cheat:ansible
---
tags: [ orchestration ]
---
# To run a command on multiple instances at once - using `servers` group from `inventory.yml`:
ansible -u ansible -i inventory.yml servers -m shell -a "ls /var"
tldr:ansible
# ansible
# Manage groups of computers remotely over SSH. (use the `/etc/ansible/hosts` file to add new groups/hosts).
# Some subcommands such as `ansible galaxy` have their own usage documentation.
# More information: <https://www.ansible.com/>.
# List hosts belonging to a group:
ansible group --list-hosts
# Ping a group of hosts by invoking the ping module:
ansible group -m ping
# Display facts about a group of hosts by invoking the setup module:
ansible group -m setup
# Execute a command on a group of hosts by invoking command module with arguments:
ansible group -m command -a 'my_command'
# Execute a command with administrative privileges:
ansible group --become --ask-become-pass -m command -a 'my_command'
# Execute a command using a custom inventory file:
ansible group -i inventory_file -m command -a 'my_command'
# List the groups in an inventory:
ansible localhost -m debug -a 'var=groups.keys()'
$
cheat.sh