Provide a way to explicitly invoke the debugger (#34006)
* Provide a way to explicitly invoke the debugger with in the debug strategy * Merge the debugger strategy into StrategyBase * Fix some logic, pin to a single result * Make redo also continue * Make sure that if the debug closure doesn't need to process the result, that we still return it * Fix failing tests for the strategy * Clean up messages from debugger and exit code to match bin/ansible * Move the FieldAttribute higher, to apply at different levels * make debugger a string, expand logic * Better host state rollbacks * More explicit debugger prompt * ENABLE_TASK_DEBUGGER should be boolean, and better docs * No bare except, add pprint, alias h, vars to task_vars * _validate_debugger can ignore non-string, that can be caught later * Address issue if there were no previous tasks/state, and use the correct key * Update docs for changes to the debugger * Guard against a stat going negative through use of decrement * Add a few notes about using the debugger on the free strategy * Add changelog entry for task debugger * Add a few versionadded indicators and a note about vars -> task_vars
This commit is contained in:
parent
e802b769e6
commit
d1846425db
9 changed files with 394 additions and 176 deletions
|
@ -53,6 +53,8 @@ Ansible Changes By Release
|
|||
2.9. use `get_checksum: True` with `checksum_algorithm: md5` to return an md5 hash of the file
|
||||
under the `checksum` return value.
|
||||
* `osx_say` module was renamed into `say`.
|
||||
* Task debugger functionality was moved into `StrategyBase`, and extended to allow explicit invocation from use of the `debugger` keyword.
|
||||
The `debug` strategy is still functional, and is now just a trigger to enable this functionality
|
||||
|
||||
#### Deprecated Modules (to be removed in 2.9):
|
||||
* ec2_ami_find: replaced by ec2_ami_facts
|
||||
|
|
|
@ -3,8 +3,93 @@ Playbook Debugger
|
|||
|
||||
.. contents:: Topics
|
||||
|
||||
Ansible includes a ``debug`` strategy. This strategy enables you to invoke a debugger when a task has
|
||||
failed. You have access to all of the features of the debugger in the context of the failed task. You can then, for example, check or set the value of variables, update module arguments, and re-run the failed task with the new variables and arguments to help resolve the cause of the failure.
|
||||
Ansible includes a debugger as part of the strategy plugins. This debugger enables you to debug as task.
|
||||
You have access to all of the features of the debugger in the context of the task. You can then, for example, check or set the value of variables, update module arguments, and re-run the task with the new variables and arguments to help resolve the cause of the failure.
|
||||
|
||||
There are multiple ways to invoke the debugger.
|
||||
|
||||
Using the debugger keyword
|
||||
++++++++++++++++++++++++++
|
||||
|
||||
.. versionadded:: 2.5
|
||||
|
||||
The ``debugger`` keyword can be used on any block where you provide a ``name`` attribute, such as a play, role, block or task.
|
||||
|
||||
The ``debugger`` keyword accepts several values:
|
||||
|
||||
always
|
||||
Always invoke the debugger, regardless of the outcome
|
||||
|
||||
never
|
||||
Never invoke the debugger, regardless of the outcome
|
||||
|
||||
on_failed
|
||||
Only invoke the debugger if a task fails
|
||||
|
||||
on_unreachable
|
||||
Only invoke the debugger if the a host was unreachable
|
||||
|
||||
on_skipped
|
||||
Only invoke the debugger if the task is skipped
|
||||
|
||||
These options override any global configuration to enable or disable the debugger.
|
||||
|
||||
On a task
|
||||
`````````
|
||||
|
||||
::
|
||||
|
||||
- name: Execute a command
|
||||
command: false
|
||||
debugger: on_failed
|
||||
|
||||
On a play
|
||||
`````````
|
||||
|
||||
::
|
||||
|
||||
- name: Play
|
||||
hosts: all
|
||||
debugger: on_skipped
|
||||
tasks:
|
||||
- name: Execute a command
|
||||
command: true
|
||||
when: False
|
||||
|
||||
When provided at a generic level and a more specific level, the more specific wins::
|
||||
|
||||
- name: Play
|
||||
hosts: all
|
||||
debugger: never
|
||||
tasks:
|
||||
- name: Execute a command
|
||||
command: false
|
||||
debugger: on_failed
|
||||
|
||||
|
||||
Configuration or environment variable
|
||||
+++++++++++++++++++++++++++++++++++++
|
||||
|
||||
.. versionadded:: 2.5
|
||||
|
||||
In ansible.cfg::
|
||||
|
||||
[defaults]
|
||||
enable_task_debugger = True
|
||||
|
||||
As an environment variable::
|
||||
|
||||
ANSIBLE_ENABLE_TASK_DEBUGGER=True ansible-playbook -i hosts site.yml
|
||||
|
||||
When using this method, any failed or unreachable task will invoke the debugger,
|
||||
unless otherwise explicitly disabled.
