Javier,
On 19 September 2014 22:36, Javier Domingo Cansino <[email protected]>
wrote:
> No no, I meant overriding variables. In this case, the variable
> "user_groups" is an array of the groups that the role "users" has to
> install in each machine, and it doesn't inherit from all the "sysadmin"
> group.
>
You are confusing me,
- overriding variables happens within inventory groups, and as documented
- you talk about a "sysadmin group". Is this a /etc/group group or an
ansible group?
I need to know if there is something similar to achieve hierarchies of
> inheritance for variables.
>
Yes, that's what I was talking about. groups within the inventory have a
hierarch
y: child groups override parent groups.
Check
http://docs.ansible.com/intro_inventory.html
and the topic of variable precedence
http://docs.ansible.com/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable
(I'd agree the hierarchy of groups should be better documented though.)
Or a big sample project. I need to understand how stuff is structured,
> because I find it like too linear atm, not allowing to specify that some
> machines have different properties makes harder to me to understand the
> abstraction layers.
>
Basically you can define groups of groups, and the deeper the group, the
higher the level of importance.
>
> I mean not being able to specify exceptions without having them be
> executed twice. (once for all and another for the specific case).
>
You need to execute on the highest level group, then modify variables on
child and/or grandchild groups.
>
> I understand is because of the knowledge I have and that I am accustomed
> to puppet, so any example on how to structure a big project would be really
> helpful. I aim to control everything with ansible, from users,
> configuration, installed programs, iptables rules, applications deployed,
> etc.
>
I'm actually not aware of extensive examples
of group hierarchy. Maybe a fellow list member can help here?
Serge
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