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community.general/plugins/modules/system/pids.py

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2020-03-09 10:11:07 +01:00
#!/usr/bin/python
# Copyright: (c) 2019, Saranya Sridharan
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
DOCUMENTATION = '''
module: pids
description: "Retrieves a list of PIDs of given process name in Ansible controller/controlled machines.Returns an empty list if no process in that name exists."
short_description: "Retrieves process IDs list if the process is running otherwise return empty list"
author:
- Saranya Sridharan (@saranyasridharan)
requirements:
- psutil(python module)
options:
name:
description: the name of the process you want to get PID for.
required: true
type: str
'''
EXAMPLES = '''
# Pass the process name
- name: Getting process IDs of the process
pids:
name: python
register: pids_of_python
- name: Printing the process IDs obtained
debug:
msg: "PIDS of python:{{pids_of_python.pids|join(',')}}"
'''
RETURN = '''
pids:
description: Process IDs of the given process
returned: list of none, one, or more process IDs
type: list
sample: [100,200]
'''
from ansible.module_utils.basic import AnsibleModule
try:
import psutil
HAS_PSUTIL = True
except ImportError:
HAS_PSUTIL = False
def compare_lower(a, b):
if a is None or b is None:
# this could just be "return False" but would lead to surprising behavior if both a and b are None
return a == b
return a.lower() == b.lower()
def get_pid(name):
pids = []
for proc in psutil.process_iter(attrs=['name', 'cmdline']):
if compare_lower(proc.info['name'], name) or \
proc.info['cmdline'] and compare_lower(proc.info['cmdline'][0], name):
pids.append(proc.pid)
return pids
def main():
module = AnsibleModule(
argument_spec=dict(
name=dict(required=True, type="str"),
),
supports_check_mode=True,
)
if not HAS_PSUTIL:
module.fail_json(msg="Missing required 'psutil' python module. Try installing it with: pip install psutil")
name = module.params["name"]
response = dict(pids=get_pid(name))
module.exit_json(**response)
if __name__ == '__main__':
main()