur_always_pos + self._tasks_added:]
self._cur_block.always = before + task_list + after
# set this internal flag now so we know if
self._tasks_added += len(task_list)
self._host_entries[host.name].add_tasks(task_list)

13
v2/ansible/executor/process/result.py
Unescape Escape View File

@ -137,12 +137,13 @@ class ResultProcess(multiprocessing.Process):
result_items = [ result._result ]
for result_item in result_items:
if 'include' in result_item:
include_variables = result_item.get('include_variables', dict())
if 'item' in result_item:
include_variables['item'] = result_item['item']
self._send_result(('include', result._host, result._task, result_item['include'], include_variables))
elif 'add_host' in result_item:
#if 'include' in result_item:
# include_variables = result_item.get('include_variables', dict())
# if 'item' in result_item:
# include_variables['item'] = result_item['item']
# self._send_result(('include', result._host, result._task, result_item['include'], include_variables))
#elif 'add_host' in result_item:
if 'add_host' in result_item:
# this task added a new host (add_host module)
self._send_result(('add_host', result_item))
elif 'add_group' in result_item:

5
v2/ansible/executor/task_executor.py
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@ -132,13 +132,14 @@ class TaskExecutor:
res = self._execute(variables=task_vars)
(self._task, tmp_task) = (tmp_task, self._task)
# FIXME: we should be sending back a callback result for each item in the loop here
# now update the result with the item info, and append the result
# to the list of results
res['item'] = item
results.append(res)
# FIXME: we should be sending back a callback result for each item in the loop here
print(res)
return results
def _squash_items(self, items, variables):

6
v2/ansible/executor/task_queue_manager.py
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@ -26,7 +26,6 @@ import sys
from ansible.errors import AnsibleError
from ansible.executor.connection_info import ConnectionInformation
#from ansible.executor.manager import AnsibleManager
from ansible.executor.play_iterator import PlayIterator
from ansible.executor.process.worker import WorkerProcess
from ansible.executor.process.result import ResultProcess
@ -36,7 +35,6 @@ from ansible.utils.debug import debug
__all__ = ['TaskQueueManager']
class TaskQueueManager:
'''
@ -59,10 +57,6 @@ class TaskQueueManager:
# a special flag to help us exit cleanly
self._terminated = False
# create and start the multiprocessing manager
#self._manager = AnsibleManager()
#self._manager.start()
# this dictionary is used to keep track of notified handlers
self._notified_handlers = dict()

2
v2/ansible/playbook/base.py
Unescape Escape View File

@ -273,7 +273,7 @@ class Base:
if needle in self._attributes:
return self._attributes[needle]
raise AttributeError("attribute not found: %s" % needle)
raise AttributeError("attribute not found in %s: %s" % (self.__class__.__name__, needle))
def __getstate__(self):
return self.serialize()

