├── .gitignore ├── CHANGELOG.md ├── COPYING ├── README.md └── strategy_plugins └── debug.py /.gitignore: -------------------------------------------------------------------------------- 1 | *.pyc 2 | /inventory* 3 | /*yml 4 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Changes 2 | 3 | ## 0.3.0 - Mar 19, 2016 4 | 5 | * Support ansible v2, but ansible v1 is not supported anymore 6 | * Simplify commands. see README for more detail 7 | 8 | ## 0.2.4 - Mar 19, 2016 9 | 10 | * Show error message when ansible v2 is used 11 | 12 | ## 0.2.3 - Apr 25, 2015 13 | 14 | * Support assign command. It replaces module_args/complex_args 15 | * Support update command. It partially updates module_args/complex_args 16 | * `assign/update module_args` accepts key=value pairs format as new module_args 17 | * `assign/update complex_args` accepts YAML format as new complex_args 18 | * That is, you can update a module's args using same formats as playbook 19 | * Fix docs so that the difference between module_args and complex_args is clear 20 | 21 | ## 0.2.2 - Jan 31, 2015 22 | 23 | * Support --breakpoint option 24 | * Fix can-not-redo bug on template module 25 | * Fix quit-command-not-actually-quit bug 26 | * Simplify docs and add more examples 27 | * Integrate two hooks to invoke the debugger to one hook so that debugger's behavior is unified. 28 | 29 | ## 0.2.1 - Jan 17, 2015 30 | 31 | * Enable to use [] to access list/dict in print command 32 | * Add --version option 33 | * Connect to travis CI 34 | * Add some documents for developer 35 | * Add more examples 36 | 37 | ## 0.2.0 - Jan 2, 2015 38 | 39 | * Enable to use template in set command (if a playbook has a template error) 40 | * Enable to update the entire module_args in set command 41 | * Improve an error message so that points are clearer 42 | * Add conditions for invoking debugger so that it catches various types of error 43 | * Add more tests 44 | * Various bugfixes 45 | 46 | ## 0.1.0 - Dec 24, 2014 47 | 48 | * Initial release 49 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | 676 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ansible-playbook-debugger 2 | 3 | **This tool is merged into Ansible v2.1! If you are using v2.1 or later, see [official usage documents](https://docs.ansible.com/ansible/latest/user_guide/playbooks_debugger.html).** 4 | 5 | *ansible-playbook-debugger* is the tool to debug a playbook. This debugger is invoked when the task in the playbook fails, and enables you to check useful debug info such as module's args, and variables. Also, you can change module's args in the debugger, and run the failed task again to make sure a bug is fixed. 6 | 7 | NOTE: the debugger in v0.3.0 or later does not support ansible v1. If you use ansible v1, the debugger's version should be [v0.2.4 or earlier](https://github.com/ks888/ansible-playbook-debugger/tree/v0.2.4). 8 | 9 | For example, let's run the playbook below: 10 | 11 | ```bash 12 | - hosts: test 13 | strategy: debug 14 | gather_facts: no 15 | vars: 16 | var1: value1 17 | tasks: 18 | - name: wrong variable 19 | ping: data={{ wrong_var }} 20 | ``` 21 | 22 | The debugger is invoked since *wrong_var* variable is undefined. Let's change the module's args, and run the task again. 23 | 24 | ```bash 25 | $ ansible-playbook example1.yml -i inventory 26 | 27 | PLAY *************************************************************************** 28 | 29 | TASK [wrong variable] ********************************************************** 30 | fatal: [54.249.1.1]: FAILED! => {"failed": true, "msg": "ERROR! 'wrong_var' is undefined"} 31 | Debugger invoked 32 | (debug) p result 33 | {'msg': u"ERROR! 'wrong_var' is undefined", 'failed': True} 34 | (debug) p task.args 35 | {u'data': u'{{ wrong_var }}'} 36 | (debug) task.args['data'] = '{{ var1 }}' 37 | (debug) p task.args 38 | {u'data': '{{ var1 }}'} 39 | (debug) redo 40 | ok: [54.249.1.1] 41 | 42 | PLAY RECAP ********************************************************************* 43 | 54.249.1.1 : ok=1 changed=0 unreachable=0 failed=0 44 | ``` 45 | 46 | This time, the task runs successfully! 