How to debug/test ansible module. Python interactive mode (pdb)

[russell choudhury]

Hi, I want to be able to go into interactive mode while creating a module. To do this I am adding the following line to my python code:

import pdb; pdb.set_trace()

when I run my ansible playbook with the following line:

ansible-playbook -i hosts helloworld.yml -vvv

I get this error:

The full traceback is:

Traceback (most recent call last):

  File "/tmp/ansible_fDi5pe/ansible_module_helloworld.py", line

 5, in <module>

    def main():

  File "/tmp/ansible_fDi5pe/ansible_module_helloworld.py", line

 5, in <module>

    def main():

  File "/usr/lib/python2.7/bdb.py", line 49, in trace_dispatch

    return self.dispatch_line(frame)

  File "/usr/lib/python2.7/bdb.py", line 68, in dispatch_line

    if self.quitting: raise BdbQuit

bdb.BdbQuit

fatal: [localhost]: FAILED! => {

    "changed": false,

    "failed": true,

    "module_stderr": "Traceback (most recent call last):\n  Fil

e \"/tmp/ansible_fDi5pe/ansible_module_helloworld.py\", line 5,

 in <module>\n    def main():\n  File \"/tmp/ansible_fDi5pe/ans

ible_module_helloworld.py\", line 5, in <module>\n    def main(

):\n  File \"/usr/lib/python2.7/bdb.py\", line 49, in trace_dis

patch\n    return self.dispatch_line(frame)\n  File \"/usr/lib/

python2.7/bdb.py\", line 68, in dispatch_line\n    if self.quit

ting: raise BdbQuit\nbdb.BdbQuit\n",

    "module_stdout": "> /tmp/ansible_fDi5pe/ansible_module_hell

oworld.py(5)<module>()\n-> def main():\n(Pdb) *** NameError: na

me 'false' is not defined\n(Pdb) \n",

    "msg": "MODULE FAILURE",

    "rc": 0

}

======================================================

Ansible playbook (helloworld.yml)

---

- hosts: localhost

  tasks:

    - name: Test that my module works

      helloworld: 

      register: result

    - debug: var=result  

=====================================

Ansible module (helloworld.py)

#!/usr/bin/python

from ansible.module_utils.basic import *

def main():

    import pdb; pdb.set_trace()  

    module = AnsibleModule(argument_spec={})

    response = {"hello": "world"}

    module.exit_json(changed=False, meta=response)

if __name__ == '__main__':  

    main()

=====================================

I would like to go into interactive mode so I can debug a module I am creating

Please note that this module works completely fine when I remove the pdb line

pdb is also working find when I don't user ansible

thanks for the help

[Martin Krizek]

Hi,

Using epdb instead of pdb should do the trick, so "import epdb;
epdb.serve()" and then you connect via "epdb.connect()" from a python
shell. See https://pypi.python.org/pypi/epdb/.

Martin

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[russell choudhury]

thanks soo much for the fast reply... it worked :D

'import epdb; epdb.set_trace()' seems to work aswell