21
v2/ansible/playbook/block.py
Unescape Escape View File

@ -28,9 +28,9 @@ from ansible.playbook.taggable import Taggable
class Block(Base, Conditional, Taggable):
_block = FieldAttribute(isa='list')
_rescue = FieldAttribute(isa='list')
_always = FieldAttribute(isa='list')
_block = FieldAttribute(isa='list', default=[])
_rescue = FieldAttribute(isa='list', default=[])
_always = FieldAttribute(isa='list', default=[])
# for future consideration? this would be functionally
# similar to the 'else' clause for exceptions
@ -41,6 +41,7 @@ class Block(Base, Conditional, Taggable):
self._role = role
self._task_include = task_include
self._use_handlers = use_handlers
self._dep_chain = []
super(Block, self).__init__()
@ -141,6 +142,7 @@ class Block(Base, Conditional, Taggable):
def copy(self):
new_me = super(Block, self).copy()
new_me._use_handlers = self._use_handlers
new_me._dep_chain = self._dep_chain[:]
new_me._parent_block = None
if self._parent_block:
@ -163,6 +165,7 @@ class Block(Base, Conditional, Taggable):
'''
data = dict(when=self.when)
data['dep_chain'] = self._dep_chain
if self._role is not None:
data['role'] = self._role.serialize()
@ -177,11 +180,11 @@ class Block(Base, Conditional, Taggable):
serialize method
'''
#from ansible.playbook.task_include import TaskInclude
from ansible.playbook.task import Task
# unpack the when attribute, which is the only one we want
self.when = data.get('when')
self._dep_chain = data.get('dep_chain', [])
# if there was a serialized role, unpack it too
role_data = data.get('role')
@ -198,6 +201,10 @@ class Block(Base, Conditional, Taggable):
self._task_include = ti
def evaluate_conditional(self, all_vars):
if len(self._dep_chain):
for dep in self._dep_chain:
if not dep.evaluate_conditional(all_vars):
return False
if self._task_include is not None:
if not self._task_include.evaluate_conditional(all_vars):
return False
@ -211,6 +218,9 @@ class Block(Base, Conditional, Taggable):
def evaluate_tags(self, only_tags, skip_tags, all_vars):
result = False
if len(self._dep_chain):
for dep in self._dep_chain:
result |= dep.evaluate_tags(only_tags=only_tags, skip_tags=skip_tags, all_vars=all_vars)
if self._parent_block is not None:
result |= self._parent_block.evaluate_tags(only_tags=only_tags, skip_tags=skip_tags, all_vars=all_vars)
elif self._role is not None:
@ -227,3 +237,6 @@ class Block(Base, Conditional, Taggable):
if self._task_include:
self._task_include.set_loader(loader)
for dep in self._dep_chain:
dep.set_loader(loader)

18
v2/ansible/playbook/play.py
Unescape Escape View File

@ -198,13 +198,13 @@ class Play(Base, Taggable):
the parent role R last. This is done for all roles in the Play.
'''
task_list = []
block_list = []
if len(self.roles) > 0:
for r in self.roles:
task_list.extend(r.compile())
block_list.extend(r.compile())
return task_list
return block_list
def compile(self):
'''
@ -213,14 +213,14 @@ class Play(Base, Taggable):
tasks specified in the play.
'''
task_list = []
block_list = []
task_list.extend(compile_block_list(self.pre_tasks))
task_list.extend(self._compile_roles())
task_list.extend(compile_block_list(self.tasks))
task_list.extend(compile_block_list(self.post_tasks))
block_list.extend(self.pre_tasks)
block_list.extend(self._compile_roles())
block_list.extend(self.tasks)
block_list.extend(self.post_tasks)
return task_list
return block_list
def get_vars(self):
return self.vars.copy()

16
v2/ansible/playbook/role/__init__.py
Unescape Escape View File

@ -304,25 +304,25 @@ class Role(Base, Conditional, Taggable):
can correctly take their parent's tags/conditionals into account.
'''
task_list = []
block_list = []
# update the dependency chain here
new_dep_chain = dep_chain + [self]
deps = self.get_direct_dependencies()
for dep in deps:
dep_tasks = dep.compile(dep_chain=new_dep_chain)
for dep_task in dep_tasks:
dep_blocks = dep.compile(dep_chain=new_dep_chain)
for dep_block in dep_blocks:
# since we're modifying the task, and need it to be unique,
# we make a copy of it here and assign the dependency chain
# to the copy, then append the copy to the task list.
new_dep_task = dep_task.copy()
new_dep_task._dep_chain = new_dep_chain
task_list.append(new_dep_task)
new_dep_block = dep_block.copy()
new_dep_block._dep_chain = new_dep_chain
block_list.append(new_dep_block)
task_list.extend(compile_block_list(self._task_blocks))
block_list.extend(self._task_blocks)
return task_list
return block_list
def serialize(self, include_deps=True):
res = super(Role, self).serialize()

