Ansible

Passing variables from the command line

---

- hosts: '{{ hosts }}'
  remote_user: '{{ user }}'

  tasks:
     - ...

ansible-playbook release.yml --extra-vars "hosts=vipers user=starbuck"

Ref: source

Execute command on remote host

$ ansible -i hosts all -u centos -s -m shell -a "rm -rf /"

Executable playbooks

#!/usr/bin/env ansible-playbook -i ../hosts -K
---
- hosts: ...

Debug modules

print will not work, so instead use the following at the top of the module:

import logging
logging.basicConfig(filename="/tmp/ansible-debug.log', level=logging.DEBUG)

Somewhere else in the code do:

logging.debug('your message')

And then tail the log file:

$ tail -f /tmp/ansible-debug.log

Alternatively you can use 'q'

Debug messages

- debug: msg="System {{ inventory_hostname }}"

Source

keep remote files

$ ANSIBLE_KEEP_REMOTE_FILES=1 ansible-playbook ...

$ ls .ansible/tmp/ansible-tmp*