|
||||
|
||||
As a Strategy
|
||||
+++++++++++++
|
||||
|
||||
.. note::
|
||||
This is a backwards compatible method, to match Ansible versions before 2.5,
|
||||
and may be remoevd in a future release
|
||||
|
||||
To use the ``debug`` strategy, change the ``strategy`` attribute like this::
|
||||
|
||||
|
@ -14,12 +99,19 @@ To use the ``debug`` strategy, change the ``strategy`` attribute like this::
|
|||
...
|
||||
|
||||
If you don't want change the code, you can define ``ANSIBLE_STRATEGY=debug``
|
||||
environment variable in order to enable the debugger.
|
||||
environment variable in order to enable the debugger, or modify ``ansible.cfg`` such as::
|
||||
|
||||
[defaults]
|
||||
strategy = debug
|
||||
|
||||
|
||||
Examples
|
||||
++++++++
|
||||
|
||||
For example, run the playbook below::
|
||||
|
||||
- hosts: test
|
||||
strategy: debug
|
||||
debugger: on_failed
|
||||
gather_facts: no
|
||||
vars:
|
||||
var1: value1
|
||||
|
@ -38,14 +130,27 @@ Let's change the module's arguments and run the task again
|
|||
TASK [wrong variable] **********************************************************
|
||||
fatal: [192.0.2.10]: FAILED! => {"failed": true, "msg": "ERROR! 'wrong_var' is undefined"}
|
||||
Debugger invoked
|
||||
(debug) p result
|
||||
{'msg': u"ERROR! 'wrong_var' is undefined", 'failed': True}
|
||||
(debug) p task.args
|
||||
[192.0.2.10] TASK: wrong variable (debug)> p result._result
|
||||
{'failed': True,
|
||||
'msg': 'The task includes an option with an undefined variable. The error '
|
||||
"was: 'wrong_var' is undefined\n"
|
||||
'\n'
|
||||
'The error appears to have been in '
|
||||
"'playbooks/debugger.yml': line 7, "
|
||||
'column 7, but may\n'
|
||||
'be elsewhere in the file depending on the exact syntax problem.\n'
|
||||
'\n'
|
||||
'The offending line appears to be:\n'
|
||||
'\n'
|
||||
' tasks:\n'
|
||||
' - name: wrong variable\n'
|
||||
' ^ here\n'}
|
||||
[192.0.2.10] TASK: wrong variable (debug)> p task.args
|
||||
{u'data': u'{{ wrong_var }}'}
|
||||
(debug) task.args['data'] = '{{ var1 }}'
|
||||
(debug) p task.args
|
||||
[192.0.2.10] TASK: wrong variable (debug)> task.args['data'] = '{{ var1 }}'
|
||||
[192.0.2.10] TASK: wrong variable (debug)> p task.args
|
||||
{u'data': '{{ var1 }}'}
|
||||
(debug) redo
|
||||
[192.0.2.10] TASK: wrong variable (debug)> redo
|
||||
ok: [192.0.2.10]
|
||||
|
||||
PLAY RECAP *********************************************************************
|
||||
|
@ -58,27 +163,27 @@ This time, the task runs successfully!