13
v2/ansible/playbook/task.py
Unescape Escape View File

@ -102,7 +102,6 @@ class Task(Base, Conditional, Taggable):
self._block = block
self._role = role
self._task_include = task_include
self._dep_chain = []
super(Task, self).__init__()
@ -226,7 +225,6 @@ class Task(Base, Conditional, Taggable):
def copy(self):
new_me = super(Task, self).copy()
new_me._dep_chain = self._dep_chain[:]
new_me._block = None
if self._block:
@ -244,7 +242,6 @@ class Task(Base, Conditional, Taggable):
def serialize(self):
data = super(Task, self).serialize()
data['dep_chain'] = self._dep_chain
if self._block:
data['block'] = self._block.serialize()
@ -263,7 +260,6 @@ class Task(Base, Conditional, Taggable):
#from ansible.playbook.task_include import TaskInclude
block_data = data.get('block')
self._dep_chain = data.get('dep_chain', [])
if block_data:
b = Block()
@ -289,10 +285,6 @@ class Task(Base, Conditional, Taggable):
super(Task, self).deserialize(data)
def evaluate_conditional(self, all_vars):
if len(self._dep_chain):
for dep in self._dep_chain:
if not dep.evaluate_conditional(all_vars):
return False
if self._block is not None:
if not self._block.evaluate_conditional(all_vars):
return False
@ -303,9 +295,6 @@ class Task(Base, Conditional, Taggable):
def evaluate_tags(self, only_tags, skip_tags, all_vars):
result = False
if len(self._dep_chain):
for dep in self._dep_chain:
result |= dep.evaluate_tags(only_tags=only_tags, skip_tags=skip_tags, all_vars=all_vars)
if self._block is not None:
result |= self._block.evaluate_tags(only_tags=only_tags, skip_tags=skip_tags, all_vars=all_vars)
return result | super(Task, self).evaluate_tags(only_tags=only_tags, skip_tags=skip_tags, all_vars=all_vars)
@ -324,5 +313,3 @@ class Task(Base, Conditional, Taggable):
if self._task_include:
self._task_include.set_loader(loader)
for dep in self._dep_chain:
dep.set_loader(loader)

59
v2/ansible/plugins/strategies/__init__.py
Unescape Escape View File

@ -68,8 +68,8 @@ class StrategyBase:
num_failed = len(self._tqm._failed_hosts)
num_unreachable = len(self._tqm._unreachable_hosts)
debug("running the cleanup portion of the play")
result &= self.cleanup(iterator, connection_info)
#debug("running the cleanup portion of the play")
#result &= self.cleanup(iterator, connection_info)
debug("running handlers")
result &= self.run_handlers(iterator, connection_info)
@ -131,6 +131,7 @@ class StrategyBase:
if result[0] == 'host_task_failed':
if not task.ignore_errors:
debug("marking %s as failed" % host.get_name())
iterator.mark_host_failed(host)
self._tqm._failed_hosts[host.get_name()] = True
self._callback.runner_on_failed(task, task_result)
elif result[0] == 'host_unreachable':
@ -151,26 +152,25 @@ class StrategyBase:
# lookup the role in the ROLE_CACHE to make sure we're dealing
# with the correct object and mark it as executed
for (entry, role_obj) in ROLE_CACHE[task_result._task._role._role_name].iteritems():
#hashed_entry = frozenset(task_result._task._role._role_params.iteritems())
hashed_entry = hash_params(task_result._task._role._role_params)
if entry == hashed_entry :
role_obj._had_task_run = True
elif result[0] == 'include':
host = result[1]
task = result[2]
include_file = result[3]
include_vars = result[4]
if isinstance(task, Handler):
# FIXME: figure out how to make includes work for handlers
pass
else:
original_task = iterator.get_original_task(task)
if original_task._role:
include_file = self._loader.path_dwim_relative(original_task._role._role_path, 'tasks', include_file)
new_tasks = self._load_included_file(original_task, include_file, include_vars)
iterator.add_tasks(host, new_tasks)
#elif result[0] == 'include':
# host = result[1]
# task = result[2]
# include_file = result[3]
# include_vars = result[4]
#
# if isinstance(task, Handler):
# # FIXME: figure out how to make includes work for handlers
# pass
# else:
# original_task = iterator.get_original_task(host, task)
# if original_task and original_task._role:
# include_file = self._loader.path_dwim_relative(original_task._role._role_path, 'tasks', include_file)
# new_tasks = self._load_included_file(original_task, include_file, include_vars)
# iterator.add_tasks(host, new_tasks)
elif result[0] == 'add_host':
task_result = result[1]
@ -314,6 +314,8 @@ class StrategyBase:
task_list = compile_block_list(block_list)
# set the vars for this task from those specified as params to the include
for t in task_list:
t.vars = include_vars.copy()
@ -355,18 +357,21 @@ class StrategyBase:
iterator.mark_host_failed(host)
del self._tqm._failed_hosts[host_name]
if host_name not in self._tqm._unreachable_hosts and iterator.get_next_task_for_host(host, peek=True):
if host_name in self._blocked_hosts:
work_to_do = True
continue
elif iterator.get_next_task_for_host(host, peek=True) and host_name not in self._tqm._unreachable_hosts:
work_to_do = True
# check to see if this host is blocked (still executing a previous task)
if not host_name in self._blocked_hosts:
# pop the task, mark the host blocked, and queue it
self._blocked_hosts[host_name] = True
task = iterator.get_next_task_for_host(host)
task_vars = self._variable_manager.get_vars(loader=self._loader, play=iterator._play, host=host, task=task)
self._callback.playbook_on_cleanup_task_start(task.get_name())
self._queue_task(host, task, task_vars, connection_info)
# pop the task, mark the host blocked, and queue it
self._blocked_hosts[host_name] = True
task = iterator.get_next_task_for_host(host)
task_vars = self._variable_manager.get_vars(loader=self._loader, play=iterator._play, host=host, task=task)
self._callback.playbook_on_cleanup_task_start(task.get_name())
self._queue_task(host, task, task_vars, connection_info)
self._process_pending_results(iterator)
time.sleep(0.01)
# no more work, wait until the queue is drained
self._wait_on_pending_results(iterator)

