I'd look at a parameterised role. you can apply the role multiple times to
the same
group of nodes with different parameters.
http://docs.ansible.com/ansible/playbooks_roles.html
On 2 October 2015 at 18:25, Dale <[email protected]> wrote:
> Hi
> Im working on an ansible role that allows an application with a
> distributed architecture to be installed on a set of machines. The
> architecture consists of N independent nodes, which operate within their
> own address space and communicate through HTTP. So far everything seems
> straightforward. For each machine, it allow parameters to be overrriden in
> the inventory file per host. For example,
>
> i.e.
>
> [eastcoast]
> eastcoast01 name="node01" memory=2GB
>
> eastcoast02 name="node02" memory=4GB
>
>
>
> This serves the purpose but it is possible that multiple nodes need to be
> installed on the same machine. As far as i can tell this isn't easily
> supported in Ansible. Each node can potentially have its own configuration
> settings e.g. different names.
>
> Repeating the same host doesn't achieve what i need - Ansible actions on
> the host only once.
>
> I considered:
>
> [eastcoast]
> eastcoast01 name="node01" memory=2GB instances=2
>
> eastcoast02 name="node02" memory=4GB
>
>
>
> But this prevents separate configuration settings per instance. Can
> anyone suggest a way to achieve this?
>
> Any approach will need to account for the fact i will need to detect
> multiple instances are on a machine. I'm assuming this can be achieved in
> Jinja logic.
>
> Thanks
> Dale
>
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