|
|||
Available Commands
|
||||
++++++++++++++++++
|
||||
|
||||
.. _p_command:
|
||||
.. _pprint_command:
|
||||
|
||||
p *task/vars/host/result*
|
||||
`````````````````````````
|
||||
p(print) *task/task_vars/host/result*
|
||||
`````````````````````````````````````
|
||||
|
||||
Print values used to execute a module::
|
||||
|
||||
(debug) p task
|
||||
[192.0.2.10] TASK: install package (debug)> p task
|
||||
TASK: install package
|
||||
(debug) p task.args
|
||||
[192.0.2.10] TASK: install package (debug)> p task.args
|
||||
{u'name': u'{{ pkg_name }}'}
|
||||
(debug) p vars
|
||||
[192.0.2.10] TASK: install package (debug)> p task_vars
|
||||
{u'ansible_all_ipv4_addresses': [u'192.0.2.10'],
|
||||
u'ansible_architecture': u'x86_64',
|
||||
...
|
||||
}
|
||||
(debug) p vars['pkg_name']
|
||||
[192.0.2.10] TASK: install package (debug)> p task_vars['pkg_name']
|
||||
u'bash'
|
||||
(debug) p host
|
||||
[192.0.2.10] TASK: install package (debug)> p host
|
||||
192.0.2.10
|
||||
(debug) p result
|
||||
[192.0.2.10] TASK: install package (debug)> p result._result
|
||||
{'_ansible_no_log': False,
|
||||
'changed': False,
|
||||
u'failed': True,
|
||||
|
@ -105,32 +210,35 @@ If you run a playbook like this::
|
|||
|
||||
Debugger is invoked due to wrong package name, so let's fix the module's args::
|
||||
|
||||
(debug) p task.args
|
||||
[192.0.2.10] TASK: install package (debug)> p task.args
|
||||
{u'name': u'{{ pkg_name }}'}
|
||||
(debug) task.args['name'] = 'bash'
|
||||
(debug) p task.args
|
||||
[192.0.2.10] TASK: install package (debug)> task.args['name'] = 'bash'
|
||||
[192.0.2.10] TASK: install package (debug)> p task.args
|
||||
{u'name': 'bash'}
|
||||
(debug) redo
|
||||
[192.0.2.10] TASK: install package (debug)> redo
|
||||
|
||||
Then the task runs again with new args.
|
||||
|
||||
.. _update_vars_command:
|
||||
|
||||
vars[*key*] = *value*
|
||||
`````````````````````
|
||||
task_vars[*key*] = *value*
|
||||
``````````````````````````
|
||||
|
||||
Update vars.
|
||||
Update ``task_vars``.
|
||||
|
||||
Let's use the same playbook above, but fix vars instead of args::
|
||||
Let's use the same playbook above, but fix ``task_vars`` instead of args::
|
||||
|
||||
(debug) p vars['pkg_name']
|
||||
[192.0.2.10] TASK: install package (debug)> p task_vars['pkg_name']
|
||||
u'not_exist'
|
||||
(debug) vars['pkg_name'] = 'bash'
|
||||
(debug) p vars['pkg_name']
|
||||
[192.0.2.10] TASK: install package (debug)> task_vars['pkg_name'] = 'bash'
|
||||
[192.0.2.10] TASK: install package (debug)> p task_vars['pkg_name']
|
||||
'bash'
|
||||
(debug) redo
|
||||
[192.0.2.10] TASK: install package (debug)> redo
|
||||
|
||||
Then the task runs again with new vars.
|
||||
Then the task runs again with new ``task_vars``.
|
||||
|
||||
.. note::
|
||||
In 2.5 this was updated from ``vars`` to ``task_vars`` to not conflict with the ``vars()`` python function.
|
||||
|
||||
.. _redo_command:
|
||||
|
||||
|
@ -153,6 +261,14 @@ q(uit)
|
|||
|
||||
Quit from the debugger. The playbook execution is aborted.
|
||||
|
||||
Use with the free strategy
|
||||
++++++++++++++++++++++++++
|
||||
|
||||
Using the debugger on the ``free`` strategy will cause no further tasks to be queued or executed
|
||||
while the debugger is active. Additionally, using ``redo`` on a task to schedule it for re-execution
|
||||
may cause the rescheduled task to execute after subsequent tasks listed in your playbook.