140
v2/ansible/plugins/strategies/linear.py
Unescape Escape View File

@ -20,11 +20,96 @@ from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from ansible.errors import AnsibleError
from ansible.executor.play_iterator import PlayIterator
from ansible.playbook.task import Task
from ansible.plugins.strategies import StrategyBase
from ansible.utils.debug import debug
class StrategyModule(StrategyBase):
def _get_next_task_lockstep(self, hosts, iterator):
'''
Returns a list of (host, task) tuples, where the task may
be a noop task to keep the iterator in lock step across
all hosts.
'''
noop_task = Task()
noop_task.action = 'meta'
noop_task.args['_raw_params'] = 'noop'
noop_task.set_loader(iterator._play._loader)
host_tasks = {}
for host in hosts:
host_tasks[host.name] = iterator.get_next_task_for_host(host, peek=True)
num_setups = 0
num_tasks = 0
num_rescue = 0
num_always = 0
lowest_cur_block = len(iterator._blocks)
for (k, v) in host_tasks.iteritems():
(s, t) = v
if s.cur_block < lowest_cur_block and s.run_state != PlayIterator.ITERATING_COMPLETE:
lowest_cur_block = s.cur_block
if s.run_state == PlayIterator.ITERATING_SETUP:
num_setups += 1
elif s.run_state == PlayIterator.ITERATING_TASKS:
num_tasks += 1
elif s.run_state == PlayIterator.ITERATING_RESCUE:
num_rescue += 1
elif s.run_state == PlayIterator.ITERATING_ALWAYS:
num_always += 1
def _advance_selected_hosts(hosts, cur_block, cur_state):
'''
This helper returns the task for all hosts in the requested
state, otherwise they get a noop dummy task. This also advances
the state of the host, since the given states are determined
while using peek=True.
'''
# we return the values in the order they were originally
# specified in the given hosts array
rvals = []
for host in hosts:
(s, t) = host_tasks[host.name]
if s.run_state == cur_state and s.cur_block == cur_block:
new_t = iterator.get_next_task_for_host(host)
#if new_t != t:
# raise AnsibleError("iterator error, wtf?")
rvals.append((host, t))
else:
rvals.append((host, noop_task))
return rvals
# if any hosts are in ITERATING_SETUP, return the setup task
# while all other hosts get a noop
if num_setups:
return _advance_selected_hosts(hosts, lowest_cur_block, PlayIterator.ITERATING_SETUP)
# if any hosts are in ITERATING_TASKS, return the next normal
# task for these hosts, while all other hosts get a noop
if num_tasks:
return _advance_selected_hosts(hosts, lowest_cur_block, PlayIterator.ITERATING_TASKS)
# if any hosts are in ITERATING_RESCUE, return the next rescue
# task for these hosts, while all other hosts get a noop
if num_rescue:
return _advance_selected_hosts(hosts, lowest_cur_block, PlayIterator.ITERATING_RESCUE)
# if any hosts are in ITERATING_ALWAYS, return the next always
# task for these hosts, while all other hosts get a noop
if num_always:
return _advance_selected_hosts(hosts, lowest_cur_block, PlayIterator.ITERATING_ALWAYS)
# at this point, everything must be ITERATING_COMPLETE, so we
# return None for all hosts in the list
return [(host, None) for host in hosts]
def run(self, iterator, connection_info):
'''
The linear strategy is simple - get the next task and queue
@ -40,6 +125,7 @@ class StrategyModule(StrategyBase):
try:
debug("getting the remaining hosts for this loop")
self._tqm._failed_hosts = iterator.get_failed_hosts()
hosts_left = self.get_hosts_remaining(iterator._play)
debug("done getting the remaining hosts for this loop")
if len(hosts_left) == 0:
@ -51,40 +137,39 @@ class StrategyModule(StrategyBase):
# queue up this task for each host in the inventory
callback_sent = False
work_to_do = False
for host in hosts_left:
while True:
task = iterator.get_next_task_for_host(host)
if not task:
break
debug("getting variables")
task_vars = self._variable_manager.get_vars(loader=self._loader, play=iterator._play, host=host, task=task)
debug("done getting variables")
# check to see if this task should be skipped, due to it being a member of a
# role which has already run (and whether that role allows duplicate execution)
if task._role and task._role.has_run():
# If there is no metadata, the default behavior is to not allow duplicates,
# if there is metadata, check to see if the allow_duplicates flag was set to true
if task._role._metadata is None or task._role._metadata and not task._role._metadata.allow_duplicates:
debug("'%s' skipped because role has already run" % task)
continue
if not task.evaluate_tags(connection_info.only_tags, connection_info.skip_tags, task_vars) and task.action != 'setup':
debug("'%s' failed tag evaluation" % task)
continue
break
host_tasks = self._get_next_task_lockstep(hosts_left, iterator)
for (host, task) in host_tasks:
if not task:
continue
work_to_do = True
debug("getting variables")
task_vars = self._variable_manager.get_vars(loader=self._loader, play=iterator._play, host=host, task=task)
debug("done getting variables")
# check to see if this task should be skipped, due to it being a member of a
# role which has already run (and whether that role allows duplicate execution)
if task._role and task._role.has_run():
# If there is no metadata, the default behavior is to not allow duplicates,
# if there is metadata, check to see if the allow_duplicates flag was set to true
if task._role._metadata is None or task._role._metadata and not task._role._metadata.allow_duplicates:
debug("'%s' skipped because role has already run" % task)
continue
if not task.evaluate_tags(connection_info.only_tags, connection_info.skip_tags, task_vars) and task.action != 'setup':
debug("'%s' failed tag evaluation" % task)
continue
if task.action == 'meta':
# meta tasks store their args in the _raw_params field of args,
# since they do not use k=v pairs, so get that
meta_action = task.args.get('_raw_params')
if meta_action == 'flush_handlers':
if meta_action == 'noop':
# FIXME: issue a callback for the noop here?
continue
elif meta_action == 'flush_handlers':
self.run_handlers(iterator, connection_info)
else:
raise AnsibleError("invalid meta action requested: %s" % meta_action, obj=task._ds)
@ -100,6 +185,11 @@ class StrategyModule(StrategyBase):
debug("done queuing things up, now waiting for results queue to drain")
self._wait_on_pending_results(iterator)
# FIXME: MAKE PENDING RESULTS RETURN RESULTS PROCESSED AND USE THEM
# TO TAKE ACTION, ie. FOR INCLUDE STATEMENTS TO PRESERVE THE
# LOCK STEP OPERATION
debug("results queue empty")
except (IOError, EOFError), e:
debug("got IOError/EOFError in task loop: %s" % e)