47 | 48 | ## Installation 49 | 50 | Make a `strategy_plugins` directory in your playbook directory, and put `debug.py` inside of it. 51 | 52 | ``` 53 | mkdir strategy_plugins 54 | cd strategy_plugins 55 | wget https://raw.githubusercontent.com/ks888/ansible-playbook-debugger/master/strategy_plugins/debug.py 56 | ``` 57 | 58 | ### Setup 59 | 60 | Open your playbook, and add `strategy: debug` line like this: 61 | 62 | ``` 63 | - hosts: all 64 | strategy: debug 65 | ... 66 | ``` 67 | 68 | ## Usage 69 | 70 | ### Run 71 | 72 | Run `ansible-playbook` command as usual. This debugger is invoked when the task in a playbook fails, and show `(debug)` prompt. See [Available Commands](#available-commands) to check the debugger's commands. 73 | 74 | ## Available Commands 75 | 76 | ### p *task/vars/host/result* 77 | 78 | Print values used to execute a module. 79 | 80 | ``` 81 | (debug) p task 82 | TASK: install package 83 | (debug) p task.args 84 | {u'name': u'{{ pkg_name }}'} 85 | (debug) p vars 86 | {u'ansible_all_ipv4_addresses': [u'172.31.6.88'], 87 | u'ansible_all_ipv6_addresses': [u'fe80::497:a8ff:fe70:d9'], 88 | u'ansible_architecture': u'x86_64', 89 | ... 90 | } 91 | (debug) p vars['pkg_name'] 92 | u'bash' 93 | (debug) p host 94 | 54.249.1.1 95 | (debug) p result 96 | {'_ansible_no_log': False, 97 | 'changed': False, 98 | u'failed': True, 99 | ... 100 | u'msg': u"No package matching 'not_exist' is available"} 101 | ``` 102 | 103 | ### task.args[*key*] = *value* 104 | 105 | Update module's argument. 106 | 107 | If you run a playbook like this: 108 | 109 | ``` 110 | - hosts: test 111 | strategy: debug 112 | gather_facts: yes 113 | vars: 114 | pkg_name: not_exist 115 | tasks: 116 | - name: install package 117 | apt: name={{ pkg_name }} 118 | ``` 119 | 120 | Debugger is invoked due to wrong package name, so let's fix the module's args: 121 | 122 | ``` 123 | (debug) p task.args 124 | {u'name': u'{{ pkg_name }}'} 125 | (debug) task.args['name'] = 'bash' 126 | (debug) p task.args 127 | {u'name': 'bash'} 128 | (debug) redo 129 | ``` 130 | 131 | Then the task runs again with new args. 132 | 133 | ### vars[*key*] = *value* 134 | 135 | Update vars. 136 | 137 | Let's use the same playbook above, but fix vars instead of args: 138 | 139 | ``` 140 | (debug) p vars['pkg_name'] 141 | u'not_exist' 142 | (debug) vars['pkg_name'] = 'bash' 143 | (debug) p vars['pkg_name'] 144 | 'bash' 145 | (debug) redo 146 | ``` 147 | 148 | Then the task runs again with new vars. 149 | 150 | ### r(edo) 151 | 152 | Run the task again. 153 | 154 | ### c(ontinue) 155 | 156 | Just continue. 157 | 158 | ### q(uit) 159 | 160 | Quit from the debugger. The playbook execution is aborted. 161 | 162 | ## Contributing 163 | 164 | Contributions are very welcome. Feel free to open an issue or create a pull request. 165 | -------------------------------------------------------------------------------- /strategy_plugins/debug.py: -------------------------------------------------------------------------------- 1 | 2 | import cmd 3 | import pprint 4 | import sys 5 | 6 | from ansible.plugins.strategy import linear 7 | from ansible.plugins.strategy import StrategyBase 8 | 9 | try: 10 | from __main__ import display 11 | except ImportError: 12 | from ansible.utils.display import Display 13 | display = Display() 14 | 15 | __version__ = '0.3.0' 16 | 17 | 18 | class NextAction(object): 19 | """ The next action after an interpreter's exit. """ 20 | REDO = 1 21 | CONTINUE = 2 22 | EXIT = 3 23 | 24 | def __init__(self, result=EXIT): 25 | self.result = result 26 | 27 | 28 | class StrategyModule(linear.StrategyModule, StrategyBase): 29 | # Usually inheriting linear.StrategyModule is enough. However, StrategyBase class must be 30 | # direct ancestor to be considered as strategy plugin, and so we inherit the class here. 31 | 32 | def __init__(self, tqm): 33 | self.curr_tqm = tqm 34 | StrategyBase.