|
||||
|
||||
|
||||
.. seealso::
|
||||
|
||||
:doc:`playbooks`
|
||||
|
|
|
@ -932,6 +932,18 @@ DEFAULT_STDOUT_CALLBACK:
|
|||
env: [{name: ANSIBLE_STDOUT_CALLBACK}]
|
||||
ini:
|
||||
- {key: stdout_callback, section: defaults}
|
||||
ENABLE_TASK_DEBUGGER:
|
||||
name: Whether to enable the task debugger
|
||||
default: False
|
||||
description:
|
||||
- Whether or not to enable the task debugger, this previously was done as a strategy plugin.
|
||||
- Now all strategy plugins can inherit this behavior. The debugger defaults to activating when
|
||||
- a task is failed on unreachable. Use the debugger keyword for more flexibility.
|
||||
type: boolean
|
||||
env: [{name: ANSIBLE_ENABLE_TASK_DEBUGGER}]
|
||||
ini:
|
||||
- {key: enable_task_debugger, section: defaults}
|
||||
version_added: "2.5"
|
||||
DEFAULT_STRATEGY:
|
||||
name: Implied strategy
|
||||
default: 'linear'
|
||||
|
|
|
@ -46,6 +46,16 @@ class AggregateStats:
|
|||
prev = (getattr(self, what)).get(host, 0)
|
||||
getattr(self, what)[host] = prev + 1
|
||||
|
||||
def decrement(self, what, host):
|
||||
_what = getattr(self, what)
|
||||
try:
|
||||
if _what[host] - 1 < 0:
|
||||
# This should never happen, but let's be safe
|
||||
raise KeyError("Don't be so negative")
|
||||
_what[host] -= 1
|
||||
except KeyError:
|
||||
_what[host] = 0
|
||||
|
||||
def summarize(self, host):
|
||||
''' return information about a particular host '''
|
||||
|
||||
|
|
|
@ -64,6 +64,26 @@ class TaskResult:
|
|||
def is_unreachable(self):
|
||||
return self._check_key('unreachable')
|
||||
|
||||
def needs_debugger(self, globally_enabled=False):
|
||||
_debugger = self._task_fields.get('debugger')
|
||||
|
||||
ret = False
|
||||
if globally_enabled and (self.is_failed() or self.is_unreachable()):
|
||||
ret = True
|
||||
|
||||
if _debugger in ('always',):
|
||||
ret = True
|
||||
elif _debugger in ('never',):
|
||||
ret = False
|
||||
elif _debugger in ('on_failed',) and self.is_failed():
|
||||
ret = True
|
||||
elif _debugger in ('on_unreachable',) and self.is_unreachable():
|
||||
ret = True
|
||||
elif _debugger in('on_skipped',) and self.is_skipped():
|
||||
ret = True
|
||||
|
||||
return ret
|
||||
|
||||
def _check_key(self, key):
|
||||
'''get a specific key from the result or its items'''
|
||||
|
||||
|
|
|
@ -162,6 +162,9 @@ class Base(with_metaclass(BaseMeta, object)):
|
|||
_diff = FieldAttribute(isa='bool')
|
||||
_any_errors_fatal = FieldAttribute(isa='bool')
|
||||
|
||||
# explicitly invoke a debugger on tasks
|
||||
_debugger = FieldAttribute(isa='string')
|
||||
|
||||
# param names which have been deprecated/removed
|
||||
DEPRECATED_ATTRIBUTES = [
|
||||
'sudo', 'sudo_user', 'sudo_pass', 'sudo_exe', 'sudo_flags',
|
||||
|
@ -274,6 +277,12 @@ class Base(with_metaclass(BaseMeta, object)):
|
|||
def get_variable_manager(self):
|
||||
return self._variable_manager
|
||||
|
||||
def _validate_debugger(self, attr, name, value):
|
||||
valid_values = frozenset(('always', 'on_failed', 'on_unreachable', 'on_skipped', 'never'))
|
||||
if value and isinstance(value, string_types) and value not in valid_values:
|
||||
raise AnsibleParserError("'%s' is not a valid value for debugger. Must be one of %s" % (value, ', '.join(valid_values)), obj=self.get_ds())
|
||||
return value
|
||||
|
||||
def _validate_attributes(self, ds):
|
||||
'''
|
||||
Ensures that there are no keys in the datastructure which do
|
||||
|
|
|
@ -19,7 +19,11 @@
|
|||
from __future__ import (absolute_import, division, print_function)
|
||||
__metaclass__ = type
|
||||
|
||||
import cmd
|
||||
import functools
|
||||
import os
|
||||
import pprint
|
||||
import sys
|
||||
import threading
|
||||
import time
|
||||
|
||||
|
@ -76,6 +80,7 @@ class SharedPluginLoaderObj:
|
|||
self.lookup_loader = lookup_loader
|
||||
self.module_loader = module_loader
|
||||
|
||||
|
||||
_sentinel = StrategySentinel()
|
||||
|
||||
|
||||
|
@ -95,6 +100,67 @@ def results_thread_main(strategy):
|
|||
pass
|
||||
|
||||
|
||||
def debug_closure(func):
|
||||
"""Closure to wrap ``StrategyBase._process_pending_results`` and invoke the task debugger"""
|
||||
@functools.wraps(func)
|
||||
def inner(self, iterator, one_pass=False, max_passes=None):
|
||||
status_to_stats_map = (
|
||||
('is_failed', 'failures'),
|
||||
('is_unreachable', 'dark'),
|
||||
('is_changed', 'changed'),
|
||||
('is_skipped', 'skipped'),
|
||||
)
|
||||
|
||||
# We don't know the host yet, copy the previous states, for lookup after we process new results
|
||||
prev_host_states = iterator._host_states.copy()
|
||||
|
||||
results = func(self, iterator, one_pass=one_pass, max_passes=max_passes)
|
||||
_processed_results = []
|
||||
|
||||
for result in results:
|
||||
task = result._task
|
||||
host = result._host
|
||||
_queue_task_args = self._queue_task_args.pop('%s%s' % (host.name, task._uuid))
|
||||
task_vars = _queue_task_args['task_vars']
|
||||
play_context = _queue_task_args['play_context']
|
||||
# Try to grab the previous host state, if it doesn't exist use get_host_state to generate an empty state
|
||||
try:
|
||||
prev_host_state = prev_host_states[host.name]
|
||||
except KeyError:
|
||||
prev_host_state = iterator.get_host_state(host)
|
||||
|
||||
while result.needs_debugger(globally_enabled=self.debugger_active):
|
||||
next_action = NextAction()
|
||||
dbg = Debugger(task, host, task_vars, play_context, result, next_action)
|
||||
dbg.cmdloop()
|
||||
|
||||
if next_action.result == NextAction.REDO:
|
||||
# rollback host state
|
||||
self._tqm.clear_failed_hosts()
|
||||
iterator._host_states[host.name] = prev_host_state
|
||||
for method, what in status_to_stats_map:
|
||||
if getattr(result, method)():
|
||||
self._tqm._stats.decrement(what, host.name)
|
||||
self._tqm._stats.decrement('ok', host.name)
|
||||
|
||||
# redo
|
||||
self._queue_task(host, task, task_vars, play_context)
|
||||
|
||||
_processed_results.extend(debug_closure(func)(self, iterator, one_pass))
|
||||
break
|
||||
elif next_action.result == NextAction.CONTINUE:
|
||||
_processed_results.append(result)
|
||||
break
|
||||
elif next_action.result == NextAction.EXIT:
|
||||
# Matches KeyboardInterrupt from bin/ansible
|
||||
sys.exit(99)
|
||||
else:
|
||||
_processed_results.append(result)
|
||||
|
||||
return _processed_results
|
||||
return inner
|
||||
|
||||
|
||||
class StrategyBase:
|
||||
|
||||
'''
|
||||
|
@ -113,6 +179,7 @@ class StrategyBase:
|
|||
self._final_q = tqm._final_q
|
||||
self._step = getattr(tqm._options, 'step', False)
|
||||
self._diff = getattr(tqm._options, 'diff', False)
|
||||
self._queue_task_args = {}
|
||||
|
||||
# Backwards compat: self._display isn't really needed, just import the global display and use that.
|
||||
self._display = display
|
||||
|
@ -137,6 +204,8 @@ class StrategyBase:
|
|||
# play completion
|
||||
self._active_connections = dict()
|
||||
|
||||
self.debugger_active = C.ENABLE_TASK_DEBUGGER
|
||||
|
||||
def cleanup(self):
|
||||
# close active persistent connections
|
||||
for sock in itervalues(self._active_connections):
|
||||
|
@ -201,6 +270,13 @@ class StrategyBase:
|
|||
def _queue_task(self, host, task, task_vars, play_context):
|
||||
''' handles queueing the task up to be sent to a worker '''
|
||||
|
||||
self._queue_task_args['%s%s' % (host.name, task._uuid)] = {
|
||||
'host': host,
|
||||
'task': task,
|
||||
'task_vars': task_vars,
|
||||
'play_context': play_context
|
||||
}
|
||||
|
||||
display.debug("entering _queue_task() for %s/%s" % (host.name, task.action))
|
||||
|
||||
# Add a write lock for tasks.
|
||||
|
@ -268,6 +344,7 @@ class StrategyBase:
|
|||
|
||||
return [actual_host]
|
||||
|
||||
@debug_closure
|
||||
def _process_pending_results(self, iterator, one_pass=False, max_passes=None):
|
||||
'''
|
||||
Reads results off the final queue and takes appropriate action
|
||||
|
@ -949,3 +1026,106 @@ class StrategyBase:
|
|||
if socket_path:
|
||||
if r._host not in self._active_connections:
|
||||
self._active_connections[r._host] = socket_path
|
||||
|
||||
|
||||
class NextAction(object):
|
||||
""" The next action after an interpreter's exit. """
|
||||
REDO = 1
|
||||
CONTINUE = 2
|
||||
EXIT = 3
|
||||
|
||||
def __init__(self, result=EXIT):
|
||||
self.result = result
|
||||
|
||||
|
||||
class Debugger(cmd.Cmd):
|
||||
prompt_continuous = '> ' # multiple lines
|
||||
|
||||
def __init__(self, task, host, task_vars, play_context, result, next_action):
|
||||
# cmd.Cmd is old-style class
|
||||
cmd.Cmd.__init__(self)
|
||||
|
||||
self.prompt = '[%s] %s (debug)> ' % (host, task)
|
||||
self.intro = None
|
||||
self.scope = {}
|
||||
self.scope['task'] = task
|
||||
self.scope['task_vars'] = task_vars
|
||||
self.scope['host'] = host
|
||||
self.scope['play_context'] = play_context
|
||||
self.scope['result'] = result
|
||||
self.next_action = next_action
|
||||
|
||||
def cmdloop(self):
|
||||
try:
|
||||
cmd.Cmd.cmdloop(self)
|
||||
except KeyboardInterrupt:
|
||||
pass
|
||||
|
||||
do_h = cmd.Cmd.do_help
|
||||
|
||||
def do_EOF(self, args):
|
||||
"""Quit"""
|
||||
return self.do_quit(args)
|
||||
|
||||
def do_quit(self, args):
|
||||
"""Quit"""
|
||||
display.display('User interrupted execution')
|
||||
self.next_action.result = NextAction.EXIT
|
||||
return True
|
||||
|
||||
do_q = do_quit
|
||||
|
||||
def do_continue(self, args):
|
||||
"""Continue to next result"""
|
||||
self.next_action.result = NextAction.CONTINUE
|
||||
return True
|
||||
|
||||
do_c = do_continue
|
||||
|
||||
def do_redo(self, args):
|
||||
"""Schedule task for re-execution. The re-execution may not be the next result"""
|
||||
self.next_action.result = NextAction.REDO
|
||||
return True
|
||||
|
||||
do_r = do_redo
|
||||
|
||||
def evaluate(self, args):
|
||||
try:
|
||||
return eval(args, globals(), self.scope)
|
||||
except Exception:
|
||||
t, v = sys.exc_info()[:2]
|
||||
if isinstance(t, str):
|
||||
exc_type_name = t
|
||||
else:
|
||||
exc_type_name = t.__name__
|
||||
display.display('***%s:%s' % (exc_type_name, repr(v)))
