Ansible - Ad-hoc command

About

Adhoc command ¹⁾ are command executed as in the shell via ansible.

You can therefore execute command on a whole cluster of server.

This is because the default module of the ansible command line is command

Example

We define the servers in a ini inventory file. Two servers in a group called dev with a ssh connection via private key

[dev]
ansibleHostName1  ansible_host=hostname1  ansible_ssh_private_key_file=./privateKey.pem ansible_user=user
ansibleHostName2  ansible_host=hostname2  ansible_ssh_private_key_file=./privateKey.pem ansible_user=user

Example:

ansible -i ansible/hosts-remote.ini --playbook-dir=ansible -a "echo nico" dev

ansibleHostName1 | CHANGED | rc=0 >>
nico

ansibleHostName2 | CHANGED | rc=0 >>
nico

¹⁾

Ad Hoc