__init__(self, tqm) 35 | 36 | def _queue_task(self, host, task, task_vars, play_context): 37 | self.curr_host = host 38 | self.curr_task = task 39 | self.curr_task_vars = task_vars 40 | self.curr_play_context = play_context 41 | 42 | StrategyBase._queue_task(self, host, task, task_vars, play_context) 43 | 44 | def _process_pending_results(self, iterator, one_pass=False): 45 | if not hasattr(self, "curr_host"): 46 | return StrategyBase._process_pending_results(self, iterator, one_pass) 47 | 48 | prev_host_state = iterator.get_host_state(self.curr_host) 49 | results = StrategyBase._process_pending_results(self, iterator, one_pass) 50 | 51 | while self._need_debug(results): 52 | next_action = NextAction() 53 | dbg = Debugger(self, results, next_action) 54 | dbg.cmdloop() 55 | 56 | if next_action.result == NextAction.REDO: 57 | # rollback host state 58 | self.curr_tqm.clear_failed_hosts() 59 | iterator._host_states[self.curr_host.name] = prev_host_state 60 | if reduce(lambda total, res : res.is_failed() or total, results, False): 61 | self._tqm._stats.failures[self.curr_host.name] -= 1 62 | elif reduce(lambda total, res : res.is_unreachable() or total, results, False): 63 | self._tqm._stats.dark[self.curr_host.name] -= 1 64 | 65 | # redo 66 | StrategyBase._queue_task(self, self.curr_host, self.curr_task, self.curr_task_vars, self.curr_play_context) 67 | results = StrategyBase._process_pending_results(self, iterator, one_pass) 68 | elif next_action.result == NextAction.CONTINUE: 69 | break 70 | elif next_action.result == NextAction.EXIT: 71 | exit(1) 72 | 73 | return results 74 | 75 | def _need_debug(self, results): 76 | return reduce(lambda total, res : res.is_failed() or res.is_unreachable() or total, results, False) 77 | 78 | 79 | class Debugger(cmd.Cmd): 80 | prompt = '(debug) ' # debugger 81 | prompt_continuous = '> ' # multiple lines 82 | 83 | def __init__(self, strategy_module, results, next_action): 84 | # cmd.Cmd is old-style class 85 | cmd.Cmd.__init__(self) 86 | 87 | self.intro = "Debugger invoked" 88 | self.scope = {} 89 | self.scope['task'] = strategy_module.curr_task 90 | self.scope['vars'] = strategy_module.curr_task_vars 91 | self.scope['host'] = strategy_module.curr_host 92 | self.scope['result'] = results[0]._result 93 | self.scope['results'] = results # for debug of this debugger 94 | self.next_action = next_action 95 | 96 | def cmdloop(self): 97 | try: 98 | cmd.Cmd.cmdloop(self) 99 | except KeyboardInterrupt: 100 | pass 101 | 102 | def do_EOF(self, args): 103 | return self.do_quit(args) 104 | 105 | def do_quit(self, args): 106 | display.display('aborted') 107 | self.next_action.result = NextAction.EXIT 108 | return True 109 | 110 | do_q = do_quit 111 | 112 | def do_continue(self, args): 113 | self.next_action.result = NextAction.CONTINUE 114 | return True 115 | 116 | do_c = do_continue 117 | 118 | def do_redo(self, args): 119 | self.next_action.result = NextAction.REDO 120 | return True 121 | 122 | do_r = do_redo 123 | 124 | def evaluate(self, args): 125 | try: 126 | return eval(args, globals(), self.scope) 127 | except: 128 | t, v = sys.exc_info()[:2] 129 | if isinstance(t, str): 130 | exc_type_name = t 131 | else: 132 | exc_type_name = t.__name__ 133 | display.display('***%s:%s' % (exc_type_name, repr(v))) 134 | raise 135 | 136 | def do_p(self, args): 137 | try: 138 | result = self.evaluate(args) 139 | display.display(pprint.pformat(result)) 140 | except: 141 | pass 142 | 143 | def execute(self, args): 144 | try: 145 | code = compile(args + '\n', '', 'single') 146 | exec code in globals(), self.scope 147 | except: 148 | t, v = sys.exc_info()[:2] 149 | if type(t) == type(''): 150 | exc_type_name = t 151 | else: 152 | exc_type_name = t.__name__ 153 | display.display('***%s:%s' % (exc_type_name, repr(v))) 154 | raise 155 | 156 | def default(self, line): 157 | try: 158 | self.execute(line) 159 | display.display(pprint.pformat(result)) 160 | except: 161 | pass 162 | --------------------------------------------------------------------------------