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Ansible issue playbook

2012-11-23 (130) by Ton Kersten, tagged as ansible

Playing with Ansible I did get the idea to make a nice welcome message when you log in to a server. This message needs to be placed in a file, which is configured in /etc/ssh/sshd_config with the banner option. I call this file /etc/issue.

Of course I want to deploy this file with Ansible, so I first defined an entry in the hosts file. This looks like this:

# Settings for master
[master]
master

# Variables for master
[master:vars]
location=cow shed
room=ESX5i
issueremarks=This is the master Ansible server. Please be carefull!!

and this is parsed through a Jinja2 template which looks like

{{ figlethost.stdout }}

  ------------------------------------------------------------------------------
                               -- W A R N I N G --
                  UNAUTHORIZED ACCESS STRICTLY PROHIBITED!!
  ------------------------------------------------------------------------------
           System Name : {{ "%-25s"|format(ansible_hostname) }} Location : {{ location }}
           Managed by  : {{ "%-25s"|format(name)             }} Room     : {{ room }}
  ------------------------------------------------------------------------------
{% if issueremarks is defined %}
{{ issueremarks.center(80) }}
  ------------------------------------------------------------------------------
{% endif %}

When combining this all into a playbook this results in

---
- hosts: all
  tasks:
      - name: install figlet
        yum: pkg=figlet state=latest
      - name: figlet name
        command: /usr/bin/figlet -c -w 80 ${ansible_hostname}
        register: figlethost
      - name: deploy issue file
        template: src=issue.in dest=/etc/issue owner=root mode=0444

As you can see there is a registered variable, called figlethost which contains the hostname parsed through figlet. And putting it all together this gives

                                            _
                        _ __ ___   __ _ ___| |_ ___ _ __
                       | '_ ` _ \ / _` / __| __/ _ \ '__|
                       | | | | | | (_| \__ \ ||  __/ |
                       |_| |_| |_|\__,_|___/\__\___|_|

  ------------------------------------------------------------------------------
                               -- W A R N I N G --
                  UNAUTHORIZED ACCESS STRICTLY PROHIBITED!!
  ------------------------------------------------------------------------------
           System Name : master                    Location : cow shed
           Managed by  : Ton Kersten               Room     : ESX5i
  ------------------------------------------------------------------------------
            This is the master Ansible server. Please be carefull!!
  ------------------------------------------------------------------------------

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