4
v2/samples/include.yml
Unescape Escape View File

@ -0,0 +1,4 @@
- debug: msg="this is the include, a=={{a}}"
- debug: msg="this is the second debug in the include"
- debug: msg="this is the third debug in the include, and a is still {{a}}"

3
v2/samples/localhosts
Unescape Escape View File

@ -0,0 +1,3 @@
l1 ansible_ssh_host=127.0.0.1
l2 ansible_ssh_host=127.0.0.2
l3 ansible_ssh_host=127.0.0.3

0
v2/samples/roles/common/meta/main.yml
Unescape Escape View File

1
v2/samples/roles/common/tasks/main.yml
Unescape Escape View File

@ -0,0 +1 @@
- debug: msg="this is a task from the common role"

2
v2/samples/roles/role_a/meta/main.yml
Unescape Escape View File

@ -0,0 +1,2 @@
dependencies:
- common

1
v2/samples/roles/role_a/tasks/main.yml
Unescape Escape View File

@ -0,0 +1 @@
- debug: msg="this is a task from role A"

2
v2/samples/roles/role_b/meta/main.yml
Unescape Escape View File

@ -0,0 +1,2 @@
dependencies:
- common

1
v2/samples/roles/role_b/tasks/main.yml
Unescape Escape View File

@ -0,0 +1 @@
- debug: msg="this is a task from role B"

2
v2/samples/roles/test_role/meta/main.yml
Unescape Escape View File

@ -0,0 +1,2 @@
dependencies:
- test_role_dep

2
v2/samples/roles/test_role/tasks/main.yml
Unescape Escape View File

@ -1 +1,3 @@
- debug: msg="here we are in the role, foo={{foo}}"
- fail:
when: foo != "bar"

1
v2/samples/roles/test_role_dep/tasks/main.yml
Unescape Escape View File

@ -0,0 +1 @@
- debug: msg="here we are in the role dependency"

13
v2/samples/test_block.yml
Unescape Escape View File

@ -1,17 +1,20 @@
- hosts: localhost
- hosts: all
connection: local
gather_facts: no
gather_facts: yes
tasks:
- block:
- command: /bin/false
- debug: msg="you shouldn't see me"
- debug: msg="this is the first task"
- fail:
when: inventory_hostname == "l2"
- debug: msg="only l1 and l3 should see me"
rescue:
- debug: msg="this is the rescue"
- command: /bin/false
- debug: msg="you shouldn't see this either"
- debug: msg="no host should see this run"
always:
- debug: msg="this is the always block, it will always be seen"
when: foo|default('') != "some value"
tags:
- foo
- bar
- debug: msg="you should only see l1 and l3 run this"

8
v2/samples/test_blocks_of_blocks.yml
Unescape Escape View File

@ -0,0 +1,8 @@
- hosts: localhost
gather_facts: no
tasks:
- block:
- block:
- block:
- block:
- debug: msg="are we there yet?"

26
v2/samples/test_include.yml
Unescape Escape View File

@ -0,0 +1,26 @@
- hosts: localhost
gather_facts: no
tasks:
- block:
- include: include.yml
when: 1 == 2
- include: include.yml a=1
when: 1 == 1
notify: foo
- include: include.yml a={{item}}
with_items:
- foo
- bar
- bam
- fail:
#rescue:
#- include: include.yml a=rescue
always:
- include: include.yml a=always
handlers:
- name: foo
include: include.yml a="this is a handler"

3
v2/samples/test_role.yml
Unescape Escape View File

@ -1,4 +1,5 @@
- hosts: ubuntu1404
- hosts: localhost
connection: local
gather_facts: no
vars:
foo: "BAD!!"

6
v2/samples/test_roles_complex.yml
Unescape Escape View File

@ -0,0 +1,6 @@
- hosts: localhost
gather_facts: no
roles:
- { role: role_a, tags: A, when: skip != "A" }
- { role: role_b, tags: B, when: skip != "B" }
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