mirror of https://github.com/ansible/ansible.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
303 lines
12 KiB
Python
303 lines
12 KiB
Python
# (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.errors import *
|
|
from ansible.playbook.block import Block
|
|
from ansible.playbook.task import Task
|
|
|
|
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
|
|
self.child_state = None
|
|
|
|
def __repr__(self):
|
|
return "HOST STATE: block=%d, task=%d, rescue=%d, always=%d, role=%s, run_state=%d, fail_state=%d, pending_setup=%s, child state? %s" % (
|
|
self.cur_block,
|
|
self.cur_regular_task,
|
|
self.cur_rescue_task,
|
|
self.cur_always_task,
|
|
self.cur_role,
|
|
self.run_state,
|
|
self.fail_state,
|
|
self.pending_setup,
|
|
self.child_state,
|
|
)
|
|
|
|
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
|
|
new_state.child_state = self.child_state
|
|
return new_state
|
|
|
|
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
|
|
|
|
def __init__(self, inventory, play, connection_info, all_vars):
|
|
self._play = play
|
|
|
|
self._blocks = []
|
|
for block in self._play.compile():
|
|
new_block = block.filter_tagged_tasks(connection_info, all_vars)
|
|
if new_block.has_tasks():
|
|
self._blocks.append(new_block)
|
|
|
|
self._host_states = {}
|
|
for host in inventory.get_hosts(self._play.hosts):
|
|
self._host_states[host.name] = HostState(blocks=self._blocks)
|
|
|
|
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 get_next_task_for_host(self, host, peek=False):
|
|
|
|
s = self.get_host_state(host)
|
|
|
|
task = None
|
|
if s.run_state == self.ITERATING_COMPLETE:
|
|
return None
|
|
elif s.run_state == self.ITERATING_SETUP:
|
|
s.run_state = self.ITERATING_TASKS
|
|
s.pending_setup = True
|
|
if self._play.gather_facts == 'smart' and not host._gathered_facts or boolean(self._play.gather_facts):
|
|
if not peek:
|
|
# mark the host as having gathered facts
|
|
host.set_gathered_facts(True)
|
|
|
|
task = Task()
|
|
task.action = 'setup'
|
|
task.args = {}
|
|
task.set_loader(self._play._loader)
|
|
else:
|
|
s.pending_setup = False
|
|
|
|
if not task:
|
|
(s, task) = self._get_next_task_from_state(s, peek=peek)
|
|
|
|
if task and task._role:
|
|
# if we had a current role, mark that role as completed
|
|
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
|
|
s.cur_role = task._role
|
|
|
|
if not peek:
|
|
self._host_states[host.name] = s
|
|
|
|
return (s, task)
|
|
|
|
|
|
def _get_next_task_from_state(self, state, peek):
|
|
|
|
task = None
|
|
|
|
# if we previously encountered a child block and we have a
|
|
# saved child state, try and get the next task from there
|
|
if state.child_state:
|
|
(state.child_state, task) = self._get_next_task_from_state(state.child_state, peek=peek)
|
|
if task:
|
|
return (state.child_state, task)
|
|
else:
