How to set hostname with running number

[dudu.c...@gmail.com]

Hi, 

In my inventory file i have 3 server, I need to set the hostname including prefix1-3

web1

web2

web3

Inventory fie:

[web]

192.168.0.47

192.168.0.48

192.168.0.49

Playbook

- hosts:

    - web

  become: true

  any_errors_fatal: true

  tasks:

    - name: update hostname

      hostname:

        name : "web ????"

[Stefan Hornburg (Racke)]

On 22/11/2021 09:00, dudu.c...@gmail.com wrote:
> Hi,
> In my inventory file i have 3 server, I need to set the hostname including prefix1-3
>
> web1
> web2
> web3
>

> *Inventory fie:*
>
> [web]
> 192.168.0.47
> 192.168.0.48
> 192.168.0.49
>

Add the hostname to the inventory file:

web1 ansible_host=192.168.0.47

> *Playbook*

>
> - hosts:
>     - web
>   become: true
>   any_errors_fatal: true
>   tasks:
>
>
>     - name: update hostname
>       hostname:
>         name : "web ????"
>

Now you can use the inventory_hostname variable in your task:

- name: update hostname
hostname:

name: "{{ inventory_hostname }}"

Please note that might not survive reboots, e.g on Ubuntu I'm doing:

- name: Enable preserving hostname in Cloud configuration
lineinfile:
path: /etc/cloud/cloud.cfg
line: 'preserve_hostname: true'
regexp: '^preserve_hostname:'
tags: hostname

Regards
Racke

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