Misc Ansible Snippets

Ad Hoc Commands

ansible -m ping all
ansible -m command -a whoami all
ansible -m command -a "uname -r" all

Serial

Serial can be used to trigger numbers of hosts as part of a playbook:

Doing 3 at a time:

- hosts: all
serial: 3

Staggered across 10 nodes:

- hosts: all
serial:
  - 1
  - 3
  - 6

Related: https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_strategies.html

Forks

In ansible.cfg:

[defaults]
forks=40

Max number of connections when running Related: https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_strategies.html