The hostname module

This is another simple module that does the simple job of changing a hostname. To make this module more exciting, we will use some of the playbook features with it. This module takes one input, the new hostname, and changes the hostname of the remote host. We can use the playbook predefined variable, {{ inventory_hostname }}. This variable calls the hostname for the Ansible inventory and uses it with the playbook.

First, we need to change the inventory file to look as follows:

[servers]
server0  ansible_host=192.168.10.10     
server1  ansible_host=192.168.10.11    
server2  ansible_host=192.168.10.12

Then, we use the following playbook:

    - name: change hostname
      hostname:
        name: "{{ inventory_hostname }}"

After executing the playbook, you can simply test it out using an ad hoc Ansible command:

ansible -m shell -a hostname servers

The result should look as follows: