Did you ever find out how this works? I have a variable that's set in both
group_vars/aws/secrets.yml and group_vars/aws_dogfood/secrets.yml, and I
can't figure out why on some servers it uses the variable from "aws" and
others use the variable from "aws_dogfood".
-Bill
On Monday, August 24, 2015 at 10:27:34 AM UTC-7, Duncan Hutty wrote:
>
> I have a host that is a member of 2 groups. Both groups set a variable
> 'my_var' in `group_vars/<group_name>/`. How do I predict which one wins?
> (Ansible-1.9.2)
>
> With this playbook:
>
> ---
> - hosts: all
> gather_facts: no
>
> tasks:
> - name: Show groups for this host
> debug: var=group_names
> - name: Show groups in inventory
> debug: var=groups
> - debug: var=test_var
> - debug: var=second_var
>
>
> And this inventory, inventory/vagrant_ansible_inventory:
>
> # Generated by Vagrant
>
> vagrant1 ansible_ssh_host=127.0.0.1 ansible_ssh_port=2222
> ansible_ssh_private_key_file=.vagrant/machines/vagrant1/virtualbox/private_key
>
>
>
> [a]
> vagrant1
>
> [z]
> vagrant1
>
> And these 2 files in group_vars:
>
> inventory/group_vars/a/a.yml
> test_var: from_a
>
> inventory/group_vars/z/z.yml:
> test_var: from_z
>
>
> And I run ansible-playbook -i inventory/ playbook.yml, I get
>
> TASK: [debug var=test_var]
> ****************************************************
> ok: [vagrant1] => {
> "var": {
> "test_var": "from_infra"
> }
> }
>
> which is exactly as expected for alphabetic precedence (i.e. variables
> files from group 'a' get set first and get overridden by variables set
> in group 'z').
>
> HOWEVER, if add another inventory group 'infra' to the above inventory
> file and another group_vars file, inventory/group_vars/infra/infra.yml,
> then the final variable value is from the 'infra' group - it does *NOT*
> get overridden the the 'z' group, despite the fact that the ansible run
> shows the host is in all 3 groups.
>
> (I've also tried this by setting group membership in the inventory file
> and separately with group_by). I can't guess what the rule is for
> precedence - it doesn't appear to be alphabetic by name of group or by
> name of file.
>
> * Can anyone suggest what the precedence rule is *within* the level of
> inventory variables set in group_vars files[1]?
>
> * Or suggest which part of the source I should be looking at to
> determine for myself?
>
>
> [1]:
>
> http://docs.ansible.com/ansible/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable
>
> --
> Duncan Hutty
> http://www.allgoodbits.org
>
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