To be honest, I would also be interested in a solution to this.
Of course all the machines, that I install myself (preseed, kickstart,
...) meet the requirements for ansible.
For already existing machines which should be managed by us, the
requirements are somewhere in the middle of met or unmet.
To my knowledge python-simplejson (required on Python 2.4 boxes) can
only be installed using the raw module and not with the apt or yum module.
Therefore this is a task which I'd not like to be executed on every run.
Maybe the first task in the list could be an ansible ping and if it
fails do some brute-force raw commands.
....
And as writing this I answered my question :-)
My prototype looks like this:
- hosts: all
user: root
tasks:
- name: ping
ping:
register: result
- name: conditional task
raw: here_your_command
when: result|failed
Cheers
Christian
On 04/15/2014 05:34 PM, Dick Davies wrote:
On 15 April 2014 09:24, Joachim Friberg <[email protected]> wrote:
For example I want to do a yum install mysql on a server, but this server
does not have python-simplejson and/or other packages that is neccesary for
Ansible.
In this specific case you'd just assert the python-simplejson package
exists right?
If it's already installed then nothing happens, and you'll be able to
skip on to the
other tasks.
If of course you're in a catch-22 situation (can't run ansible to set
up ansible pre-requisites),
then you'll need to seed your base image with what's required.
For example, my kickstarts bring up a machine with
* SSHd enabled and tcp/22 inbound permitted on the local firewall
* an 'ansible' account with a pre-defined list of SSH keys in its
authorised_keys file
* passwordless sudo configured for that account
Everything else is managed by Ansible.
This general approach also applies to CM with puppet, chef, etc.
(which typically
have much more requirements).
--
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Christian Rusa
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Mobil: 0699 10205595 Fax: 01 9249633
www.toscom.at [email protected]
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