|
||||
raise
|
||||
|
||||
def do_pprint(self, args):
|
||||
"""Pretty Print"""
|
||||
try:
|
||||
result = self.evaluate(args)
|
||||
display.display(pprint.pformat(result))
|
||||
except Exception:
|
||||
pass
|
||||
|
||||
do_p = do_pprint
|
||||
|
||||
def execute(self, args):
|
||||
try:
|
||||
code = compile(args + '\n', '<stdin>', 'single')
|
||||
exec(code, globals(), self.scope)
|
||||
except Exception:
|
||||
t, v = sys.exc_info()[:2]
|
||||
if isinstance(t, str):
|
||||
exc_type_name = t
|
||||
else:
|
||||
exc_type_name = t.__name__
|
||||
display.display('***%s:%s' % (exc_type_name, repr(v)))
|
||||
raise
|
||||
|
||||
def default(self, line):
|
||||
try:
|
||||
self.execute(line)
|
||||
except Exception:
|
||||
pass
|
||||
|
|
|
@ -28,153 +28,10 @@ import cmd
|
|||
import pprint
|
||||
import sys
|
||||
|
||||
from ansible.module_utils.six.moves import reduce
|
||||
from ansible.plugins.strategy.linear import StrategyModule as LinearStrategyModule
|
||||
|
||||
try:
|
||||
from __main__ import display
|
||||
except ImportError:
|
||||
from ansible.utils.display import Display
|
||||
display = Display()
|
||||
|
||||
|
||||
class NextAction(object):
|
||||
""" The next action after an interpreter's exit. """
|
||||
REDO = 1
|
||||
CONTINUE = 2
|
||||
EXIT = 3
|
||||
|
||||
def __init__(self, result=EXIT):
|
||||
self.result = result
|
||||
|
||||
|
||||
class StrategyModule(LinearStrategyModule):
|
||||
def __init__(self, tqm):
|
||||
self.curr_tqm = tqm
|
||||
super(StrategyModule, self).__init__(tqm)
|
||||
|
||||
def _queue_task(self, host, task, task_vars, play_context):
|
||||
self.curr_host = host
|
||||
self.curr_task = task
|
||||
self.curr_task_vars = task_vars
|
||||
self.curr_play_context = play_context
|
||||
|
||||
super(StrategyModule, self)._queue_task(host, task, task_vars, play_context)
|
||||
|
||||
def _process_pending_results(self, iterator, one_pass=False, max_passes=None):
|
||||
if not hasattr(self, "curr_host"):
|
||||
return super(StrategyModule, self)._process_pending_results(iterator, one_pass, max_passes)
|
||||
|
||||
prev_host_state = iterator.get_host_state(self.curr_host)
|
||||
results = super(StrategyModule, self)._process_pending_results(iterator, one_pass)
|
||||
|
||||
while self._need_debug(results):
|
||||
next_action = NextAction()
|
||||
dbg = Debugger(self, results, next_action)
|
||||
dbg.cmdloop()
|
||||
|
||||
if next_action.result == NextAction.REDO:
|
||||
# rollback host state
|
||||
self.curr_tqm.clear_failed_hosts()
|
||||
iterator._host_states[self.curr_host.name] = prev_host_state
|
||||
if reduce(lambda total, res: res.is_failed() or total, results, False):
|
||||
self._tqm._stats.failures[self.curr_host.name] -= 1
|
||||
elif reduce(lambda total, res: res.is_unreachable() or total, results, False):
|
||||
self._tqm._stats.dark[self.curr_host.name] -= 1
|
||||
|
||||
# redo
|
||||
super(StrategyModule, self)._queue_task(self.curr_host, self.curr_task, self.curr_task_vars, self.curr_play_context)
|
||||
results = super(StrategyModule, self)._process_pending_results(iterator, one_pass)
|
||||
elif next_action.result == NextAction.CONTINUE:
|
||||
break
|
||||
elif next_action.result == NextAction.EXIT:
|
||||
exit(1)
|
||||
|
||||
return results
|
||||
|
||||
def _need_debug(self, results):
|
||||
return reduce(lambda total, res: res.is_failed() or res.is_unreachable() or total, results, False)
|
||||
|
||||
|
||||
class Debugger(cmd.Cmd):
|
||||
prompt = '(debug) ' # debugger
|
||||
prompt_continuous = '> ' # multiple lines
|
||||
|
||||
def __init__(self, strategy_module, results, next_action):
|
||||
# cmd.Cmd is old-style class
|
||||
cmd.Cmd.__init__(self)
|
||||
|
||||
self.intro = "Debugger invoked"
|
||||
self.scope = {}
|
||||
self.scope['task'] = strategy_module.curr_task
|
||||
self.scope['vars'] = strategy_module.curr_task_vars
|
||||
self.scope['host'] = strategy_module.curr_host
|
||||
self.scope['result'] = results[0]._result
|
||||
self.scope['results'] = results # for debug of this debugger
|
||||
self.next_action = next_action
|
||||
|
||||
def cmdloop(self):
|
||||
try:
|
||||
cmd.Cmd.cmdloop(self)
|
||||
except KeyboardInterrupt:
|
||||
pass
|
||||
|
||||
def do_EOF(self, args):
|
||||
return self.do_quit(args)
|
||||
|
||||
def do_quit(self, args):
|
||||
display.display('aborted')
|
||||
self.next_action.result = NextAction.EXIT
|
||||
return True
|
||||
|
||||
do_q = do_quit
|
||||
|
||||
def do_continue(self, args):
|
||||
self.next_action.result = NextAction.CONTINUE
|
||||
return True
|
||||
|
||||
do_c = do_continue
|
||||
|
||||
def do_redo(self, args):
|
||||
self.next_action.result = NextAction.REDO
|
||||
return True
|
||||
|
||||
do_r = do_redo
|
||||
|
||||
def evaluate(self, args):
|
||||
try:
|
||||
return eval(args, globals(), self.scope)
|
||||
except:
|
||||
t, v = sys.exc_info()[:2]
|
||||
if isinstance(t, str):
|
||||
exc_type_name = t
|
||||
else:
|
||||
exc_type_name = t.__name__
|
||||
display.display('***%s:%s' % (exc_type_name, repr(v)))
|
||||
raise
|
||||
|
||||
def do_p(self, args):
|
||||
try:
|
||||
result = self.evaluate(args)
|
||||
display.display(pprint.pformat(result))
|
||||
except:
|
||||
pass
|
||||
|
||||
def execute(self, args):
|
||||
try:
|
||||
code = compile(args + '\n', '<stdin>', 'single')
|
||||
exec(code, globals(), self.scope)
|
||||
except:
|
||||
t, v = sys.exc_info()[:2]
|
||||
if isinstance(t, str):
|
||||
exc_type_name = t
|
||||
else:
|
||||
exc_type_name = t.__name__
|
||||
display.display('***%s:%s' % (exc_type_name, repr(v)))
|
||||
raise
|
||||
|
||||
def default(self, line):
|
||||
try:
|
||||
self.execute(line)
|
||||
except:
|
||||
pass
|
||||
self.debugger_active = True
|
||||
|
|
|
@ -336,6 +336,13 @@ class TestStrategyBase(unittest.TestCase):
|
|||
queue_items.append(task_result)
|
||||
strategy_base._blocked_hosts['test01'] = True
|
||||
strategy_base._pending_results = 1
|
||||
|
||||
strategy_base._queue_task_args = MagicMock()
|
||||
strategy_base._queue_task_args.pop.return_value = {
|
||||
'task_vars': {},
|
||||
'play_context': {},
|
||||
}
|
||||
|
||||
results = strategy_base._wait_on_pending_results(iterator=mock_iterator)
|
||||
self.assertEqual(len(results), 1)
|
||||
self.assertEqual(results[0], task_result)
|
||||
|
@ -539,6 +546,11 @@ class TestStrategyBase(unittest.TestCase):
|
|||
strategy_base._notified_handlers = {mock_handler_task._uuid: [mock_host]}
|
||||
|
||||
task_result = TaskResult(Host('host01'), Handler(), dict(changed=False))
|
||||
strategy_base._queue_task_args = MagicMock()
|
||||
strategy_base._queue_task_args.pop.return_value = {
|
||||
'task_vars': {},
|
||||
'play_context': mock_play_context
|
||||
}
|
||||
tqm._final_q.put(task_result)
|
||||
|
||||
result = strategy_base.run_handlers(iterator=mock_iterator, play_context=mock_play_context)
|
||||
|
|
Loading…
Reference in a new issue