|
|
state.child_state = None
|
|
|
|
# try and find the next task, given the current state.
|
|
while True:
|
|
# try to get the current block from the list of blocks, and
|
|
# if we run past the end of the list we know we're done with
|
|
# this block
|
|
try:
|
|
block = state._blocks[state.cur_block]
|
|
except IndexError:
|
|
state.run_state = self.ITERATING_COMPLETE
|
|
return (state, None)
|
|
|
|
if state.run_state == self.ITERATING_TASKS:
|
|
# clear the pending setup flag, since we're past that and it didn't fail
|
|
if state.pending_setup:
|
|
state.pending_setup = False
|
|
|
|
if state.fail_state & self.FAILED_TASKS == self.FAILED_TASKS:
|
|
state.run_state = self.ITERATING_RESCUE
|
|
elif state.cur_regular_task >= len(block.block):
|
|
state.run_state = self.ITERATING_ALWAYS
|
|
else:
|
|
task = block.block[state.cur_regular_task]
|
|
state.cur_regular_task += 1
|
|
|
|
elif state.run_state == self.ITERATING_RESCUE:
|
|
if state.fail_state & self.FAILED_RESCUE == self.FAILED_RESCUE:
|
|
state.run_state = self.ITERATING_ALWAYS
|
|
elif state.cur_rescue_task >= len(block.rescue):
|
|
if len(block.rescue) > 0:
|
|
state.fail_state = self.FAILED_NONE
|
|
state.run_state = self.ITERATING_ALWAYS
|
|
else:
|
|
task = block.rescue[state.cur_rescue_task]
|
|
state.cur_rescue_task += 1
|
|
|
|
elif state.run_state == self.ITERATING_ALWAYS:
|
|
if state.cur_always_task >= len(block.always):
|
|
if state.fail_state != self.FAILED_NONE:
|
|
state.run_state = self.ITERATING_COMPLETE
|
|
else:
|
|
state.cur_block += 1
|
|
state.cur_regular_task = 0
|
|
state.cur_rescue_task = 0
|
|
state.cur_always_task = 0
|
|
state.run_state = self.ITERATING_TASKS
|
|
state.child_state = None
|
|
else:
|
|
task = block.always[state.cur_always_task]
|
|
state.cur_always_task += 1
|
|
|
|
elif state.run_state == self.ITERATING_COMPLETE:
|
|
return (state, None)
|
|
|
|
# if the current task is actually a child block, we dive into it
|
|
if isinstance(task, Block):
|
|
state.child_state = HostState(blocks=[task])
|
|
state.child_state.run_state = self.ITERATING_TASKS
|
|
state.child_state.cur_role = state.cur_role
|
|
(state.child_state, task) = self._get_next_task_from_state(state.child_state, peek=peek)
|
|
|
|
# if something above set the task, break out of the loop now
|
|
if task:
|
|
break
|
|
|
|
return (state, task)
|
|
|
|
def mark_host_failed(self, host):
|
|
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.fail_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.
|
|
'''
|
|
def _search_block(block, task):
|
|
for t in block.block:
|
|
if isinstance(t, Block):
|
|
res = _search_block(t, task)
|
|
if res:
|
|
return res
|
|
elif t._uuid == task._uuid:
|
|
return t
|
|
for t in block.rescue:
|
|
if isinstance(t, Block):
|
|
res = _search_block(t, task)
|
|
if res:
|
|
return res
|
|
elif t._uuid == task._uuid:
|
|
return t
|
|
for t in block.always:
|
|
if isinstance(t, Block):
|
|
res = _search_block(t, task)
|
|
if res:
|
|
return res
|
|
elif t._uuid == task._uuid:
|
|
return t
|
|
return None
|
|
|
|
s = self.get_host_state(host)
|
|
for block in s._blocks:
|
|
res = _search_block(block, task)
|
|
if res:
|
|
return res
|
|
|
|
return None
|
|
|
|
def add_tasks(self, host, task_list):
|
|
s = self.get_host_state(host)
|
|
target_block = s._blocks[s.cur_block].copy(exclude_parent=True)
|
|
|
|
if s.run_state == self.ITERATING_TASKS:
|
|
before = target_block.block[:s.cur_regular_task]
|
|
after = target_block.block[s.cur_regular_task:]
|
|
target_block.block = before + task_list + after
|
|
elif s.run_state == self.ITERATING_RESCUE:
|
|
before = target_block.rescue[:s.cur_rescue_task]
|
|
after = target_block.rescue[s.cur_rescue_task:]
|
|
target_block.rescue = before + task_list + after
|
|
elif s.run_state == self.ITERATING_ALWAYS:
|
|
before = target_block.always[:s.cur_always_task]
|
|
after = target_block.always[s.cur_always_task:]
|
|
target_block.always = before + task_list + after
|
|
|
|
s._blocks[s.cur_block] = target_block
|
|
self._host_states[host.name] = s
|
|
|